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Fix generate index failure possibility on postgres (#21998)

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@wxiaoguang Please review

Co-authored-by: silverwind <me@silverwind.io>
This commit is contained in:
Lunny Xiao 2022-12-02 11:15:36 +08:00 committed by GitHub
parent 64973cf18f
commit f7ade6de7c
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GPG Key ID: 4AEE18F83AFDEB23
3 changed files with 40 additions and 2 deletions
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20
models/db/index.go
View File

@ -7,6 +7,9 @@ import (
"context"
"errors"
"fmt"
"strconv"
"code.gitea.io/gitea/modules/setting"
)
// ResourceIndex represents a resource index which could be used as issue/release and others
@ -55,8 +58,25 @@ func SyncMaxResourceIndex(ctx context.Context, tableName string, groupID, maxInd
return nil
}
func postgresGetNextResourceIndex(ctx context.Context, tableName string, groupID int64) (int64, error) {
res, err := GetEngine(ctx).Query(fmt.Sprintf("INSERT INTO %s (group_id, max_index) "+
"VALUES (?,1) ON CONFLICT (group_id) DO UPDATE SET max_index = %s.max_index+1 RETURNING max_index",
tableName, tableName), groupID)
if err != nil {
return 0, err
}
if len(res) == 0 {
return 0, ErrGetResourceIndexFailed
}
return strconv.ParseInt(string(res[0]["max_index"]), 10, 64)
}
// GetNextResourceIndex generates a resource index, it must run in the same transaction where the resource is created
func GetNextResourceIndex(ctx context.Context, tableName string, groupID int64) (int64, error) {
if setting.Database.UsePostgreSQL {
return postgresGetNextResourceIndex(ctx, tableName, groupID)
}
e := GetEngine(ctx)
// try to update the max_index to next value, and acquire the write-lock for the record

18
models/git/commit_status.go
View File

@ -9,6 +9,7 @@ import (
"errors"
"fmt"
"net/url"
"strconv"
"strings"
"time"
@ -49,8 +50,25 @@ func init() {
db.RegisterModel(new(CommitStatusIndex))
}
func postgresGetCommitStatusIndex(ctx context.Context, repoID int64, sha string) (int64, error) {
res, err := db.GetEngine(ctx).Query("INSERT INTO `commit_status_index` (repo_id, sha, max_index) "+
"VALUES (?,?,1) ON CONFLICT (repo_id, sha) DO UPDATE SET max_index = `commit_status_index`.max_index+1 RETURNING max_index",
repoID, sha)
if err != nil {
return 0, err
}
if len(res) == 0 {
return 0, db.ErrGetResourceIndexFailed
}
return strconv.ParseInt(string(res[0]["max_index"]), 10, 64)
}
// GetNextCommitStatusIndex retried 3 times to generate a resource index
func GetNextCommitStatusIndex(ctx context.Context, repoID int64, sha string) (int64, error) {
if setting.Database.UsePostgreSQL {
return postgresGetCommitStatusIndex(ctx, repoID, sha)
}
e := db.GetEngine(ctx)
// try to update the max_index to next value, and acquire the write-lock for the record

4
tests/integration/repo_commits_test.go
View File

@ -135,8 +135,8 @@ func TestRepoCommitsStatusParallel(t *testing.T) {
var wg sync.WaitGroup
for i := 0; i < 10; i++ {
wg.Add(1)
go func(t *testing.T, i int) {
t.Run(fmt.Sprintf("ParallelCreateStatus_%d", i), func(t *testing.T) {
go func(parentT *testing.T, i int) {
parentT.Run(fmt.Sprintf("ParallelCreateStatus_%d", i), func(t *testing.T) {
runBody := doAPICreateCommitStatus(NewAPITestContext(t, "user2", "repo1"), path.Base(commitURL), api.CommitStatusState("pending"))
runBody(t)
wg.Done()