Improve queue and logger context (#24924)

Before there was a "graceful function": RunWithShutdownFns, it's mainly
for some modules which doesn't support context.

The old queue system doesn't work well with context, so the old queues
need it.

After the queue refactoring, the new queue works with context well, so,
use Golang context as much as possible, the `RunWithShutdownFns` could
be removed (replaced by RunWithCancel for context cancel mechanism), the
related code could be simplified.

This PR also fixes some legacy queue-init problems, eg:

* typo : archiver: "unable to create codes indexer queue" => "unable to
create repo-archive queue"
* no nil check for failed queues, which causes unfriendly panic

After this PR, many goroutines could have better display name:

![image](https://github.com/go-gitea/gitea/assets/2114189/701b2a9b-8065-4137-aeaa-0bda2b34604a)

![image](https://github.com/go-gitea/gitea/assets/2114189/f1d5f50f-0534-40f0-b0be-f2c9daa5fe92)

1 files changed, 32 insertions, 39 deletions

diff --git a/modules/indexer/issues/indexer.go b/modules/indexer/issues/indexer.go
index 76ff80ffca..f36ea10935 100644
--- a/modules/indexer/issues/indexer.go
+++ b/modules/indexer/issues/indexer.go
@@ -102,7 +102,7 @@ var (
 func InitIssueIndexer(syncReindex bool) {
 	ctx, _, finished := process.GetManager().AddTypedContext(context.Background(), "Service: IssueIndexer", process.SystemProcessType, false)
 
-	waitChannel := make(chan time.Duration, 1)
+	indexerInitWaitChannel := make(chan time.Duration, 1)
 
 	// Create the Queue
 	switch setting.Indexer.IssueType {
@@ -110,7 +110,7 @@ func InitIssueIndexer(syncReindex bool) {
 		handler := func(items ...*IndexerData) (unhandled []*IndexerData) {
 			indexer := holder.get()
 			if indexer == nil {
-				log.Error("Issue indexer handler: unable to get indexer.")
+				log.Warn("Issue indexer handler: indexer is not ready, retry later.")
 				return items
 			}
 			toIndex := make([]*IndexerData, 0, len(items))
@@ -138,15 +138,17 @@ func InitIssueIndexer(syncReindex bool) {
 			return unhandled
 		}
 
-		issueIndexerQueue = queue.CreateSimpleQueue("issue_indexer", handler)
+		issueIndexerQueue = queue.CreateSimpleQueue(ctx, "issue_indexer", handler)
 
 		if issueIndexerQueue == nil {
 			log.Fatal("Unable to create issue indexer queue")
 		}
 	default:
-		issueIndexerQueue = queue.CreateSimpleQueue[*IndexerData]("issue_indexer", nil)
+		issueIndexerQueue = queue.CreateSimpleQueue[*IndexerData](ctx, "issue_indexer", nil)
 	}
 
+	graceful.GetManager().RunAtTerminate(finished)
+
 	// Create the Indexer
 	go func() {
 		pprof.SetGoroutineLabels(ctx)
@@ -178,51 +180,41 @@ func InitIssueIndexer(syncReindex bool) {
 				if issueIndexer != nil {
 					issueIndexer.Close()
 				}
-				finished()
 				log.Info("PID: %d Issue Indexer closed", os.Getpid())
 			})
 			log.Debug("Created Bleve Indexer")
 		case "elasticsearch":
-			graceful.GetManager().RunWithShutdownFns(func(_, atTerminate func(func())) {
-				pprof.SetGoroutineLabels(ctx)
-				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)
-				atTerminate(finished)
-			})
+			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)
-			graceful.GetManager().RunAtTerminate(finished)
 		case "meilisearch":
-			graceful.GetManager().RunWithShutdownFns(func(_, atTerminate func(func())) {
-				pprof.SetGoroutineLabels(ctx)
-				issueIndexer, err := NewMeilisearchIndexer(setting.Indexer.IssueConnStr, setting.Indexer.IssueConnAuth, setting.Indexer.IssueIndexerName)
-				if err != nil {
-					log.Fatal("Unable to initialize Meilisearch 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)
-				atTerminate(finished)
-			})
+			issueIndexer, err := NewMeilisearchIndexer(setting.Indexer.IssueConnStr, setting.Indexer.IssueConnAuth, setting.Indexer.IssueIndexerName)
+			if err != nil {
+				log.Fatal("Unable to initialize Meilisearch 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)
 		default:
 			holder.cancel()
 			log.Fatal("Unknown issue indexer type: %s", setting.Indexer.IssueType)
 		}
 
 		// Start processing the queue
-		go graceful.GetManager().RunWithShutdownFns(issueIndexerQueue.Run)
+		go graceful.GetManager().RunWithCancel(issueIndexerQueue)
 
 		// Populate the index
 		if populate {
@@ -232,13 +224,14 @@ func InitIssueIndexer(syncReindex bool) {
 				go graceful.GetManager().RunWithShutdownContext(populateIssueIndexer)
 			}
 		}
-		waitChannel <- time.Since(start)
-		close(waitChannel)
+
+		indexerInitWaitChannel <- time.Since(start)
+		close(indexerInitWaitChannel)
 	}()
 
 	if syncReindex {
 		select {
-		case <-waitChannel:
+		case <-indexerInitWaitChannel:
 		case <-graceful.GetManager().IsShutdown():
 		}
 	} else if setting.Indexer.StartupTimeout > 0 {
@@ -249,7 +242,7 @@ func InitIssueIndexer(syncReindex bool) {
 				timeout += setting.GracefulHammerTime
 			}
 			select {
-			case duration := <-waitChannel:
+			case duration := <-indexerInitWaitChannel:
 				log.Info("Issue Indexer Initialization took %v", duration)
 			case <-graceful.GetManager().IsShutdown():
 				log.Warn("Shutdown occurred before issue index initialisation was complete")