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indexer.go
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indexer.go
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// Copyright 2018 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 issues
import (
"context"
"fmt"
"os"
"sync"
"time"
"code.gitea.io/gitea/models"
"code.gitea.io/gitea/models/db"
repo_model "code.gitea.io/gitea/models/repo"
"code.gitea.io/gitea/modules/graceful"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/queue"
"code.gitea.io/gitea/modules/setting"
"code.gitea.io/gitea/modules/util"
)
// IndexerData data stored in the issue indexer
type IndexerData struct {
ID int64 `json:"id"`
RepoID int64 `json:"repo_id"`
Title string `json:"title"`
Content string `json:"content"`
Comments []string `json:"comments"`
IsDelete bool `json:"is_delete"`
IDs []int64 `json:"ids"`
}
// Match represents on search result
type Match struct {
ID int64 `json:"id"`
Score float64 `json:"score"`
}
// SearchResult represents search results
type SearchResult struct {
Total int64
Hits []Match
}
// Indexer defines an interface to indexer issues contents
type Indexer interface {
Init() (bool, error)
Index(issue []*IndexerData) error
Delete(ids ...int64) error
Search(kw string, repoIDs []int64, limit, start int) (*SearchResult, error)
Close()
}
type indexerHolder struct {
indexer Indexer
mutex sync.RWMutex
cond *sync.Cond
cancelled bool
}
func newIndexerHolder() *indexerHolder {
h := &indexerHolder{}
h.cond = sync.NewCond(h.mutex.RLocker())
return h
}
func (h *indexerHolder) cancel() {
h.mutex.Lock()
defer h.mutex.Unlock()
h.cancelled = true
h.cond.Broadcast()
}
func (h *indexerHolder) set(indexer Indexer) {
h.mutex.Lock()
defer h.mutex.Unlock()
h.indexer = indexer
h.cond.Broadcast()
}
func (h *indexerHolder) get() Indexer {
h.mutex.RLock()
defer h.mutex.RUnlock()
if h.indexer == nil && !h.cancelled {
h.cond.Wait()
}
return h.indexer
}
var (
// issueIndexerQueue queue of issue ids to be updated
issueIndexerQueue queue.Queue
holder = newIndexerHolder()
)
// InitIssueIndexer initialize issue indexer, syncReindex is true then reindex until
// all issue index done.
func InitIssueIndexer(syncReindex bool) {
waitChannel := make(chan time.Duration)
// Create the Queue
switch setting.Indexer.IssueType {
case "bleve", "elasticsearch":
handler := func(data ...queue.Data) {
indexer := holder.get()
if indexer == nil {
log.Error("Issue indexer handler: unable to get indexer!")
return
}
iData := make([]*IndexerData, 0, setting.Indexer.IssueQueueBatchNumber)
for _, datum := range data {
indexerData, ok := datum.(*IndexerData)
if !ok {
log.Error("Unable to process provided datum: %v - not possible to cast to IndexerData", datum)
continue
}
log.Trace("IndexerData Process: %d %v %t", indexerData.ID, indexerData.IDs, indexerData.IsDelete)
if indexerData.IsDelete {
_ = indexer.Delete(indexerData.IDs...)
continue
}
iData = append(iData, indexerData)
}
if err := indexer.Index(iData); err != nil {
log.Error("Error whilst indexing: %v Error: %v", iData, err)
}
}
issueIndexerQueue = queue.CreateQueue("issue_indexer", handler, &IndexerData{})
if issueIndexerQueue == nil {
log.Fatal("Unable to create issue indexer queue")
}
default:
issueIndexerQueue = &queue.DummyQueue{}
}
// Create the Indexer
go func() {
start := time.Now()
log.Info("PID %d: Initializing Issue Indexer: %s", os.Getpid(), setting.Indexer.IssueType)
var populate bool
switch setting.Indexer.IssueType {
case "bleve":
defer func() {
if err := recover(); err != nil {
log.Error("PANIC whilst initializing issue indexer: %v\nStacktrace: %s", err, log.Stack(2))
log.Error("The indexer files are likely corrupted and may need to be deleted")
log.Error("You can completely remove the %q directory to make Gitea recreate the indexes", setting.Indexer.IssuePath)
holder.cancel()
log.Fatal("PID: %d Unable to initialize the Bleve Issue Indexer at path: %s Error: %v", os.Getpid(), setting.Indexer.IssuePath, err)
}
}()
issueIndexer := NewBleveIndexer(setting.Indexer.IssuePath)
exist, err := issueIndexer.Init()
if err != nil {
holder.cancel()
log.Fatal("Unable to initialize Bleve Issue Indexer at path: %s Error: %v", setting.Indexer.IssuePath, err)
}
populate = !exist
holder.set(issueIndexer)
graceful.GetManager().RunAtTerminate(func() {
log.Debug("Closing issue indexer")
issueIndexer := holder.get()
if issueIndexer != nil {
issueIndexer.Close()
}
log.Info("PID: %d Issue Indexer closed", os.Getpid())
})
log.Debug("Created Bleve Indexer")
case "elasticsearch":
graceful.GetManager().RunWithShutdownFns(func(_, atTerminate func(func())) {
issueIndexer, err := NewElasticSearchIndexer(setting.Indexer.IssueConnStr, setting.Indexer.IssueIndexerName)
if err != nil {
log.Fatal("Unable to initialize Elastic Search Issue Indexer at connection: %s Error: %v", setting.Indexer.IssueConnStr, err)
}
exist, err := issueIndexer.Init()
if err != nil {
log.Fatal("Unable to issueIndexer.Init with connection %s Error: %v", setting.Indexer.IssueConnStr, err)
}
populate = !exist
holder.set(issueIndexer)
})
case "db":
issueIndexer := &DBIndexer{}
holder.set(issueIndexer)
default:
holder.cancel()
log.Fatal("Unknown issue indexer type: %s", setting.Indexer.IssueType)
}
// Start processing the queue
go graceful.GetManager().RunWithShutdownFns(issueIndexerQueue.Run)
// Populate the index
if populate {
if syncReindex {
graceful.GetManager().RunWithShutdownContext(populateIssueIndexer)
} else {
go graceful.GetManager().RunWithShutdownContext(populateIssueIndexer)
}
}
waitChannel <- time.Since(start)
close(waitChannel)
}()
if syncReindex {
select {
case <-waitChannel:
case <-graceful.GetManager().IsShutdown():
}
} else if setting.Indexer.StartupTimeout > 0 {
go func() {
timeout := setting.Indexer.StartupTimeout
if graceful.GetManager().IsChild() && setting.GracefulHammerTime > 0 {
timeout += setting.GracefulHammerTime
}
select {
case duration := <-waitChannel:
log.Info("Issue Indexer Initialization took %v", duration)
case <-graceful.GetManager().IsShutdown():
log.Warn("Shutdown occurred before issue index initialisation was complete")
case <-time.After(timeout):
if shutdownable, ok := issueIndexerQueue.(queue.Shutdownable); ok {
shutdownable.Terminate()
}
log.Fatal("Issue Indexer Initialization timed-out after: %v", timeout)
}
}()
}
}
// populateIssueIndexer populate the issue indexer with issue data
func populateIssueIndexer(ctx context.Context) {
for page := 1; ; page++ {
select {
case <-ctx.Done():
log.Warn("Issue Indexer population shutdown before completion")
return
default:
}
repos, _, err := models.SearchRepositoryByName(&models.SearchRepoOptions{
ListOptions: db.ListOptions{Page: page, PageSize: models.RepositoryListDefaultPageSize},
OrderBy: db.SearchOrderByID,
Private: true,
Collaborate: util.OptionalBoolFalse,
})
if err != nil {
log.Error("SearchRepositoryByName: %v", err)
continue
}
if len(repos) == 0 {
log.Debug("Issue Indexer population complete")
return
}
for _, repo := range repos {
select {
case <-ctx.Done():
log.Info("Issue Indexer population shutdown before completion")
return
default:
}
UpdateRepoIndexer(repo)
}
}
}
// UpdateRepoIndexer add/update all issues of the repositories
func UpdateRepoIndexer(repo *repo_model.Repository) {
is, err := models.Issues(&models.IssuesOptions{
RepoIDs: []int64{repo.ID},
IsClosed: util.OptionalBoolNone,
IsPull: util.OptionalBoolNone,
})
if err != nil {
log.Error("Issues: %v", err)
return
}
if err = models.IssueList(is).LoadDiscussComments(); err != nil {
log.Error("LoadComments: %v", err)
return
}
for _, issue := range is {
UpdateIssueIndexer(issue)
}
}
// UpdateIssueIndexer add/update an issue to the issue indexer
func UpdateIssueIndexer(issue *models.Issue) {
var comments []string
for _, comment := range issue.Comments {
if comment.Type == models.CommentTypeComment {
comments = append(comments, comment.Content)
}
}
indexerData := &IndexerData{
ID: issue.ID,
RepoID: issue.RepoID,
Title: issue.Title,
Content: issue.Content,
Comments: comments,
}
log.Debug("Adding to channel: %v", indexerData)
if err := issueIndexerQueue.Push(indexerData); err != nil {
log.Error("Unable to push to issue indexer: %v: Error: %v", indexerData, err)
}
}
// DeleteRepoIssueIndexer deletes repo's all issues indexes
func DeleteRepoIssueIndexer(repo *repo_model.Repository) {
var ids []int64
ids, err := models.GetIssueIDsByRepoID(repo.ID)
if err != nil {
log.Error("getIssueIDsByRepoID failed: %v", err)
return
}
if len(ids) == 0 {
return
}
indexerData := &IndexerData{
IDs: ids,
IsDelete: true,
}
if err := issueIndexerQueue.Push(indexerData); err != nil {
log.Error("Unable to push to issue indexer: %v: Error: %v", indexerData, err)
}
}
// SearchIssuesByKeyword search issue ids by keywords and repo id
// WARNNING: You have to ensure user have permission to visit repoIDs' issues
func SearchIssuesByKeyword(repoIDs []int64, keyword string) ([]int64, error) {
var issueIDs []int64
indexer := holder.get()
if indexer == nil {
log.Error("SearchIssuesByKeyword(): unable to get indexer!")
return nil, fmt.Errorf("unable to get issue indexer")
}
res, err := indexer.Search(keyword, repoIDs, 50, 0)
if err != nil {
return nil, err
}
for _, r := range res.Hits {
issueIDs = append(issueIDs, r.ID)
}
return issueIDs, nil
}