[feature] Update media manager to use internal/worker package (#543)

* update media manager to use internal/worker package, update worker with better logging

Signed-off-by: kim <grufwub@gmail.com>

* fix Queue() trace log message format operators

Signed-off-by: kim <grufwub@gmail.com>

* update media manager comment to match updated worker implementation

Signed-off-by: kim <grufwub@gmail.com>

internal/media/manager.go

@@ -20,18 +20,16 @@
 
 import (
 	"context"
-	"errors"
 	"fmt"
-	"runtime"
 	"time"
 
-	"codeberg.org/gruf/go-runners"
 	"codeberg.org/gruf/go-store/kv"
 	"github.com/robfig/cron/v3"
 	"github.com/sirupsen/logrus"
 	"github.com/spf13/viper"
 	"github.com/superseriousbusiness/gotosocial/internal/config"
 	"github.com/superseriousbusiness/gotosocial/internal/db"
+	"github.com/superseriousbusiness/gotosocial/internal/worker"
 )
 
 // Manager provides an interface for managing media: parsing, storing, and retrieving media objects like photos, videos, and gifs.
@@ -72,14 +70,6 @@ type Manager interface {
 	// 'Pruning' in this context means removing the locally stored data of the attachment (both thumbnail and full size),
 	// and setting 'cached' to false on the associated attachment.
 	PruneRemote(ctx context.Context, olderThanDays int) (int, error)
-	// NumWorkers returns the total number of workers available to this manager.
-	NumWorkers() int
-	// QueueSize returns the total capacity of the queue.
-	QueueSize() int
-	// JobsQueued returns the number of jobs currently in the task queue.
-	JobsQueued() int
-	// ActiveWorkers returns the number of workers currently performing jobs.
-	ActiveWorkers() int
 	// Stop stops the underlying worker pool of the manager. It should be called
 	// when closing GoToSocial in order to cleanly finish any in-progress jobs.
 	// It will block until workers are finished processing.
@@ -89,47 +79,54 @@ type Manager interface {
 type manager struct {
 	db           db.DB
 	storage      *kv.KVStore
-	pool         runners.WorkerPool
+	emojiWorker  *worker.Worker[*ProcessingEmoji]
+	mediaWorker  *worker.Worker[*ProcessingMedia]
 	stopCronJobs func() error
-	numWorkers   int
-	queueSize    int
 }
 
 // NewManager returns a media manager with the given db and underlying storage.
 //
 // A worker pool will also be initialized for the manager, to ensure that only
-// a limited number of media will be processed in parallel.
+// a limited number of media will be processed in parallel. The numbers of workers
-//
+// is determined from the $GOMAXPROCS environment variable (usually no. CPU cores).
-// The number of workers will be the number of CPUs available to the Go runtime,
+// See internal/worker.New() documentation for further information.
-// divided by 2 (rounding down, but always at least 1).
-//
-// The length of the queue will be the number of workers multiplied by 10.
-//
-// So for an 8 core machine, the media manager will get 4 workers, and a queue of length 40.
-// For a 4 core machine, this will be 2 workers, and a queue length of 20.
-// For a single or 2-core machine, the media manager will get 1 worker, and a queue of length 10.
 func NewManager(database db.DB, storage *kv.KVStore) (Manager, error) {
-	// configure the worker pool
-	// make sure we always have at least 1 worker even on single-core machines
-	numWorkers := runtime.NumCPU() / 2
-	if numWorkers == 0 {
-		numWorkers = 1
-	}
-	queueSize := numWorkers * 10
-
 	m := &manager{
 		db:      database,
 		storage: storage,
-		pool:       runners.NewWorkerPool(numWorkers, queueSize),
-		numWorkers: numWorkers,
-		queueSize:  queueSize,
 	}
 
-	// start the worker pool
+	// Prepare the media worker pool
-	if start := m.pool.Start(); !start {
+	m.mediaWorker = worker.New[*ProcessingMedia](-1, 10)
-		return nil, errors.New("could not start worker pool")
+	m.mediaWorker.SetProcessor(func(ctx context.Context, media *ProcessingMedia) error {
+		if err := ctx.Err(); err != nil {
+			return err
+		}
+		if _, err := media.LoadAttachment(ctx); err != nil {
+			return fmt.Errorf("error loading media %s: %v", media.AttachmentID(), err)
+		}
+		return nil
+	})
+
+	// Prepare the emoji worker pool
+	m.emojiWorker = worker.New[*ProcessingEmoji](-1, 10)
+	m.emojiWorker.SetProcessor(func(ctx context.Context, emoji *ProcessingEmoji) error {
+		if err := ctx.Err(); err != nil {
+			return err
+		}
+		if _, err := emoji.LoadEmoji(ctx); err != nil {
+			return fmt.Errorf("error loading emoji %s: %v", emoji.EmojiID(), err)
+		}
+		return nil
+	})
+
+	// Start the worker pools
+	if err := m.mediaWorker.Start(); err != nil {
+		return nil, err
+	}
+	if err := m.emojiWorker.Start(); err != nil {
+		return nil, err
 	}
-	logrus.Debugf("started media manager worker pool with %d workers and queue capacity of %d", numWorkers, queueSize)
 
 	// start remote cache cleanup cronjob if configured
 	cacheCleanupDays := viper.GetInt(config.Keys.MediaRemoteCacheDays)
@@ -188,22 +185,7 @@ func (m *manager) ProcessMedia(ctx context.Context, data DataFunc, postData Post
 	if err != nil {
 		return nil, err
 	}
-
+	m.mediaWorker.Queue(processingMedia)
-	logrus.Tracef("ProcessMedia: about to enqueue media with attachmentID %s, queue length is %d", processingMedia.AttachmentID(), m.pool.Queue())
-	m.pool.Enqueue(func(innerCtx context.Context) {
-		select {
-		case <-innerCtx.Done():
-			// if the inner context is done that means the worker pool is closing, so we should just return
-			return
-		default:
-			// start loading the media already for the caller's convenience
-			if _, err := processingMedia.LoadAttachment(innerCtx); err != nil {
-				logrus.Errorf("ProcessMedia: error processing media with attachmentID %s: %s", processingMedia.AttachmentID(), err)
-			}
-		}
-	})
-	logrus.Tracef("ProcessMedia: succesfully queued media with attachmentID %s, queue length is %d", processingMedia.AttachmentID(), m.pool.Queue())
-
 	return processingMedia, nil
 }
 
@@ -212,22 +194,7 @@ func (m *manager) ProcessEmoji(ctx context.Context, data DataFunc, postData Post
 	if err != nil {
 		return nil, err
 	}
-
+	m.emojiWorker.Queue(processingEmoji)
-	logrus.Tracef("ProcessEmoji: about to enqueue emoji with id %s, queue length is %d", processingEmoji.EmojiID(), m.pool.Queue())
-	m.pool.Enqueue(func(innerCtx context.Context) {
-		select {
-		case <-innerCtx.Done():
-			// if the inner context is done that means the worker pool is closing, so we should just return
-			return
-		default:
-			// start loading the emoji already for the caller's convenience
-			if _, err := processingEmoji.LoadEmoji(innerCtx); err != nil {
-				logrus.Errorf("ProcessEmoji: error processing emoji with id %s: %s", processingEmoji.EmojiID(), err)
-			}
-		}
-	})
-	logrus.Tracef("ProcessEmoji: succesfully queued emoji with id %s, queue length is %d", processingEmoji.EmojiID(), m.pool.Queue())
-
 	return processingEmoji, nil
 }
 
@@ -236,51 +203,26 @@ func (m *manager) RecacheMedia(ctx context.Context, data DataFunc, postData Post
 	if err != nil {
 		return nil, err
 	}
-
+	m.mediaWorker.Queue(processingRecache)
-	logrus.Tracef("RecacheMedia: about to enqueue recache with attachmentID %s, queue length is %d", processingRecache.AttachmentID(), m.pool.Queue())
-	m.pool.Enqueue(func(innerCtx context.Context) {
-		select {
-		case <-innerCtx.Done():
-			// if the inner context is done that means the worker pool is closing, so we should just return
-			return
-		default:
-			// start loading the media already for the caller's convenience
-			if _, err := processingRecache.LoadAttachment(innerCtx); err != nil {
-				logrus.Errorf("RecacheMedia: error processing recache with attachmentID %s: %s", processingRecache.AttachmentID(), err)
-			}
-		}
-	})
-	logrus.Tracef("RecacheMedia: succesfully queued recache with attachmentID %s, queue length is %d", processingRecache.AttachmentID(), m.pool.Queue())
-
 	return processingRecache, nil
 }
 
-func (m *manager) NumWorkers() int {
-	return m.numWorkers
-}
-
-func (m *manager) QueueSize() int {
-	return m.queueSize
-}
-
-func (m *manager) JobsQueued() int {
-	return m.pool.Queue()
-}
-
-func (m *manager) ActiveWorkers() int {
-	return m.pool.Workers()
-}
-
 func (m *manager) Stop() error {
-	logrus.Info("stopping media manager worker pool")
+	// Stop media and emoji worker pools
-	if !m.pool.Stop() {
+	mediaErr := m.mediaWorker.Stop()
-		return errors.New("could not stop media manager worker pool")
+	emojiErr := m.emojiWorker.Stop()
+
+	var cronErr error
+
+	if m.stopCronJobs != nil {
+		// only set if cache prune age > 0
+		cronErr = m.stopCronJobs()
 	}
 
-	if m.stopCronJobs != nil { // only defined if cron jobs are actually running
+	if mediaErr != nil {
-		logrus.Info("stopping media manager cache cleanup jobs")
+		return mediaErr
-		return m.stopCronJobs()
+	} else if emojiErr != nil {
+		return emojiErr
 	}
-
+	return cronErr
-	return nil
 }

internal/media/manager_test.go

@@ -443,8 +443,6 @@ func (suite *ManagerTestSuite) TestSimpleJpegQueueSpamming() {
 	}
 
 	for _, processingMedia := range inProcess {
-		fmt.Printf("\n\n\nactive workers: %d, queue length: %d\n\n\n", suite.manager.ActiveWorkers(), suite.manager.JobsQueued())
-
 		// fetch the attachment id from the processing media
 		attachmentID := processingMedia.AttachmentID()
 

internal/worker/workers.go

@@ -3,6 +3,8 @@
 import (
 	"context"
 	"errors"
+	"fmt"
+	"path"
 	"reflect"
 	"runtime"
 
@@ -17,34 +19,44 @@ type Worker[MsgType any] struct {
 	prefix  string // contains type prefix for logging
 }
 
-// New returns a new Worker[MsgType] with given number of workers and queue size
+// New returns a new Worker[MsgType] with given number of workers and queue ratio,
-// (see runners.WorkerPool for more information on args). If args < 1 then suitable
+// where the queue ratio is multiplied by no. workers to get queue size. If args < 1
-// defaults are determined from the runtime's GOMAXPROCS variable.
+// then suitable defaults are determined from the runtime's GOMAXPROCS variable.
-func New[MsgType any](workers int, queue int) *Worker[MsgType] {
+func New[MsgType any](workers int, queueRatio int) *Worker[MsgType] {
+	var zero MsgType
+
 	if workers < 1 {
 		// ensure sensible workers
 		workers = runtime.GOMAXPROCS(0)
 	}
-	if queue < 1 {
+	if queueRatio < 1 {
-		// ensure sensible queue
+		// ensure sensible ratio
-		queue = workers * 100
+		queueRatio = 100
 	}
 
+	// Calculate the short type string for the msg type
+	msgType := reflect.TypeOf(zero).String()
+	_, msgType = path.Split(msgType)
+
 	w := &Worker[MsgType]{
-		workers: runners.NewWorkerPool(workers, queue),
+		workers: runners.NewWorkerPool(workers, workers*queueRatio),
 		process: nil,
-		prefix:  reflect.TypeOf(Worker[MsgType]{}).String(), //nolint
+		prefix:  fmt.Sprintf("worker.Worker[%s]", msgType),
 	}
 
 	// Log new worker creation with type prefix
-	logrus.Infof("%s created with workers=%d queue=%d", w.prefix, workers, queue)
+	logrus.Infof("%s created with workers=%d queue=%d",
+		w.prefix,
+		workers,
+		workers*queueRatio,
+	)
 
 	return w
 }
 
 // Start will attempt to start the underlying worker pool, or return error.
 func (w *Worker[MsgType]) Start() error {
-	logrus.Info(w.prefix, "starting")
+	logrus.Infof("%s starting", w.prefix)
 
 	// Check processor was set
 	if w.process == nil {
@@ -61,7 +73,7 @@ func (w *Worker[MsgType]) Start() error {
 
 // Stop will attempt to stop the underlying worker pool, or return error.
 func (w *Worker[MsgType]) Stop() error {
-	logrus.Info(w.prefix, "stopping")
+	logrus.Infof("%s stopping", w.prefix)
 
 	// Attempt to stop pool
 	if !w.workers.Stop() {
@@ -74,17 +86,19 @@ func (w *Worker[MsgType]) Stop() error {
 // SetProcessor will set the Worker's processor function, which is called for each queued message.
 func (w *Worker[MsgType]) SetProcessor(fn func(context.Context, MsgType) error) {
 	if w.process != nil {
-		logrus.Panic(w.prefix, "Worker.process is already set")
+		logrus.Panicf("%s Worker.process is already set", w.prefix)
 	}
 	w.process = fn
 }
 
 // Queue will queue provided message to be processed with there's a free worker.
 func (w *Worker[MsgType]) Queue(msg MsgType) {
-	logrus.Tracef("%s queueing message: %+v", w.prefix, msg)
+	logrus.Tracef("%s queueing message (workers=%d queue=%d): %+v",
+		w.prefix, w.workers.Workers(), w.workers.Queue(), msg,
+	)
 	w.workers.Enqueue(func(ctx context.Context) {
 		if err := w.process(ctx, msg); err != nil {
-			logrus.Error(err)
+			logrus.Errorf("%s %v", w.prefix, err)
 		}
 	})
 }