feat(metric): add success, failure and submitted tasks

metric.go

@@ -7,10 +7,21 @@ type Metric interface {
 	IncBusyWorker()
 	DecBusyWorker()
 	BusyWorkers() uint64
+	SuccessTasks() uint64
+	FailureTasks() uint64
+	SubmittedTasks() uint64
+	IncSuccessTask()
+	IncFailureTask()
+	IncSubmittedTask()
 }
 
+var _ Metric = (*metric)(nil)
+
 type metric struct {
-	busyWorkers uint64
+	busyWorkers    uint64
+	successTasks   uint64
+	failureTasks   uint64
+	submittedTasks uint64
 }
 
 // NewMetric for default metric structure
@@ -29,3 +40,27 @@ func (m *metric) DecBusyWorker() {
 func (m *metric) BusyWorkers() uint64 {
 	return atomic.LoadUint64(&m.busyWorkers)
 }
+
+func (m *metric) IncSuccessTask() {
+	atomic.AddUint64(&m.successTasks, 1)
+}
+
+func (m *metric) IncFailureTask() {
+	atomic.AddUint64(&m.failureTasks, 1)
+}
+
+func (m *metric) IncSubmittedTask() {
+	atomic.AddUint64(&m.submittedTasks, 1)
+}
+
+func (m *metric) SuccessTasks() uint64 {
+	return atomic.LoadUint64(&m.successTasks)
+}
+
+func (m *metric) FailureTasks() uint64 {
+	return atomic.LoadUint64(&m.failureTasks)
+}
+
+func (m *metric) SubmittedTasks() uint64 {
+	return atomic.LoadUint64(&m.submittedTasks)
+}

metric_test.go

@@ -0,0 +1,49 @@
+package queue
+
+import (
+	"context"
+	"errors"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestMetricData(t *testing.T) {
+	w := NewConsumer(
+		WithFn(func(ctx context.Context, m QueuedMessage) error {
+			switch string(m.Bytes()) {
+			case "foo1":
+				panic("missing something")
+			case "foo2":
+				return errors.New("missing something")
+			case "foo3":
+				return nil
+			}
+			return nil
+		}),
+	)
+	q, err := NewQueue(
+		WithWorker(w),
+		WithWorkerCount(4),
+	)
+	assert.NoError(t, err)
+	assert.NoError(t, q.Queue(mockMessage{
+		message: "foo1",
+	}))
+	assert.NoError(t, q.Queue(mockMessage{
+		message: "foo2",
+	}))
+	assert.NoError(t, q.Queue(mockMessage{
+		message: "foo3",
+	}))
+	assert.NoError(t, q.Queue(mockMessage{
+		message: "foo4",
+	}))
+	q.Start()
+	time.Sleep(50 * time.Millisecond)
+	assert.Equal(t, 4, q.SubmittedTasks())
+	assert.Equal(t, 2, q.SuccessTasks())
+	assert.Equal(t, 2, q.FailureTasks())
+	q.Release()
+}

queue.go

@@ -79,16 +79,6 @@ func NewQueue(opts ...Option) (*Queue, error) {
 	return q, nil
 }
 
-// Capacity for queue max size
-func (q *Queue) Capacity() int {
-	return q.worker.Capacity()
-}
-
-// Usage for count of queue usage
-func (q *Queue) Usage() int {
-	return q.worker.Usage()
-}
-
 // Start to enable all worker
 func (q *Queue) Start() {
 	go q.start()
@@ -123,24 +113,24 @@ func (q *Queue) BusyWorkers() int {
 	return int(q.metric.BusyWorkers())
 }
 
-// Wait all process
-func (q *Queue) Wait() {
-	q.routineGroup.Wait()
+// BusyWorkers returns the numbers of success tasks.
+func (q *Queue) SuccessTasks() int {
+	return int(q.metric.SuccessTasks())
 }
 
-func (q *Queue) handleQueue(timeout time.Duration, job QueuedMessage) error {
-	if atomic.LoadInt32(&q.stopFlag) == 1 {
-		return ErrQueueShutdown
-	}
+// BusyWorkers returns the numbers of failure tasks.
+func (q *Queue) FailureTasks() int {
+	return int(q.metric.FailureTasks())
+}
 
-	data := Job{
-		Timeout: timeout,
-		Payload: job.Bytes(),
-	}
+// BusyWorkers returns the numbers of submitted tasks.
+func (q *Queue) SubmittedTasks() int {
+	return int(q.metric.SubmittedTasks())
+}
 
-	return q.worker.Queue(Job{
-		Payload: data.Encode(),
-	})
+// Wait all process
+func (q *Queue) Wait() {
+	q.routineGroup.Wait()
 }
 
 // Queue to queue all job
@@ -153,19 +143,25 @@ func (q *Queue) QueueWithTimeout(timeout time.Duration, job QueuedMessage) error
 	return q.handleQueue(timeout, job)
 }
 
-func (q *Queue) handleQueueTask(timeout time.Duration, task TaskFunc) error {
+func (q *Queue) handleQueue(timeout time.Duration, job QueuedMessage) error {
 	if atomic.LoadInt32(&q.stopFlag) == 1 {
 		return ErrQueueShutdown
 	}
 
 	data := Job{
 		Timeout: timeout,
+		Payload: job.Bytes(),
 	}
 
-	return q.worker.Queue(Job{
-		Task:    task,
+	if err := q.worker.Queue(Job{
 		Payload: data.Encode(),
-	})
+	}); err != nil {
+		return err
+	}
+
+	q.metric.IncSubmittedTask()
+
+	return nil
 }
 
 // QueueTask to queue job task
@@ -178,18 +174,48 @@ func (q *Queue) QueueTaskWithTimeout(timeout time.Duration, task TaskFunc) error
 	return q.handleQueueTask(timeout, task)
 }
 
+func (q *Queue) handleQueueTask(timeout time.Duration, task TaskFunc) error {
+	if atomic.LoadInt32(&q.stopFlag) == 1 {
+		return ErrQueueShutdown
+	}
+
+	data := Job{
+		Timeout: timeout,
+	}
+
+	if err := q.worker.Queue(Job{
+		Task:    task,
+		Payload: data.Encode(),
+	}); err != nil {
+		return err
+	}
+
+	q.metric.IncSubmittedTask()
+
+	return nil
+}
+
 func (q *Queue) work(task QueuedMessage) {
+	var err error
 	// to handle panic cases from inside the worker
 	// in such case, we start a new goroutine
 	defer func() {
 		q.metric.DecBusyWorker()
-		if err := recover(); err != nil {
+		e := recover()
+		if e != nil {
 			q.logger.Errorf("panic error: %v", err)
 		}
 		q.schedule()
+
+		// increase success or failure number
+		if err == nil && e == nil {
+			q.metric.IncSuccessTask()
+		} else {
+			q.metric.IncFailureTask()
+		}
 	}()
 
-	if err := q.worker.Run(task); err != nil {
+	if err = q.worker.Run(task); err != nil {
 		q.logger.Errorf("runtime error: %s", err.Error())
 	}
 }

queue_test.go

@@ -34,7 +34,7 @@ func TestNewQueue(t *testing.T) {
 	assert.NotNil(t, q)
 
 	q.Start()
-	assert.Equal(t, uint64(0), w.BusyWorkers())
+	assert.Equal(t, 0, q.BusyWorkers())
 	q.Shutdown()
 	q.Wait()
 }
@@ -59,31 +59,6 @@ func TestShtdonwOnce(t *testing.T) {
 	assert.Equal(t, 0, q.BusyWorkers())
 }
 
-func TestWorkerStatus(t *testing.T) {
-	m := mockMessage{
-		message: "foobar",
-	}
-	w := &messageWorker{
-		messages: make(chan QueuedMessage, 100),
-	}
-	q, err := NewQueue(
-		WithWorker(w),
-		WithWorkerCount(2),
-	)
-	assert.NoError(t, err)
-	assert.NotNil(t, q)
-
-	assert.NoError(t, q.Queue(m))
-	assert.NoError(t, q.Queue(m))
-	assert.NoError(t, q.QueueWithTimeout(10*time.Millisecond, m))
-	assert.NoError(t, q.QueueWithTimeout(10*time.Millisecond, m))
-	assert.Equal(t, 100, q.Capacity())
-	assert.Equal(t, 4, q.Usage())
-	q.Start()
-	time.Sleep(40 * time.Millisecond)
-	q.Release()
-}
-
 func TestCapacityReached(t *testing.T) {
 	w := &messageWorker{
 		messages: make(chan QueuedMessage, 1),
@@ -160,7 +135,6 @@ func TestQueueTaskJob(t *testing.T) {
 		return nil
 	}))
 	time.Sleep(50 * time.Millisecond)
-	assert.Equal(t, uint64(0), w.BusyWorkers())
 	q.Shutdown()
 	assert.Equal(t, ErrQueueShutdown, q.QueueTask(func(ctx context.Context) error {
 		return nil

worker.go

@@ -10,12 +10,6 @@ type Worker interface {
 	Queue(task QueuedMessage) error
 	// Request to get message from Queue
 	Request() (QueuedMessage, error)
-	// Capacity queue capacity = cap(channel name)
-	Capacity() int
-	// Usage is how many message in queue
-	Usage() int
-	// BusyWorkers return count of busy worker currently
-	BusyWorkers() uint64
 }
 
 // QueuedMessage ...

worker_empty.go

@@ -9,6 +9,3 @@ func (w *emptyWorker) Run(task QueuedMessage) error    { return nil }
 func (w *emptyWorker) Shutdown() error                 { return nil }
 func (w *emptyWorker) Queue(task QueuedMessage) error  { return nil }
 func (w *emptyWorker) Request() (QueuedMessage, error) { return nil, nil }
-func (w *emptyWorker) Capacity() int                   { return 0 }
-func (w *emptyWorker) Usage() int                      { return 0 }
-func (w *emptyWorker) BusyWorkers() uint64             { return uint64(0) }

worker_message.go

@@ -42,7 +42,3 @@ func (w *messageWorker) Request() (QueuedMessage, error) {
 		return nil, errors.New("no message in queue")
 	}
 }
-
-func (w *messageWorker) Capacity() int       { return cap(w.messages) }
-func (w *messageWorker) Usage() int          { return len(w.messages) }
-func (w *messageWorker) BusyWorkers() uint64 { return uint64(0) }

worker_task.go

@@ -43,7 +43,3 @@ func (w *taskWorker) Request() (QueuedMessage, error) {
 		return nil, errors.New("no message in queue")
 	}
 }
-
-func (w *taskWorker) Capacity() int       { return cap(w.messages) }
-func (w *taskWorker) Usage() int          { return len(w.messages) }
-func (w *taskWorker) BusyWorkers() uint64 { return uint64(0) }