Remove transaction for archive download (#32186) (#32520)

Backport #32186 by @lunny

Since there is a status column in the database, the transaction is
unnecessary when downloading an archive. The transaction is blocking
database operations, especially with SQLite.

Replace #27563

Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>

services/repository/archiver/archiver.go

@@ -68,7 +68,7 @@ func (e RepoRefNotFoundError) Is(err error) bool {
 }
 
 // NewRequest creates an archival request, based on the URI.  The
-// resulting ArchiveRequest is suitable for being passed to ArchiveRepository()
+// resulting ArchiveRequest is suitable for being passed to Await()
 // if it's determined that the request still needs to be satisfied.
 func NewRequest(repoID int64, repo *git.Repository, uri string) (*ArchiveRequest, error) {
 	r := &ArchiveRequest{
@@ -151,13 +151,14 @@ func (aReq *ArchiveRequest) Await(ctx context.Context) (*repo_model.RepoArchiver
 	}
 }
 
+// doArchive satisfies the ArchiveRequest being passed in.  Processing
+// will occur in a separate goroutine, as this phase may take a while to
+// complete.  If the archive already exists, doArchive will not do
+// anything.  In all cases, the caller should be examining the *ArchiveRequest
+// being returned for completion, as it may be different than the one they passed
+// in.
 func doArchive(ctx context.Context, r *ArchiveRequest) (*repo_model.RepoArchiver, error) {
-	txCtx, committer, err := db.TxContext(ctx)
+	ctx, _, finished := process.GetManager().AddContext(ctx, fmt.Sprintf("ArchiveRequest[%d]: %s", r.RepoID, r.GetArchiveName()))
-	if err != nil {
-		return nil, err
-	}
-	defer committer.Close()
-	ctx, _, finished := process.GetManager().AddContext(txCtx, fmt.Sprintf("ArchiveRequest[%d]: %s", r.RepoID, r.GetArchiveName()))
 	defer finished()
 
 	archiver, err := repo_model.GetRepoArchiver(ctx, r.RepoID, r.Type, r.CommitID)
@@ -192,7 +193,7 @@ func doArchive(ctx context.Context, r *ArchiveRequest) (*repo_model.RepoArchiver
 				return nil, err
 			}
 		}
-		return archiver, committer.Commit()
+		return archiver, nil
 	}
 
 	if !errors.Is(err, os.ErrNotExist) {
@@ -261,17 +262,7 @@ func doArchive(ctx context.Context, r *ArchiveRequest) (*repo_model.RepoArchiver
 		}
 	}
 
-	return archiver, committer.Commit()
+	return archiver, nil
-}
-
-// ArchiveRepository satisfies the ArchiveRequest being passed in.  Processing
-// will occur in a separate goroutine, as this phase may take a while to
-// complete.  If the archive already exists, ArchiveRepository will not do
-// anything.  In all cases, the caller should be examining the *ArchiveRequest
-// being returned for completion, as it may be different than the one they passed
-// in.
-func ArchiveRepository(ctx context.Context, request *ArchiveRequest) (*repo_model.RepoArchiver, error) {
-	return doArchive(ctx, request)
 }
 
 var archiverQueue *queue.WorkerPoolQueue[*ArchiveRequest]
@@ -281,8 +272,10 @@ func Init(ctx context.Context) error {
 	handler := func(items ...*ArchiveRequest) []*ArchiveRequest {
 		for _, archiveReq := range items {
 			log.Trace("ArchiverData Process: %#v", archiveReq)
-			if _, err := doArchive(ctx, archiveReq); err != nil {
+			if archiver, err := doArchive(ctx, archiveReq); err != nil {
 				log.Error("Archive %v failed: %v", archiveReq, err)
+			} else {
+				log.Trace("ArchiverData Success: %#v", archiver)
 			}
 		}
 		return nil

services/repository/archiver/archiver_test.go

@@ -80,13 +80,13 @@ func TestArchive_Basic(t *testing.T) {
 	inFlight[1] = tgzReq
 	inFlight[2] = secondReq
 
-	ArchiveRepository(db.DefaultContext, zipReq)
+	doArchive(db.DefaultContext, zipReq)
-	ArchiveRepository(db.DefaultContext, tgzReq)
+	doArchive(db.DefaultContext, tgzReq)
-	ArchiveRepository(db.DefaultContext, secondReq)
+	doArchive(db.DefaultContext, secondReq)
 
 	// Make sure sending an unprocessed request through doesn't affect the queue
 	// count.
-	ArchiveRepository(db.DefaultContext, zipReq)
+	doArchive(db.DefaultContext, zipReq)
 
 	// Sleep two seconds to make sure the queue doesn't change.
 	time.Sleep(2 * time.Second)
@@ -101,7 +101,7 @@ func TestArchive_Basic(t *testing.T) {
 	// We still have the other three stalled at completion, waiting to remove
 	// from archiveInProgress.  Try to submit this new one before its
 	// predecessor has cleared out of the queue.
-	ArchiveRepository(db.DefaultContext, zipReq2)
+	doArchive(db.DefaultContext, zipReq2)
 
 	// Now we'll submit a request and TimedWaitForCompletion twice, before and
 	// after we release it.  We should trigger both the timeout and non-timeout
@@ -109,7 +109,7 @@ func TestArchive_Basic(t *testing.T) {
 	timedReq, err := NewRequest(ctx.Repo.Repository.ID, ctx.Repo.GitRepo, secondCommit+".tar.gz")
 	assert.NoError(t, err)
 	assert.NotNil(t, timedReq)
-	ArchiveRepository(db.DefaultContext, timedReq)
+	doArchive(db.DefaultContext, timedReq)
 
 	zipReq2, err = NewRequest(ctx.Repo.Repository.ID, ctx.Repo.GitRepo, firstCommit+".zip")
 	assert.NoError(t, err)