forked from gitea/gitea
613 lines
12 KiB
Go
613 lines
12 KiB
Go
// Copyright (c) 2014 Couchbase, 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 bleve
|
|
|
|
import (
|
|
"context"
|
|
"sync"
|
|
"time"
|
|
|
|
"github.com/blevesearch/bleve/v2/mapping"
|
|
"github.com/blevesearch/bleve/v2/search"
|
|
index "github.com/blevesearch/bleve_index_api"
|
|
)
|
|
|
|
type indexAliasImpl struct {
|
|
name string
|
|
indexes []Index
|
|
mutex sync.RWMutex
|
|
open bool
|
|
}
|
|
|
|
// NewIndexAlias creates a new IndexAlias over the provided
|
|
// Index objects.
|
|
func NewIndexAlias(indexes ...Index) *indexAliasImpl {
|
|
return &indexAliasImpl{
|
|
name: "alias",
|
|
indexes: indexes,
|
|
open: true,
|
|
}
|
|
}
|
|
|
|
// VisitIndexes invokes the visit callback on every
|
|
// indexes included in the index alias.
|
|
func (i *indexAliasImpl) VisitIndexes(visit func(Index)) {
|
|
i.mutex.RLock()
|
|
for _, idx := range i.indexes {
|
|
visit(idx)
|
|
}
|
|
i.mutex.RUnlock()
|
|
}
|
|
|
|
func (i *indexAliasImpl) isAliasToSingleIndex() error {
|
|
if len(i.indexes) < 1 {
|
|
return ErrorAliasEmpty
|
|
} else if len(i.indexes) > 1 {
|
|
return ErrorAliasMulti
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (i *indexAliasImpl) Index(id string, data interface{}) error {
|
|
i.mutex.RLock()
|
|
defer i.mutex.RUnlock()
|
|
|
|
if !i.open {
|
|
return ErrorIndexClosed
|
|
}
|
|
|
|
err := i.isAliasToSingleIndex()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
return i.indexes[0].Index(id, data)
|
|
}
|
|
|
|
func (i *indexAliasImpl) Delete(id string) error {
|
|
i.mutex.RLock()
|
|
defer i.mutex.RUnlock()
|
|
|
|
if !i.open {
|
|
return ErrorIndexClosed
|
|
}
|
|
|
|
err := i.isAliasToSingleIndex()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
return i.indexes[0].Delete(id)
|
|
}
|
|
|
|
func (i *indexAliasImpl) Batch(b *Batch) error {
|
|
i.mutex.RLock()
|
|
defer i.mutex.RUnlock()
|
|
|
|
if !i.open {
|
|
return ErrorIndexClosed
|
|
}
|
|
|
|
err := i.isAliasToSingleIndex()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
return i.indexes[0].Batch(b)
|
|
}
|
|
|
|
func (i *indexAliasImpl) Document(id string) (index.Document, error) {
|
|
i.mutex.RLock()
|
|
defer i.mutex.RUnlock()
|
|
|
|
if !i.open {
|
|
return nil, ErrorIndexClosed
|
|
}
|
|
|
|
err := i.isAliasToSingleIndex()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return i.indexes[0].Document(id)
|
|
}
|
|
|
|
func (i *indexAliasImpl) DocCount() (uint64, error) {
|
|
i.mutex.RLock()
|
|
defer i.mutex.RUnlock()
|
|
|
|
rv := uint64(0)
|
|
|
|
if !i.open {
|
|
return 0, ErrorIndexClosed
|
|
}
|
|
|
|
for _, index := range i.indexes {
|
|
otherCount, err := index.DocCount()
|
|
if err == nil {
|
|
rv += otherCount
|
|
}
|
|
// tolerate errors to produce partial counts
|
|
}
|
|
|
|
return rv, nil
|
|
}
|
|
|
|
func (i *indexAliasImpl) Search(req *SearchRequest) (*SearchResult, error) {
|
|
return i.SearchInContext(context.Background(), req)
|
|
}
|
|
|
|
func (i *indexAliasImpl) SearchInContext(ctx context.Context, req *SearchRequest) (*SearchResult, error) {
|
|
i.mutex.RLock()
|
|
defer i.mutex.RUnlock()
|
|
|
|
if !i.open {
|
|
return nil, ErrorIndexClosed
|
|
}
|
|
|
|
if len(i.indexes) < 1 {
|
|
return nil, ErrorAliasEmpty
|
|
}
|
|
|
|
// short circuit the simple case
|
|
if len(i.indexes) == 1 {
|
|
return i.indexes[0].SearchInContext(ctx, req)
|
|
}
|
|
|
|
return MultiSearch(ctx, req, i.indexes...)
|
|
}
|
|
|
|
func (i *indexAliasImpl) Fields() ([]string, error) {
|
|
i.mutex.RLock()
|
|
defer i.mutex.RUnlock()
|
|
|
|
if !i.open {
|
|
return nil, ErrorIndexClosed
|
|
}
|
|
|
|
err := i.isAliasToSingleIndex()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return i.indexes[0].Fields()
|
|
}
|
|
|
|
func (i *indexAliasImpl) FieldDict(field string) (index.FieldDict, error) {
|
|
i.mutex.RLock()
|
|
|
|
if !i.open {
|
|
i.mutex.RUnlock()
|
|
return nil, ErrorIndexClosed
|
|
}
|
|
|
|
err := i.isAliasToSingleIndex()
|
|
if err != nil {
|
|
i.mutex.RUnlock()
|
|
return nil, err
|
|
}
|
|
|
|
fieldDict, err := i.indexes[0].FieldDict(field)
|
|
if err != nil {
|
|
i.mutex.RUnlock()
|
|
return nil, err
|
|
}
|
|
|
|
return &indexAliasImplFieldDict{
|
|
index: i,
|
|
fieldDict: fieldDict,
|
|
}, nil
|
|
}
|
|
|
|
func (i *indexAliasImpl) FieldDictRange(field string, startTerm []byte, endTerm []byte) (index.FieldDict, error) {
|
|
i.mutex.RLock()
|
|
|
|
if !i.open {
|
|
i.mutex.RUnlock()
|
|
return nil, ErrorIndexClosed
|
|
}
|
|
|
|
err := i.isAliasToSingleIndex()
|
|
if err != nil {
|
|
i.mutex.RUnlock()
|
|
return nil, err
|
|
}
|
|
|
|
fieldDict, err := i.indexes[0].FieldDictRange(field, startTerm, endTerm)
|
|
if err != nil {
|
|
i.mutex.RUnlock()
|
|
return nil, err
|
|
}
|
|
|
|
return &indexAliasImplFieldDict{
|
|
index: i,
|
|
fieldDict: fieldDict,
|
|
}, nil
|
|
}
|
|
|
|
func (i *indexAliasImpl) FieldDictPrefix(field string, termPrefix []byte) (index.FieldDict, error) {
|
|
i.mutex.RLock()
|
|
|
|
if !i.open {
|
|
i.mutex.RUnlock()
|
|
return nil, ErrorIndexClosed
|
|
}
|
|
|
|
err := i.isAliasToSingleIndex()
|
|
if err != nil {
|
|
i.mutex.RUnlock()
|
|
return nil, err
|
|
}
|
|
|
|
fieldDict, err := i.indexes[0].FieldDictPrefix(field, termPrefix)
|
|
if err != nil {
|
|
i.mutex.RUnlock()
|
|
return nil, err
|
|
}
|
|
|
|
return &indexAliasImplFieldDict{
|
|
index: i,
|
|
fieldDict: fieldDict,
|
|
}, nil
|
|
}
|
|
|
|
func (i *indexAliasImpl) Close() error {
|
|
i.mutex.Lock()
|
|
defer i.mutex.Unlock()
|
|
|
|
i.open = false
|
|
return nil
|
|
}
|
|
|
|
func (i *indexAliasImpl) Mapping() mapping.IndexMapping {
|
|
i.mutex.RLock()
|
|
defer i.mutex.RUnlock()
|
|
|
|
if !i.open {
|
|
return nil
|
|
}
|
|
|
|
err := i.isAliasToSingleIndex()
|
|
if err != nil {
|
|
return nil
|
|
}
|
|
|
|
return i.indexes[0].Mapping()
|
|
}
|
|
|
|
func (i *indexAliasImpl) Stats() *IndexStat {
|
|
i.mutex.RLock()
|
|
defer i.mutex.RUnlock()
|
|
|
|
if !i.open {
|
|
return nil
|
|
}
|
|
|
|
err := i.isAliasToSingleIndex()
|
|
if err != nil {
|
|
return nil
|
|
}
|
|
|
|
return i.indexes[0].Stats()
|
|
}
|
|
|
|
func (i *indexAliasImpl) StatsMap() map[string]interface{} {
|
|
i.mutex.RLock()
|
|
defer i.mutex.RUnlock()
|
|
|
|
if !i.open {
|
|
return nil
|
|
}
|
|
|
|
err := i.isAliasToSingleIndex()
|
|
if err != nil {
|
|
return nil
|
|
}
|
|
|
|
return i.indexes[0].StatsMap()
|
|
}
|
|
|
|
func (i *indexAliasImpl) GetInternal(key []byte) ([]byte, error) {
|
|
i.mutex.RLock()
|
|
defer i.mutex.RUnlock()
|
|
|
|
if !i.open {
|
|
return nil, ErrorIndexClosed
|
|
}
|
|
|
|
err := i.isAliasToSingleIndex()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return i.indexes[0].GetInternal(key)
|
|
}
|
|
|
|
func (i *indexAliasImpl) SetInternal(key, val []byte) error {
|
|
i.mutex.RLock()
|
|
defer i.mutex.RUnlock()
|
|
|
|
if !i.open {
|
|
return ErrorIndexClosed
|
|
}
|
|
|
|
err := i.isAliasToSingleIndex()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
return i.indexes[0].SetInternal(key, val)
|
|
}
|
|
|
|
func (i *indexAliasImpl) DeleteInternal(key []byte) error {
|
|
i.mutex.RLock()
|
|
defer i.mutex.RUnlock()
|
|
|
|
if !i.open {
|
|
return ErrorIndexClosed
|
|
}
|
|
|
|
err := i.isAliasToSingleIndex()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
return i.indexes[0].DeleteInternal(key)
|
|
}
|
|
|
|
func (i *indexAliasImpl) Advanced() (index.Index, error) {
|
|
i.mutex.RLock()
|
|
defer i.mutex.RUnlock()
|
|
|
|
if !i.open {
|
|
return nil, ErrorIndexClosed
|
|
}
|
|
|
|
err := i.isAliasToSingleIndex()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return i.indexes[0].Advanced()
|
|
}
|
|
|
|
func (i *indexAliasImpl) Add(indexes ...Index) {
|
|
i.mutex.Lock()
|
|
defer i.mutex.Unlock()
|
|
|
|
i.indexes = append(i.indexes, indexes...)
|
|
}
|
|
|
|
func (i *indexAliasImpl) removeSingle(index Index) {
|
|
for pos, in := range i.indexes {
|
|
if in == index {
|
|
i.indexes = append(i.indexes[:pos], i.indexes[pos+1:]...)
|
|
break
|
|
}
|
|
}
|
|
}
|
|
|
|
func (i *indexAliasImpl) Remove(indexes ...Index) {
|
|
i.mutex.Lock()
|
|
defer i.mutex.Unlock()
|
|
|
|
for _, in := range indexes {
|
|
i.removeSingle(in)
|
|
}
|
|
}
|
|
|
|
func (i *indexAliasImpl) Swap(in, out []Index) {
|
|
i.mutex.Lock()
|
|
defer i.mutex.Unlock()
|
|
|
|
// add
|
|
i.indexes = append(i.indexes, in...)
|
|
|
|
// delete
|
|
for _, ind := range out {
|
|
i.removeSingle(ind)
|
|
}
|
|
}
|
|
|
|
// createChildSearchRequest creates a separate
|
|
// request from the original
|
|
// For now, avoid data race on req structure.
|
|
// TODO disable highlight/field load on child
|
|
// requests, and add code to do this only on
|
|
// the actual final results.
|
|
// Perhaps that part needs to be optional,
|
|
// could be slower in remote usages.
|
|
func createChildSearchRequest(req *SearchRequest) *SearchRequest {
|
|
rv := SearchRequest{
|
|
Query: req.Query,
|
|
Size: req.Size + req.From,
|
|
From: 0,
|
|
Highlight: req.Highlight,
|
|
Fields: req.Fields,
|
|
Facets: req.Facets,
|
|
Explain: req.Explain,
|
|
Sort: req.Sort.Copy(),
|
|
IncludeLocations: req.IncludeLocations,
|
|
Score: req.Score,
|
|
SearchAfter: req.SearchAfter,
|
|
SearchBefore: req.SearchBefore,
|
|
}
|
|
return &rv
|
|
}
|
|
|
|
type asyncSearchResult struct {
|
|
Name string
|
|
Result *SearchResult
|
|
Err error
|
|
}
|
|
|
|
// MultiSearch executes a SearchRequest across multiple Index objects,
|
|
// then merges the results. The indexes must honor any ctx deadline.
|
|
func MultiSearch(ctx context.Context, req *SearchRequest, indexes ...Index) (*SearchResult, error) {
|
|
|
|
searchStart := time.Now()
|
|
asyncResults := make(chan *asyncSearchResult, len(indexes))
|
|
|
|
var reverseQueryExecution bool
|
|
if req.SearchBefore != nil {
|
|
reverseQueryExecution = true
|
|
req.Sort.Reverse()
|
|
req.SearchAfter = req.SearchBefore
|
|
req.SearchBefore = nil
|
|
}
|
|
|
|
// run search on each index in separate go routine
|
|
var waitGroup sync.WaitGroup
|
|
|
|
var searchChildIndex = func(in Index, childReq *SearchRequest) {
|
|
rv := asyncSearchResult{Name: in.Name()}
|
|
rv.Result, rv.Err = in.SearchInContext(ctx, childReq)
|
|
asyncResults <- &rv
|
|
waitGroup.Done()
|
|
}
|
|
|
|
waitGroup.Add(len(indexes))
|
|
for _, in := range indexes {
|
|
go searchChildIndex(in, createChildSearchRequest(req))
|
|
}
|
|
|
|
// on another go routine, close after finished
|
|
go func() {
|
|
waitGroup.Wait()
|
|
close(asyncResults)
|
|
}()
|
|
|
|
var sr *SearchResult
|
|
indexErrors := make(map[string]error)
|
|
|
|
for asr := range asyncResults {
|
|
if asr.Err == nil {
|
|
if sr == nil {
|
|
// first result
|
|
sr = asr.Result
|
|
} else {
|
|
// merge with previous
|
|
sr.Merge(asr.Result)
|
|
}
|
|
} else {
|
|
indexErrors[asr.Name] = asr.Err
|
|
}
|
|
}
|
|
|
|
// merge just concatenated all the hits
|
|
// now lets clean it up
|
|
|
|
// handle case where no results were successful
|
|
if sr == nil {
|
|
sr = &SearchResult{
|
|
Status: &SearchStatus{
|
|
Errors: make(map[string]error),
|
|
},
|
|
}
|
|
}
|
|
|
|
sortFunc := req.SortFunc()
|
|
// sort all hits with the requested order
|
|
if len(req.Sort) > 0 {
|
|
sorter := newSearchHitSorter(req.Sort, sr.Hits)
|
|
sortFunc(sorter)
|
|
}
|
|
|
|
// now skip over the correct From
|
|
if req.From > 0 && len(sr.Hits) > req.From {
|
|
sr.Hits = sr.Hits[req.From:]
|
|
} else if req.From > 0 {
|
|
sr.Hits = search.DocumentMatchCollection{}
|
|
}
|
|
|
|
// now trim to the correct size
|
|
if req.Size > 0 && len(sr.Hits) > req.Size {
|
|
sr.Hits = sr.Hits[0:req.Size]
|
|
}
|
|
|
|
// fix up facets
|
|
for name, fr := range req.Facets {
|
|
sr.Facets.Fixup(name, fr.Size)
|
|
}
|
|
|
|
if reverseQueryExecution {
|
|
// reverse the sort back to the original
|
|
req.Sort.Reverse()
|
|
// resort using the original order
|
|
mhs := newSearchHitSorter(req.Sort, sr.Hits)
|
|
sortFunc(mhs)
|
|
// reset request
|
|
req.SearchBefore = req.SearchAfter
|
|
req.SearchAfter = nil
|
|
}
|
|
|
|
// fix up original request
|
|
sr.Request = req
|
|
searchDuration := time.Since(searchStart)
|
|
sr.Took = searchDuration
|
|
|
|
// fix up errors
|
|
if len(indexErrors) > 0 {
|
|
if sr.Status.Errors == nil {
|
|
sr.Status.Errors = make(map[string]error)
|
|
}
|
|
for indexName, indexErr := range indexErrors {
|
|
sr.Status.Errors[indexName] = indexErr
|
|
sr.Status.Total++
|
|
sr.Status.Failed++
|
|
}
|
|
}
|
|
|
|
return sr, nil
|
|
}
|
|
|
|
func (i *indexAliasImpl) NewBatch() *Batch {
|
|
i.mutex.RLock()
|
|
defer i.mutex.RUnlock()
|
|
|
|
if !i.open {
|
|
return nil
|
|
}
|
|
|
|
err := i.isAliasToSingleIndex()
|
|
if err != nil {
|
|
return nil
|
|
}
|
|
|
|
return i.indexes[0].NewBatch()
|
|
}
|
|
|
|
func (i *indexAliasImpl) Name() string {
|
|
return i.name
|
|
}
|
|
|
|
func (i *indexAliasImpl) SetName(name string) {
|
|
i.name = name
|
|
}
|
|
|
|
type indexAliasImplFieldDict struct {
|
|
index *indexAliasImpl
|
|
fieldDict index.FieldDict
|
|
}
|
|
|
|
func (f *indexAliasImplFieldDict) Next() (*index.DictEntry, error) {
|
|
return f.fieldDict.Next()
|
|
}
|
|
|
|
func (f *indexAliasImplFieldDict) Close() error {
|
|
defer f.index.mutex.RUnlock()
|
|
return f.fieldDict.Close()
|
|
}
|