gitea/modules/indexer/code/repo.go
zeripath e3c3b33ea7
Graceful: Xorm, RepoIndexer, Cron and Others (#9282)
* Change graceful to use a singleton obtained through GetManager instead of a global.
* Graceful: Make TestPullRequests shutdownable
* Graceful: Make the cron tasks graceful
* Graceful: AddTestPullRequest run in graceful ctx
* Graceful: SyncMirrors shutdown
* Graceful: SetDefaultContext for Xorm to be HammerContext
* Avoid starting graceful for migrate commands and checkout
* Graceful: DeliverHooks now can be shutdown
* Fix multiple syncing errors in modules/sync/UniqueQueue &  Make UniqueQueue closable
* Begin the process of making the repo indexer shutdown gracefully
2019-12-15 09:51:28 +00:00

291 lines
8.0 KiB
Go

// Copyright 2017 The Gitea Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package code
import (
"context"
"os"
"strings"
"sync"
"code.gitea.io/gitea/models"
"code.gitea.io/gitea/modules/graceful"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/setting"
"github.com/blevesearch/bleve"
"github.com/blevesearch/bleve/analysis/analyzer/custom"
"github.com/blevesearch/bleve/analysis/token/lowercase"
"github.com/blevesearch/bleve/analysis/tokenizer/unicode"
"github.com/blevesearch/bleve/search/query"
"github.com/ethantkoenig/rupture"
)
const (
repoIndexerAnalyzer = "repoIndexerAnalyzer"
repoIndexerDocType = "repoIndexerDocType"
repoIndexerLatestVersion = 4
)
type bleveIndexerHolder struct {
index bleve.Index
mutex sync.RWMutex
cond *sync.Cond
}
func newBleveIndexerHolder() *bleveIndexerHolder {
b := &bleveIndexerHolder{}
b.cond = sync.NewCond(b.mutex.RLocker())
return b
}
func (r *bleveIndexerHolder) set(index bleve.Index) {
r.mutex.Lock()
defer r.mutex.Unlock()
r.index = index
r.cond.Broadcast()
}
func (r *bleveIndexerHolder) get() bleve.Index {
r.mutex.RLock()
defer r.mutex.RUnlock()
if r.index == nil {
r.cond.Wait()
}
return r.index
}
// repoIndexer (thread-safe) index for repository contents
var indexerHolder = newBleveIndexerHolder()
// RepoIndexerOp type of operation to perform on repo indexer
type RepoIndexerOp int
const (
// RepoIndexerOpUpdate add/update a file's contents
RepoIndexerOpUpdate = iota
// RepoIndexerOpDelete delete a file
RepoIndexerOpDelete
)
// RepoIndexerData data stored in the repo indexer
type RepoIndexerData struct {
RepoID int64
Content string
}
// Type returns the document type, for bleve's mapping.Classifier interface.
func (d *RepoIndexerData) Type() string {
return repoIndexerDocType
}
// RepoIndexerUpdate an update to the repo indexer
type RepoIndexerUpdate struct {
Filepath string
Op RepoIndexerOp
Data *RepoIndexerData
}
// AddToFlushingBatch adds the update to the given flushing batch.
func (update RepoIndexerUpdate) AddToFlushingBatch(batch rupture.FlushingBatch) error {
id := filenameIndexerID(update.Data.RepoID, update.Filepath)
switch update.Op {
case RepoIndexerOpUpdate:
return batch.Index(id, update.Data)
case RepoIndexerOpDelete:
return batch.Delete(id)
default:
log.Error("Unrecognized repo indexer op: %d", update.Op)
}
return nil
}
// initRepoIndexer initialize repo indexer
func initRepoIndexer(populateIndexer func() error) {
indexer, err := openIndexer(setting.Indexer.RepoPath, repoIndexerLatestVersion)
if err != nil {
log.Fatal("InitRepoIndexer %s: %v", setting.Indexer.RepoPath, err)
}
if indexer != nil {
indexerHolder.set(indexer)
closeAtTerminate()
// Continue population from where left off
if err = populateIndexer(); err != nil {
log.Fatal("PopulateRepoIndex: %v", err)
}
return
}
if err = createRepoIndexer(setting.Indexer.RepoPath, repoIndexerLatestVersion); err != nil {
log.Fatal("CreateRepoIndexer: %v", err)
}
closeAtTerminate()
// if there is any existing repo indexer metadata in the DB, delete it
// since we are starting afresh. Also, xorm requires deletes to have a
// condition, and we want to delete everything, thus 1=1.
if err := models.DeleteAllRecords("repo_indexer_status"); err != nil {
log.Fatal("DeleteAllRepoIndexerStatus: %v", err)
}
if err = populateIndexer(); err != nil {
log.Fatal("PopulateRepoIndex: %v", err)
}
}
func closeAtTerminate() {
graceful.GetManager().RunAtTerminate(context.Background(), func() {
log.Debug("Closing repo indexer")
indexer := indexerHolder.get()
if indexer != nil {
err := indexer.Close()
if err != nil {
log.Error("Error whilst closing the repository indexer: %v", err)
}
}
log.Info("PID: %d Repository Indexer closed", os.Getpid())
})
}
// createRepoIndexer create a repo indexer if one does not already exist
func createRepoIndexer(path string, latestVersion int) error {
docMapping := bleve.NewDocumentMapping()
numericFieldMapping := bleve.NewNumericFieldMapping()
numericFieldMapping.IncludeInAll = false
docMapping.AddFieldMappingsAt("RepoID", numericFieldMapping)
textFieldMapping := bleve.NewTextFieldMapping()
textFieldMapping.IncludeInAll = false
docMapping.AddFieldMappingsAt("Content", textFieldMapping)
mapping := bleve.NewIndexMapping()
if err := addUnicodeNormalizeTokenFilter(mapping); err != nil {
return err
} else if err := mapping.AddCustomAnalyzer(repoIndexerAnalyzer, map[string]interface{}{
"type": custom.Name,
"char_filters": []string{},
"tokenizer": unicode.Name,
"token_filters": []string{unicodeNormalizeName, lowercase.Name},
}); err != nil {
return err
}
mapping.DefaultAnalyzer = repoIndexerAnalyzer
mapping.AddDocumentMapping(repoIndexerDocType, docMapping)
mapping.AddDocumentMapping("_all", bleve.NewDocumentDisabledMapping())
indexer, err := bleve.New(path, mapping)
if err != nil {
return err
}
indexerHolder.set(indexer)
return rupture.WriteIndexMetadata(path, &rupture.IndexMetadata{
Version: latestVersion,
})
}
func filenameIndexerID(repoID int64, filename string) string {
return indexerID(repoID) + "_" + filename
}
func filenameOfIndexerID(indexerID string) string {
index := strings.IndexByte(indexerID, '_')
if index == -1 {
log.Error("Unexpected ID in repo indexer: %s", indexerID)
}
return indexerID[index+1:]
}
// RepoIndexerBatch batch to add updates to
func RepoIndexerBatch() rupture.FlushingBatch {
return rupture.NewFlushingBatch(indexerHolder.get(), maxBatchSize)
}
// deleteRepoFromIndexer delete all of a repo's files from indexer
func deleteRepoFromIndexer(repoID int64) error {
query := numericEqualityQuery(repoID, "RepoID")
searchRequest := bleve.NewSearchRequestOptions(query, 2147483647, 0, false)
result, err := indexerHolder.get().Search(searchRequest)
if err != nil {
return err
}
batch := RepoIndexerBatch()
for _, hit := range result.Hits {
if err = batch.Delete(hit.ID); err != nil {
return err
}
}
return batch.Flush()
}
// RepoSearchResult result of performing a search in a repo
type RepoSearchResult struct {
RepoID int64
StartIndex int
EndIndex int
Filename string
Content string
}
// SearchRepoByKeyword searches for files in the specified repo.
// Returns the matching file-paths
func SearchRepoByKeyword(repoIDs []int64, keyword string, page, pageSize int) (int64, []*RepoSearchResult, error) {
phraseQuery := bleve.NewMatchPhraseQuery(keyword)
phraseQuery.FieldVal = "Content"
phraseQuery.Analyzer = repoIndexerAnalyzer
var indexerQuery query.Query
if len(repoIDs) > 0 {
var repoQueries = make([]query.Query, 0, len(repoIDs))
for _, repoID := range repoIDs {
repoQueries = append(repoQueries, numericEqualityQuery(repoID, "RepoID"))
}
indexerQuery = bleve.NewConjunctionQuery(
bleve.NewDisjunctionQuery(repoQueries...),
phraseQuery,
)
} else {
indexerQuery = phraseQuery
}
from := (page - 1) * pageSize
searchRequest := bleve.NewSearchRequestOptions(indexerQuery, pageSize, from, false)
searchRequest.Fields = []string{"Content", "RepoID"}
searchRequest.IncludeLocations = true
result, err := indexerHolder.get().Search(searchRequest)
if err != nil {
return 0, nil, err
}
searchResults := make([]*RepoSearchResult, len(result.Hits))
for i, hit := range result.Hits {
var startIndex, endIndex int = -1, -1
for _, locations := range hit.Locations["Content"] {
location := locations[0]
locationStart := int(location.Start)
locationEnd := int(location.End)
if startIndex < 0 || locationStart < startIndex {
startIndex = locationStart
}
if endIndex < 0 || locationEnd > endIndex {
endIndex = locationEnd
}
}
searchResults[i] = &RepoSearchResult{
RepoID: int64(hit.Fields["RepoID"].(float64)),
StartIndex: startIndex,
EndIndex: endIndex,
Filename: filenameOfIndexerID(hit.ID),
Content: hit.Fields["Content"].(string),
}
}
return int64(result.Total), searchResults, nil
}