forked from gitea/gitea
Issue indexer queue redis support (#6218)
* add redis queue * finished indexer redis queue * add redis vendor * fix vet * Update docs/content/doc/advanced/config-cheat-sheet.en-us.md Co-Authored-By: lunny <xiaolunwen@gmail.com> * switch to go mod * Update required changes for new logging func signatures
This commit is contained in:
Lauris BH
parent
6e4af4985e
commit
e7d7dcb090
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@ -264,6 +264,8 @@ ISSUE_INDEXER_QUEUE_TYPE = levelqueue
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; When ISSUE_INDEXER_QUEUE_TYPE is levelqueue, this will be the queue will be saved path,
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; default is indexers/issues.queue
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ISSUE_INDEXER_QUEUE_DIR = indexers/issues.queue
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; When `ISSUE_INDEXER_QUEUE_TYPE` is `redis`, this will store the redis connection string.
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ISSUE_INDEXER_QUEUE_CONN_STR = "addrs=127.0.0.1:6379 db=0"
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; Batch queue number, default is 20
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ISSUE_INDEXER_QUEUE_BATCH_NUMBER = 20
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@ -158,9 +158,10 @@ Values containing `#` or `;` must be quoted using `` ` `` or `"""`.
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- `ISSUE_INDEXER_TYPE`: **bleve**: Issue indexer type, currently support: bleve or db, if it's db, below issue indexer item will be invalid.
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- `ISSUE_INDEXER_PATH`: **indexers/issues.bleve**: Index file used for issue search.
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- `ISSUE_INDEXER_QUEUE_TYPE`: **levelqueue**: Issue indexer queue, currently support: channel or levelqueue
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- `ISSUE_INDEXER_QUEUE_DIR`: **indexers/issues.queue**: When ISSUE_INDEXER_QUEUE_TYPE is levelqueue, this will be the queue will be saved path
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- `ISSUE_INDEXER_QUEUE_BATCH_NUMBER`: **20**: Batch queue number
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- `ISSUE_INDEXER_QUEUE_TYPE`: **levelqueue**: Issue indexer queue, currently supports:`channel`, `levelqueue`, `redis`.
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- `ISSUE_INDEXER_QUEUE_DIR`: **indexers/issues.queue**: When `ISSUE_INDEXER_QUEUE_TYPE` is `levelqueue`, this will be the queue will be saved path.
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- `ISSUE_INDEXER_QUEUE_CONN_STR`: **addrs=127.0.0.1:6379 db=0**: When `ISSUE_INDEXER_QUEUE_TYPE` is `redis`, this will store the redis connection string.
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- `ISSUE_INDEXER_QUEUE_BATCH_NUMBER`: **20**: Batch queue number.
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- `REPO_INDEXER_ENABLED`: **false**: Enables code search (uses a lot of disk space, about 6 times more than the repository size).
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- `REPO_INDEXER_PATH`: **indexers/repos.bleve**: Index file used for code search.
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@ -82,13 +82,13 @@ menu:
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- `PATH`: Tidb 或者 SQLite3 数据文件存放路径。
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- `LOG_SQL`: **true**: 显示生成的SQL，默认为真。
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## Indexer (`indexer`)
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- `ISSUE_INDEXER_TYPE`: **bleve**: 工单索引类型，当前支持 `bleve` 或 `db`，当为 `db` 时其它工单索引项可不用设置。
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- `ISSUE_INDEXER_PATH`: **indexers/issues.bleve**: 工单索引文件存放路径，当索引类型为 `bleve` 时有效。
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- `ISSUE_INDEXER_QUEUE_TYPE`: **levelqueue**: 工单索引队列类型，当前支持 `channel` 或 `levelqueue`。
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- `ISSUE_INDEXER_QUEUE_TYPE`: **levelqueue**: 工单索引队列类型，当前支持 `channel`， `levelqueue` 或 `redis`。
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- `ISSUE_INDEXER_QUEUE_DIR`: **indexers/issues.queue**: 当 `ISSUE_INDEXER_QUEUE_TYPE` 为 `levelqueue` 时，保存索引队列的磁盘路径。
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- `ISSUE_INDEXER_QUEUE_CONN_STR`: **addrs=127.0.0.1:6379 db=0**: 当 `ISSUE_INDEXER_QUEUE_TYPE` 为 `redis` 时，保存Redis队列的连接字符串。
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- `ISSUE_INDEXER_QUEUE_BATCH_NUMBER`: **20**: 队列处理中批量提交数量。
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- `REPO_INDEXER_ENABLED`: **false**: 是否启用代码搜索（启用后会占用比较大的磁盘空间）。
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1
go.mod
1
go.mod
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@ -54,6 +54,7 @@ require (
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github.com/go-macaron/inject v0.0.0-20160627170012-d8a0b8677191
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github.com/go-macaron/session v0.0.0-20190131233854-0a0a789bf193
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github.com/go-macaron/toolbox v0.0.0-20180818072302-a77f45a7ce90
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github.com/go-redis/redis v6.15.2+incompatible
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github.com/go-sql-driver/mysql v1.4.0
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github.com/go-xorm/builder v0.3.3
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github.com/go-xorm/core v0.6.0
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2
go.sum
2
go.sum
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@ -116,6 +116,8 @@ github.com/go-macaron/session v0.0.0-20190131233854-0a0a789bf193 h1:z/nqwd+ql/r6
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github.com/go-macaron/session v0.0.0-20190131233854-0a0a789bf193/go.mod h1:ScEJm9Gk+ez5JJTml5WlBIqavAfuE5nF8e4Gvyz/X+A=
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github.com/go-macaron/toolbox v0.0.0-20180818072302-a77f45a7ce90 h1:3wYKrRg9IjUMfaf3H0Hh7M5Li9ge79Y7aw2yujHa2jQ=
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github.com/go-macaron/toolbox v0.0.0-20180818072302-a77f45a7ce90/go.mod h1:Ut/NmkIMGVYlEdJBzEZgWVWG5ZpYS9BLmUgXfAgi+qM=
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github.com/go-redis/redis v6.15.2+incompatible h1:9SpNVG76gr6InJGxoZ6IuuxaCOQwDAhzyXg+Bs+0Sb4=
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github.com/go-redis/redis v6.15.2+incompatible/go.mod h1:NAIEuMOZ/fxfXJIrKDQDz8wamY7mA7PouImQ2Jvg6kA=
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github.com/go-sql-driver/mysql v0.0.0-20181218123637-c45f530f8e7f h1:fbIzwEaXt5b2bl9mm+PIufKTSGKk6ZuwSSTQ7iZj7Lo=
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github.com/go-sql-driver/mysql v0.0.0-20181218123637-c45f530f8e7f/go.mod h1:zAC/RDZ24gD3HViQzih4MyKcchzm+sOG5ZlKdlhCg5w=
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github.com/go-xorm/builder v0.3.2/go.mod h1:v8mE3MFBgtL+RGFNfUnAMUqqfk/Y4W5KuwCFQIEpQLk=
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@ -46,9 +46,9 @@ type Indexer interface {
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}
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var (
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// issueIndexerUpdateQueue queue of issue ids to be updated
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issueIndexerUpdateQueue Queue
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issueIndexer Indexer
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// issueIndexerQueue queue of issue ids to be updated
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issueIndexerQueue Queue
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issueIndexer Indexer
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)
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// InitIssueIndexer initialize issue indexer, syncReindex is true then reindex until
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@ -72,27 +72,36 @@ func InitIssueIndexer(syncReindex bool) error {
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}
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if dummyQueue {
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issueIndexerUpdateQueue = &DummyQueue{}
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issueIndexerQueue = &DummyQueue{}
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return nil
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}
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var err error
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switch setting.Indexer.IssueIndexerQueueType {
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switch setting.Indexer.IssueQueueType {
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case setting.LevelQueueType:
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issueIndexerUpdateQueue, err = NewLevelQueue(
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issueIndexerQueue, err = NewLevelQueue(
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issueIndexer,
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setting.Indexer.IssueIndexerQueueDir,
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setting.Indexer.IssueIndexerQueueBatchNumber)
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setting.Indexer.IssueQueueDir,
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setting.Indexer.IssueQueueBatchNumber)
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if err != nil {
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return err
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}
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case setting.ChannelQueueType:
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issueIndexerUpdateQueue = NewChannelQueue(issueIndexer, setting.Indexer.IssueIndexerQueueBatchNumber)
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issueIndexerQueue = NewChannelQueue(issueIndexer, setting.Indexer.IssueQueueBatchNumber)
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case setting.RedisQueueType:
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addrs, pass, idx, err := parseConnStr(setting.Indexer.IssueQueueConnStr)
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if err != nil {
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return err
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}
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issueIndexerQueue, err = NewRedisQueue(addrs, pass, idx, issueIndexer, setting.Indexer.IssueQueueBatchNumber)
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if err != nil {
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return err
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}
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default:
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return fmt.Errorf("Unsupported indexer queue type: %v", setting.Indexer.IssueIndexerQueueType)
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return fmt.Errorf("Unsupported indexer queue type: %v", setting.Indexer.IssueQueueType)
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}
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go issueIndexerUpdateQueue.Run()
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go issueIndexerQueue.Run()
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if populate {
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if syncReindex {
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@ -152,7 +161,7 @@ func UpdateIssueIndexer(issue *models.Issue) {
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comments = append(comments, comment.Content)
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}
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}
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issueIndexerUpdateQueue.Push(&IndexerData{
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issueIndexerQueue.Push(&IndexerData{
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ID: issue.ID,
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RepoID: issue.RepoID,
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Title: issue.Title,
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@ -174,7 +183,7 @@ func DeleteRepoIssueIndexer(repo *models.Repository) {
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return
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}
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issueIndexerUpdateQueue.Push(&IndexerData{
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issueIndexerQueue.Push(&IndexerData{
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IDs: ids,
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IsDelete: true,
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})
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@ -29,7 +29,7 @@ func TestMain(m *testing.M) {
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func TestBleveSearchIssues(t *testing.T) {
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assert.NoError(t, models.PrepareTestDatabase())
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os.RemoveAll(setting.Indexer.IssueIndexerQueueDir)
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os.RemoveAll(setting.Indexer.IssueQueueDir)
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os.RemoveAll(setting.Indexer.IssuePath)
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setting.Indexer.IssueType = "bleve"
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if err := InitIssueIndexer(true); err != nil {
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@ -0,0 +1,145 @@
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// Copyright 2019 The Gitea Authors. All rights reserved.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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package issues
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import (
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"encoding/json"
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"errors"
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"strconv"
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"strings"
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"time"
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"code.gitea.io/gitea/modules/log"
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"github.com/go-redis/redis"
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)
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var (
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_ Queue = &RedisQueue{}
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)
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type redisClient interface {
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RPush(key string, args ...interface{}) *redis.IntCmd
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LPop(key string) *redis.StringCmd
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Ping() *redis.StatusCmd
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}
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// RedisQueue redis queue
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type RedisQueue struct {
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client redisClient
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queueName string
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indexer Indexer
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batchNumber int
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}
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func parseConnStr(connStr string) (addrs, password string, dbIdx int, err error) {
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fields := strings.Fields(connStr)
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for _, f := range fields {
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items := strings.SplitN(f, "=", 2)
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if len(items) < 2 {
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continue
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}
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switch strings.ToLower(items[0]) {
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case "addrs":
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addrs = items[1]
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case "password":
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password = items[1]
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case "db":
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dbIdx, err = strconv.Atoi(items[1])
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if err != nil {
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return
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}
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}
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}
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return
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}
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// NewRedisQueue creates single redis or cluster redis queue
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func NewRedisQueue(addrs string, password string, dbIdx int, indexer Indexer, batchNumber int) (*RedisQueue, error) {
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dbs := strings.Split(addrs, ",")
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var queue = RedisQueue{
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queueName: "issue_indexer_queue",
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indexer: indexer,
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batchNumber: batchNumber,
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}
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if len(dbs) == 0 {
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return nil, errors.New("no redis host found")
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} else if len(dbs) == 1 {
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queue.client = redis.NewClient(&redis.Options{
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Addr: strings.TrimSpace(dbs[0]), // use default Addr
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Password: password, // no password set
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DB: dbIdx, // use default DB
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})
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} else {
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queue.client = redis.NewClusterClient(&redis.ClusterOptions{
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Addrs: dbs,
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})
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}
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if err := queue.client.Ping().Err(); err != nil {
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return nil, err
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}
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return &queue, nil
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}
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// Run runs the redis queue
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func (r *RedisQueue) Run() error {
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var i int
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var datas = make([]*IndexerData, 0, r.batchNumber)
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for {
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bs, err := r.client.LPop(r.queueName).Bytes()
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if err != nil && err != redis.Nil {
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log.Error("LPop faile: %v", err)
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time.Sleep(time.Millisecond * 100)
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continue
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}
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i++
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if len(datas) > r.batchNumber || (len(datas) > 0 && i > 3) {
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r.indexer.Index(datas)
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datas = make([]*IndexerData, 0, r.batchNumber)
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i = 0
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}
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if len(bs) <= 0 {
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time.Sleep(time.Millisecond * 100)
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continue
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}
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var data IndexerData
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err = json.Unmarshal(bs, &data)
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if err != nil {
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log.Error("Unmarshal: %v", err)
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time.Sleep(time.Millisecond * 100)
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continue
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}
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log.Trace("RedisQueue: task found: %#v", data)
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if data.IsDelete {
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if data.ID > 0 {
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if err = r.indexer.Delete(data.ID); err != nil {
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log.Error("indexer.Delete: %v", err)
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}
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} else if len(data.IDs) > 0 {
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if err = r.indexer.Delete(data.IDs...); err != nil {
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log.Error("indexer.Delete: %v", err)
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}
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}
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time.Sleep(time.Millisecond * 100)
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continue
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}
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datas = append(datas, &data)
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time.Sleep(time.Millisecond * 100)
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}
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}
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// Push implements Queue
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func (r *RedisQueue) Push(data *IndexerData) error {
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bs, err := json.Marshal(data)
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if err != nil {
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return err
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}
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return r.client.RPush(r.queueName, bs).Err()
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}
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@ -13,26 +13,29 @@ import (
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const (
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LevelQueueType = "levelqueue"
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ChannelQueueType = "channel"
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RedisQueueType = "redis"
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)
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var (
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// Indexer settings
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Indexer = struct {
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IssueType string
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IssuePath string
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RepoIndexerEnabled bool
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RepoPath string
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UpdateQueueLength int
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MaxIndexerFileSize int64
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IssueIndexerQueueType string
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IssueIndexerQueueDir string
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IssueIndexerQueueBatchNumber int
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IssueType string
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IssuePath string
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RepoIndexerEnabled bool
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RepoPath string
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UpdateQueueLength int
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MaxIndexerFileSize int64
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IssueQueueType string
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IssueQueueDir string
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IssueQueueConnStr string
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IssueQueueBatchNumber int
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}{
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IssueType: "bleve",
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IssuePath: "indexers/issues.bleve",
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IssueIndexerQueueType: LevelQueueType,
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IssueIndexerQueueDir: "indexers/issues.queue",
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IssueIndexerQueueBatchNumber: 20,
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IssueType: "bleve",
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IssuePath: "indexers/issues.bleve",
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IssueQueueType: LevelQueueType,
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IssueQueueDir: "indexers/issues.queue",
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IssueQueueConnStr: "",
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IssueQueueBatchNumber: 20,
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}
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)
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@ -50,7 +53,8 @@ func newIndexerService() {
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}
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Indexer.UpdateQueueLength = sec.Key("UPDATE_BUFFER_LEN").MustInt(20)
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Indexer.MaxIndexerFileSize = sec.Key("MAX_FILE_SIZE").MustInt64(1024 * 1024)
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Indexer.IssueIndexerQueueType = sec.Key("ISSUE_INDEXER_QUEUE_TYPE").MustString(LevelQueueType)
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Indexer.IssueIndexerQueueDir = sec.Key("ISSUE_INDEXER_QUEUE_DIR").MustString(path.Join(AppDataPath, "indexers/issues.queue"))
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Indexer.IssueIndexerQueueBatchNumber = sec.Key("ISSUE_INDEXER_QUEUE_BATCH_NUMBER").MustInt(20)
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Indexer.IssueQueueType = sec.Key("ISSUE_INDEXER_QUEUE_TYPE").MustString(LevelQueueType)
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Indexer.IssueQueueDir = sec.Key("ISSUE_INDEXER_QUEUE_DIR").MustString(path.Join(AppDataPath, "indexers/issues.queue"))
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Indexer.IssueQueueConnStr = sec.Key("ISSUE_INDEXER_QUEUE_CONN_STR").MustString(path.Join(AppDataPath, ""))
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Indexer.IssueQueueBatchNumber = sec.Key("ISSUE_INDEXER_QUEUE_BATCH_NUMBER").MustInt(20)
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}
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|
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@ -0,0 +1,2 @@
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*.rdb
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testdata/*/
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@ -0,0 +1,19 @@
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sudo: false
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language: go
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services:
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- redis-server
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go:
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- 1.9.x
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- 1.10.x
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- 1.11.x
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- tip
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matrix:
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allow_failures:
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- go: tip
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install:
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- go get github.com/onsi/ginkgo
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- go get github.com/onsi/gomega
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@ -0,0 +1,25 @@
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# Changelog
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## Unreleased
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- Cluster and Ring pipelines process commands for each node in its own goroutine.
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## 6.14
|
||||
|
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- Added Options.MinIdleConns.
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- Added Options.MaxConnAge.
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- PoolStats.FreeConns is renamed to PoolStats.IdleConns.
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- Add Client.Do to simplify creating custom commands.
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- Add Cmd.String, Cmd.Int, Cmd.Int64, Cmd.Uint64, Cmd.Float64, and Cmd.Bool helpers.
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- Lower memory usage.
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## v6.13
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- Ring got new options called `HashReplicas` and `Hash`. It is recommended to set `HashReplicas = 1000` for better keys distribution between shards.
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- Cluster client was optimized to use much less memory when reloading cluster state.
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- PubSub.ReceiveMessage is re-worked to not use ReceiveTimeout so it does not lose data when timeout occurres. In most cases it is recommended to use PubSub.Channel instead.
|
||||
- Dialer.KeepAlive is set to 5 minutes by default.
|
||||
|
||||
## v6.12
|
||||
|
||||
- ClusterClient got new option called `ClusterSlots` which allows to build cluster of normal Redis Servers that don't have cluster mode enabled. See https://godoc.org/github.com/go-redis/redis#example-NewClusterClient--ManualSetup
|
||||
|
|
@ -0,0 +1,25 @@
|
|||
Copyright (c) 2013 The github.com/go-redis/redis Authors.
|
||||
All rights reserved.
|
||||
|
||||
Redistribution and use in source and binary forms, with or without
|
||||
modification, are permitted provided that the following conditions are
|
||||
met:
|
||||
|
||||
* Redistributions of source code must retain the above copyright
|
||||
notice, this list of conditions and the following disclaimer.
|
||||
* Redistributions in binary form must reproduce the above
|
||||
copyright notice, this list of conditions and the following disclaimer
|
||||
in the documentation and/or other materials provided with the
|
||||
distribution.
|
||||
|
||||
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||||
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||||
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
||||
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
||||
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
||||
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
||||
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
||||
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
||||
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||||
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
||||
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
|
|
@ -0,0 +1,22 @@
|
|||
all: testdeps
|
||||
go test ./...
|
||||
go test ./... -short -race
|
||||
env GOOS=linux GOARCH=386 go test ./...
|
||||
go vet
|
||||
go get github.com/gordonklaus/ineffassign
|
||||
ineffassign .
|
||||
|
||||
testdeps: testdata/redis/src/redis-server
|
||||
|
||||
bench: testdeps
|
||||
go test ./... -test.run=NONE -test.bench=. -test.benchmem
|
||||
|
||||
.PHONY: all test testdeps bench
|
||||
|
||||
testdata/redis:
|
||||
mkdir -p $@
|
||||
wget -qO- https://github.com/antirez/redis/archive/5.0.tar.gz | tar xvz --strip-components=1 -C $@
|
||||
|
||||
testdata/redis/src/redis-server: testdata/redis
|
||||
sed -i.bak 's/libjemalloc.a/libjemalloc.a -lrt/g' $</src/Makefile
|
||||
cd $< && make all
|
||||
|
|
@ -0,0 +1,146 @@
|
|||
# Redis client for Golang
|
||||
|
||||
[](https://travis-ci.org/go-redis/redis)
|
||||
[](https://godoc.org/github.com/go-redis/redis)
|
||||
[](https://airbrake.io)
|
||||
|
||||
Supports:
|
||||
|
||||
- Redis 3 commands except QUIT, MONITOR, SLOWLOG and SYNC.
|
||||
- Automatic connection pooling with [circuit breaker](https://en.wikipedia.org/wiki/Circuit_breaker_design_pattern) support.
|
||||
- [Pub/Sub](https://godoc.org/github.com/go-redis/redis#PubSub).
|
||||
- [Transactions](https://godoc.org/github.com/go-redis/redis#Multi).
|
||||
- [Pipeline](https://godoc.org/github.com/go-redis/redis#example-Client-Pipeline) and [TxPipeline](https://godoc.org/github.com/go-redis/redis#example-Client-TxPipeline).
|
||||
- [Scripting](https://godoc.org/github.com/go-redis/redis#Script).
|
||||
- [Timeouts](https://godoc.org/github.com/go-redis/redis#Options).
|
||||
- [Redis Sentinel](https://godoc.org/github.com/go-redis/redis#NewFailoverClient).
|
||||
- [Redis Cluster](https://godoc.org/github.com/go-redis/redis#NewClusterClient).
|
||||
- [Cluster of Redis Servers](https://godoc.org/github.com/go-redis/redis#example-NewClusterClient--ManualSetup) without using cluster mode and Redis Sentinel.
|
||||
- [Ring](https://godoc.org/github.com/go-redis/redis#NewRing).
|
||||
- [Instrumentation](https://godoc.org/github.com/go-redis/redis#ex-package--Instrumentation).
|
||||
- [Cache friendly](https://github.com/go-redis/cache).
|
||||
- [Rate limiting](https://github.com/go-redis/redis_rate).
|
||||
- [Distributed Locks](https://github.com/bsm/redis-lock).
|
||||
|
||||
API docs: https://godoc.org/github.com/go-redis/redis.
|
||||
Examples: https://godoc.org/github.com/go-redis/redis#pkg-examples.
|
||||
|
||||
## Installation
|
||||
|
||||
Install:
|
||||
|
||||
```shell
|
||||
go get -u github.com/go-redis/redis
|
||||
```
|
||||
|
||||
Import:
|
||||
|
||||
```go
|
||||
import "github.com/go-redis/redis"
|
||||
```
|
||||
|
||||
## Quickstart
|
||||
|
||||
```go
|
||||
func ExampleNewClient() {
|
||||
client := redis.NewClient(&redis.Options{
|
||||
Addr: "localhost:6379",
|
||||
Password: "", // no password set
|
||||
DB: 0, // use default DB
|
||||
})
|
||||
|
||||
pong, err := client.Ping().Result()
|
||||
fmt.Println(pong, err)
|
||||
// Output: PONG <nil>
|
||||
}
|
||||
|
||||
func ExampleClient() {
|
||||
err := client.Set("key", "value", 0).Err()
|
||||
if err != nil {
|
||||
panic(err)
|
||||
}
|
||||
|
||||
val, err := client.Get("key").Result()
|
||||
if err != nil {
|
||||
panic(err)
|
||||
}
|
||||
fmt.Println("key", val)
|
||||
|
||||
val2, err := client.Get("key2").Result()
|
||||
if err == redis.Nil {
|
||||
fmt.Println("key2 does not exist")
|
||||
} else if err != nil {
|
||||
panic(err)
|
||||
} else {
|
||||
fmt.Println("key2", val2)
|
||||
}
|
||||
// Output: key value
|
||||
// key2 does not exist
|
||||
}
|
||||
```
|
||||
|
||||
## Howto
|
||||
|
||||
Please go through [examples](https://godoc.org/github.com/go-redis/redis#pkg-examples) to get an idea how to use this package.
|
||||
|
||||
## Look and feel
|
||||
|
||||
Some corner cases:
|
||||
|
||||
```go
|
||||
// SET key value EX 10 NX
|
||||
set, err := client.SetNX("key", "value", 10*time.Second).Result()
|
||||
|
||||
// SORT list LIMIT 0 2 ASC
|
||||
vals, err := client.Sort("list", redis.Sort{Offset: 0, Count: 2, Order: "ASC"}).Result()
|
||||
|
||||
// ZRANGEBYSCORE zset -inf +inf WITHSCORES LIMIT 0 2
|
||||
vals, err := client.ZRangeByScoreWithScores("zset", redis.ZRangeBy{
|
||||
Min: "-inf",
|
||||
Max: "+inf",
|
||||
Offset: 0,
|
||||
Count: 2,
|
||||
}).Result()
|
||||
|
||||
// ZINTERSTORE out 2 zset1 zset2 WEIGHTS 2 3 AGGREGATE SUM
|
||||
vals, err := client.ZInterStore("out", redis.ZStore{Weights: []int64{2, 3}}, "zset1", "zset2").Result()
|
||||
|
||||
// EVAL "return {KEYS[1],ARGV[1]}" 1 "key" "hello"
|
||||
vals, err := client.Eval("return {KEYS[1],ARGV[1]}", []string{"key"}, "hello").Result()
|
||||
```
|
||||
|
||||
## Benchmark
|
||||
|
||||
go-redis vs redigo:
|
||||
|
||||
```
|
||||
BenchmarkSetGoRedis10Conns64Bytes-4 200000 7621 ns/op 210 B/op 6 allocs/op
|
||||
BenchmarkSetGoRedis100Conns64Bytes-4 200000 7554 ns/op 210 B/op 6 allocs/op
|
||||
BenchmarkSetGoRedis10Conns1KB-4 200000 7697 ns/op 210 B/op 6 allocs/op
|
||||
BenchmarkSetGoRedis100Conns1KB-4 200000 7688 ns/op 210 B/op 6 allocs/op
|
||||
BenchmarkSetGoRedis10Conns10KB-4 200000 9214 ns/op 210 B/op 6 allocs/op
|
||||
BenchmarkSetGoRedis100Conns10KB-4 200000 9181 ns/op 210 B/op 6 allocs/op
|
||||
BenchmarkSetGoRedis10Conns1MB-4 2000 583242 ns/op 2337 B/op 6 allocs/op
|
||||
BenchmarkSetGoRedis100Conns1MB-4 2000 583089 ns/op 2338 B/op 6 allocs/op
|
||||
BenchmarkSetRedigo10Conns64Bytes-4 200000 7576 ns/op 208 B/op 7 allocs/op
|
||||
BenchmarkSetRedigo100Conns64Bytes-4 200000 7782 ns/op 208 B/op 7 allocs/op
|
||||
BenchmarkSetRedigo10Conns1KB-4 200000 7958 ns/op 208 B/op 7 allocs/op
|
||||
BenchmarkSetRedigo100Conns1KB-4 200000 7725 ns/op 208 B/op 7 allocs/op
|
||||
BenchmarkSetRedigo10Conns10KB-4 100000 18442 ns/op 208 B/op 7 allocs/op
|
||||
BenchmarkSetRedigo100Conns10KB-4 100000 18818 ns/op 208 B/op 7 allocs/op
|
||||
BenchmarkSetRedigo10Conns1MB-4 2000 668829 ns/op 226 B/op 7 allocs/op
|
||||
BenchmarkSetRedigo100Conns1MB-4 2000 679542 ns/op 226 B/op 7 allocs/op
|
||||
```
|
||||
|
||||
Redis Cluster:
|
||||
|
||||
```
|
||||
BenchmarkRedisPing-4 200000 6983 ns/op 116 B/op 4 allocs/op
|
||||
BenchmarkRedisClusterPing-4 100000 11535 ns/op 117 B/op 4 allocs/op
|
||||
```
|
||||
|
||||
## See also
|
||||
|
||||
- [Golang PostgreSQL ORM](https://github.com/go-pg/pg)
|
||||
- [Golang msgpack](https://github.com/vmihailenco/msgpack)
|
||||
- [Golang message task queue](https://github.com/go-msgqueue/msgqueue)
|
||||
File diff suppressed because it is too large
Load Diff
|
|
@ -0,0 +1,22 @@
|
|||
package redis
|
||||
|
||||
import "sync/atomic"
|
||||
|
||||
func (c *ClusterClient) DBSize() *IntCmd {
|
||||
cmd := NewIntCmd("dbsize")
|
||||
var size int64
|
||||
err := c.ForEachMaster(func(master *Client) error {
|
||||
n, err := master.DBSize().Result()
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
atomic.AddInt64(&size, n)
|
||||
return nil
|
||||
})
|
||||
if err != nil {
|
||||
cmd.setErr(err)
|
||||
return cmd
|
||||
}
|
||||
cmd.val = size
|
||||
return cmd
|
||||
}
|
||||
File diff suppressed because it is too large
Load Diff
File diff suppressed because it is too large
Load Diff
|
|
@ -0,0 +1,4 @@
|
|||
/*
|
||||
Package redis implements a Redis client.
|
||||
*/
|
||||
package redis
|
||||
81
vendor/github.com/go-redis/redis/internal/consistenthash/consistenthash.go
generated
vendored
Normal file
81
vendor/github.com/go-redis/redis/internal/consistenthash/consistenthash.go
generated
vendored
Normal file
|
|
@ -0,0 +1,81 @@
|
|||
/*
|
||||
Copyright 2013 Google Inc.
|
||||
|
||||
Licensed under the Apache License, Version 2.0 (the "License");
|
||||
you may not use this file except in compliance with the License.
|
||||
You may obtain a copy of the License at
|
||||
|
||||
http://www.apache.org/licenses/LICENSE-2.0
|
||||
|
||||
Unless required by applicable law or agreed to in writing, software
|
||||
distributed under the License is distributed on an "AS IS" BASIS,
|
||||
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||
See the License for the specific language governing permissions and
|
||||
limitations under the License.
|
||||
*/
|
||||
|
||||
// Package consistenthash provides an implementation of a ring hash.
|
||||
package consistenthash
|
||||
|
||||
import (
|
||||
"hash/crc32"
|
||||
"sort"
|
||||
"strconv"
|
||||
)
|
||||
|
||||
type Hash func(data []byte) uint32
|
||||
|
||||
type Map struct {
|
||||
hash Hash
|
||||
replicas int
|
||||
keys []int // Sorted
|
||||
hashMap map[int]string
|
||||
}
|
||||
|
||||
func New(replicas int, fn Hash) *Map {
|
||||
m := &Map{
|
||||
replicas: replicas,
|
||||
hash: fn,
|
||||
hashMap: make(map[int]string),
|
||||
}
|
||||
if m.hash == nil {
|
||||
m.hash = crc32.ChecksumIEEE
|
||||
}
|
||||
return m
|
||||
}
|
||||
|
||||
// Returns true if there are no items available.
|
||||
func (m *Map) IsEmpty() bool {
|
||||
return len(m.keys) == 0
|
||||
}
|
||||
|
||||
// Adds some keys to the hash.
|
||||
func (m *Map) Add(keys ...string) {
|
||||
for _, key := range keys {
|
||||
for i := 0; i < m.replicas; i++ {
|
||||
hash := int(m.hash([]byte(strconv.Itoa(i) + key)))
|
||||
m.keys = append(m.keys, hash)
|
||||
m.hashMap[hash] = key
|
||||
}
|
||||
}
|
||||
sort.Ints(m.keys)
|
||||
}
|
||||
|
||||
// Gets the closest item in the hash to the provided key.
|
||||
func (m *Map) Get(key string) string {
|
||||
if m.IsEmpty() {
|
||||
return ""
|
||||
}
|
||||
|
||||
hash := int(m.hash([]byte(key)))
|
||||
|
||||
// Binary search for appropriate replica.
|
||||
idx := sort.Search(len(m.keys), func(i int) bool { return m.keys[i] >= hash })
|
||||
|
||||
// Means we have cycled back to the first replica.
|
||||
if idx == len(m.keys) {
|
||||
idx = 0
|
||||
}
|
||||
|
||||
return m.hashMap[m.keys[idx]]
|
||||
}
|
||||
|
|
@ -0,0 +1,89 @@
|
|||
package internal
|
||||
|
||||
import (
|
||||
"io"
|
||||
"net"
|
||||
"strings"
|
||||
|
||||
"github.com/go-redis/redis/internal/proto"
|
||||
)
|
||||
|
||||
func IsRetryableError(err error, retryTimeout bool) bool {
|
||||
if err == nil {
|
||||
return false
|
||||
}
|
||||
if err == io.EOF {
|
||||
return true
|
||||
}
|
||||
if netErr, ok := err.(net.Error); ok {
|
||||
if netErr.Timeout() {
|
||||
return retryTimeout
|
||||
}
|
||||
return true
|
||||
}
|
||||
s := err.Error()
|
||||
if s == "ERR max number of clients reached" {
|
||||
return true
|
||||
}
|
||||
if strings.HasPrefix(s, "LOADING ") {
|
||||
return true
|
||||
}
|
||||
if strings.HasPrefix(s, "READONLY ") {
|
||||
return true
|
||||
}
|
||||
if strings.HasPrefix(s, "CLUSTERDOWN ") {
|
||||
return true
|
||||
}
|
||||
return false
|
||||
}
|
||||
|
||||
func IsRedisError(err error) bool {
|
||||
_, ok := err.(proto.RedisError)
|
||||
return ok
|
||||
}
|
||||
|
||||
func IsBadConn(err error, allowTimeout bool) bool {
|
||||
if err == nil {
|
||||
return false
|
||||
}
|
||||
if IsRedisError(err) {
|
||||
// #790
|
||||
return IsReadOnlyError(err)
|
||||
}
|
||||
if allowTimeout {
|
||||
if netErr, ok := err.(net.Error); ok && netErr.Timeout() {
|
||||
return false
|
||||
}
|
||||
}
|
||||
return true
|
||||
}
|
||||
|
||||
func IsMovedError(err error) (moved bool, ask bool, addr string) {
|
||||
if !IsRedisError(err) {
|
||||
return
|
||||
}
|
||||
|
||||
s := err.Error()
|
||||
if strings.HasPrefix(s, "MOVED ") {
|
||||
moved = true
|
||||
} else if strings.HasPrefix(s, "ASK ") {
|
||||
ask = true
|
||||
} else {
|
||||
return
|
||||
}
|
||||
|
||||
ind := strings.LastIndex(s, " ")
|
||||
if ind == -1 {
|
||||
return false, false, ""
|
||||
}
|
||||
addr = s[ind+1:]
|
||||
return
|
||||
}
|
||||
|
||||
func IsLoadingError(err error) bool {
|
||||
return strings.HasPrefix(err.Error(), "LOADING ")
|
||||
}
|
||||
|
||||
func IsReadOnlyError(err error) bool {
|
||||
return strings.HasPrefix(err.Error(), "READONLY ")
|
||||
}
|
||||
|
|
@ -0,0 +1,77 @@
|
|||
package hashtag
|
||||
|
||||
import (
|
||||
"math/rand"
|
||||
"strings"
|
||||
)
|
||||
|
||||
const slotNumber = 16384
|
||||
|
||||
// CRC16 implementation according to CCITT standards.
|
||||
// Copyright 2001-2010 Georges Menie (www.menie.org)
|
||||
// Copyright 2013 The Go Authors. All rights reserved.
|
||||
// http://redis.io/topics/cluster-spec#appendix-a-crc16-reference-implementation-in-ansi-c
|
||||
var crc16tab = [256]uint16{
|
||||
0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50a5, 0x60c6, 0x70e7,
|
||||
0x8108, 0x9129, 0xa14a, 0xb16b, 0xc18c, 0xd1ad, 0xe1ce, 0xf1ef,
|
||||
0x1231, 0x0210, 0x3273, 0x2252, 0x52b5, 0x4294, 0x72f7, 0x62d6,
|
||||
0x9339, 0x8318, 0xb37b, 0xa35a, 0xd3bd, 0xc39c, 0xf3ff, 0xe3de,
|
||||
0x2462, 0x3443, 0x0420, 0x1401, 0x64e6, 0x74c7, 0x44a4, 0x5485,
|
||||
0xa56a, 0xb54b, 0x8528, 0x9509, 0xe5ee, 0xf5cf, 0xc5ac, 0xd58d,
|
||||
0x3653, 0x2672, 0x1611, 0x0630, 0x76d7, 0x66f6, 0x5695, 0x46b4,
|
||||
0xb75b, 0xa77a, 0x9719, 0x8738, 0xf7df, 0xe7fe, 0xd79d, 0xc7bc,
|
||||
0x48c4, 0x58e5, 0x6886, 0x78a7, 0x0840, 0x1861, 0x2802, 0x3823,
|
||||
0xc9cc, 0xd9ed, 0xe98e, 0xf9af, 0x8948, 0x9969, 0xa90a, 0xb92b,
|
||||
0x5af5, 0x4ad4, 0x7ab7, 0x6a96, 0x1a71, 0x0a50, 0x3a33, 0x2a12,
|
||||
0xdbfd, 0xcbdc, 0xfbbf, 0xeb9e, 0x9b79, 0x8b58, 0xbb3b, 0xab1a,
|
||||
0x6ca6, 0x7c87, 0x4ce4, 0x5cc5, 0x2c22, 0x3c03, 0x0c60, 0x1c41,
|
||||
0xedae, 0xfd8f, 0xcdec, 0xddcd, 0xad2a, 0xbd0b, 0x8d68, 0x9d49,
|
||||
0x7e97, 0x6eb6, 0x5ed5, 0x4ef4, 0x3e13, 0x2e32, 0x1e51, 0x0e70,
|
||||
0xff9f, 0xefbe, 0xdfdd, 0xcffc, 0xbf1b, 0xaf3a, 0x9f59, 0x8f78,
|
||||
0x9188, 0x81a9, 0xb1ca, 0xa1eb, 0xd10c, 0xc12d, 0xf14e, 0xe16f,
|
||||
0x1080, 0x00a1, 0x30c2, 0x20e3, 0x5004, 0x4025, 0x7046, 0x6067,
|
||||
0x83b9, 0x9398, 0xa3fb, 0xb3da, 0xc33d, 0xd31c, 0xe37f, 0xf35e,
|
||||
0x02b1, 0x1290, 0x22f3, 0x32d2, 0x4235, 0x5214, 0x6277, 0x7256,
|
||||
0xb5ea, 0xa5cb, 0x95a8, 0x8589, 0xf56e, 0xe54f, 0xd52c, 0xc50d,
|
||||
0x34e2, 0x24c3, 0x14a0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405,
|
||||
0xa7db, 0xb7fa, 0x8799, 0x97b8, 0xe75f, 0xf77e, 0xc71d, 0xd73c,
|
||||
0x26d3, 0x36f2, 0x0691, 0x16b0, 0x6657, 0x7676, 0x4615, 0x5634,
|
||||
0xd94c, 0xc96d, 0xf90e, 0xe92f, 0x99c8, 0x89e9, 0xb98a, 0xa9ab,
|
||||
0x5844, 0x4865, 0x7806, 0x6827, 0x18c0, 0x08e1, 0x3882, 0x28a3,
|
||||
0xcb7d, 0xdb5c, 0xeb3f, 0xfb1e, 0x8bf9, 0x9bd8, 0xabbb, 0xbb9a,
|
||||
0x4a75, 0x5a54, 0x6a37, 0x7a16, 0x0af1, 0x1ad0, 0x2ab3, 0x3a92,
|
||||
0xfd2e, 0xed0f, 0xdd6c, 0xcd4d, 0xbdaa, 0xad8b, 0x9de8, 0x8dc9,
|
||||
0x7c26, 0x6c07, 0x5c64, 0x4c45, 0x3ca2, 0x2c83, 0x1ce0, 0x0cc1,
|
||||
0xef1f, 0xff3e, 0xcf5d, 0xdf7c, 0xaf9b, 0xbfba, 0x8fd9, 0x9ff8,
|
||||
0x6e17, 0x7e36, 0x4e55, 0x5e74, 0x2e93, 0x3eb2, 0x0ed1, 0x1ef0,
|
||||
}
|
||||
|
||||
func Key(key string) string {
|
||||
if s := strings.IndexByte(key, '{'); s > -1 {
|
||||
if e := strings.IndexByte(key[s+1:], '}'); e > 0 {
|
||||
return key[s+1 : s+e+1]
|
||||
}
|
||||
}
|
||||
return key
|
||||
}
|
||||
|
||||
func RandomSlot() int {
|
||||
return rand.Intn(slotNumber)
|
||||
}
|
||||
|
||||
// hashSlot returns a consistent slot number between 0 and 16383
|
||||
// for any given string key.
|
||||
func Slot(key string) int {
|
||||
if key == "" {
|
||||
return RandomSlot()
|
||||
}
|
||||
key = Key(key)
|
||||
return int(crc16sum(key)) % slotNumber
|
||||
}
|
||||
|
||||
func crc16sum(key string) (crc uint16) {
|
||||
for i := 0; i < len(key); i++ {
|
||||
crc = (crc << 8) ^ crc16tab[(byte(crc>>8)^key[i])&0x00ff]
|
||||
}
|
||||
return
|
||||
}
|
||||
|
|
@ -0,0 +1,24 @@
|
|||
package internal
|
||||
|
||||
import (
|
||||
"math/rand"
|
||||
"time"
|
||||
)
|
||||
|
||||
// Retry backoff with jitter sleep to prevent overloaded conditions during intervals
|
||||
// https://www.awsarchitectureblog.com/2015/03/backoff.html
|
||||
func RetryBackoff(retry int, minBackoff, maxBackoff time.Duration) time.Duration {
|
||||
if retry < 0 {
|
||||
retry = 0
|
||||
}
|
||||
|
||||
backoff := minBackoff << uint(retry)
|
||||
if backoff > maxBackoff || backoff < minBackoff {
|
||||
backoff = maxBackoff
|
||||
}
|
||||
|
||||
if backoff == 0 {
|
||||
return 0
|
||||
}
|
||||
return time.Duration(rand.Int63n(int64(backoff)))
|
||||
}
|
||||
|
|
@ -0,0 +1,15 @@
|
|||
package internal
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"log"
|
||||
)
|
||||
|
||||
var Logger *log.Logger
|
||||
|
||||
func Logf(s string, args ...interface{}) {
|
||||
if Logger == nil {
|
||||
return
|
||||
}
|
||||
Logger.Output(2, fmt.Sprintf(s, args...))
|
||||
}
|
||||
|
|
@ -0,0 +1,60 @@
|
|||
/*
|
||||
Copyright 2014 The Camlistore Authors
|
||||
|
||||
Licensed under the Apache License, Version 2.0 (the "License");
|
||||
you may not use this file except in compliance with the License.
|
||||
You may obtain a copy of the License at
|
||||
|
||||
http://www.apache.org/licenses/LICENSE-2.0
|
||||
|
||||
Unless required by applicable law or agreed to in writing, software
|
||||
distributed under the License is distributed on an "AS IS" BASIS,
|
||||
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||
See the License for the specific language governing permissions and
|
||||
limitations under the License.
|
||||
*/
|
||||
|
||||
package internal
|
||||
|
||||
import (
|
||||
"sync"
|
||||
"sync/atomic"
|
||||
)
|
||||
|
||||
// A Once will perform a successful action exactly once.
|
||||
//
|
||||
// Unlike a sync.Once, this Once's func returns an error
|
||||
// and is re-armed on failure.
|
||||
type Once struct {
|
||||
m sync.Mutex
|
||||
done uint32
|
||||
}
|
||||
|
||||
// Do calls the function f if and only if Do has not been invoked
|
||||
// without error for this instance of Once. In other words, given
|
||||
// var once Once
|
||||
// if once.Do(f) is called multiple times, only the first call will
|
||||
// invoke f, even if f has a different value in each invocation unless
|
||||
// f returns an error. A new instance of Once is required for each
|
||||
// function to execute.
|
||||
//
|
||||
// Do is intended for initialization that must be run exactly once. Since f
|
||||
// is niladic, it may be necessary to use a function literal to capture the
|
||||
// arguments to a function to be invoked by Do:
|
||||
// err := config.once.Do(func() error { return config.init(filename) })
|
||||
func (o *Once) Do(f func() error) error {
|
||||
if atomic.LoadUint32(&o.done) == 1 {
|
||||
return nil
|
||||
}
|
||||
// Slow-path.
|
||||
o.m.Lock()
|
||||
defer o.m.Unlock()
|
||||
var err error
|
||||
if o.done == 0 {
|
||||
err = f()
|
||||
if err == nil {
|
||||
atomic.StoreUint32(&o.done, 1)
|
||||
}
|
||||
}
|
||||
return err
|
||||
}
|
||||
|
|
@ -0,0 +1,93 @@
|
|||
package pool
|
||||
|
||||
import (
|
||||
"net"
|
||||
"sync/atomic"
|
||||
"time"
|
||||
|
||||
"github.com/go-redis/redis/internal/proto"
|
||||
)
|
||||
|
||||
var noDeadline = time.Time{}
|
||||
|
||||
type Conn struct {
|
||||
netConn net.Conn
|
||||
|
||||
rd *proto.Reader
|
||||
rdLocked bool
|
||||
wr *proto.Writer
|
||||
|
||||
InitedAt time.Time
|
||||
pooled bool
|
||||
usedAt atomic.Value
|
||||
}
|
||||
|
||||
func NewConn(netConn net.Conn) *Conn {
|
||||
cn := &Conn{
|
||||
netConn: netConn,
|
||||
}
|
||||
cn.rd = proto.NewReader(netConn)
|
||||
cn.wr = proto.NewWriter(netConn)
|
||||
cn.SetUsedAt(time.Now())
|
||||
return cn
|
||||
}
|
||||
|
||||
func (cn *Conn) UsedAt() time.Time {
|
||||
return cn.usedAt.Load().(time.Time)
|
||||
}
|
||||
|
||||
func (cn *Conn) SetUsedAt(tm time.Time) {
|
||||
cn.usedAt.Store(tm)
|
||||
}
|
||||
|
||||
func (cn *Conn) SetNetConn(netConn net.Conn) {
|
||||
cn.netConn = netConn
|
||||
cn.rd.Reset(netConn)
|
||||
cn.wr.Reset(netConn)
|
||||
}
|
||||
|
||||
func (cn *Conn) setReadTimeout(timeout time.Duration) error {
|
||||
now := time.Now()
|
||||
cn.SetUsedAt(now)
|
||||
if timeout > 0 {
|
||||
return cn.netConn.SetReadDeadline(now.Add(timeout))
|
||||
}
|
||||
return cn.netConn.SetReadDeadline(noDeadline)
|
||||
}
|
||||
|
||||
func (cn *Conn) setWriteTimeout(timeout time.Duration) error {
|
||||
now := time.Now()
|
||||
cn.SetUsedAt(now)
|
||||
if timeout > 0 {
|
||||
return cn.netConn.SetWriteDeadline(now.Add(timeout))
|
||||
}
|
||||
return cn.netConn.SetWriteDeadline(noDeadline)
|
||||
}
|
||||
|
||||
func (cn *Conn) Write(b []byte) (int, error) {
|
||||
return cn.netConn.Write(b)
|
||||
}
|
||||
|
||||
func (cn *Conn) RemoteAddr() net.Addr {
|
||||
return cn.netConn.RemoteAddr()
|
||||
}
|
||||
|
||||
func (cn *Conn) WithReader(timeout time.Duration, fn func(rd *proto.Reader) error) error {
|
||||
_ = cn.setReadTimeout(timeout)
|
||||
return fn(cn.rd)
|
||||
}
|
||||
|
||||
func (cn *Conn) WithWriter(timeout time.Duration, fn func(wr *proto.Writer) error) error {
|
||||
_ = cn.setWriteTimeout(timeout)
|
||||
|
||||
firstErr := fn(cn.wr)
|
||||
err := cn.wr.Flush()
|
||||
if err != nil && firstErr == nil {
|
||||
firstErr = err
|
||||
}
|
||||
return firstErr
|
||||
}
|
||||
|
||||
func (cn *Conn) Close() error {
|
||||
return cn.netConn.Close()
|
||||
}
|
||||
|
|
@ -0,0 +1,476 @@
|
|||
package pool
|
||||
|
||||
import (
|
||||
"errors"
|
||||
"net"
|
||||
"sync"
|
||||
"sync/atomic"
|
||||
"time"
|
||||
|
||||
"github.com/go-redis/redis/internal"
|
||||
)
|
||||
|
||||
var ErrClosed = errors.New("redis: client is closed")
|
||||
var ErrPoolTimeout = errors.New("redis: connection pool timeout")
|
||||
|
||||
var timers = sync.Pool{
|
||||
New: func() interface{} {
|
||||
t := time.NewTimer(time.Hour)
|
||||
t.Stop()
|
||||
return t
|
||||
},
|
||||
}
|
||||
|
||||
// Stats contains pool state information and accumulated stats.
|
||||
type Stats struct {
|
||||
Hits uint32 // number of times free connection was found in the pool
|
||||
Misses uint32 // number of times free connection was NOT found in the pool
|
||||
Timeouts uint32 // number of times a wait timeout occurred
|
||||
|
||||
TotalConns uint32 // number of total connections in the pool
|
||||
IdleConns uint32 // number of idle connections in the pool
|
||||
StaleConns uint32 // number of stale connections removed from the pool
|
||||
}
|
||||
|
||||
type Pooler interface {
|
||||
NewConn() (*Conn, error)
|
||||
CloseConn(*Conn) error
|
||||
|
||||
Get() (*Conn, error)
|
||||
Put(*Conn)
|
||||
Remove(*Conn)
|
||||
|
||||
Len() int
|
||||
IdleLen() int
|
||||
Stats() *Stats
|
||||
|
||||
Close() error
|
||||
}
|
||||
|
||||
type Options struct {
|
||||
Dialer func() (net.Conn, error)
|
||||
OnClose func(*Conn) error
|
||||
|
||||
PoolSize int
|
||||
MinIdleConns int
|
||||
MaxConnAge time.Duration
|
||||
PoolTimeout time.Duration
|
||||
IdleTimeout time.Duration
|
||||
IdleCheckFrequency time.Duration
|
||||
}
|
||||
|
||||
type ConnPool struct {
|
||||
opt *Options
|
||||
|
||||
dialErrorsNum uint32 // atomic
|
||||
|
||||
lastDialErrorMu sync.RWMutex
|
||||
lastDialError error
|
||||
|
||||
queue chan struct{}
|
||||
|
||||
connsMu sync.Mutex
|
||||
conns []*Conn
|
||||
idleConns []*Conn
|
||||
poolSize int
|
||||
idleConnsLen int
|
||||
|
||||
stats Stats
|
||||
|
||||
_closed uint32 // atomic
|
||||
}
|
||||
|
||||
var _ Pooler = (*ConnPool)(nil)
|
||||
|
||||
func NewConnPool(opt *Options) *ConnPool {
|
||||
p := &ConnPool{
|
||||
opt: opt,
|
||||
|
||||
queue: make(chan struct{}, opt.PoolSize),
|
||||
conns: make([]*Conn, 0, opt.PoolSize),
|
||||
idleConns: make([]*Conn, 0, opt.PoolSize),
|
||||
}
|
||||
|
||||
for i := 0; i < opt.MinIdleConns; i++ {
|
||||
p.checkMinIdleConns()
|
||||
}
|
||||
|
||||
if opt.IdleTimeout > 0 && opt.IdleCheckFrequency > 0 {
|
||||
go p.reaper(opt.IdleCheckFrequency)
|
||||
}
|
||||
|
||||
return p
|
||||
}
|
||||
|
||||
func (p *ConnPool) checkMinIdleConns() {
|
||||
if p.opt.MinIdleConns == 0 {
|
||||
return
|
||||
}
|
||||
if p.poolSize < p.opt.PoolSize && p.idleConnsLen < p.opt.MinIdleConns {
|
||||
p.poolSize++
|
||||
p.idleConnsLen++
|
||||
go p.addIdleConn()
|
||||
}
|
||||
}
|
||||
|
||||
func (p *ConnPool) addIdleConn() {
|
||||
cn, err := p.newConn(true)
|
||||
if err != nil {
|
||||
return
|
||||
}
|
||||
|
||||
p.connsMu.Lock()
|
||||
p.conns = append(p.conns, cn)
|
||||
p.idleConns = append(p.idleConns, cn)
|
||||
p.connsMu.Unlock()
|
||||
}
|
||||
|
||||
func (p *ConnPool) NewConn() (*Conn, error) {
|
||||
return p._NewConn(false)
|
||||
}
|
||||
|
||||
func (p *ConnPool) _NewConn(pooled bool) (*Conn, error) {
|
||||
cn, err := p.newConn(pooled)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
p.connsMu.Lock()
|
||||
p.conns = append(p.conns, cn)
|
||||
if pooled {
|
||||
if p.poolSize < p.opt.PoolSize {
|
||||
p.poolSize++
|
||||
} else {
|
||||
cn.pooled = false
|
||||
}
|
||||
}
|
||||
p.connsMu.Unlock()
|
||||
return cn, nil
|
||||
}
|
||||
|
||||
func (p *ConnPool) newConn(pooled bool) (*Conn, error) {
|
||||
if p.closed() {
|
||||
return nil, ErrClosed
|
||||
}
|
||||
|
||||
if atomic.LoadUint32(&p.dialErrorsNum) >= uint32(p.opt.PoolSize) {
|
||||
return nil, p.getLastDialError()
|
||||
}
|
||||
|
||||
netConn, err := p.opt.Dialer()
|
||||
if err != nil {
|
||||
p.setLastDialError(err)
|
||||
if atomic.AddUint32(&p.dialErrorsNum, 1) == uint32(p.opt.PoolSize) {
|
||||
go p.tryDial()
|
||||
}
|
||||
return nil, err
|
||||
}
|
||||
|
||||
cn := NewConn(netConn)
|
||||
cn.pooled = pooled
|
||||
return cn, nil
|
||||
}
|
||||
|
||||
func (p *ConnPool) tryDial() {
|
||||
for {
|
||||
if p.closed() {
|
||||
return
|
||||
}
|
||||
|
||||
conn, err := p.opt.Dialer()
|
||||
if err != nil {
|
||||
p.setLastDialError(err)
|
||||
time.Sleep(time.Second)
|
||||
continue
|
||||
}
|
||||
|
||||
atomic.StoreUint32(&p.dialErrorsNum, 0)
|
||||
_ = conn.Close()
|
||||
return
|
||||
}
|
||||
}
|
||||
|
||||
func (p *ConnPool) setLastDialError(err error) {
|
||||
p.lastDialErrorMu.Lock()
|
||||
p.lastDialError = err
|
||||
p.lastDialErrorMu.Unlock()
|
||||
}
|
||||
|
||||
func (p *ConnPool) getLastDialError() error {
|
||||
p.lastDialErrorMu.RLock()
|
||||
err := p.lastDialError
|
||||
p.lastDialErrorMu.RUnlock()
|
||||
return err
|
||||
}
|
||||
|
||||
// Get returns existed connection from the pool or creates a new one.
|
||||
func (p *ConnPool) Get() (*Conn, error) {
|
||||
if p.closed() {
|
||||
return nil, ErrClosed
|
||||
}
|
||||
|
||||
err := p.waitTurn()
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
for {
|
||||
p.connsMu.Lock()
|
||||
cn := p.popIdle()
|
||||
p.connsMu.Unlock()
|
||||
|
||||
if cn == nil {
|
||||
break
|
||||
}
|
||||
|
||||
if p.isStaleConn(cn) {
|
||||
_ = p.CloseConn(cn)
|
||||
continue
|
||||
}
|
||||
|
||||
atomic.AddUint32(&p.stats.Hits, 1)
|
||||
return cn, nil
|
||||
}
|
||||
|
||||
atomic.AddUint32(&p.stats.Misses, 1)
|
||||
|
||||
newcn, err := p._NewConn(true)
|
||||
if err != nil {
|
||||
p.freeTurn()
|
||||
return nil, err
|
||||
}
|
||||
|
||||
return newcn, nil
|
||||
}
|
||||
|
||||
func (p *ConnPool) getTurn() {
|
||||
p.queue <- struct{}{}
|
||||
}
|
||||
|
||||
func (p *ConnPool) waitTurn() error {
|
||||
select {
|
||||
case p.queue <- struct{}{}:
|
||||
return nil
|
||||
default:
|
||||
timer := timers.Get().(*time.Timer)
|
||||
timer.Reset(p.opt.PoolTimeout)
|
||||
|
||||
select {
|
||||
case p.queue <- struct{}{}:
|
||||
if !timer.Stop() {
|
||||
<-timer.C
|
||||
}
|
||||
timers.Put(timer)
|
||||
return nil
|
||||
case <-timer.C:
|
||||
timers.Put(timer)
|
||||
atomic.AddUint32(&p.stats.Timeouts, 1)
|
||||
return ErrPoolTimeout
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func (p *ConnPool) freeTurn() {
|
||||
<-p.queue
|
||||
}
|
||||
|
||||
func (p *ConnPool) popIdle() *Conn {
|
||||
if len(p.idleConns) == 0 {
|
||||
return nil
|
||||
}
|
||||
|
||||
idx := len(p.idleConns) - 1
|
||||
cn := p.idleConns[idx]
|
||||
p.idleConns = p.idleConns[:idx]
|
||||
p.idleConnsLen--
|
||||
p.checkMinIdleConns()
|
||||
return cn
|
||||
}
|
||||
|
||||
func (p *ConnPool) Put(cn *Conn) {
|
||||
if !cn.pooled {
|
||||
p.Remove(cn)
|
||||
return
|
||||
}
|
||||
|
||||
p.connsMu.Lock()
|
||||
p.idleConns = append(p.idleConns, cn)
|
||||
p.idleConnsLen++
|
||||
p.connsMu.Unlock()
|
||||
p.freeTurn()
|
||||
}
|
||||
|
||||
func (p *ConnPool) Remove(cn *Conn) {
|
||||
p.removeConn(cn)
|
||||
p.freeTurn()
|
||||
_ = p.closeConn(cn)
|
||||
}
|
||||
|
||||
func (p *ConnPool) CloseConn(cn *Conn) error {
|
||||
p.removeConn(cn)
|
||||
return p.closeConn(cn)
|
||||
}
|
||||
|
||||
func (p *ConnPool) removeConn(cn *Conn) {
|
||||
p.connsMu.Lock()
|
||||
for i, c := range p.conns {
|
||||
if c == cn {
|
||||
p.conns = append(p.conns[:i], p.conns[i+1:]...)
|
||||
if cn.pooled {
|
||||
p.poolSize--
|
||||
p.checkMinIdleConns()
|
||||
}
|
||||
break
|
||||
}
|
||||
}
|
||||
p.connsMu.Unlock()
|
||||
}
|
||||
|
||||
func (p *ConnPool) closeConn(cn *Conn) error {
|
||||
if p.opt.OnClose != nil {
|
||||
_ = p.opt.OnClose(cn)
|
||||
}
|
||||
return cn.Close()
|
||||
}
|
||||
|
||||
// Len returns total number of connections.
|
||||
func (p *ConnPool) Len() int {
|
||||
p.connsMu.Lock()
|
||||
n := len(p.conns)
|
||||
p.connsMu.Unlock()
|
||||
return n
|
||||
}
|
||||
|
||||
// IdleLen returns number of idle connections.
|
||||
func (p *ConnPool) IdleLen() int {
|
||||
p.connsMu.Lock()
|
||||
n := p.idleConnsLen
|
||||
p.connsMu.Unlock()
|
||||
return n
|
||||
}
|
||||
|
||||
func (p *ConnPool) Stats() *Stats {
|
||||
idleLen := p.IdleLen()
|
||||
return &Stats{
|
||||
Hits: atomic.LoadUint32(&p.stats.Hits),
|
||||
Misses: atomic.LoadUint32(&p.stats.Misses),
|
||||
Timeouts: atomic.LoadUint32(&p.stats.Timeouts),
|
||||
|
||||
TotalConns: uint32(p.Len()),
|
||||
IdleConns: uint32(idleLen),
|
||||
StaleConns: atomic.LoadUint32(&p.stats.StaleConns),
|
||||
}
|
||||
}
|
||||
|
||||
func (p *ConnPool) closed() bool {
|
||||
return atomic.LoadUint32(&p._closed) == 1
|
||||
}
|
||||
|
||||
func (p *ConnPool) Filter(fn func(*Conn) bool) error {
|
||||
var firstErr error
|
||||
p.connsMu.Lock()
|
||||
for _, cn := range p.conns {
|
||||
if fn(cn) {
|
||||
if err := p.closeConn(cn); err != nil && firstErr == nil {
|
||||
firstErr = err
|
||||
}
|
||||
}
|
||||
}
|
||||
p.connsMu.Unlock()
|
||||
return firstErr
|
||||
}
|
||||
|
||||
func (p *ConnPool) Close() error {
|
||||
if !atomic.CompareAndSwapUint32(&p._closed, 0, 1) {
|
||||
return ErrClosed
|
||||
}
|
||||
|
||||
var firstErr error
|
||||
p.connsMu.Lock()
|
||||
for _, cn := range p.conns {
|
||||
if err := p.closeConn(cn); err != nil && firstErr == nil {
|
||||
firstErr = err
|
||||
}
|
||||
}
|
||||
p.conns = nil
|
||||
p.poolSize = 0
|
||||
p.idleConns = nil
|
||||
p.idleConnsLen = 0
|
||||
p.connsMu.Unlock()
|
||||
|
||||
return firstErr
|
||||
}
|
||||
|
||||
func (p *ConnPool) reapStaleConn() *Conn {
|
||||
if len(p.idleConns) == 0 {
|
||||
return nil
|
||||
}
|
||||
|
||||
cn := p.idleConns[0]
|
||||
if !p.isStaleConn(cn) {
|
||||
return nil
|
||||
}
|
||||
|
||||
p.idleConns = append(p.idleConns[:0], p.idleConns[1:]...)
|
||||
p.idleConnsLen--
|
||||
|
||||
return cn
|
||||
}
|
||||
|
||||
func (p *ConnPool) ReapStaleConns() (int, error) {
|
||||
var n int
|
||||
for {
|
||||
p.getTurn()
|
||||
|
||||
p.connsMu.Lock()
|
||||
cn := p.reapStaleConn()
|
||||
p.connsMu.Unlock()
|
||||
|
||||
if cn != nil {
|
||||
p.removeConn(cn)
|
||||
}
|
||||
|
||||
p.freeTurn()
|
||||
|
||||
if cn != nil {
|
||||
p.closeConn(cn)
|
||||
n++
|
||||
} else {
|
||||
break
|
||||
}
|
||||
}
|
||||
return n, nil
|
||||
}
|
||||
|
||||
func (p *ConnPool) reaper(frequency time.Duration) {
|
||||
ticker := time.NewTicker(frequency)
|
||||
defer ticker.Stop()
|
||||
|
||||
for range ticker.C {
|
||||
if p.closed() {
|
||||
break
|
||||
}
|
||||
n, err := p.ReapStaleConns()
|
||||
if err != nil {
|
||||
internal.Logf("ReapStaleConns failed: %s", err)
|
||||
continue
|
||||
}
|
||||
atomic.AddUint32(&p.stats.StaleConns, uint32(n))
|
||||
}
|
||||
}
|
||||
|
||||
func (p *ConnPool) isStaleConn(cn *Conn) bool {
|
||||
if p.opt.IdleTimeout == 0 && p.opt.MaxConnAge == 0 {
|
||||
return false
|
||||
}
|
||||
|
||||
now := time.Now()
|
||||
if p.opt.IdleTimeout > 0 && now.Sub(cn.UsedAt()) >= p.opt.IdleTimeout {
|
||||
return true
|
||||
}
|
||||
if p.opt.MaxConnAge > 0 && now.Sub(cn.InitedAt) >= p.opt.MaxConnAge {
|
||||
return true
|
||||
}
|
||||
|
||||
return false
|
||||
}
|
||||
|
|
@ -0,0 +1,53 @@
|
|||
package pool
|
||||
|
||||
type SingleConnPool struct {
|
||||
cn *Conn
|
||||
}
|
||||
|
||||
var _ Pooler = (*SingleConnPool)(nil)
|
||||
|
||||
func NewSingleConnPool(cn *Conn) *SingleConnPool {
|
||||
return &SingleConnPool{
|
||||
cn: cn,
|
||||
}
|
||||
}
|
||||
|
||||
func (p *SingleConnPool) NewConn() (*Conn, error) {
|
||||
panic("not implemented")
|
||||
}
|
||||
|
||||
func (p *SingleConnPool) CloseConn(*Conn) error {
|
||||
panic("not implemented")
|
||||
}
|
||||
|
||||
func (p *SingleConnPool) Get() (*Conn, error) {
|
||||
return p.cn, nil
|
||||
}
|
||||
|
||||
func (p *SingleConnPool) Put(cn *Conn) {
|
||||
if p.cn != cn {
|
||||
panic("p.cn != cn")
|
||||
}
|
||||
}
|
||||
|
||||
func (p *SingleConnPool) Remove(cn *Conn) {
|
||||
if p.cn != cn {
|
||||
panic("p.cn != cn")
|
||||
}
|
||||
}
|
||||
|
||||
func (p *SingleConnPool) Len() int {
|
||||
return 1
|
||||
}
|
||||
|
||||
func (p *SingleConnPool) IdleLen() int {
|
||||
return 0
|
||||
}
|
||||
|
||||
func (p *SingleConnPool) Stats() *Stats {
|
||||
return nil
|
||||
}
|
||||
|
||||
func (p *SingleConnPool) Close() error {
|
||||
return nil
|
||||
}
|
||||
|
|
@ -0,0 +1,109 @@
|
|||
package pool
|
||||
|
||||
import "sync"
|
||||
|
||||
type StickyConnPool struct {
|
||||
pool *ConnPool
|
||||
reusable bool
|
||||
|
||||
cn *Conn
|
||||
closed bool
|
||||
mu sync.Mutex
|
||||
}
|
||||
|
||||
var _ Pooler = (*StickyConnPool)(nil)
|
||||
|
||||
func NewStickyConnPool(pool *ConnPool, reusable bool) *StickyConnPool {
|
||||
return &StickyConnPool{
|
||||
pool: pool,
|
||||
reusable: reusable,
|
||||
}
|
||||
}
|
||||
|
||||
func (p *StickyConnPool) NewConn() (*Conn, error) {
|
||||
panic("not implemented")
|
||||
}
|
||||
|
||||
func (p *StickyConnPool) CloseConn(*Conn) error {
|
||||
panic("not implemented")
|
||||
}
|
||||
|
||||
func (p *StickyConnPool) Get() (*Conn, error) {
|
||||
p.mu.Lock()
|
||||
defer p.mu.Unlock()
|
||||
|
||||
if p.closed {
|
||||
return nil, ErrClosed
|
||||
}
|
||||
if p.cn != nil {
|
||||
return p.cn, nil
|
||||
}
|
||||
|
||||
cn, err := p.pool.Get()
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
p.cn = cn
|
||||
return cn, nil
|
||||
}
|
||||
|
||||
func (p *StickyConnPool) putUpstream() {
|
||||
p.pool.Put(p.cn)
|
||||
p.cn = nil
|
||||
}
|
||||
|
||||
func (p *StickyConnPool) Put(cn *Conn) {}
|
||||
|
||||
func (p *StickyConnPool) removeUpstream() {
|
||||
p.pool.Remove(p.cn)
|
||||
p.cn = nil
|
||||
}
|
||||
|
||||
func (p *StickyConnPool) Remove(cn *Conn) {
|
||||
p.removeUpstream()
|
||||
}
|
||||
|
||||
func (p *StickyConnPool) Len() int {
|
||||
p.mu.Lock()
|
||||
defer p.mu.Unlock()
|
||||
|
||||
if p.cn == nil {
|
||||
return 0
|
||||
}
|
||||
return 1
|
||||
}
|
||||
|
||||
func (p *StickyConnPool) IdleLen() int {
|
||||
p.mu.Lock()
|
||||
defer p.mu.Unlock()
|
||||
|
||||
if p.cn == nil {
|
||||
return 1
|
||||
}
|
||||
return 0
|
||||
}
|
||||
|
||||
func (p *StickyConnPool) Stats() *Stats {
|
||||
return nil
|
||||
}
|
||||
|
||||
func (p *StickyConnPool) Close() error {
|
||||
p.mu.Lock()
|
||||
defer p.mu.Unlock()
|
||||
|
||||
if p.closed {
|
||||
return ErrClosed
|
||||
}
|
||||
p.closed = true
|
||||
|
||||
if p.cn != nil {
|
||||
if p.reusable {
|
||||
p.putUpstream()
|
||||
} else {
|
||||
p.removeUpstream()
|
||||
}
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
|
|
@ -0,0 +1,290 @@
|
|||
package proto
|
||||
|
||||
import (
|
||||
"bufio"
|
||||
"fmt"
|
||||
"io"
|
||||
"strconv"
|
||||
|
||||
"github.com/go-redis/redis/internal/util"
|
||||
)
|
||||
|
||||
const (
|
||||
ErrorReply = '-'
|
||||
StatusReply = '+'
|
||||
IntReply = ':'
|
||||
StringReply = '$'
|
||||
ArrayReply = '*'
|
||||
)
|
||||
|
||||
//------------------------------------------------------------------------------
|
||||
|
||||
const Nil = RedisError("redis: nil")
|
||||
|
||||
type RedisError string
|
||||
|
||||
func (e RedisError) Error() string { return string(e) }
|
||||
|
||||
//------------------------------------------------------------------------------
|
||||
|
||||
type MultiBulkParse func(*Reader, int64) (interface{}, error)
|
||||
|
||||
type Reader struct {
|
||||
rd *bufio.Reader
|
||||
_buf []byte
|
||||
}
|
||||
|
||||
func NewReader(rd io.Reader) *Reader {
|
||||
return &Reader{
|
||||
rd: bufio.NewReader(rd),
|
||||
_buf: make([]byte, 64),
|
||||
}
|
||||
}
|
||||
|
||||
func (r *Reader) Reset(rd io.Reader) {
|
||||
r.rd.Reset(rd)
|
||||
}
|
||||
|
||||
func (r *Reader) ReadLine() ([]byte, error) {
|
||||
line, isPrefix, err := r.rd.ReadLine()
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
if isPrefix {
|
||||
return nil, bufio.ErrBufferFull
|
||||
}
|
||||
if len(line) == 0 {
|
||||
return nil, fmt.Errorf("redis: reply is empty")
|
||||
}
|
||||
if isNilReply(line) {
|
||||
return nil, Nil
|
||||
}
|
||||
return line, nil
|
||||
}
|
||||
|
||||
func (r *Reader) ReadReply(m MultiBulkParse) (interface{}, error) {
|
||||
line, err := r.ReadLine()
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
switch line[0] {
|
||||
case ErrorReply:
|
||||
return nil, ParseErrorReply(line)
|
||||
case StatusReply:
|
||||
return string(line[1:]), nil
|
||||
case IntReply:
|
||||
return util.ParseInt(line[1:], 10, 64)
|
||||
case StringReply:
|
||||
return r.readStringReply(line)
|
||||
case ArrayReply:
|
||||
n, err := parseArrayLen(line)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
return m(r, n)
|
||||
}
|
||||
return nil, fmt.Errorf("redis: can't parse %.100q", line)
|
||||
}
|
||||
|
||||
func (r *Reader) ReadIntReply() (int64, error) {
|
||||
line, err := r.ReadLine()
|
||||
if err != nil {
|
||||
return 0, err
|
||||
}
|
||||
switch line[0] {
|
||||
case ErrorReply:
|
||||
return 0, ParseErrorReply(line)
|
||||
case IntReply:
|
||||
return util.ParseInt(line[1:], 10, 64)
|
||||
default:
|
||||
return 0, fmt.Errorf("redis: can't parse int reply: %.100q", line)
|
||||
}
|
||||
}
|
||||
|
||||
func (r *Reader) ReadString() (string, error) {
|
||||
line, err := r.ReadLine()
|
||||
if err != nil {
|
||||
return "", err
|
||||
}
|
||||
switch line[0] {
|
||||
case ErrorReply:
|
||||
return "", ParseErrorReply(line)
|
||||
case StringReply:
|
||||
return r.readStringReply(line)
|
||||
case StatusReply:
|
||||
return string(line[1:]), nil
|
||||
case IntReply:
|
||||
return string(line[1:]), nil
|
||||
default:
|
||||
return "", fmt.Errorf("redis: can't parse reply=%.100q reading string", line)
|
||||
}
|
||||
}
|
||||
|
||||
func (r *Reader) readStringReply(line []byte) (string, error) {
|
||||
if isNilReply(line) {
|
||||
return "", Nil
|
||||
}
|
||||
|
||||
replyLen, err := strconv.Atoi(string(line[1:]))
|
||||
if err != nil {
|
||||
return "", err
|
||||
}
|
||||
|
||||
b := make([]byte, replyLen+2)
|
||||
_, err = io.ReadFull(r.rd, b)
|
||||
if err != nil {
|
||||
return "", err
|
||||
}
|
||||
|
||||
return util.BytesToString(b[:replyLen]), nil
|
||||
}
|
||||
|
||||
func (r *Reader) ReadArrayReply(m MultiBulkParse) (interface{}, error) {
|
||||
line, err := r.ReadLine()
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
switch line[0] {
|
||||
case ErrorReply:
|
||||
return nil, ParseErrorReply(line)
|
||||
case ArrayReply:
|
||||
n, err := parseArrayLen(line)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
return m(r, n)
|
||||
default:
|
||||
return nil, fmt.Errorf("redis: can't parse array reply: %.100q", line)
|
||||
}
|
||||
}
|
||||
|
||||
func (r *Reader) ReadArrayLen() (int64, error) {
|
||||
line, err := r.ReadLine()
|
||||
if err != nil {
|
||||
return 0, err
|
||||
}
|
||||
switch line[0] {
|
||||
case ErrorReply:
|
||||
return 0, ParseErrorReply(line)
|
||||
case ArrayReply:
|
||||
return parseArrayLen(line)
|
||||
default:
|
||||
return 0, fmt.Errorf("redis: can't parse array reply: %.100q", line)
|
||||
}
|
||||
}
|
||||
|
||||
func (r *Reader) ReadScanReply() ([]string, uint64, error) {
|
||||
n, err := r.ReadArrayLen()
|
||||
if err != nil {
|
||||
return nil, 0, err
|
||||
}
|
||||
if n != 2 {
|
||||
return nil, 0, fmt.Errorf("redis: got %d elements in scan reply, expected 2", n)
|
||||
}
|
||||
|
||||
cursor, err := r.ReadUint()
|
||||
if err != nil {
|
||||
return nil, 0, err
|
||||
}
|
||||
|
||||
n, err = r.ReadArrayLen()
|
||||
if err != nil {
|
||||
return nil, 0, err
|
||||
}
|
||||
|
||||
keys := make([]string, n)
|
||||
for i := int64(0); i < n; i++ {
|
||||
key, err := r.ReadString()
|
||||
if err != nil {
|
||||
return nil, 0, err
|
||||
}
|
||||
keys[i] = key
|
||||
}
|
||||
|
||||
return keys, cursor, err
|
||||
}
|
||||
|
||||
func (r *Reader) ReadInt() (int64, error) {
|
||||
b, err := r.readTmpBytesReply()
|
||||
if err != nil {
|
||||
return 0, err
|
||||
}
|
||||
return util.ParseInt(b, 10, 64)
|
||||
}
|
||||
|
||||
func (r *Reader) ReadUint() (uint64, error) {
|
||||
b, err := r.readTmpBytesReply()
|
||||
if err != nil {
|
||||
return 0, err
|
||||
}
|
||||
return util.ParseUint(b, 10, 64)
|
||||
}
|
||||
|
||||
func (r *Reader) ReadFloatReply() (float64, error) {
|
||||
b, err := r.readTmpBytesReply()
|
||||
if err != nil {
|
||||
return 0, err
|
||||
}
|
||||
return util.ParseFloat(b, 64)
|
||||
}
|
||||
|
||||
func (r *Reader) readTmpBytesReply() ([]byte, error) {
|
||||
line, err := r.ReadLine()
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
switch line[0] {
|
||||
case ErrorReply:
|
||||
return nil, ParseErrorReply(line)
|
||||
case StringReply:
|
||||
return r._readTmpBytesReply(line)
|
||||
case StatusReply:
|
||||
return line[1:], nil
|
||||
default:
|
||||
return nil, fmt.Errorf("redis: can't parse string reply: %.100q", line)
|
||||
}
|
||||
}
|
||||
|
||||
func (r *Reader) _readTmpBytesReply(line []byte) ([]byte, error) {
|
||||
if isNilReply(line) {
|
||||
return nil, Nil
|
||||
}
|
||||
|
||||
replyLen, err := strconv.Atoi(string(line[1:]))
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
buf := r.buf(replyLen + 2)
|
||||
_, err = io.ReadFull(r.rd, buf)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
return buf[:replyLen], nil
|
||||
}
|
||||
|
||||
func (r *Reader) buf(n int) []byte {
|
||||
if d := n - cap(r._buf); d > 0 {
|
||||
r._buf = append(r._buf, make([]byte, d)...)
|
||||
}
|
||||
return r._buf[:n]
|
||||
}
|
||||
|
||||
func isNilReply(b []byte) bool {
|
||||
return len(b) == 3 &&
|
||||
(b[0] == StringReply || b[0] == ArrayReply) &&
|
||||
b[1] == '-' && b[2] == '1'
|
||||
}
|
||||
|
||||
func ParseErrorReply(line []byte) error {
|
||||
return RedisError(string(line[1:]))
|
||||
}
|
||||
|
||||
func parseArrayLen(line []byte) (int64, error) {
|
||||
if isNilReply(line) {
|
||||
return 0, Nil
|
||||
}
|
||||
return util.ParseInt(line[1:], 10, 64)
|
||||
}
|
||||
|
|
@ -0,0 +1,166 @@
|
|||
package proto
|
||||
|
||||
import (
|
||||
"encoding"
|
||||
"fmt"
|
||||
"reflect"
|
||||
|
||||
"github.com/go-redis/redis/internal/util"
|
||||
)
|
||||
|
||||
func Scan(b []byte, v interface{}) error {
|
||||
switch v := v.(type) {
|
||||
case nil:
|
||||
return fmt.Errorf("redis: Scan(nil)")
|
||||
case *string:
|
||||
*v = util.BytesToString(b)
|
||||
return nil
|
||||
case *[]byte:
|
||||
*v = b
|
||||
return nil
|
||||
case *int:
|
||||
var err error
|
||||
*v, err = util.Atoi(b)
|
||||
return err
|
||||
case *int8:
|
||||
n, err := util.ParseInt(b, 10, 8)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
*v = int8(n)
|
||||
return nil
|
||||
case *int16:
|
||||
n, err := util.ParseInt(b, 10, 16)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
*v = int16(n)
|
||||
return nil
|
||||
case *int32:
|
||||
n, err := util.ParseInt(b, 10, 32)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
*v = int32(n)
|
||||
return nil
|
||||
case *int64:
|
||||
n, err := util.ParseInt(b, 10, 64)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
*v = n
|
||||
return nil
|
||||
case *uint:
|
||||
n, err := util.ParseUint(b, 10, 64)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
*v = uint(n)
|
||||
return nil
|
||||
case *uint8:
|
||||
n, err := util.ParseUint(b, 10, 8)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
*v = uint8(n)
|
||||
return nil
|
||||
case *uint16:
|
||||
n, err := util.ParseUint(b, 10, 16)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
*v = uint16(n)
|
||||
return nil
|
||||
case *uint32:
|
||||
n, err := util.ParseUint(b, 10, 32)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
*v = uint32(n)
|
||||
return nil
|
||||
case *uint64:
|
||||
n, err := util.ParseUint(b, 10, 64)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
*v = n
|
||||
return nil
|
||||
case *float32:
|
||||
n, err := util.ParseFloat(b, 32)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
*v = float32(n)
|
||||
return err
|
||||
case *float64:
|
||||
var err error
|
||||
*v, err = util.ParseFloat(b, 64)
|
||||
return err
|
||||
case *bool:
|
||||
*v = len(b) == 1 && b[0] == '1'
|
||||
return nil
|
||||
case encoding.BinaryUnmarshaler:
|
||||
return v.UnmarshalBinary(b)
|
||||
default:
|
||||
return fmt.Errorf(
|
||||
"redis: can't unmarshal %T (consider implementing BinaryUnmarshaler)", v)
|
||||
}
|
||||
}
|
||||
|
||||
func ScanSlice(data []string, slice interface{}) error {
|
||||
v := reflect.ValueOf(slice)
|
||||
if !v.IsValid() {
|
||||
return fmt.Errorf("redis: ScanSlice(nil)")
|
||||
}
|
||||
if v.Kind() != reflect.Ptr {
|
||||
return fmt.Errorf("redis: ScanSlice(non-pointer %T)", slice)
|
||||
}
|
||||
v = v.Elem()
|
||||
if v.Kind() != reflect.Slice {
|
||||
return fmt.Errorf("redis: ScanSlice(non-slice %T)", slice)
|
||||
}
|
||||
|
||||
next := makeSliceNextElemFunc(v)
|
||||
for i, s := range data {
|
||||
elem := next()
|
||||
if err := Scan([]byte(s), elem.Addr().Interface()); err != nil {
|
||||
err = fmt.Errorf("redis: ScanSlice index=%d value=%q failed: %s", i, s, err)
|
||||
return err
|
||||
}
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
func makeSliceNextElemFunc(v reflect.Value) func() reflect.Value {
|
||||
elemType := v.Type().Elem()
|
||||
|
||||
if elemType.Kind() == reflect.Ptr {
|
||||
elemType = elemType.Elem()
|
||||
return func() reflect.Value {
|
||||
if v.Len() < v.Cap() {
|
||||
v.Set(v.Slice(0, v.Len()+1))
|
||||
elem := v.Index(v.Len() - 1)
|
||||
if elem.IsNil() {
|
||||
elem.Set(reflect.New(elemType))
|
||||
}
|
||||
return elem.Elem()
|
||||
}
|
||||
|
||||
elem := reflect.New(elemType)
|
||||
v.Set(reflect.Append(v, elem))
|
||||
return elem.Elem()
|
||||
}
|
||||
}
|
||||
|
||||
zero := reflect.Zero(elemType)
|
||||
return func() reflect.Value {
|
||||
if v.Len() < v.Cap() {
|
||||
v.Set(v.Slice(0, v.Len()+1))
|
||||
return v.Index(v.Len() - 1)
|
||||
}
|
||||
|
||||
v.Set(reflect.Append(v, zero))
|
||||
return v.Index(v.Len() - 1)
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,159 @@
|
|||
package proto
|
||||
|
||||
import (
|
||||
"bufio"
|
||||
"encoding"
|
||||
"fmt"
|
||||
"io"
|
||||
"strconv"
|
||||
|
||||
"github.com/go-redis/redis/internal/util"
|
||||
)
|
||||
|
||||
type Writer struct {
|
||||
wr *bufio.Writer
|
||||
|
||||
lenBuf []byte
|
||||
numBuf []byte
|
||||
}
|
||||
|
||||
func NewWriter(wr io.Writer) *Writer {
|
||||
return &Writer{
|
||||
wr: bufio.NewWriter(wr),
|
||||
|
||||
lenBuf: make([]byte, 64),
|
||||
numBuf: make([]byte, 64),
|
||||
}
|
||||
}
|
||||
|
||||
func (w *Writer) WriteArgs(args []interface{}) error {
|
||||
err := w.wr.WriteByte(ArrayReply)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
err = w.writeLen(len(args))
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
for _, arg := range args {
|
||||
err := w.writeArg(arg)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
func (w *Writer) writeLen(n int) error {
|
||||
w.lenBuf = strconv.AppendUint(w.lenBuf[:0], uint64(n), 10)
|
||||
w.lenBuf = append(w.lenBuf, '\r', '\n')
|
||||
_, err := w.wr.Write(w.lenBuf)
|
||||
return err
|
||||
}
|
||||
|
||||
func (w *Writer) writeArg(v interface{}) error {
|
||||
switch v := v.(type) {
|
||||
case nil:
|
||||
return w.string("")
|
||||
case string:
|
||||
return w.string(v)
|
||||
case []byte:
|
||||
return w.bytes(v)
|
||||
case int:
|
||||
return w.int(int64(v))
|
||||
case int8:
|
||||
return w.int(int64(v))
|
||||
case int16:
|
||||
return w.int(int64(v))
|
||||
case int32:
|
||||
return w.int(int64(v))
|
||||
case int64:
|
||||
return w.int(v)
|
||||
case uint:
|
||||
return w.uint(uint64(v))
|
||||
case uint8:
|
||||
return w.uint(uint64(v))
|
||||
case uint16:
|
||||
return w.uint(uint64(v))
|
||||
case uint32:
|
||||
return w.uint(uint64(v))
|
||||
case uint64:
|
||||
return w.uint(v)
|
||||
case float32:
|
||||
return w.float(float64(v))
|
||||
case float64:
|
||||
return w.float(v)
|
||||
case bool:
|
||||
if v {
|
||||
return w.int(1)
|
||||
} else {
|
||||
return w.int(0)
|
||||
}
|
||||
case encoding.BinaryMarshaler:
|
||||
b, err := v.MarshalBinary()
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
return w.bytes(b)
|
||||
default:
|
||||
return fmt.Errorf(
|
||||
"redis: can't marshal %T (implement encoding.BinaryMarshaler)", v)
|
||||
}
|
||||
}
|
||||
|
||||
func (w *Writer) bytes(b []byte) error {
|
||||
err := w.wr.WriteByte(StringReply)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
err = w.writeLen(len(b))
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
_, err = w.wr.Write(b)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
return w.crlf()
|
||||
}
|
||||
|
||||
func (w *Writer) string(s string) error {
|
||||
return w.bytes(util.StringToBytes(s))
|
||||
}
|
||||
|
||||
func (w *Writer) uint(n uint64) error {
|
||||
w.numBuf = strconv.AppendUint(w.numBuf[:0], n, 10)
|
||||
return w.bytes(w.numBuf)
|
||||
}
|
||||
|
||||
func (w *Writer) int(n int64) error {
|
||||
w.numBuf = strconv.AppendInt(w.numBuf[:0], n, 10)
|
||||
return w.bytes(w.numBuf)
|
||||
}
|
||||
|
||||
func (w *Writer) float(f float64) error {
|
||||
w.numBuf = strconv.AppendFloat(w.numBuf[:0], f, 'f', -1, 64)
|
||||
return w.bytes(w.numBuf)
|
||||
}
|
||||
|
||||
func (w *Writer) crlf() error {
|
||||
err := w.wr.WriteByte('\r')
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
return w.wr.WriteByte('\n')
|
||||
}
|
||||
|
||||
func (w *Writer) Reset(wr io.Writer) {
|
||||
w.wr.Reset(wr)
|
||||
}
|
||||
|
||||
func (w *Writer) Flush() error {
|
||||
return w.wr.Flush()
|
||||
}
|
||||
|
|
@ -0,0 +1,29 @@
|
|||
package internal
|
||||
|
||||
import "github.com/go-redis/redis/internal/util"
|
||||
|
||||
func ToLower(s string) string {
|
||||
if isLower(s) {
|
||||
return s
|
||||
}
|
||||
|
||||
b := make([]byte, len(s))
|
||||
for i := range b {
|
||||
c := s[i]
|
||||
if c >= 'A' && c <= 'Z' {
|
||||
c += 'a' - 'A'
|
||||
}
|
||||
b[i] = c
|
||||
}
|
||||
return util.BytesToString(b)
|
||||
}
|
||||
|
||||
func isLower(s string) bool {
|
||||
for i := 0; i < len(s); i++ {
|
||||
c := s[i]
|
||||
if c >= 'A' && c <= 'Z' {
|
||||
return false
|
||||
}
|
||||
}
|
||||
return true
|
||||
}
|
||||
|
|
@ -0,0 +1,11 @@
|
|||
// +build appengine
|
||||
|
||||
package util
|
||||
|
||||
func BytesToString(b []byte) string {
|
||||
return string(b)
|
||||
}
|
||||
|
||||
func StringToBytes(s string) []byte {
|
||||
return []byte(s)
|
||||
}
|
||||
|
|
@ -0,0 +1,19 @@
|
|||
package util
|
||||
|
||||
import "strconv"
|
||||
|
||||
func Atoi(b []byte) (int, error) {
|
||||
return strconv.Atoi(BytesToString(b))
|
||||
}
|
||||
|
||||
func ParseInt(b []byte, base int, bitSize int) (int64, error) {
|
||||
return strconv.ParseInt(BytesToString(b), base, bitSize)
|
||||
}
|
||||
|
||||
func ParseUint(b []byte, base int, bitSize int) (uint64, error) {
|
||||
return strconv.ParseUint(BytesToString(b), base, bitSize)
|
||||
}
|
||||
|
||||
func ParseFloat(b []byte, bitSize int) (float64, error) {
|
||||
return strconv.ParseFloat(BytesToString(b), bitSize)
|
||||
}
|
||||
|
|
@ -0,0 +1,22 @@
|
|||
// +build !appengine
|
||||
|
||||
package util
|
||||
|
||||
import (
|
||||
"unsafe"
|
||||
)
|
||||
|
||||
// BytesToString converts byte slice to string.
|
||||
func BytesToString(b []byte) string {
|
||||
return *(*string)(unsafe.Pointer(&b))
|
||||
}
|
||||
|
||||
// StringToBytes converts string to byte slice.
|
||||
func StringToBytes(s string) []byte {
|
||||
return *(*[]byte)(unsafe.Pointer(
|
||||
&struct {
|
||||
string
|
||||
Cap int
|
||||
}{s, len(s)},
|
||||
))
|
||||
}
|
||||
|
|
@ -0,0 +1,73 @@
|
|||
package redis
|
||||
|
||||
import "sync"
|
||||
|
||||
// ScanIterator is used to incrementally iterate over a collection of elements.
|
||||
// It's safe for concurrent use by multiple goroutines.
|
||||
type ScanIterator struct {
|
||||
mu sync.Mutex // protects Scanner and pos
|
||||
cmd *ScanCmd
|
||||
pos int
|
||||
}
|
||||
|
||||
// Err returns the last iterator error, if any.
|
||||
func (it *ScanIterator) Err() error {
|
||||
it.mu.Lock()
|
||||
err := it.cmd.Err()
|
||||
it.mu.Unlock()
|
||||
return err
|
||||
}
|
||||
|
||||
// Next advances the cursor and returns true if more values can be read.
|
||||
func (it *ScanIterator) Next() bool {
|
||||
it.mu.Lock()
|
||||
defer it.mu.Unlock()
|
||||
|
||||
// Instantly return on errors.
|
||||
if it.cmd.Err() != nil {
|
||||
return false
|
||||
}
|
||||
|
||||
// Advance cursor, check if we are still within range.
|
||||
if it.pos < len(it.cmd.page) {
|
||||
it.pos++
|
||||
return true
|
||||
}
|
||||
|
||||
for {
|
||||
// Return if there is no more data to fetch.
|
||||
if it.cmd.cursor == 0 {
|
||||
return false
|
||||
}
|
||||
|
||||
// Fetch next page.
|
||||
if it.cmd._args[0] == "scan" {
|
||||
it.cmd._args[1] = it.cmd.cursor
|
||||
} else {
|
||||
it.cmd._args[2] = it.cmd.cursor
|
||||
}
|
||||
|
||||
err := it.cmd.process(it.cmd)
|
||||
if err != nil {
|
||||
return false
|
||||
}
|
||||
|
||||
it.pos = 1
|
||||
|
||||
// Redis can occasionally return empty page.
|
||||
if len(it.cmd.page) > 0 {
|
||||
return true
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Val returns the key/field at the current cursor position.
|
||||
func (it *ScanIterator) Val() string {
|
||||
var v string
|
||||
it.mu.Lock()
|
||||
if it.cmd.Err() == nil && it.pos > 0 && it.pos <= len(it.cmd.page) {
|
||||
v = it.cmd.page[it.pos-1]
|
||||
}
|
||||
it.mu.Unlock()
|
||||
return v
|
||||
}
|
||||
|
|
@ -0,0 +1,226 @@
|
|||
package redis
|
||||
|
||||
import (
|
||||
"crypto/tls"
|
||||
"errors"
|
||||
"fmt"
|
||||
"net"
|
||||
"net/url"
|
||||
"runtime"
|
||||
"strconv"
|
||||
"strings"
|
||||
"time"
|
||||
|
||||
"github.com/go-redis/redis/internal/pool"
|
||||
)
|
||||
|
||||
// Limiter is the interface of a rate limiter or a circuit breaker.
|
||||
type Limiter interface {
|
||||
// Allow returns a nil if operation is allowed or an error otherwise.
|
||||
// If operation is allowed client must report the result of operation
|
||||
// whether is a success or a failure.
|
||||
Allow() error
|
||||
// ReportResult reports the result of previously allowed operation.
|
||||
// nil indicates a success, non-nil error indicates a failure.
|
||||
ReportResult(result error)
|
||||
}
|
||||
|
||||
type Options struct {
|
||||
// The network type, either tcp or unix.
|
||||
// Default is tcp.
|
||||
Network string
|
||||
// host:port address.
|
||||
Addr string
|
||||
|
||||
// Dialer creates new network connection and has priority over
|
||||
// Network and Addr options.
|
||||
Dialer func() (net.Conn, error)
|
||||
|
||||
// Hook that is called when new connection is established.
|
||||
OnConnect func(*Conn) error
|
||||
|
||||
// Optional password. Must match the password specified in the
|
||||
// requirepass server configuration option.
|
||||
Password string
|
||||
// Database to be selected after connecting to the server.
|
||||
DB int
|
||||
|
||||
// Maximum number of retries before giving up.
|
||||
// Default is to not retry failed commands.
|
||||
MaxRetries int
|
||||
// Minimum backoff between each retry.
|
||||
// Default is 8 milliseconds; -1 disables backoff.
|
||||
MinRetryBackoff time.Duration
|
||||
// Maximum backoff between each retry.
|
||||
// Default is 512 milliseconds; -1 disables backoff.
|
||||
MaxRetryBackoff time.Duration
|
||||
|
||||
// Dial timeout for establishing new connections.
|
||||
// Default is 5 seconds.
|
||||
DialTimeout time.Duration
|
||||
// Timeout for socket reads. If reached, commands will fail
|
||||
// with a timeout instead of blocking. Use value -1 for no timeout and 0 for default.
|
||||
// Default is 3 seconds.
|
||||
ReadTimeout time.Duration
|
||||
// Timeout for socket writes. If reached, commands will fail
|
||||
// with a timeout instead of blocking.
|
||||
// Default is ReadTimeout.
|
||||
WriteTimeout time.Duration
|
||||
|
||||
// Maximum number of socket connections.
|
||||
// Default is 10 connections per every CPU as reported by runtime.NumCPU.
|
||||
PoolSize int
|
||||
// Minimum number of idle connections which is useful when establishing
|
||||
// new connection is slow.
|
||||
MinIdleConns int
|
||||
// Connection age at which client retires (closes) the connection.
|
||||
// Default is to not close aged connections.
|
||||
MaxConnAge time.Duration
|
||||
// Amount of time client waits for connection if all connections
|
||||
// are busy before returning an error.
|
||||
// Default is ReadTimeout + 1 second.
|
||||
PoolTimeout time.Duration
|
||||
// Amount of time after which client closes idle connections.
|
||||
// Should be less than server's timeout.
|
||||
// Default is 5 minutes. -1 disables idle timeout check.
|
||||
IdleTimeout time.Duration
|
||||
// Frequency of idle checks made by idle connections reaper.
|
||||
// Default is 1 minute. -1 disables idle connections reaper,
|
||||
// but idle connections are still discarded by the client
|
||||
// if IdleTimeout is set.
|
||||
IdleCheckFrequency time.Duration
|
||||
|
||||
// Enables read only queries on slave nodes.
|
||||
readOnly bool
|
||||
|
||||
// TLS Config to use. When set TLS will be negotiated.
|
||||
TLSConfig *tls.Config
|
||||
}
|
||||
|
||||
func (opt *Options) init() {
|
||||
if opt.Network == "" {
|
||||
opt.Network = "tcp"
|
||||
}
|
||||
if opt.Addr == "" {
|
||||
opt.Addr = "localhost:6379"
|
||||
}
|
||||
if opt.Dialer == nil {
|
||||
opt.Dialer = func() (net.Conn, error) {
|
||||
netDialer := &net.Dialer{
|
||||
Timeout: opt.DialTimeout,
|
||||
KeepAlive: 5 * time.Minute,
|
||||
}
|
||||
if opt.TLSConfig == nil {
|
||||
return netDialer.Dial(opt.Network, opt.Addr)
|
||||
} else {
|
||||
return tls.DialWithDialer(netDialer, opt.Network, opt.Addr, opt.TLSConfig)
|
||||
}
|
||||
}
|
||||
}
|
||||
if opt.PoolSize == 0 {
|
||||
opt.PoolSize = 10 * runtime.NumCPU()
|
||||
}
|
||||
if opt.DialTimeout == 0 {
|
||||
opt.DialTimeout = 5 * time.Second
|
||||
}
|
||||
switch opt.ReadTimeout {
|
||||
case -1:
|
||||
opt.ReadTimeout = 0
|
||||
case 0:
|
||||
opt.ReadTimeout = 3 * time.Second
|
||||
}
|
||||
switch opt.WriteTimeout {
|
||||
case -1:
|
||||
opt.WriteTimeout = 0
|
||||
case 0:
|
||||
opt.WriteTimeout = opt.ReadTimeout
|
||||
}
|
||||
if opt.PoolTimeout == 0 {
|
||||
opt.PoolTimeout = opt.ReadTimeout + time.Second
|
||||
}
|
||||
if opt.IdleTimeout == 0 {
|
||||
opt.IdleTimeout = 5 * time.Minute
|
||||
}
|
||||
if opt.IdleCheckFrequency == 0 {
|
||||
opt.IdleCheckFrequency = time.Minute
|
||||
}
|
||||
|
||||
switch opt.MinRetryBackoff {
|
||||
case -1:
|
||||
opt.MinRetryBackoff = 0
|
||||
case 0:
|
||||
opt.MinRetryBackoff = 8 * time.Millisecond
|
||||
}
|
||||
switch opt.MaxRetryBackoff {
|
||||
case -1:
|
||||
opt.MaxRetryBackoff = 0
|
||||
case 0:
|
||||
opt.MaxRetryBackoff = 512 * time.Millisecond
|
||||
}
|
||||
}
|
||||
|
||||
// ParseURL parses an URL into Options that can be used to connect to Redis.
|
||||
func ParseURL(redisURL string) (*Options, error) {
|
||||
o := &Options{Network: "tcp"}
|
||||
u, err := url.Parse(redisURL)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
if u.Scheme != "redis" && u.Scheme != "rediss" {
|
||||
return nil, errors.New("invalid redis URL scheme: " + u.Scheme)
|
||||
}
|
||||
|
||||
if u.User != nil {
|
||||
if p, ok := u.User.Password(); ok {
|
||||
o.Password = p
|
||||
}
|
||||
}
|
||||
|
||||
if len(u.Query()) > 0 {
|
||||
return nil, errors.New("no options supported")
|
||||
}
|
||||
|
||||
h, p, err := net.SplitHostPort(u.Host)
|
||||
if err != nil {
|
||||
h = u.Host
|
||||
}
|
||||
if h == "" {
|
||||
h = "localhost"
|
||||
}
|
||||
if p == "" {
|
||||
p = "6379"
|
||||
}
|
||||
o.Addr = net.JoinHostPort(h, p)
|
||||
|
||||
f := strings.FieldsFunc(u.Path, func(r rune) bool {
|
||||
return r == '/'
|
||||
})
|
||||
switch len(f) {
|
||||
case 0:
|
||||
o.DB = 0
|
||||
case 1:
|
||||
if o.DB, err = strconv.Atoi(f[0]); err != nil {
|
||||
return nil, fmt.Errorf("invalid redis database number: %q", f[0])
|
||||
}
|
||||
default:
|
||||
return nil, errors.New("invalid redis URL path: " + u.Path)
|
||||
}
|
||||
|
||||
if u.Scheme == "rediss" {
|
||||
o.TLSConfig = &tls.Config{ServerName: h}
|
||||
}
|
||||
return o, nil
|
||||
}
|
||||
|
||||
func newConnPool(opt *Options) *pool.ConnPool {
|
||||
return pool.NewConnPool(&pool.Options{
|
||||
Dialer: opt.Dialer,
|
||||
PoolSize: opt.PoolSize,
|
||||
MinIdleConns: opt.MinIdleConns,
|
||||
MaxConnAge: opt.MaxConnAge,
|
||||
PoolTimeout: opt.PoolTimeout,
|
||||
IdleTimeout: opt.IdleTimeout,
|
||||
IdleCheckFrequency: opt.IdleCheckFrequency,
|
||||
})
|
||||
}
|
||||
|
|
@ -0,0 +1,120 @@
|
|||
package redis
|
||||
|
||||
import (
|
||||
"sync"
|
||||
|
||||
"github.com/go-redis/redis/internal/pool"
|
||||
)
|
||||
|
||||
type pipelineExecer func([]Cmder) error
|
||||
|
||||
type Pipeliner interface {
|
||||
StatefulCmdable
|
||||
Do(args ...interface{}) *Cmd
|
||||
Process(cmd Cmder) error
|
||||
Close() error
|
||||
Discard() error
|
||||
Exec() ([]Cmder, error)
|
||||
}
|
||||
|
||||
var _ Pipeliner = (*Pipeline)(nil)
|
||||
|
||||
// Pipeline implements pipelining as described in
|
||||
// http://redis.io/topics/pipelining. It's safe for concurrent use
|
||||
// by multiple goroutines.
|
||||
type Pipeline struct {
|
||||
statefulCmdable
|
||||
|
||||
exec pipelineExecer
|
||||
|
||||
mu sync.Mutex
|
||||
cmds []Cmder
|
||||
closed bool
|
||||
}
|
||||
|
||||
func (c *Pipeline) Do(args ...interface{}) *Cmd {
|
||||
cmd := NewCmd(args...)
|
||||
_ = c.Process(cmd)
|
||||
return cmd
|
||||
}
|
||||
|
||||
// Process queues the cmd for later execution.
|
||||
func (c *Pipeline) Process(cmd Cmder) error {
|
||||
c.mu.Lock()
|
||||
c.cmds = append(c.cmds, cmd)
|
||||
c.mu.Unlock()
|
||||
return nil
|
||||
}
|
||||
|
||||
// Close closes the pipeline, releasing any open resources.
|
||||
func (c *Pipeline) Close() error {
|
||||
c.mu.Lock()
|
||||
c.discard()
|
||||
c.closed = true
|
||||
c.mu.Unlock()
|
||||
return nil
|
||||
}
|
||||
|
||||
// Discard resets the pipeline and discards queued commands.
|
||||
func (c *Pipeline) Discard() error {
|
||||
c.mu.Lock()
|
||||
err := c.discard()
|
||||
c.mu.Unlock()
|
||||
return err
|
||||
}
|
||||
|
||||
func (c *Pipeline) discard() error {
|
||||
if c.closed {
|
||||
return pool.ErrClosed
|
||||
}
|
||||
c.cmds = c.cmds[:0]
|
||||
return nil
|
||||
}
|
||||
|
||||
// Exec executes all previously queued commands using one
|
||||
// client-server roundtrip.
|
||||
//
|
||||
// Exec always returns list of commands and error of the first failed
|
||||
// command if any.
|
||||
func (c *Pipeline) Exec() ([]Cmder, error) {
|
||||
c.mu.Lock()
|
||||
defer c.mu.Unlock()
|
||||
|
||||
if c.closed {
|
||||
return nil, pool.ErrClosed
|
||||
}
|
||||
|
||||
if len(c.cmds) == 0 {
|
||||
return nil, nil
|
||||
}
|
||||
|
||||
cmds := c.cmds
|
||||
c.cmds = nil
|
||||
|
||||
return cmds, c.exec(cmds)
|
||||
}
|
||||
|
||||
func (c *Pipeline) pipelined(fn func(Pipeliner) error) ([]Cmder, error) {
|
||||
if err := fn(c); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
cmds, err := c.Exec()
|
||||
_ = c.Close()
|
||||
return cmds, err
|
||||
}
|
||||
|
||||
func (c *Pipeline) Pipelined(fn func(Pipeliner) error) ([]Cmder, error) {
|
||||
return c.pipelined(fn)
|
||||
}
|
||||
|
||||
func (c *Pipeline) Pipeline() Pipeliner {
|
||||
return c
|
||||
}
|
||||
|
||||
func (c *Pipeline) TxPipelined(fn func(Pipeliner) error) ([]Cmder, error) {
|
||||
return c.pipelined(fn)
|
||||
}
|
||||
|
||||
func (c *Pipeline) TxPipeline() Pipeliner {
|
||||
return c
|
||||
}
|
||||
|
|
@ -0,0 +1,473 @@
|
|||
package redis
|
||||
|
||||
import (
|
||||
"errors"
|
||||
"fmt"
|
||||
"sync"
|
||||
"time"
|
||||
|
||||
"github.com/go-redis/redis/internal"
|
||||
"github.com/go-redis/redis/internal/pool"
|
||||
"github.com/go-redis/redis/internal/proto"
|
||||
)
|
||||
|
||||
var errPingTimeout = errors.New("redis: ping timeout")
|
||||
|
||||
// PubSub implements Pub/Sub commands bas described in
|
||||
// http://redis.io/topics/pubsub. Message receiving is NOT safe
|
||||
// for concurrent use by multiple goroutines.
|
||||
//
|
||||
// PubSub automatically reconnects to Redis Server and resubscribes
|
||||
// to the channels in case of network errors.
|
||||
type PubSub struct {
|
||||
opt *Options
|
||||
|
||||
newConn func([]string) (*pool.Conn, error)
|
||||
closeConn func(*pool.Conn) error
|
||||
|
||||
mu sync.Mutex
|
||||
cn *pool.Conn
|
||||
channels map[string]struct{}
|
||||
patterns map[string]struct{}
|
||||
closed bool
|
||||
exit chan struct{}
|
||||
|
||||
cmd *Cmd
|
||||
|
||||
chOnce sync.Once
|
||||
ch chan *Message
|
||||
ping chan struct{}
|
||||
}
|
||||
|
||||
func (c *PubSub) init() {
|
||||
c.exit = make(chan struct{})
|
||||
}
|
||||
|
||||
func (c *PubSub) conn() (*pool.Conn, error) {
|
||||
c.mu.Lock()
|
||||
cn, err := c._conn(nil)
|
||||
c.mu.Unlock()
|
||||
return cn, err
|
||||
}
|
||||
|
||||
func (c *PubSub) _conn(newChannels []string) (*pool.Conn, error) {
|
||||
if c.closed {
|
||||
return nil, pool.ErrClosed
|
||||
}
|
||||
if c.cn != nil {
|
||||
return c.cn, nil
|
||||
}
|
||||
|
||||
channels := mapKeys(c.channels)
|
||||
channels = append(channels, newChannels...)
|
||||
|
||||
cn, err := c.newConn(channels)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
if err := c.resubscribe(cn); err != nil {
|
||||
_ = c.closeConn(cn)
|
||||
return nil, err
|
||||
}
|
||||
|
||||
c.cn = cn
|
||||
return cn, nil
|
||||
}
|
||||
|
||||
func (c *PubSub) writeCmd(cn *pool.Conn, cmd Cmder) error {
|
||||
return cn.WithWriter(c.opt.WriteTimeout, func(wr *proto.Writer) error {
|
||||
return writeCmd(wr, cmd)
|
||||
})
|
||||
}
|
||||
|
||||
func (c *PubSub) resubscribe(cn *pool.Conn) error {
|
||||
var firstErr error
|
||||
|
||||
if len(c.channels) > 0 {
|
||||
err := c._subscribe(cn, "subscribe", mapKeys(c.channels))
|
||||
if err != nil && firstErr == nil {
|
||||
firstErr = err
|
||||
}
|
||||
}
|
||||
|
||||
if len(c.patterns) > 0 {
|
||||
err := c._subscribe(cn, "psubscribe", mapKeys(c.patterns))
|
||||
if err != nil && firstErr == nil {
|
||||
firstErr = err
|
||||
}
|
||||
}
|
||||
|
||||
return firstErr
|
||||
}
|
||||
|
||||
func mapKeys(m map[string]struct{}) []string {
|
||||
s := make([]string, len(m))
|
||||
i := 0
|
||||
for k := range m {
|
||||
s[i] = k
|
||||
i++
|
||||
}
|
||||
return s
|
||||
}
|
||||
|
||||
func (c *PubSub) _subscribe(
|
||||
cn *pool.Conn, redisCmd string, channels []string,
|
||||
) error {
|
||||
args := make([]interface{}, 0, 1+len(channels))
|
||||
args = append(args, redisCmd)
|
||||
for _, channel := range channels {
|
||||
args = append(args, channel)
|
||||
}
|
||||
cmd := NewSliceCmd(args...)
|
||||
return c.writeCmd(cn, cmd)
|
||||
}
|
||||
|
||||
func (c *PubSub) releaseConn(cn *pool.Conn, err error, allowTimeout bool) {
|
||||
c.mu.Lock()
|
||||
c._releaseConn(cn, err, allowTimeout)
|
||||
c.mu.Unlock()
|
||||
}
|
||||
|
||||
func (c *PubSub) _releaseConn(cn *pool.Conn, err error, allowTimeout bool) {
|
||||
if c.cn != cn {
|
||||
return
|
||||
}
|
||||
if internal.IsBadConn(err, allowTimeout) {
|
||||
c._reconnect(err)
|
||||
}
|
||||
}
|
||||
|
||||
func (c *PubSub) _reconnect(reason error) {
|
||||
_ = c._closeTheCn(reason)
|
||||
_, _ = c._conn(nil)
|
||||
}
|
||||
|
||||
func (c *PubSub) _closeTheCn(reason error) error {
|
||||
if c.cn == nil {
|
||||
return nil
|
||||
}
|
||||
if !c.closed {
|
||||
internal.Logf("redis: discarding bad PubSub connection: %s", reason)
|
||||
}
|
||||
err := c.closeConn(c.cn)
|
||||
c.cn = nil
|
||||
return err
|
||||
}
|
||||
|
||||
func (c *PubSub) Close() error {
|
||||
c.mu.Lock()
|
||||
defer c.mu.Unlock()
|
||||
|
||||
if c.closed {
|
||||
return pool.ErrClosed
|
||||
}
|
||||
c.closed = true
|
||||
close(c.exit)
|
||||
|
||||
err := c._closeTheCn(pool.ErrClosed)
|
||||
return err
|
||||
}
|
||||
|
||||
// Subscribe the client to the specified channels. It returns
|
||||
// empty subscription if there are no channels.
|
||||
func (c *PubSub) Subscribe(channels ...string) error {
|
||||
c.mu.Lock()
|
||||
defer c.mu.Unlock()
|
||||
|
||||
err := c.subscribe("subscribe", channels...)
|
||||
if c.channels == nil {
|
||||
c.channels = make(map[string]struct{})
|
||||
}
|
||||
for _, s := range channels {
|
||||
c.channels[s] = struct{}{}
|
||||
}
|
||||
return err
|
||||
}
|
||||
|
||||
// PSubscribe the client to the given patterns. It returns
|
||||
// empty subscription if there are no patterns.
|
||||
func (c *PubSub) PSubscribe(patterns ...string) error {
|
||||
c.mu.Lock()
|
||||
defer c.mu.Unlock()
|
||||
|
||||
err := c.subscribe("psubscribe", patterns...)
|
||||
if c.patterns == nil {
|
||||
c.patterns = make(map[string]struct{})
|
||||
}
|
||||
for _, s := range patterns {
|
||||
c.patterns[s] = struct{}{}
|
||||
}
|
||||
return err
|
||||
}
|
||||
|
||||
// Unsubscribe the client from the given channels, or from all of
|
||||
// them if none is given.
|
||||
func (c *PubSub) Unsubscribe(channels ...string) error {
|
||||
c.mu.Lock()
|
||||
defer c.mu.Unlock()
|
||||
|
||||
for _, channel := range channels {
|
||||
delete(c.channels, channel)
|
||||
}
|
||||
err := c.subscribe("unsubscribe", channels...)
|
||||
return err
|
||||
}
|
||||
|
||||
// PUnsubscribe the client from the given patterns, or from all of
|
||||
// them if none is given.
|
||||
func (c *PubSub) PUnsubscribe(patterns ...string) error {
|
||||
c.mu.Lock()
|
||||
defer c.mu.Unlock()
|
||||
|
||||
for _, pattern := range patterns {
|
||||
delete(c.patterns, pattern)
|
||||
}
|
||||
err := c.subscribe("punsubscribe", patterns...)
|
||||
return err
|
||||
}
|
||||
|
||||
func (c *PubSub) subscribe(redisCmd string, channels ...string) error {
|
||||
cn, err := c._conn(channels)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
err = c._subscribe(cn, redisCmd, channels)
|
||||
c._releaseConn(cn, err, false)
|
||||
return err
|
||||
}
|
||||
|
||||
func (c *PubSub) Ping(payload ...string) error {
|
||||
args := []interface{}{"ping"}
|
||||
if len(payload) == 1 {
|
||||
args = append(args, payload[0])
|
||||
}
|
||||
cmd := NewCmd(args...)
|
||||
|
||||
cn, err := c.conn()
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
err = c.writeCmd(cn, cmd)
|
||||
c.releaseConn(cn, err, false)
|
||||
return err
|
||||
}
|
||||
|
||||
// Subscription received after a successful subscription to channel.
|
||||
type Subscription struct {
|
||||
// Can be "subscribe", "unsubscribe", "psubscribe" or "punsubscribe".
|
||||
Kind string
|
||||
// Channel name we have subscribed to.
|
||||
Channel string
|
||||
// Number of channels we are currently subscribed to.
|
||||
Count int
|
||||
}
|
||||
|
||||
func (m *Subscription) String() string {
|
||||
return fmt.Sprintf("%s: %s", m.Kind, m.Channel)
|
||||
}
|
||||
|
||||
// Message received as result of a PUBLISH command issued by another client.
|
||||
type Message struct {
|
||||
Channel string
|
||||
Pattern string
|
||||
Payload string
|
||||
}
|
||||
|
||||
func (m *Message) String() string {
|
||||
return fmt.Sprintf("Message<%s: %s>", m.Channel, m.Payload)
|
||||
}
|
||||
|
||||
// Pong received as result of a PING command issued by another client.
|
||||
type Pong struct {
|
||||
Payload string
|
||||
}
|
||||
|
||||
func (p *Pong) String() string {
|
||||
if p.Payload != "" {
|
||||
return fmt.Sprintf("Pong<%s>", p.Payload)
|
||||
}
|
||||
return "Pong"
|
||||
}
|
||||
|
||||
func (c *PubSub) newMessage(reply interface{}) (interface{}, error) {
|
||||
switch reply := reply.(type) {
|
||||
case string:
|
||||
return &Pong{
|
||||
Payload: reply,
|
||||
}, nil
|
||||
case []interface{}:
|
||||
switch kind := reply[0].(string); kind {
|
||||
case "subscribe", "unsubscribe", "psubscribe", "punsubscribe":
|
||||
return &Subscription{
|
||||
Kind: kind,
|
||||
Channel: reply[1].(string),
|
||||
Count: int(reply[2].(int64)),
|
||||
}, nil
|
||||
case "message":
|
||||
return &Message{
|
||||
Channel: reply[1].(string),
|
||||
Payload: reply[2].(string),
|
||||
}, nil
|
||||
case "pmessage":
|
||||
return &Message{
|
||||
Pattern: reply[1].(string),
|
||||
Channel: reply[2].(string),
|
||||
Payload: reply[3].(string),
|
||||
}, nil
|
||||
case "pong":
|
||||
return &Pong{
|
||||
Payload: reply[1].(string),
|
||||
}, nil
|
||||
default:
|
||||
return nil, fmt.Errorf("redis: unsupported pubsub message: %q", kind)
|
||||
}
|
||||
default:
|
||||
return nil, fmt.Errorf("redis: unsupported pubsub message: %#v", reply)
|
||||
}
|
||||
}
|
||||
|
||||
// ReceiveTimeout acts like Receive but returns an error if message
|
||||
// is not received in time. This is low-level API and in most cases
|
||||
// Channel should be used instead.
|
||||
func (c *PubSub) ReceiveTimeout(timeout time.Duration) (interface{}, error) {
|
||||
if c.cmd == nil {
|
||||
c.cmd = NewCmd()
|
||||
}
|
||||
|
||||
cn, err := c.conn()
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
err = cn.WithReader(timeout, func(rd *proto.Reader) error {
|
||||
return c.cmd.readReply(rd)
|
||||
})
|
||||
|
||||
c.releaseConn(cn, err, timeout > 0)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
return c.newMessage(c.cmd.Val())
|
||||
}
|
||||
|
||||
// Receive returns a message as a Subscription, Message, Pong or error.
|
||||
// See PubSub example for details. This is low-level API and in most cases
|
||||
// Channel should be used instead.
|
||||
func (c *PubSub) Receive() (interface{}, error) {
|
||||
return c.ReceiveTimeout(0)
|
||||
}
|
||||
|
||||
// ReceiveMessage returns a Message or error ignoring Subscription and Pong
|
||||
// messages. This is low-level API and in most cases Channel should be used
|
||||
// instead.
|
||||
func (c *PubSub) ReceiveMessage() (*Message, error) {
|
||||
for {
|
||||
msg, err := c.Receive()
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
switch msg := msg.(type) {
|
||||
case *Subscription:
|
||||
// Ignore.
|
||||
case *Pong:
|
||||
// Ignore.
|
||||
case *Message:
|
||||
return msg, nil
|
||||
default:
|
||||
err := fmt.Errorf("redis: unknown message: %T", msg)
|
||||
return nil, err
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Channel returns a Go channel for concurrently receiving messages.
|
||||
// It periodically sends Ping messages to test connection health.
|
||||
// The channel is closed with PubSub. Receive* APIs can not be used
|
||||
// after channel is created.
|
||||
func (c *PubSub) Channel() <-chan *Message {
|
||||
c.chOnce.Do(c.initChannel)
|
||||
return c.ch
|
||||
}
|
||||
|
||||
func (c *PubSub) initChannel() {
|
||||
c.ch = make(chan *Message, 100)
|
||||
c.ping = make(chan struct{}, 10)
|
||||
|
||||
go func() {
|
||||
var errCount int
|
||||
for {
|
||||
msg, err := c.Receive()
|
||||
if err != nil {
|
||||
if err == pool.ErrClosed {
|
||||
close(c.ch)
|
||||
return
|
||||
}
|
||||
if errCount > 0 {
|
||||
time.Sleep(c.retryBackoff(errCount))
|
||||
}
|
||||
errCount++
|
||||
continue
|
||||
}
|
||||
errCount = 0
|
||||
|
||||
// Any message is as good as a ping.
|
||||
select {
|
||||
case c.ping <- struct{}{}:
|
||||
default:
|
||||
}
|
||||
|
||||
switch msg := msg.(type) {
|
||||
case *Subscription:
|
||||
// Ignore.
|
||||
case *Pong:
|
||||
// Ignore.
|
||||
case *Message:
|
||||
c.ch <- msg
|
||||
default:
|
||||
internal.Logf("redis: unknown message: %T", msg)
|
||||
}
|
||||
}
|
||||
}()
|
||||
|
||||
go func() {
|
||||
const timeout = 5 * time.Second
|
||||
|
||||
timer := time.NewTimer(timeout)
|
||||
timer.Stop()
|
||||
|
||||
healthy := true
|
||||
for {
|
||||
timer.Reset(timeout)
|
||||
select {
|
||||
case <-c.ping:
|
||||
healthy = true
|
||||
if !timer.Stop() {
|
||||
<-timer.C
|
||||
}
|
||||
case <-timer.C:
|
||||
pingErr := c.Ping()
|
||||
if healthy {
|
||||
healthy = false
|
||||
} else {
|
||||
if pingErr == nil {
|
||||
pingErr = errPingTimeout
|
||||
}
|
||||
c.mu.Lock()
|
||||
c._reconnect(pingErr)
|
||||
c.mu.Unlock()
|
||||
}
|
||||
case <-c.exit:
|
||||
return
|
||||
}
|
||||
}
|
||||
}()
|
||||
}
|
||||
|
||||
func (c *PubSub) retryBackoff(attempt int) time.Duration {
|
||||
return internal.RetryBackoff(attempt, c.opt.MinRetryBackoff, c.opt.MaxRetryBackoff)
|
||||
}
|
||||
|
|
@ -0,0 +1,580 @@
|
|||
package redis
|
||||
|
||||
import (
|
||||
"context"
|
||||
"fmt"
|
||||
"log"
|
||||
"os"
|
||||
"time"
|
||||
|
||||
"github.com/go-redis/redis/internal"
|
||||
"github.com/go-redis/redis/internal/pool"
|
||||
"github.com/go-redis/redis/internal/proto"
|
||||
)
|
||||
|
||||
// Nil reply Redis returns when key does not exist.
|
||||
const Nil = proto.Nil
|
||||
|
||||
func init() {
|
||||
SetLogger(log.New(os.Stderr, "redis: ", log.LstdFlags|log.Lshortfile))
|
||||
}
|
||||
|
||||
func SetLogger(logger *log.Logger) {
|
||||
internal.Logger = logger
|
||||
}
|
||||
|
||||
type baseClient struct {
|
||||
opt *Options
|
||||
connPool pool.Pooler
|
||||
limiter Limiter
|
||||
|
||||
process func(Cmder) error
|
||||
processPipeline func([]Cmder) error
|
||||
processTxPipeline func([]Cmder) error
|
||||
|
||||
onClose func() error // hook called when client is closed
|
||||
}
|
||||
|
||||
func (c *baseClient) init() {
|
||||
c.process = c.defaultProcess
|
||||
c.processPipeline = c.defaultProcessPipeline
|
||||
c.processTxPipeline = c.defaultProcessTxPipeline
|
||||
}
|
||||
|
||||
func (c *baseClient) String() string {
|
||||
return fmt.Sprintf("Redis<%s db:%d>", c.getAddr(), c.opt.DB)
|
||||
}
|
||||
|
||||
func (c *baseClient) newConn() (*pool.Conn, error) {
|
||||
cn, err := c.connPool.NewConn()
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
if cn.InitedAt.IsZero() {
|
||||
if err := c.initConn(cn); err != nil {
|
||||
_ = c.connPool.CloseConn(cn)
|
||||
return nil, err
|
||||
}
|
||||
}
|
||||
|
||||
return cn, nil
|
||||
}
|
||||
|
||||
func (c *baseClient) getConn() (*pool.Conn, error) {
|
||||
if c.limiter != nil {
|
||||
err := c.limiter.Allow()
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
}
|
||||
|
||||
cn, err := c._getConn()
|
||||
if err != nil {
|
||||
if c.limiter != nil {
|
||||
c.limiter.ReportResult(err)
|
||||
}
|
||||
return nil, err
|
||||
}
|
||||
return cn, nil
|
||||
}
|
||||
|
||||
func (c *baseClient) _getConn() (*pool.Conn, error) {
|
||||
cn, err := c.connPool.Get()
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
if cn.InitedAt.IsZero() {
|
||||
err := c.initConn(cn)
|
||||
if err != nil {
|
||||
c.connPool.Remove(cn)
|
||||
return nil, err
|
||||
}
|
||||
}
|
||||
|
||||
return cn, nil
|
||||
}
|
||||
|
||||
func (c *baseClient) releaseConn(cn *pool.Conn, err error) {
|
||||
if c.limiter != nil {
|
||||
c.limiter.ReportResult(err)
|
||||
}
|
||||
|
||||
if internal.IsBadConn(err, false) {
|
||||
c.connPool.Remove(cn)
|
||||
} else {
|
||||
c.connPool.Put(cn)
|
||||
}
|
||||
}
|
||||
|
||||
func (c *baseClient) releaseConnStrict(cn *pool.Conn, err error) {
|
||||
if c.limiter != nil {
|
||||
c.limiter.ReportResult(err)
|
||||
}
|
||||
|
||||
if err == nil || internal.IsRedisError(err) {
|
||||
c.connPool.Put(cn)
|
||||
} else {
|
||||
c.connPool.Remove(cn)
|
||||
}
|
||||
}
|
||||
|
||||
func (c *baseClient) initConn(cn *pool.Conn) error {
|
||||
cn.InitedAt = time.Now()
|
||||
|
||||
if c.opt.Password == "" &&
|
||||
c.opt.DB == 0 &&
|
||||
!c.opt.readOnly &&
|
||||
c.opt.OnConnect == nil {
|
||||
return nil
|
||||
}
|
||||
|
||||
conn := newConn(c.opt, cn)
|
||||
_, err := conn.Pipelined(func(pipe Pipeliner) error {
|
||||
if c.opt.Password != "" {
|
||||
pipe.Auth(c.opt.Password)
|
||||
}
|
||||
|
||||
if c.opt.DB > 0 {
|
||||
pipe.Select(c.opt.DB)
|
||||
}
|
||||
|
||||
if c.opt.readOnly {
|
||||
pipe.ReadOnly()
|
||||
}
|
||||
|
||||
return nil
|
||||
})
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
if c.opt.OnConnect != nil {
|
||||
return c.opt.OnConnect(conn)
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
// Do creates a Cmd from the args and processes the cmd.
|
||||
func (c *baseClient) Do(args ...interface{}) *Cmd {
|
||||
cmd := NewCmd(args...)
|
||||
_ = c.Process(cmd)
|
||||
return cmd
|
||||
}
|
||||
|
||||
// WrapProcess wraps function that processes Redis commands.
|
||||
func (c *baseClient) WrapProcess(
|
||||
fn func(oldProcess func(cmd Cmder) error) func(cmd Cmder) error,
|
||||
) {
|
||||
c.process = fn(c.process)
|
||||
}
|
||||
|
||||
func (c *baseClient) Process(cmd Cmder) error {
|
||||
return c.process(cmd)
|
||||
}
|
||||
|
||||
func (c *baseClient) defaultProcess(cmd Cmder) error {
|
||||
for attempt := 0; attempt <= c.opt.MaxRetries; attempt++ {
|
||||
if attempt > 0 {
|
||||
time.Sleep(c.retryBackoff(attempt))
|
||||
}
|
||||
|
||||
cn, err := c.getConn()
|
||||
if err != nil {
|
||||
cmd.setErr(err)
|
||||
if internal.IsRetryableError(err, true) {
|
||||
continue
|
||||
}
|
||||
return err
|
||||
}
|
||||
|
||||
err = cn.WithWriter(c.opt.WriteTimeout, func(wr *proto.Writer) error {
|
||||
return writeCmd(wr, cmd)
|
||||
})
|
||||
if err != nil {
|
||||
c.releaseConn(cn, err)
|
||||
cmd.setErr(err)
|
||||
if internal.IsRetryableError(err, true) {
|
||||
continue
|
||||
}
|
||||
return err
|
||||
}
|
||||
|
||||
err = cn.WithReader(c.cmdTimeout(cmd), func(rd *proto.Reader) error {
|
||||
return cmd.readReply(rd)
|
||||
})
|
||||
c.releaseConn(cn, err)
|
||||
if err != nil && internal.IsRetryableError(err, cmd.readTimeout() == nil) {
|
||||
continue
|
||||
}
|
||||
|
||||
return err
|
||||
}
|
||||
|
||||
return cmd.Err()
|
||||
}
|
||||
|
||||
func (c *baseClient) retryBackoff(attempt int) time.Duration {
|
||||
return internal.RetryBackoff(attempt, c.opt.MinRetryBackoff, c.opt.MaxRetryBackoff)
|
||||
}
|
||||
|
||||
func (c *baseClient) cmdTimeout(cmd Cmder) time.Duration {
|
||||
if timeout := cmd.readTimeout(); timeout != nil {
|
||||
t := *timeout
|
||||
if t == 0 {
|
||||
return 0
|
||||
}
|
||||
return t + 10*time.Second
|
||||
}
|
||||
return c.opt.ReadTimeout
|
||||
}
|
||||
|
||||
// Close closes the client, releasing any open resources.
|
||||
//
|
||||
// It is rare to Close a Client, as the Client is meant to be
|
||||
// long-lived and shared between many goroutines.
|
||||
func (c *baseClient) Close() error {
|
||||
var firstErr error
|
||||
if c.onClose != nil {
|
||||
if err := c.onClose(); err != nil && firstErr == nil {
|
||||
firstErr = err
|
||||
}
|
||||
}
|
||||
if err := c.connPool.Close(); err != nil && firstErr == nil {
|
||||
firstErr = err
|
||||
}
|
||||
return firstErr
|
||||
}
|
||||
|
||||
func (c *baseClient) getAddr() string {
|
||||
return c.opt.Addr
|
||||
}
|
||||
|
||||
func (c *baseClient) WrapProcessPipeline(
|
||||
fn func(oldProcess func([]Cmder) error) func([]Cmder) error,
|
||||
) {
|
||||
c.processPipeline = fn(c.processPipeline)
|
||||
c.processTxPipeline = fn(c.processTxPipeline)
|
||||
}
|
||||
|
||||
func (c *baseClient) defaultProcessPipeline(cmds []Cmder) error {
|
||||
return c.generalProcessPipeline(cmds, c.pipelineProcessCmds)
|
||||
}
|
||||
|
||||
func (c *baseClient) defaultProcessTxPipeline(cmds []Cmder) error {
|
||||
return c.generalProcessPipeline(cmds, c.txPipelineProcessCmds)
|
||||
}
|
||||
|
||||
type pipelineProcessor func(*pool.Conn, []Cmder) (bool, error)
|
||||
|
||||
func (c *baseClient) generalProcessPipeline(cmds []Cmder, p pipelineProcessor) error {
|
||||
for attempt := 0; attempt <= c.opt.MaxRetries; attempt++ {
|
||||
if attempt > 0 {
|
||||
time.Sleep(c.retryBackoff(attempt))
|
||||
}
|
||||
|
||||
cn, err := c.getConn()
|
||||
if err != nil {
|
||||
setCmdsErr(cmds, err)
|
||||
return err
|
||||
}
|
||||
|
||||
canRetry, err := p(cn, cmds)
|
||||
c.releaseConnStrict(cn, err)
|
||||
|
||||
if !canRetry || !internal.IsRetryableError(err, true) {
|
||||
break
|
||||
}
|
||||
}
|
||||
return cmdsFirstErr(cmds)
|
||||
}
|
||||
|
||||
func (c *baseClient) pipelineProcessCmds(cn *pool.Conn, cmds []Cmder) (bool, error) {
|
||||
err := cn.WithWriter(c.opt.WriteTimeout, func(wr *proto.Writer) error {
|
||||
return writeCmd(wr, cmds...)
|
||||
})
|
||||
if err != nil {
|
||||
setCmdsErr(cmds, err)
|
||||
return true, err
|
||||
}
|
||||
|
||||
err = cn.WithReader(c.opt.ReadTimeout, func(rd *proto.Reader) error {
|
||||
return pipelineReadCmds(rd, cmds)
|
||||
})
|
||||
return true, err
|
||||
}
|
||||
|
||||
func pipelineReadCmds(rd *proto.Reader, cmds []Cmder) error {
|
||||
for _, cmd := range cmds {
|
||||
err := cmd.readReply(rd)
|
||||
if err != nil && !internal.IsRedisError(err) {
|
||||
return err
|
||||
}
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
func (c *baseClient) txPipelineProcessCmds(cn *pool.Conn, cmds []Cmder) (bool, error) {
|
||||
err := cn.WithWriter(c.opt.WriteTimeout, func(wr *proto.Writer) error {
|
||||
return txPipelineWriteMulti(wr, cmds)
|
||||
})
|
||||
if err != nil {
|
||||
setCmdsErr(cmds, err)
|
||||
return true, err
|
||||
}
|
||||
|
||||
err = cn.WithReader(c.opt.ReadTimeout, func(rd *proto.Reader) error {
|
||||
err := txPipelineReadQueued(rd, cmds)
|
||||
if err != nil {
|
||||
setCmdsErr(cmds, err)
|
||||
return err
|
||||
}
|
||||
return pipelineReadCmds(rd, cmds)
|
||||
})
|
||||
return false, err
|
||||
}
|
||||
|
||||
func txPipelineWriteMulti(wr *proto.Writer, cmds []Cmder) error {
|
||||
multiExec := make([]Cmder, 0, len(cmds)+2)
|
||||
multiExec = append(multiExec, NewStatusCmd("MULTI"))
|
||||
multiExec = append(multiExec, cmds...)
|
||||
multiExec = append(multiExec, NewSliceCmd("EXEC"))
|
||||
return writeCmd(wr, multiExec...)
|
||||
}
|
||||
|
||||
func txPipelineReadQueued(rd *proto.Reader, cmds []Cmder) error {
|
||||
// Parse queued replies.
|
||||
var statusCmd StatusCmd
|
||||
err := statusCmd.readReply(rd)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
for range cmds {
|
||||
err = statusCmd.readReply(rd)
|
||||
if err != nil && !internal.IsRedisError(err) {
|
||||
return err
|
||||
}
|
||||
}
|
||||
|
||||
// Parse number of replies.
|
||||
line, err := rd.ReadLine()
|
||||
if err != nil {
|
||||
if err == Nil {
|
||||
err = TxFailedErr
|
||||
}
|
||||
return err
|
||||
}
|
||||
|
||||
switch line[0] {
|
||||
case proto.ErrorReply:
|
||||
return proto.ParseErrorReply(line)
|
||||
case proto.ArrayReply:
|
||||
// ok
|
||||
default:
|
||||
err := fmt.Errorf("redis: expected '*', but got line %q", line)
|
||||
return err
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
//------------------------------------------------------------------------------
|
||||
|
||||
// Client is a Redis client representing a pool of zero or more
|
||||
// underlying connections. It's safe for concurrent use by multiple
|
||||
// goroutines.
|
||||
type Client struct {
|
||||
baseClient
|
||||
cmdable
|
||||
|
||||
ctx context.Context
|
||||
}
|
||||
|
||||
// NewClient returns a client to the Redis Server specified by Options.
|
||||
func NewClient(opt *Options) *Client {
|
||||
opt.init()
|
||||
|
||||
c := Client{
|
||||
baseClient: baseClient{
|
||||
opt: opt,
|
||||
connPool: newConnPool(opt),
|
||||
},
|
||||
}
|
||||
c.baseClient.init()
|
||||
c.init()
|
||||
|
||||
return &c
|
||||
}
|
||||
|
||||
func (c *Client) init() {
|
||||
c.cmdable.setProcessor(c.Process)
|
||||
}
|
||||
|
||||
func (c *Client) Context() context.Context {
|
||||
if c.ctx != nil {
|
||||
return c.ctx
|
||||
}
|
||||
return context.Background()
|
||||
}
|
||||
|
||||
func (c *Client) WithContext(ctx context.Context) *Client {
|
||||
if ctx == nil {
|
||||
panic("nil context")
|
||||
}
|
||||
c2 := c.clone()
|
||||
c2.ctx = ctx
|
||||
return c2
|
||||
}
|
||||
|
||||
func (c *Client) clone() *Client {
|
||||
cp := *c
|
||||
cp.init()
|
||||
return &cp
|
||||
}
|
||||
|
||||
// Options returns read-only Options that were used to create the client.
|
||||
func (c *Client) Options() *Options {
|
||||
return c.opt
|
||||
}
|
||||
|
||||
func (c *Client) SetLimiter(l Limiter) *Client {
|
||||
c.limiter = l
|
||||
return c
|
||||
}
|
||||
|
||||
type PoolStats pool.Stats
|
||||
|
||||
// PoolStats returns connection pool stats.
|
||||
func (c *Client) PoolStats() *PoolStats {
|
||||
stats := c.connPool.Stats()
|
||||
return (*PoolStats)(stats)
|
||||
}
|
||||
|
||||
func (c *Client) Pipelined(fn func(Pipeliner) error) ([]Cmder, error) {
|
||||
return c.Pipeline().Pipelined(fn)
|
||||
}
|
||||
|
||||
func (c *Client) Pipeline() Pipeliner {
|
||||
pipe := Pipeline{
|
||||
exec: c.processPipeline,
|
||||
}
|
||||
pipe.statefulCmdable.setProcessor(pipe.Process)
|
||||
return &pipe
|
||||
}
|
||||
|
||||
func (c *Client) TxPipelined(fn func(Pipeliner) error) ([]Cmder, error) {
|
||||
return c.TxPipeline().Pipelined(fn)
|
||||
}
|
||||
|
||||
// TxPipeline acts like Pipeline, but wraps queued commands with MULTI/EXEC.
|
||||
func (c *Client) TxPipeline() Pipeliner {
|
||||
pipe := Pipeline{
|
||||
exec: c.processTxPipeline,
|
||||
}
|
||||
pipe.statefulCmdable.setProcessor(pipe.Process)
|
||||
return &pipe
|
||||
}
|
||||
|
||||
func (c *Client) pubSub() *PubSub {
|
||||
pubsub := &PubSub{
|
||||
opt: c.opt,
|
||||
|
||||
newConn: func(channels []string) (*pool.Conn, error) {
|
||||
return c.newConn()
|
||||
},
|
||||
closeConn: c.connPool.CloseConn,
|
||||
}
|
||||
pubsub.init()
|
||||
return pubsub
|
||||
}
|
||||
|
||||
// Subscribe subscribes the client to the specified channels.
|
||||
// Channels can be omitted to create empty subscription.
|
||||
// Note that this method does not wait on a response from Redis, so the
|
||||
// subscription may not be active immediately. To force the connection to wait,
|
||||
// you may call the Receive() method on the returned *PubSub like so:
|
||||
//
|
||||
// sub := client.Subscribe(queryResp)
|
||||
// iface, err := sub.Receive()
|
||||
// if err != nil {
|
||||
// // handle error
|
||||
// }
|
||||
//
|
||||
// // Should be *Subscription, but others are possible if other actions have been
|
||||
// // taken on sub since it was created.
|
||||
// switch iface.(type) {
|
||||
// case *Subscription:
|
||||
// // subscribe succeeded
|
||||
// case *Message:
|
||||
// // received first message
|
||||
// case *Pong:
|
||||
// // pong received
|
||||
// default:
|
||||
// // handle error
|
||||
// }
|
||||
//
|
||||
// ch := sub.Channel()
|
||||
func (c *Client) Subscribe(channels ...string) *PubSub {
|
||||
pubsub := c.pubSub()
|
||||
if len(channels) > 0 {
|
||||
_ = pubsub.Subscribe(channels...)
|
||||
}
|
||||
return pubsub
|
||||
}
|
||||
|
||||
// PSubscribe subscribes the client to the given patterns.
|
||||
// Patterns can be omitted to create empty subscription.
|
||||
func (c *Client) PSubscribe(channels ...string) *PubSub {
|
||||
pubsub := c.pubSub()
|
||||
if len(channels) > 0 {
|
||||
_ = pubsub.PSubscribe(channels...)
|
||||
}
|
||||
return pubsub
|
||||
}
|
||||
|
||||
//------------------------------------------------------------------------------
|
||||
|
||||
// Conn is like Client, but its pool contains single connection.
|
||||
type Conn struct {
|
||||
baseClient
|
||||
statefulCmdable
|
||||
}
|
||||
|
||||
func newConn(opt *Options, cn *pool.Conn) *Conn {
|
||||
c := Conn{
|
||||
baseClient: baseClient{
|
||||
opt: opt,
|
||||
connPool: pool.NewSingleConnPool(cn),
|
||||
},
|
||||
}
|
||||
c.baseClient.init()
|
||||
c.statefulCmdable.setProcessor(c.Process)
|
||||
return &c
|
||||
}
|
||||
|
||||
func (c *Conn) Pipelined(fn func(Pipeliner) error) ([]Cmder, error) {
|
||||
return c.Pipeline().Pipelined(fn)
|
||||
}
|
||||
|
||||
func (c *Conn) Pipeline() Pipeliner {
|
||||
pipe := Pipeline{
|
||||
exec: c.processPipeline,
|
||||
}
|
||||
pipe.statefulCmdable.setProcessor(pipe.Process)
|
||||
return &pipe
|
||||
}
|
||||
|
||||
func (c *Conn) TxPipelined(fn func(Pipeliner) error) ([]Cmder, error) {
|
||||
return c.TxPipeline().Pipelined(fn)
|
||||
}
|
||||
|
||||
// TxPipeline acts like Pipeline, but wraps queued commands with MULTI/EXEC.
|
||||
func (c *Conn) TxPipeline() Pipeliner {
|
||||
pipe := Pipeline{
|
||||
exec: c.processTxPipeline,
|
||||
}
|
||||
pipe.statefulCmdable.setProcessor(pipe.Process)
|
||||
return &pipe
|
||||
}
|
||||
|
|
@ -0,0 +1,140 @@
|
|||
package redis
|
||||
|
||||
import "time"
|
||||
|
||||
// NewCmdResult returns a Cmd initialised with val and err for testing
|
||||
func NewCmdResult(val interface{}, err error) *Cmd {
|
||||
var cmd Cmd
|
||||
cmd.val = val
|
||||
cmd.setErr(err)
|
||||
return &cmd
|
||||
}
|
||||
|
||||
// NewSliceResult returns a SliceCmd initialised with val and err for testing
|
||||
func NewSliceResult(val []interface{}, err error) *SliceCmd {
|
||||
var cmd SliceCmd
|
||||
cmd.val = val
|
||||
cmd.setErr(err)
|
||||
return &cmd
|
||||
}
|
||||
|
||||
// NewStatusResult returns a StatusCmd initialised with val and err for testing
|
||||
func NewStatusResult(val string, err error) *StatusCmd {
|
||||
var cmd StatusCmd
|
||||
cmd.val = val
|
||||
cmd.setErr(err)
|
||||
return &cmd
|
||||
}
|
||||
|
||||
// NewIntResult returns an IntCmd initialised with val and err for testing
|
||||
func NewIntResult(val int64, err error) *IntCmd {
|
||||
var cmd IntCmd
|
||||
cmd.val = val
|
||||
cmd.setErr(err)
|
||||
return &cmd
|
||||
}
|
||||
|
||||
// NewDurationResult returns a DurationCmd initialised with val and err for testing
|
||||
func NewDurationResult(val time.Duration, err error) *DurationCmd {
|
||||
var cmd DurationCmd
|
||||
cmd.val = val
|
||||
cmd.setErr(err)
|
||||
return &cmd
|
||||
}
|
||||
|
||||
// NewBoolResult returns a BoolCmd initialised with val and err for testing
|
||||
func NewBoolResult(val bool, err error) *BoolCmd {
|
||||
var cmd BoolCmd
|
||||
cmd.val = val
|
||||
cmd.setErr(err)
|
||||
return &cmd
|
||||
}
|
||||
|
||||
// NewStringResult returns a StringCmd initialised with val and err for testing
|
||||
func NewStringResult(val string, err error) *StringCmd {
|
||||
var cmd StringCmd
|
||||
cmd.val = val
|
||||
cmd.setErr(err)
|
||||
return &cmd
|
||||
}
|
||||
|
||||
// NewFloatResult returns a FloatCmd initialised with val and err for testing
|
||||
func NewFloatResult(val float64, err error) *FloatCmd {
|
||||
var cmd FloatCmd
|
||||
cmd.val = val
|
||||
cmd.setErr(err)
|
||||
return &cmd
|
||||
}
|
||||
|
||||
// NewStringSliceResult returns a StringSliceCmd initialised with val and err for testing
|
||||
func NewStringSliceResult(val []string, err error) *StringSliceCmd {
|
||||
var cmd StringSliceCmd
|
||||
cmd.val = val
|
||||
cmd.setErr(err)
|
||||
return &cmd
|
||||
}
|
||||
|
||||
// NewBoolSliceResult returns a BoolSliceCmd initialised with val and err for testing
|
||||
func NewBoolSliceResult(val []bool, err error) *BoolSliceCmd {
|
||||
var cmd BoolSliceCmd
|
||||
cmd.val = val
|
||||
cmd.setErr(err)
|
||||
return &cmd
|
||||
}
|
||||
|
||||
// NewStringStringMapResult returns a StringStringMapCmd initialised with val and err for testing
|
||||
func NewStringStringMapResult(val map[string]string, err error) *StringStringMapCmd {
|
||||
var cmd StringStringMapCmd
|
||||
cmd.val = val
|
||||
cmd.setErr(err)
|
||||
return &cmd
|
||||
}
|
||||
|
||||
// NewStringIntMapCmdResult returns a StringIntMapCmd initialised with val and err for testing
|
||||
func NewStringIntMapCmdResult(val map[string]int64, err error) *StringIntMapCmd {
|
||||
var cmd StringIntMapCmd
|
||||
cmd.val = val
|
||||
cmd.setErr(err)
|
||||
return &cmd
|
||||
}
|
||||
|
||||
// NewZSliceCmdResult returns a ZSliceCmd initialised with val and err for testing
|
||||
func NewZSliceCmdResult(val []Z, err error) *ZSliceCmd {
|
||||
var cmd ZSliceCmd
|
||||
cmd.val = val
|
||||
cmd.setErr(err)
|
||||
return &cmd
|
||||
}
|
||||
|
||||
// NewScanCmdResult returns a ScanCmd initialised with val and err for testing
|
||||
func NewScanCmdResult(keys []string, cursor uint64, err error) *ScanCmd {
|
||||
var cmd ScanCmd
|
||||
cmd.page = keys
|
||||
cmd.cursor = cursor
|
||||
cmd.setErr(err)
|
||||
return &cmd
|
||||
}
|
||||
|
||||
// NewClusterSlotsCmdResult returns a ClusterSlotsCmd initialised with val and err for testing
|
||||
func NewClusterSlotsCmdResult(val []ClusterSlot, err error) *ClusterSlotsCmd {
|
||||
var cmd ClusterSlotsCmd
|
||||
cmd.val = val
|
||||
cmd.setErr(err)
|
||||
return &cmd
|
||||
}
|
||||
|
||||
// NewGeoLocationCmdResult returns a GeoLocationCmd initialised with val and err for testing
|
||||
func NewGeoLocationCmdResult(val []GeoLocation, err error) *GeoLocationCmd {
|
||||
var cmd GeoLocationCmd
|
||||
cmd.locations = val
|
||||
cmd.setErr(err)
|
||||
return &cmd
|
||||
}
|
||||
|
||||
// NewCommandsInfoCmdResult returns a CommandsInfoCmd initialised with val and err for testing
|
||||
func NewCommandsInfoCmdResult(val map[string]*CommandInfo, err error) *CommandsInfoCmd {
|
||||
var cmd CommandsInfoCmd
|
||||
cmd.val = val
|
||||
cmd.setErr(err)
|
||||
return &cmd
|
||||
}
|
||||
|
|
@ -0,0 +1,658 @@
|
|||
package redis
|
||||
|
||||
import (
|
||||
"context"
|
||||
"errors"
|
||||
"fmt"
|
||||
"math/rand"
|
||||
"strconv"
|
||||
"sync"
|
||||
"sync/atomic"
|
||||
"time"
|
||||
|
||||
"github.com/go-redis/redis/internal"
|
||||
"github.com/go-redis/redis/internal/consistenthash"
|
||||
"github.com/go-redis/redis/internal/hashtag"
|
||||
"github.com/go-redis/redis/internal/pool"
|
||||
)
|
||||
|
||||
// Hash is type of hash function used in consistent hash.
|
||||
type Hash consistenthash.Hash
|
||||
|
||||
var errRingShardsDown = errors.New("redis: all ring shards are down")
|
||||
|
||||
// RingOptions are used to configure a ring client and should be
|
||||
// passed to NewRing.
|
||||
type RingOptions struct {
|
||||
// Map of name => host:port addresses of ring shards.
|
||||
Addrs map[string]string
|
||||
|
||||
// Frequency of PING commands sent to check shards availability.
|
||||
// Shard is considered down after 3 subsequent failed checks.
|
||||
HeartbeatFrequency time.Duration
|
||||
|
||||
// Hash function used in consistent hash.
|
||||
// Default is crc32.ChecksumIEEE.
|
||||
Hash Hash
|
||||
|
||||
// Number of replicas in consistent hash.
|
||||
// Default is 100 replicas.
|
||||
//
|
||||
// Higher number of replicas will provide less deviation, that is keys will be
|
||||
// distributed to nodes more evenly.
|
||||
//
|
||||
// Following is deviation for common nreplicas:
|
||||
// --------------------------------------------------------
|
||||
// | nreplicas | standard error | 99% confidence interval |
|
||||
// | 10 | 0.3152 | (0.37, 1.98) |
|
||||
// | 100 | 0.0997 | (0.76, 1.28) |
|
||||
// | 1000 | 0.0316 | (0.92, 1.09) |
|
||||
// --------------------------------------------------------
|
||||
//
|
||||
// See https://arxiv.org/abs/1406.2294 for reference
|
||||
HashReplicas int
|
||||
|
||||
// Following options are copied from Options struct.
|
||||
|
||||
OnConnect func(*Conn) error
|
||||
|
||||
DB int
|
||||
Password string
|
||||
|
||||
MaxRetries int
|
||||
MinRetryBackoff time.Duration
|
||||
MaxRetryBackoff time.Duration
|
||||
|
||||
DialTimeout time.Duration
|
||||
ReadTimeout time.Duration
|
||||
WriteTimeout time.Duration
|
||||
|
||||
PoolSize int
|
||||
MinIdleConns int
|
||||
MaxConnAge time.Duration
|
||||
PoolTimeout time.Duration
|
||||
IdleTimeout time.Duration
|
||||
IdleCheckFrequency time.Duration
|
||||
}
|
||||
|
||||
func (opt *RingOptions) init() {
|
||||
if opt.HeartbeatFrequency == 0 {
|
||||
opt.HeartbeatFrequency = 500 * time.Millisecond
|
||||
}
|
||||
|
||||
if opt.HashReplicas == 0 {
|
||||
opt.HashReplicas = 100
|
||||
}
|
||||
|
||||
switch opt.MinRetryBackoff {
|
||||
case -1:
|
||||
opt.MinRetryBackoff = 0
|
||||
case 0:
|
||||
opt.MinRetryBackoff = 8 * time.Millisecond
|
||||
}
|
||||
switch opt.MaxRetryBackoff {
|
||||
case -1:
|
||||
opt.MaxRetryBackoff = 0
|
||||
case 0:
|
||||
opt.MaxRetryBackoff = 512 * time.Millisecond
|
||||
}
|
||||
}
|
||||
|
||||
func (opt *RingOptions) clientOptions() *Options {
|
||||
return &Options{
|
||||
OnConnect: opt.OnConnect,
|
||||
|
||||
DB: opt.DB,
|
||||
Password: opt.Password,
|
||||
|
||||
DialTimeout: opt.DialTimeout,
|
||||
ReadTimeout: opt.ReadTimeout,
|
||||
WriteTimeout: opt.WriteTimeout,
|
||||
|
||||
PoolSize: opt.PoolSize,
|
||||
MinIdleConns: opt.MinIdleConns,
|
||||
MaxConnAge: opt.MaxConnAge,
|
||||
PoolTimeout: opt.PoolTimeout,
|
||||
IdleTimeout: opt.IdleTimeout,
|
||||
IdleCheckFrequency: opt.IdleCheckFrequency,
|
||||
}
|
||||
}
|
||||
|
||||
//------------------------------------------------------------------------------
|
||||
|
||||
type ringShard struct {
|
||||
Client *Client
|
||||
down int32
|
||||
}
|
||||
|
||||
func (shard *ringShard) String() string {
|
||||
var state string
|
||||
if shard.IsUp() {
|
||||
state = "up"
|
||||
} else {
|
||||
state = "down"
|
||||
}
|
||||
return fmt.Sprintf("%s is %s", shard.Client, state)
|
||||
}
|
||||
|
||||
func (shard *ringShard) IsDown() bool {
|
||||
const threshold = 3
|
||||
return atomic.LoadInt32(&shard.down) >= threshold
|
||||
}
|
||||
|
||||
func (shard *ringShard) IsUp() bool {
|
||||
return !shard.IsDown()
|
||||
}
|
||||
|
||||
// Vote votes to set shard state and returns true if state was changed.
|
||||
func (shard *ringShard) Vote(up bool) bool {
|
||||
if up {
|
||||
changed := shard.IsDown()
|
||||
atomic.StoreInt32(&shard.down, 0)
|
||||
return changed
|
||||
}
|
||||
|
||||
if shard.IsDown() {
|
||||
return false
|
||||
}
|
||||
|
||||
atomic.AddInt32(&shard.down, 1)
|
||||
return shard.IsDown()
|
||||
}
|
||||
|
||||
//------------------------------------------------------------------------------
|
||||
|
||||
type ringShards struct {
|
||||
opt *RingOptions
|
||||
|
||||
mu sync.RWMutex
|
||||
hash *consistenthash.Map
|
||||
shards map[string]*ringShard // read only
|
||||
list []*ringShard // read only
|
||||
len int
|
||||
closed bool
|
||||
}
|
||||
|
||||
func newRingShards(opt *RingOptions) *ringShards {
|
||||
return &ringShards{
|
||||
opt: opt,
|
||||
|
||||
hash: newConsistentHash(opt),
|
||||
shards: make(map[string]*ringShard),
|
||||
}
|
||||
}
|
||||
|
||||
func (c *ringShards) Add(name string, cl *Client) {
|
||||
shard := &ringShard{Client: cl}
|
||||
c.hash.Add(name)
|
||||
c.shards[name] = shard
|
||||
c.list = append(c.list, shard)
|
||||
}
|
||||
|
||||
func (c *ringShards) List() []*ringShard {
|
||||
c.mu.RLock()
|
||||
list := c.list
|
||||
c.mu.RUnlock()
|
||||
return list
|
||||
}
|
||||
|
||||
func (c *ringShards) Hash(key string) string {
|
||||
c.mu.RLock()
|
||||
hash := c.hash.Get(key)
|
||||
c.mu.RUnlock()
|
||||
return hash
|
||||
}
|
||||
|
||||
func (c *ringShards) GetByKey(key string) (*ringShard, error) {
|
||||
key = hashtag.Key(key)
|
||||
|
||||
c.mu.RLock()
|
||||
|
||||
if c.closed {
|
||||
c.mu.RUnlock()
|
||||
return nil, pool.ErrClosed
|
||||
}
|
||||
|
||||
hash := c.hash.Get(key)
|
||||
if hash == "" {
|
||||
c.mu.RUnlock()
|
||||
return nil, errRingShardsDown
|
||||
}
|
||||
|
||||
shard := c.shards[hash]
|
||||
c.mu.RUnlock()
|
||||
|
||||
return shard, nil
|
||||
}
|
||||
|
||||
func (c *ringShards) GetByHash(name string) (*ringShard, error) {
|
||||
if name == "" {
|
||||
return c.Random()
|
||||
}
|
||||
|
||||
c.mu.RLock()
|
||||
shard := c.shards[name]
|
||||
c.mu.RUnlock()
|
||||
return shard, nil
|
||||
}
|
||||
|
||||
func (c *ringShards) Random() (*ringShard, error) {
|
||||
return c.GetByKey(strconv.Itoa(rand.Int()))
|
||||
}
|
||||
|
||||
// heartbeat monitors state of each shard in the ring.
|
||||
func (c *ringShards) Heartbeat(frequency time.Duration) {
|
||||
ticker := time.NewTicker(frequency)
|
||||
defer ticker.Stop()
|
||||
for range ticker.C {
|
||||
var rebalance bool
|
||||
|
||||
c.mu.RLock()
|
||||
|
||||
if c.closed {
|
||||
c.mu.RUnlock()
|
||||
break
|
||||
}
|
||||
|
||||
shards := c.list
|
||||
c.mu.RUnlock()
|
||||
|
||||
for _, shard := range shards {
|
||||
err := shard.Client.Ping().Err()
|
||||
if shard.Vote(err == nil || err == pool.ErrPoolTimeout) {
|
||||
internal.Logf("ring shard state changed: %s", shard)
|
||||
rebalance = true
|
||||
}
|
||||
}
|
||||
|
||||
if rebalance {
|
||||
c.rebalance()
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// rebalance removes dead shards from the Ring.
|
||||
func (c *ringShards) rebalance() {
|
||||
hash := newConsistentHash(c.opt)
|
||||
var shardsNum int
|
||||
for name, shard := range c.shards {
|
||||
if shard.IsUp() {
|
||||
hash.Add(name)
|
||||
shardsNum++
|
||||
}
|
||||
}
|
||||
|
||||
c.mu.Lock()
|
||||
c.hash = hash
|
||||
c.len = shardsNum
|
||||
c.mu.Unlock()
|
||||
}
|
||||
|
||||
func (c *ringShards) Len() int {
|
||||
c.mu.RLock()
|
||||
l := c.len
|
||||
c.mu.RUnlock()
|
||||
return l
|
||||
}
|
||||
|
||||
func (c *ringShards) Close() error {
|
||||
c.mu.Lock()
|
||||
defer c.mu.Unlock()
|
||||
|
||||
if c.closed {
|
||||
return nil
|
||||
}
|
||||
c.closed = true
|
||||
|
||||
var firstErr error
|
||||
for _, shard := range c.shards {
|
||||
if err := shard.Client.Close(); err != nil && firstErr == nil {
|
||||
firstErr = err
|
||||
}
|
||||
}
|
||||
c.hash = nil
|
||||
c.shards = nil
|
||||
c.list = nil
|
||||
|
||||
return firstErr
|
||||
}
|
||||
|
||||
//------------------------------------------------------------------------------
|
||||
|
||||
// Ring is a Redis client that uses consistent hashing to distribute
|
||||
// keys across multiple Redis servers (shards). It's safe for
|
||||
// concurrent use by multiple goroutines.
|
||||
//
|
||||
// Ring monitors the state of each shard and removes dead shards from
|
||||
// the ring. When a shard comes online it is added back to the ring. This
|
||||
// gives you maximum availability and partition tolerance, but no
|
||||
// consistency between different shards or even clients. Each client
|
||||
// uses shards that are available to the client and does not do any
|
||||
// coordination when shard state is changed.
|
||||
//
|
||||
// Ring should be used when you need multiple Redis servers for caching
|
||||
// and can tolerate losing data when one of the servers dies.
|
||||
// Otherwise you should use Redis Cluster.
|
||||
type Ring struct {
|
||||
cmdable
|
||||
|
||||
ctx context.Context
|
||||
|
||||
opt *RingOptions
|
||||
shards *ringShards
|
||||
cmdsInfoCache *cmdsInfoCache
|
||||
|
||||
process func(Cmder) error
|
||||
processPipeline func([]Cmder) error
|
||||
}
|
||||
|
||||
func NewRing(opt *RingOptions) *Ring {
|
||||
opt.init()
|
||||
|
||||
ring := &Ring{
|
||||
opt: opt,
|
||||
shards: newRingShards(opt),
|
||||
}
|
||||
ring.cmdsInfoCache = newCmdsInfoCache(ring.cmdsInfo)
|
||||
|
||||
ring.process = ring.defaultProcess
|
||||
ring.processPipeline = ring.defaultProcessPipeline
|
||||
ring.cmdable.setProcessor(ring.Process)
|
||||
|
||||
for name, addr := range opt.Addrs {
|
||||
clopt := opt.clientOptions()
|
||||
clopt.Addr = addr
|
||||
ring.shards.Add(name, NewClient(clopt))
|
||||
}
|
||||
|
||||
go ring.shards.Heartbeat(opt.HeartbeatFrequency)
|
||||
|
||||
return ring
|
||||
}
|
||||
|
||||
func (c *Ring) Context() context.Context {
|
||||
if c.ctx != nil {
|
||||
return c.ctx
|
||||
}
|
||||
return context.Background()
|
||||
}
|
||||
|
||||
func (c *Ring) WithContext(ctx context.Context) *Ring {
|
||||
if ctx == nil {
|
||||
panic("nil context")
|
||||
}
|
||||
c2 := c.copy()
|
||||
c2.ctx = ctx
|
||||
return c2
|
||||
}
|
||||
|
||||
func (c *Ring) copy() *Ring {
|
||||
cp := *c
|
||||
return &cp
|
||||
}
|
||||
|
||||
// Options returns read-only Options that were used to create the client.
|
||||
func (c *Ring) Options() *RingOptions {
|
||||
return c.opt
|
||||
}
|
||||
|
||||
func (c *Ring) retryBackoff(attempt int) time.Duration {
|
||||
return internal.RetryBackoff(attempt, c.opt.MinRetryBackoff, c.opt.MaxRetryBackoff)
|
||||
}
|
||||
|
||||
// PoolStats returns accumulated connection pool stats.
|
||||
func (c *Ring) PoolStats() *PoolStats {
|
||||
shards := c.shards.List()
|
||||
var acc PoolStats
|
||||
for _, shard := range shards {
|
||||
s := shard.Client.connPool.Stats()
|
||||
acc.Hits += s.Hits
|
||||
acc.Misses += s.Misses
|
||||
acc.Timeouts += s.Timeouts
|
||||
acc.TotalConns += s.TotalConns
|
||||
acc.IdleConns += s.IdleConns
|
||||
}
|
||||
return &acc
|
||||
}
|
||||
|
||||
// Len returns the current number of shards in the ring.
|
||||
func (c *Ring) Len() int {
|
||||
return c.shards.Len()
|
||||
}
|
||||
|
||||
// Subscribe subscribes the client to the specified channels.
|
||||
func (c *Ring) Subscribe(channels ...string) *PubSub {
|
||||
if len(channels) == 0 {
|
||||
panic("at least one channel is required")
|
||||
}
|
||||
|
||||
shard, err := c.shards.GetByKey(channels[0])
|
||||
if err != nil {
|
||||
// TODO: return PubSub with sticky error
|
||||
panic(err)
|
||||
}
|
||||
return shard.Client.Subscribe(channels...)
|
||||
}
|
||||
|
||||
// PSubscribe subscribes the client to the given patterns.
|
||||
func (c *Ring) PSubscribe(channels ...string) *PubSub {
|
||||
if len(channels) == 0 {
|
||||
panic("at least one channel is required")
|
||||
}
|
||||
|
||||
shard, err := c.shards.GetByKey(channels[0])
|
||||
if err != nil {
|
||||
// TODO: return PubSub with sticky error
|
||||
panic(err)
|
||||
}
|
||||
return shard.Client.PSubscribe(channels...)
|
||||
}
|
||||
|
||||
// ForEachShard concurrently calls the fn on each live shard in the ring.
|
||||
// It returns the first error if any.
|
||||
func (c *Ring) ForEachShard(fn func(client *Client) error) error {
|
||||
shards := c.shards.List()
|
||||
var wg sync.WaitGroup
|
||||
errCh := make(chan error, 1)
|
||||
for _, shard := range shards {
|
||||
if shard.IsDown() {
|
||||
continue
|
||||
}
|
||||
|
||||
wg.Add(1)
|
||||
go func(shard *ringShard) {
|
||||
defer wg.Done()
|
||||
err := fn(shard.Client)
|
||||
if err != nil {
|
||||
select {
|
||||
case errCh <- err:
|
||||
default:
|
||||
}
|
||||
}
|
||||
}(shard)
|
||||
}
|
||||
wg.Wait()
|
||||
|
||||
select {
|
||||
case err := <-errCh:
|
||||
return err
|
||||
default:
|
||||
return nil
|
||||
}
|
||||
}
|
||||
|
||||
func (c *Ring) cmdsInfo() (map[string]*CommandInfo, error) {
|
||||
shards := c.shards.List()
|
||||
firstErr := errRingShardsDown
|
||||
for _, shard := range shards {
|
||||
cmdsInfo, err := shard.Client.Command().Result()
|
||||
if err == nil {
|
||||
return cmdsInfo, nil
|
||||
}
|
||||
if firstErr == nil {
|
||||
firstErr = err
|
||||
}
|
||||
}
|
||||
return nil, firstErr
|
||||
}
|
||||
|
||||
func (c *Ring) cmdInfo(name string) *CommandInfo {
|
||||
cmdsInfo, err := c.cmdsInfoCache.Get()
|
||||
if err != nil {
|
||||
return nil
|
||||
}
|
||||
info := cmdsInfo[name]
|
||||
if info == nil {
|
||||
internal.Logf("info for cmd=%s not found", name)
|
||||
}
|
||||
return info
|
||||
}
|
||||
|
||||
func (c *Ring) cmdShard(cmd Cmder) (*ringShard, error) {
|
||||
cmdInfo := c.cmdInfo(cmd.Name())
|
||||
pos := cmdFirstKeyPos(cmd, cmdInfo)
|
||||
if pos == 0 {
|
||||
return c.shards.Random()
|
||||
}
|
||||
firstKey := cmd.stringArg(pos)
|
||||
return c.shards.GetByKey(firstKey)
|
||||
}
|
||||
|
||||
// Do creates a Cmd from the args and processes the cmd.
|
||||
func (c *Ring) Do(args ...interface{}) *Cmd {
|
||||
cmd := NewCmd(args...)
|
||||
c.Process(cmd)
|
||||
return cmd
|
||||
}
|
||||
|
||||
func (c *Ring) WrapProcess(
|
||||
fn func(oldProcess func(cmd Cmder) error) func(cmd Cmder) error,
|
||||
) {
|
||||
c.process = fn(c.process)
|
||||
}
|
||||
|
||||
func (c *Ring) Process(cmd Cmder) error {
|
||||
return c.process(cmd)
|
||||
}
|
||||
|
||||
func (c *Ring) defaultProcess(cmd Cmder) error {
|
||||
for attempt := 0; attempt <= c.opt.MaxRetries; attempt++ {
|
||||
if attempt > 0 {
|
||||
time.Sleep(c.retryBackoff(attempt))
|
||||
}
|
||||
|
||||
shard, err := c.cmdShard(cmd)
|
||||
if err != nil {
|
||||
cmd.setErr(err)
|
||||
return err
|
||||
}
|
||||
|
||||
err = shard.Client.Process(cmd)
|
||||
if err == nil {
|
||||
return nil
|
||||
}
|
||||
if !internal.IsRetryableError(err, cmd.readTimeout() == nil) {
|
||||
return err
|
||||
}
|
||||
}
|
||||
return cmd.Err()
|
||||
}
|
||||
|
||||
func (c *Ring) Pipeline() Pipeliner {
|
||||
pipe := Pipeline{
|
||||
exec: c.processPipeline,
|
||||
}
|
||||
pipe.cmdable.setProcessor(pipe.Process)
|
||||
return &pipe
|
||||
}
|
||||
|
||||
func (c *Ring) Pipelined(fn func(Pipeliner) error) ([]Cmder, error) {
|
||||
return c.Pipeline().Pipelined(fn)
|
||||
}
|
||||
|
||||
func (c *Ring) WrapProcessPipeline(
|
||||
fn func(oldProcess func([]Cmder) error) func([]Cmder) error,
|
||||
) {
|
||||
c.processPipeline = fn(c.processPipeline)
|
||||
}
|
||||
|
||||
func (c *Ring) defaultProcessPipeline(cmds []Cmder) error {
|
||||
cmdsMap := make(map[string][]Cmder)
|
||||
for _, cmd := range cmds {
|
||||
cmdInfo := c.cmdInfo(cmd.Name())
|
||||
hash := cmd.stringArg(cmdFirstKeyPos(cmd, cmdInfo))
|
||||
if hash != "" {
|
||||
hash = c.shards.Hash(hashtag.Key(hash))
|
||||
}
|
||||
cmdsMap[hash] = append(cmdsMap[hash], cmd)
|
||||
}
|
||||
|
||||
for attempt := 0; attempt <= c.opt.MaxRetries; attempt++ {
|
||||
if attempt > 0 {
|
||||
time.Sleep(c.retryBackoff(attempt))
|
||||
}
|
||||
|
||||
var mu sync.Mutex
|
||||
var failedCmdsMap map[string][]Cmder
|
||||
var wg sync.WaitGroup
|
||||
|
||||
for hash, cmds := range cmdsMap {
|
||||
wg.Add(1)
|
||||
go func(hash string, cmds []Cmder) {
|
||||
defer wg.Done()
|
||||
|
||||
shard, err := c.shards.GetByHash(hash)
|
||||
if err != nil {
|
||||
setCmdsErr(cmds, err)
|
||||
return
|
||||
}
|
||||
|
||||
cn, err := shard.Client.getConn()
|
||||
if err != nil {
|
||||
setCmdsErr(cmds, err)
|
||||
return
|
||||
}
|
||||
|
||||
canRetry, err := shard.Client.pipelineProcessCmds(cn, cmds)
|
||||
shard.Client.releaseConnStrict(cn, err)
|
||||
|
||||
if canRetry && internal.IsRetryableError(err, true) {
|
||||
mu.Lock()
|
||||
if failedCmdsMap == nil {
|
||||
failedCmdsMap = make(map[string][]Cmder)
|
||||
}
|
||||
failedCmdsMap[hash] = cmds
|
||||
mu.Unlock()
|
||||
}
|
||||
}(hash, cmds)
|
||||
}
|
||||
|
||||
wg.Wait()
|
||||
if len(failedCmdsMap) == 0 {
|
||||
break
|
||||
}
|
||||
cmdsMap = failedCmdsMap
|
||||
}
|
||||
|
||||
return cmdsFirstErr(cmds)
|
||||
}
|
||||
|
||||
func (c *Ring) TxPipeline() Pipeliner {
|
||||
panic("not implemented")
|
||||
}
|
||||
|
||||
func (c *Ring) TxPipelined(fn func(Pipeliner) error) ([]Cmder, error) {
|
||||
panic("not implemented")
|
||||
}
|
||||
|
||||
// Close closes the ring client, releasing any open resources.
|
||||
//
|
||||
// It is rare to Close a Ring, as the Ring is meant to be long-lived
|
||||
// and shared between many goroutines.
|
||||
func (c *Ring) Close() error {
|
||||
return c.shards.Close()
|
||||
}
|
||||
|
||||
func newConsistentHash(opt *RingOptions) *consistenthash.Map {
|
||||
return consistenthash.New(opt.HashReplicas, consistenthash.Hash(opt.Hash))
|
||||
}
|
||||
|
|
@ -0,0 +1,62 @@
|
|||
package redis
|
||||
|
||||
import (
|
||||
"crypto/sha1"
|
||||
"encoding/hex"
|
||||
"io"
|
||||
"strings"
|
||||
)
|
||||
|
||||
type scripter interface {
|
||||
Eval(script string, keys []string, args ...interface{}) *Cmd
|
||||
EvalSha(sha1 string, keys []string, args ...interface{}) *Cmd
|
||||
ScriptExists(hashes ...string) *BoolSliceCmd
|
||||
ScriptLoad(script string) *StringCmd
|
||||
}
|
||||
|
||||
var _ scripter = (*Client)(nil)
|
||||
var _ scripter = (*Ring)(nil)
|
||||
var _ scripter = (*ClusterClient)(nil)
|
||||
|
||||
type Script struct {
|
||||
src, hash string
|
||||
}
|
||||
|
||||
func NewScript(src string) *Script {
|
||||
h := sha1.New()
|
||||
io.WriteString(h, src)
|
||||
return &Script{
|
||||
src: src,
|
||||
hash: hex.EncodeToString(h.Sum(nil)),
|
||||
}
|
||||
}
|
||||
|
||||
func (s *Script) Hash() string {
|
||||
return s.hash
|
||||
}
|
||||
|
||||
func (s *Script) Load(c scripter) *StringCmd {
|
||||
return c.ScriptLoad(s.src)
|
||||
}
|
||||
|
||||
func (s *Script) Exists(c scripter) *BoolSliceCmd {
|
||||
return c.ScriptExists(s.hash)
|
||||
}
|
||||
|
||||
func (s *Script) Eval(c scripter, keys []string, args ...interface{}) *Cmd {
|
||||
return c.Eval(s.src, keys, args...)
|
||||
}
|
||||
|
||||
func (s *Script) EvalSha(c scripter, keys []string, args ...interface{}) *Cmd {
|
||||
return c.EvalSha(s.hash, keys, args...)
|
||||
}
|
||||
|
||||
// Run optimistically uses EVALSHA to run the script. If script does not exist
|
||||
// it is retried using EVAL.
|
||||
func (s *Script) Run(c scripter, keys []string, args ...interface{}) *Cmd {
|
||||
r := s.EvalSha(c, keys, args...)
|
||||
if err := r.Err(); err != nil && strings.HasPrefix(err.Error(), "NOSCRIPT ") {
|
||||
return s.Eval(c, keys, args...)
|
||||
}
|
||||
return r
|
||||
}
|
||||
|
|
@ -0,0 +1,399 @@
|
|||
package redis
|
||||
|
||||
import (
|
||||
"crypto/tls"
|
||||
"errors"
|
||||
"net"
|
||||
"strings"
|
||||
"sync"
|
||||
"time"
|
||||
|
||||
"github.com/go-redis/redis/internal"
|
||||
"github.com/go-redis/redis/internal/pool"
|
||||
)
|
||||
|
||||
//------------------------------------------------------------------------------
|
||||
|
||||
// FailoverOptions are used to configure a failover client and should
|
||||
// be passed to NewFailoverClient.
|
||||
type FailoverOptions struct {
|
||||
// The master name.
|
||||
MasterName string
|
||||
// A seed list of host:port addresses of sentinel nodes.
|
||||
SentinelAddrs []string
|
||||
|
||||
// Following options are copied from Options struct.
|
||||
|
||||
OnConnect func(*Conn) error
|
||||
|
||||
Password string
|
||||
DB int
|
||||
|
||||
MaxRetries int
|
||||
MinRetryBackoff time.Duration
|
||||
MaxRetryBackoff time.Duration
|
||||
|
||||
DialTimeout time.Duration
|
||||
ReadTimeout time.Duration
|
||||
WriteTimeout time.Duration
|
||||
|
||||
PoolSize int
|
||||
MinIdleConns int
|
||||
MaxConnAge time.Duration
|
||||
PoolTimeout time.Duration
|
||||
IdleTimeout time.Duration
|
||||
IdleCheckFrequency time.Duration
|
||||
|
||||
TLSConfig *tls.Config
|
||||
}
|
||||
|
||||
func (opt *FailoverOptions) options() *Options {
|
||||
return &Options{
|
||||
Addr: "FailoverClient",
|
||||
|
||||
OnConnect: opt.OnConnect,
|
||||
|
||||
DB: opt.DB,
|
||||
Password: opt.Password,
|
||||
|
||||
MaxRetries: opt.MaxRetries,
|
||||
|
||||
DialTimeout: opt.DialTimeout,
|
||||
ReadTimeout: opt.ReadTimeout,
|
||||
WriteTimeout: opt.WriteTimeout,
|
||||
|
||||
PoolSize: opt.PoolSize,
|
||||
PoolTimeout: opt.PoolTimeout,
|
||||
IdleTimeout: opt.IdleTimeout,
|
||||
IdleCheckFrequency: opt.IdleCheckFrequency,
|
||||
|
||||
TLSConfig: opt.TLSConfig,
|
||||
}
|
||||
}
|
||||
|
||||
// NewFailoverClient returns a Redis client that uses Redis Sentinel
|
||||
// for automatic failover. It's safe for concurrent use by multiple
|
||||
// goroutines.
|
||||
func NewFailoverClient(failoverOpt *FailoverOptions) *Client {
|
||||
opt := failoverOpt.options()
|
||||
opt.init()
|
||||
|
||||
failover := &sentinelFailover{
|
||||
masterName: failoverOpt.MasterName,
|
||||
sentinelAddrs: failoverOpt.SentinelAddrs,
|
||||
|
||||
opt: opt,
|
||||
}
|
||||
|
||||
c := Client{
|
||||
baseClient: baseClient{
|
||||
opt: opt,
|
||||
connPool: failover.Pool(),
|
||||
|
||||
onClose: func() error {
|
||||
return failover.Close()
|
||||
},
|
||||
},
|
||||
}
|
||||
c.baseClient.init()
|
||||
c.cmdable.setProcessor(c.Process)
|
||||
|
||||
return &c
|
||||
}
|
||||
|
||||
//------------------------------------------------------------------------------
|
||||
|
||||
type SentinelClient struct {
|
||||
baseClient
|
||||
}
|
||||
|
||||
func NewSentinelClient(opt *Options) *SentinelClient {
|
||||
opt.init()
|
||||
c := &SentinelClient{
|
||||
baseClient: baseClient{
|
||||
opt: opt,
|
||||
connPool: newConnPool(opt),
|
||||
},
|
||||
}
|
||||
c.baseClient.init()
|
||||
return c
|
||||
}
|
||||
|
||||
func (c *SentinelClient) pubSub() *PubSub {
|
||||
pubsub := &PubSub{
|
||||
opt: c.opt,
|
||||
|
||||
newConn: func(channels []string) (*pool.Conn, error) {
|
||||
return c.newConn()
|
||||
},
|
||||
closeConn: c.connPool.CloseConn,
|
||||
}
|
||||
pubsub.init()
|
||||
return pubsub
|
||||
}
|
||||
|
||||
// Subscribe subscribes the client to the specified channels.
|
||||
// Channels can be omitted to create empty subscription.
|
||||
func (c *SentinelClient) Subscribe(channels ...string) *PubSub {
|
||||
pubsub := c.pubSub()
|
||||
if len(channels) > 0 {
|
||||
_ = pubsub.Subscribe(channels...)
|
||||
}
|
||||
return pubsub
|
||||
}
|
||||
|
||||
// PSubscribe subscribes the client to the given patterns.
|
||||
// Patterns can be omitted to create empty subscription.
|
||||
func (c *SentinelClient) PSubscribe(channels ...string) *PubSub {
|
||||
pubsub := c.pubSub()
|
||||
if len(channels) > 0 {
|
||||
_ = pubsub.PSubscribe(channels...)
|
||||
}
|
||||
return pubsub
|
||||
}
|
||||
|
||||
func (c *SentinelClient) GetMasterAddrByName(name string) *StringSliceCmd {
|
||||
cmd := NewStringSliceCmd("sentinel", "get-master-addr-by-name", name)
|
||||
c.Process(cmd)
|
||||
return cmd
|
||||
}
|
||||
|
||||
func (c *SentinelClient) Sentinels(name string) *SliceCmd {
|
||||
cmd := NewSliceCmd("sentinel", "sentinels", name)
|
||||
c.Process(cmd)
|
||||
return cmd
|
||||
}
|
||||
|
||||
// Failover forces a failover as if the master was not reachable, and without
|
||||
// asking for agreement to other Sentinels.
|
||||
func (c *SentinelClient) Failover(name string) *StatusCmd {
|
||||
cmd := NewStatusCmd("sentinel", "failover", name)
|
||||
c.Process(cmd)
|
||||
return cmd
|
||||
}
|
||||
|
||||
// Reset resets all the masters with matching name. The pattern argument is a
|
||||
// glob-style pattern. The reset process clears any previous state in a master
|
||||
// (including a failover in progress), and removes every slave and sentinel
|
||||
// already discovered and associated with the master.
|
||||
func (c *SentinelClient) Reset(pattern string) *IntCmd {
|
||||
cmd := NewIntCmd("sentinel", "reset", pattern)
|
||||
c.Process(cmd)
|
||||
return cmd
|
||||
}
|
||||
|
||||
type sentinelFailover struct {
|
||||
sentinelAddrs []string
|
||||
|
||||
opt *Options
|
||||
|
||||
pool *pool.ConnPool
|
||||
poolOnce sync.Once
|
||||
|
||||
mu sync.RWMutex
|
||||
masterName string
|
||||
_masterAddr string
|
||||
sentinel *SentinelClient
|
||||
pubsub *PubSub
|
||||
}
|
||||
|
||||
func (c *sentinelFailover) Close() error {
|
||||
c.mu.Lock()
|
||||
defer c.mu.Unlock()
|
||||
if c.sentinel != nil {
|
||||
return c.closeSentinel()
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
func (c *sentinelFailover) Pool() *pool.ConnPool {
|
||||
c.poolOnce.Do(func() {
|
||||
c.opt.Dialer = c.dial
|
||||
c.pool = newConnPool(c.opt)
|
||||
})
|
||||
return c.pool
|
||||
}
|
||||
|
||||
func (c *sentinelFailover) dial() (net.Conn, error) {
|
||||
addr, err := c.MasterAddr()
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
return net.DialTimeout("tcp", addr, c.opt.DialTimeout)
|
||||
}
|
||||
|
||||
func (c *sentinelFailover) MasterAddr() (string, error) {
|
||||
addr, err := c.masterAddr()
|
||||
if err != nil {
|
||||
return "", err
|
||||
}
|
||||
c.switchMaster(addr)
|
||||
return addr, nil
|
||||
}
|
||||
|
||||
func (c *sentinelFailover) masterAddr() (string, error) {
|
||||
addr := c.getMasterAddr()
|
||||
if addr != "" {
|
||||
return addr, nil
|
||||
}
|
||||
|
||||
c.mu.Lock()
|
||||
defer c.mu.Unlock()
|
||||
|
||||
for i, sentinelAddr := range c.sentinelAddrs {
|
||||
sentinel := NewSentinelClient(&Options{
|
||||
Addr: sentinelAddr,
|
||||
|
||||
MaxRetries: c.opt.MaxRetries,
|
||||
|
||||
DialTimeout: c.opt.DialTimeout,
|
||||
ReadTimeout: c.opt.ReadTimeout,
|
||||
WriteTimeout: c.opt.WriteTimeout,
|
||||
|
||||
PoolSize: c.opt.PoolSize,
|
||||
PoolTimeout: c.opt.PoolTimeout,
|
||||
IdleTimeout: c.opt.IdleTimeout,
|
||||
IdleCheckFrequency: c.opt.IdleCheckFrequency,
|
||||
|
||||
TLSConfig: c.opt.TLSConfig,
|
||||
})
|
||||
|
||||
masterAddr, err := sentinel.GetMasterAddrByName(c.masterName).Result()
|
||||
if err != nil {
|
||||
internal.Logf("sentinel: GetMasterAddrByName master=%q failed: %s",
|
||||
c.masterName, err)
|
||||
_ = sentinel.Close()
|
||||
continue
|
||||
}
|
||||
|
||||
// Push working sentinel to the top.
|
||||
c.sentinelAddrs[0], c.sentinelAddrs[i] = c.sentinelAddrs[i], c.sentinelAddrs[0]
|
||||
c.setSentinel(sentinel)
|
||||
|
||||
addr := net.JoinHostPort(masterAddr[0], masterAddr[1])
|
||||
return addr, nil
|
||||
}
|
||||
|
||||
return "", errors.New("redis: all sentinels are unreachable")
|
||||
}
|
||||
|
||||
func (c *sentinelFailover) getMasterAddr() string {
|
||||
c.mu.RLock()
|
||||
sentinel := c.sentinel
|
||||
c.mu.RUnlock()
|
||||
|
||||
if sentinel == nil {
|
||||
return ""
|
||||
}
|
||||
|
||||
addr, err := sentinel.GetMasterAddrByName(c.masterName).Result()
|
||||
if err != nil {
|
||||
internal.Logf("sentinel: GetMasterAddrByName name=%q failed: %s",
|
||||
c.masterName, err)
|
||||
c.mu.Lock()
|
||||
if c.sentinel == sentinel {
|
||||
c.closeSentinel()
|
||||
}
|
||||
c.mu.Unlock()
|
||||
return ""
|
||||
}
|
||||
|
||||
return net.JoinHostPort(addr[0], addr[1])
|
||||
}
|
||||
|
||||
func (c *sentinelFailover) switchMaster(addr string) {
|
||||
c.mu.RLock()
|
||||
masterAddr := c._masterAddr
|
||||
c.mu.RUnlock()
|
||||
if masterAddr == addr {
|
||||
return
|
||||
}
|
||||
|
||||
c.mu.Lock()
|
||||
defer c.mu.Unlock()
|
||||
|
||||
internal.Logf("sentinel: new master=%q addr=%q",
|
||||
c.masterName, addr)
|
||||
_ = c.Pool().Filter(func(cn *pool.Conn) bool {
|
||||
return cn.RemoteAddr().String() != addr
|
||||
})
|
||||
c._masterAddr = addr
|
||||
}
|
||||
|
||||
func (c *sentinelFailover) setSentinel(sentinel *SentinelClient) {
|
||||
c.discoverSentinels(sentinel)
|
||||
c.sentinel = sentinel
|
||||
|
||||
c.pubsub = sentinel.Subscribe("+switch-master")
|
||||
go c.listen(c.pubsub)
|
||||
}
|
||||
|
||||
func (c *sentinelFailover) closeSentinel() error {
|
||||
var firstErr error
|
||||
|
||||
err := c.pubsub.Close()
|
||||
if err != nil && firstErr == err {
|
||||
firstErr = err
|
||||
}
|
||||
c.pubsub = nil
|
||||
|
||||
err = c.sentinel.Close()
|
||||
if err != nil && firstErr == err {
|
||||
firstErr = err
|
||||
}
|
||||
c.sentinel = nil
|
||||
|
||||
return firstErr
|
||||
}
|
||||
|
||||
func (c *sentinelFailover) discoverSentinels(sentinel *SentinelClient) {
|
||||
sentinels, err := sentinel.Sentinels(c.masterName).Result()
|
||||
if err != nil {
|
||||
internal.Logf("sentinel: Sentinels master=%q failed: %s", c.masterName, err)
|
||||
return
|
||||
}
|
||||
for _, sentinel := range sentinels {
|
||||
vals := sentinel.([]interface{})
|
||||
for i := 0; i < len(vals); i += 2 {
|
||||
key := vals[i].(string)
|
||||
if key == "name" {
|
||||
sentinelAddr := vals[i+1].(string)
|
||||
if !contains(c.sentinelAddrs, sentinelAddr) {
|
||||
internal.Logf("sentinel: discovered new sentinel=%q for master=%q",
|
||||
sentinelAddr, c.masterName)
|
||||
c.sentinelAddrs = append(c.sentinelAddrs, sentinelAddr)
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func (c *sentinelFailover) listen(pubsub *PubSub) {
|
||||
ch := pubsub.Channel()
|
||||
for {
|
||||
msg, ok := <-ch
|
||||
if !ok {
|
||||
break
|
||||
}
|
||||
|
||||
switch msg.Channel {
|
||||
case "+switch-master":
|
||||
parts := strings.Split(msg.Payload, " ")
|
||||
if parts[0] != c.masterName {
|
||||
internal.Logf("sentinel: ignore addr for master=%q", parts[0])
|
||||
continue
|
||||
}
|
||||
addr := net.JoinHostPort(parts[3], parts[4])
|
||||
c.switchMaster(addr)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func contains(slice []string, str string) bool {
|
||||
for _, s := range slice {
|
||||
if s == str {
|
||||
return true
|
||||
}
|
||||
}
|
||||
return false
|
||||
}
|
||||
|
|
@ -0,0 +1,110 @@
|
|||
package redis
|
||||
|
||||
import (
|
||||
"github.com/go-redis/redis/internal/pool"
|
||||
"github.com/go-redis/redis/internal/proto"
|
||||
)
|
||||
|
||||
// TxFailedErr transaction redis failed.
|
||||
const TxFailedErr = proto.RedisError("redis: transaction failed")
|
||||
|
||||
// Tx implements Redis transactions as described in
|
||||
// http://redis.io/topics/transactions. It's NOT safe for concurrent use
|
||||
// by multiple goroutines, because Exec resets list of watched keys.
|
||||
// If you don't need WATCH it is better to use Pipeline.
|
||||
type Tx struct {
|
||||
statefulCmdable
|
||||
baseClient
|
||||
}
|
||||
|
||||
func (c *Client) newTx() *Tx {
|
||||
tx := Tx{
|
||||
baseClient: baseClient{
|
||||
opt: c.opt,
|
||||
connPool: pool.NewStickyConnPool(c.connPool.(*pool.ConnPool), true),
|
||||
},
|
||||
}
|
||||
tx.baseClient.init()
|
||||
tx.statefulCmdable.setProcessor(tx.Process)
|
||||
return &tx
|
||||
}
|
||||
|
||||
// Watch prepares a transaction and marks the keys to be watched
|
||||
// for conditional execution if there are any keys.
|
||||
//
|
||||
// The transaction is automatically closed when fn exits.
|
||||
func (c *Client) Watch(fn func(*Tx) error, keys ...string) error {
|
||||
tx := c.newTx()
|
||||
if len(keys) > 0 {
|
||||
if err := tx.Watch(keys...).Err(); err != nil {
|
||||
_ = tx.Close()
|
||||
return err
|
||||
}
|
||||
}
|
||||
|
||||
err := fn(tx)
|
||||
_ = tx.Close()
|
||||
return err
|
||||
}
|
||||
|
||||
// Close closes the transaction, releasing any open resources.
|
||||
func (c *Tx) Close() error {
|
||||
_ = c.Unwatch().Err()
|
||||
return c.baseClient.Close()
|
||||
}
|
||||
|
||||
// Watch marks the keys to be watched for conditional execution
|
||||
// of a transaction.
|
||||
func (c *Tx) Watch(keys ...string) *StatusCmd {
|
||||
args := make([]interface{}, 1+len(keys))
|
||||
args[0] = "watch"
|
||||
for i, key := range keys {
|
||||
args[1+i] = key
|
||||
}
|
||||
cmd := NewStatusCmd(args...)
|
||||
c.Process(cmd)
|
||||
return cmd
|
||||
}
|
||||
|
||||
// Unwatch flushes all the previously watched keys for a transaction.
|
||||
func (c *Tx) Unwatch(keys ...string) *StatusCmd {
|
||||
args := make([]interface{}, 1+len(keys))
|
||||
args[0] = "unwatch"
|
||||
for i, key := range keys {
|
||||
args[1+i] = key
|
||||
}
|
||||
cmd := NewStatusCmd(args...)
|
||||
c.Process(cmd)
|
||||
return cmd
|
||||
}
|
||||
|
||||
// Pipeline creates a new pipeline. It is more convenient to use Pipelined.
|
||||
func (c *Tx) Pipeline() Pipeliner {
|
||||
pipe := Pipeline{
|
||||
exec: c.processTxPipeline,
|
||||
}
|
||||
pipe.statefulCmdable.setProcessor(pipe.Process)
|
||||
return &pipe
|
||||
}
|
||||
|
||||
// Pipelined executes commands queued in the fn in a transaction.
|
||||
//
|
||||
// When using WATCH, EXEC will execute commands only if the watched keys
|
||||
// were not modified, allowing for a check-and-set mechanism.
|
||||
//
|
||||
// Exec always returns list of commands. If transaction fails
|
||||
// TxFailedErr is returned. Otherwise Exec returns an error of the first
|
||||
// failed command or nil.
|
||||
func (c *Tx) Pipelined(fn func(Pipeliner) error) ([]Cmder, error) {
|
||||
return c.Pipeline().Pipelined(fn)
|
||||
}
|
||||
|
||||
// TxPipelined is an alias for Pipelined.
|
||||
func (c *Tx) TxPipelined(fn func(Pipeliner) error) ([]Cmder, error) {
|
||||
return c.Pipelined(fn)
|
||||
}
|
||||
|
||||
// TxPipeline is an alias for Pipeline.
|
||||
func (c *Tx) TxPipeline() Pipeliner {
|
||||
return c.Pipeline()
|
||||
}
|
||||
|
|
@ -0,0 +1,179 @@
|
|||
package redis
|
||||
|
||||
import (
|
||||
"crypto/tls"
|
||||
"time"
|
||||
)
|
||||
|
||||
// UniversalOptions information is required by UniversalClient to establish
|
||||
// connections.
|
||||
type UniversalOptions struct {
|
||||
// Either a single address or a seed list of host:port addresses
|
||||
// of cluster/sentinel nodes.
|
||||
Addrs []string
|
||||
|
||||
// Database to be selected after connecting to the server.
|
||||
// Only single-node and failover clients.
|
||||
DB int
|
||||
|
||||
// Common options.
|
||||
|
||||
OnConnect func(*Conn) error
|
||||
Password string
|
||||
MaxRetries int
|
||||
MinRetryBackoff time.Duration
|
||||
MaxRetryBackoff time.Duration
|
||||
DialTimeout time.Duration
|
||||
ReadTimeout time.Duration
|
||||
WriteTimeout time.Duration
|
||||
PoolSize int
|
||||
MinIdleConns int
|
||||
MaxConnAge time.Duration
|
||||
PoolTimeout time.Duration
|
||||
IdleTimeout time.Duration
|
||||
IdleCheckFrequency time.Duration
|
||||
TLSConfig *tls.Config
|
||||
|
||||
// Only cluster clients.
|
||||
|
||||
MaxRedirects int
|
||||
ReadOnly bool
|
||||
RouteByLatency bool
|
||||
RouteRandomly bool
|
||||
|
||||
// The sentinel master name.
|
||||
// Only failover clients.
|
||||
MasterName string
|
||||
}
|
||||
|
||||
func (o *UniversalOptions) cluster() *ClusterOptions {
|
||||
if len(o.Addrs) == 0 {
|
||||
o.Addrs = []string{"127.0.0.1:6379"}
|
||||
}
|
||||
|
||||
return &ClusterOptions{
|
||||
Addrs: o.Addrs,
|
||||
OnConnect: o.OnConnect,
|
||||
|
||||
Password: o.Password,
|
||||
|
||||
MaxRedirects: o.MaxRedirects,
|
||||
ReadOnly: o.ReadOnly,
|
||||
RouteByLatency: o.RouteByLatency,
|
||||
RouteRandomly: o.RouteRandomly,
|
||||
|
||||
MaxRetries: o.MaxRetries,
|
||||
MinRetryBackoff: o.MinRetryBackoff,
|
||||
MaxRetryBackoff: o.MaxRetryBackoff,
|
||||
|
||||
DialTimeout: o.DialTimeout,
|
||||
ReadTimeout: o.ReadTimeout,
|
||||
WriteTimeout: o.WriteTimeout,
|
||||
PoolSize: o.PoolSize,
|
||||
MinIdleConns: o.MinIdleConns,
|
||||
MaxConnAge: o.MaxConnAge,
|
||||
PoolTimeout: o.PoolTimeout,
|
||||
IdleTimeout: o.IdleTimeout,
|
||||
IdleCheckFrequency: o.IdleCheckFrequency,
|
||||
|
||||
TLSConfig: o.TLSConfig,
|
||||
}
|
||||
}
|
||||
|
||||
func (o *UniversalOptions) failover() *FailoverOptions {
|
||||
if len(o.Addrs) == 0 {
|
||||
o.Addrs = []string{"127.0.0.1:26379"}
|
||||
}
|
||||
|
||||
return &FailoverOptions{
|
||||
SentinelAddrs: o.Addrs,
|
||||
MasterName: o.MasterName,
|
||||
OnConnect: o.OnConnect,
|
||||
|
||||
DB: o.DB,
|
||||
Password: o.Password,
|
||||
|
||||
MaxRetries: o.MaxRetries,
|
||||
MinRetryBackoff: o.MinRetryBackoff,
|
||||
MaxRetryBackoff: o.MaxRetryBackoff,
|
||||
|
||||
DialTimeout: o.DialTimeout,
|
||||
ReadTimeout: o.ReadTimeout,
|
||||
WriteTimeout: o.WriteTimeout,
|
||||
|
||||
PoolSize: o.PoolSize,
|
||||
MinIdleConns: o.MinIdleConns,
|
||||
MaxConnAge: o.MaxConnAge,
|
||||
PoolTimeout: o.PoolTimeout,
|
||||
IdleTimeout: o.IdleTimeout,
|
||||
IdleCheckFrequency: o.IdleCheckFrequency,
|
||||
|
||||
TLSConfig: o.TLSConfig,
|
||||
}
|
||||
}
|
||||
|
||||
func (o *UniversalOptions) simple() *Options {
|
||||
addr := "127.0.0.1:6379"
|
||||
if len(o.Addrs) > 0 {
|
||||
addr = o.Addrs[0]
|
||||
}
|
||||
|
||||
return &Options{
|
||||
Addr: addr,
|
||||
OnConnect: o.OnConnect,
|
||||
|
||||
DB: o.DB,
|
||||
Password: o.Password,
|
||||
|
||||
MaxRetries: o.MaxRetries,
|
||||
MinRetryBackoff: o.MinRetryBackoff,
|
||||
MaxRetryBackoff: o.MaxRetryBackoff,
|
||||
|
||||
DialTimeout: o.DialTimeout,
|
||||
ReadTimeout: o.ReadTimeout,
|
||||
WriteTimeout: o.WriteTimeout,
|
||||
|
||||
PoolSize: o.PoolSize,
|
||||
MinIdleConns: o.MinIdleConns,
|
||||
MaxConnAge: o.MaxConnAge,
|
||||
PoolTimeout: o.PoolTimeout,
|
||||
IdleTimeout: o.IdleTimeout,
|
||||
IdleCheckFrequency: o.IdleCheckFrequency,
|
||||
|
||||
TLSConfig: o.TLSConfig,
|
||||
}
|
||||
}
|
||||
|
||||
// --------------------------------------------------------------------
|
||||
|
||||
// UniversalClient is an abstract client which - based on the provided options -
|
||||
// can connect to either clusters, or sentinel-backed failover instances or simple
|
||||
// single-instance servers. This can be useful for testing cluster-specific
|
||||
// applications locally.
|
||||
type UniversalClient interface {
|
||||
Cmdable
|
||||
Watch(fn func(*Tx) error, keys ...string) error
|
||||
Process(cmd Cmder) error
|
||||
WrapProcess(fn func(oldProcess func(cmd Cmder) error) func(cmd Cmder) error)
|
||||
Subscribe(channels ...string) *PubSub
|
||||
PSubscribe(channels ...string) *PubSub
|
||||
Close() error
|
||||
}
|
||||
|
||||
var _ UniversalClient = (*Client)(nil)
|
||||
var _ UniversalClient = (*ClusterClient)(nil)
|
||||
|
||||
// NewUniversalClient returns a new multi client. The type of client returned depends
|
||||
// on the following three conditions:
|
||||
//
|
||||
// 1. if a MasterName is passed a sentinel-backed FailoverClient will be returned
|
||||
// 2. if the number of Addrs is two or more, a ClusterClient will be returned
|
||||
// 3. otherwise, a single-node redis Client will be returned.
|
||||
func NewUniversalClient(opts *UniversalOptions) UniversalClient {
|
||||
if opts.MasterName != "" {
|
||||
return NewFailoverClient(opts.failover())
|
||||
} else if len(opts.Addrs) > 1 {
|
||||
return NewClusterClient(opts.cluster())
|
||||
}
|
||||
return NewClient(opts.simple())
|
||||
}
|
||||
|
|
@ -143,6 +143,14 @@ github.com/go-macaron/session/postgres
|
|||
github.com/go-macaron/session/redis
|
||||
# github.com/go-macaron/toolbox v0.0.0-20180818072302-a77f45a7ce90
|
||||
github.com/go-macaron/toolbox
|
||||
# github.com/go-redis/redis v6.15.2+incompatible
|
||||
github.com/go-redis/redis
|
||||
github.com/go-redis/redis/internal
|
||||
github.com/go-redis/redis/internal/consistenthash
|
||||
github.com/go-redis/redis/internal/hashtag
|
||||
github.com/go-redis/redis/internal/pool
|
||||
github.com/go-redis/redis/internal/proto
|
||||
github.com/go-redis/redis/internal/util
|
||||
# github.com/go-sql-driver/mysql v1.4.0 => github.com/go-sql-driver/mysql v0.0.0-20181218123637-c45f530f8e7f
|
||||
github.com/go-sql-driver/mysql
|
||||
# github.com/go-xorm/builder v0.3.3
|
||||
|
|
|
|||
Loading…
Reference in New Issue