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收窄 assignment 队列职责

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panxiao81
2026-09-20 19:06:04 +00:00
parent 27787d7899
commit a856176c56
5 changed files with 98 additions and 113 deletions
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internal/assignmentqueue/jetstream.go
+14 -59
View File
@@ -48,8 +48,8 @@ func (p Publisher) Dispatch(ctx context.Context, assignment taskassignment.Assig
return nil
}
type Handler interface {
Handle(context.Context, taskassignment.Assignment) (bool, error)
type Accepter interface {
Accept(context.Context, taskassignment.Assignment) (bool, error)
}
// Message is the subset of jetstream.Msg needed by one reconciliation.
@@ -57,27 +57,25 @@ type Message interface {
Data() []byte
DoubleAck(context.Context) error
NakWithDelay(time.Duration) error
InProgress() error
TermWithReason(string) error
}
// Processor maps one delivery to one idempotent worker reconciliation.
type Processor struct {
TrustDomain string
Handler Handler
RetryDelay time.Duration
PollInterval time.Duration
TrustDomain string
Accepter Accepter
RetryDelay time.Duration
}
func (p Processor) Process(ctx context.Context, message Message) error {
if p.Handler == nil {
return errors.New("assignment handler is required")
if p.Accepter == nil {
return errors.New("assignment accepter is required")
}
assignment, err := taskassignment.Unmarshal(message.Data(), p.TrustDomain)
if err != nil {
return errors.Join(err, message.TermWithReason("invalid assignment"))
}
done, err := p.Handler.Handle(ctx, assignment)
accepted, err := p.Accepter.Accept(ctx, assignment)
if err != nil {
delay := p.RetryDelay
if delay <= 0 {
@@ -85,60 +83,17 @@ func (p Processor) Process(ctx context.Context, message Message) error {
}
return errors.Join(err, message.NakWithDelay(delay))
}
if done {
if accepted {
if err := message.DoubleAck(ctx); err != nil {
return fmt.Errorf("ack assignment %s: %w", assignment.ID, err)
}
return nil
}
if err := message.InProgress(); err != nil {
return fmt.Errorf("extend assignment %s acknowledgement: %w", assignment.ID, err)
}
return nil
}
// ProcessUntilDone holds one durable delivery while repeatedly reconciling
// backend state. Cancellation leaves it unacknowledged for another process.
func (p Processor) ProcessUntilDone(ctx context.Context, message Message) error {
if p.Handler == nil {
return errors.New("assignment handler is required")
}
assignment, err := taskassignment.Unmarshal(message.Data(), p.TrustDomain)
if err != nil {
return errors.Join(err, message.TermWithReason("invalid assignment"))
}
interval := p.PollInterval
if interval <= 0 {
interval = 2 * time.Second
}
for {
done, handleErr := p.Handler.Handle(ctx, assignment)
if handleErr != nil {
delay := p.RetryDelay
if delay <= 0 {
delay = 15 * time.Second
}
return errors.Join(handleErr, message.NakWithDelay(delay))
}
if done {
if err := message.DoubleAck(ctx); err != nil {
return fmt.Errorf("ack assignment %s: %w", assignment.ID, err)
}
return nil
}
if err := message.InProgress(); err != nil {
return fmt.Errorf("extend assignment %s acknowledgement: %w", assignment.ID, err)
}
timer := time.NewTimer(interval)
select {
case <-ctx.Done():
if !timer.Stop() {
<-timer.C
}
return ctx.Err()
case <-timer.C:
}
delay := p.RetryDelay
if delay <= 0 {
delay = 2 * time.Second
}
return message.NakWithDelay(delay)
}
type consumeAPI interface {
@@ -198,7 +153,7 @@ func (c ConsumerComponent) Run(ctx context.Context) error {
go func() {
defer workers.Done()
defer func() { <-semaphore }()
if err := c.Processor.ProcessUntilDone(ctx, message); err != nil && !errors.Is(err, context.Canceled) && c.OnError != nil {
if err := c.Processor.Process(ctx, message); err != nil && !errors.Is(err, context.Canceled) && c.OnError != nil {
c.OnError(err)
}
}()
internal/assignmentqueue/jetstream_test.go
+12 -51
View File
@@ -52,32 +52,25 @@ func TestPublisherUsesBackendSubjectAndAssignmentDeduplication(t *testing.T) {
}
}
type fakeHandler struct {
done bool
err error
remaining int
type fakeAccepter struct {
accepted bool
err error
}
func (h *fakeHandler) Handle(context.Context, taskassignment.Assignment) (bool, error) {
if h.remaining > 0 {
h.remaining--
return false, nil
}
return h.done, h.err
func (a *fakeAccepter) Accept(context.Context, taskassignment.Assignment) (bool, error) {
return a.accepted, a.err
}
type fakeMessage struct {
data []byte
acked int
nacked time.Duration
inProgress int
terminated int
}
func (m *fakeMessage) Data() []byte { return m.data }
func (m *fakeMessage) DoubleAck(context.Context) error { m.acked++; return nil }
func (m *fakeMessage) NakWithDelay(delay time.Duration) error { m.nacked = delay; return nil }
func (m *fakeMessage) InProgress() error { m.inProgress++; return nil }
func (m *fakeMessage) TermWithReason(string) error { m.terminated++; return nil }
func encodedAssignment(t *testing.T) []byte {
@@ -89,24 +82,24 @@ func encodedAssignment(t *testing.T) []byte {
return data
}
func TestProcessorAcknowledgesOnlyCompletedAssignment(t *testing.T) {
func TestProcessorAcknowledgesPersistedHandoff(t *testing.T) {
message := &fakeMessage{data: encodedAssignment(t)}
processor := Processor{TrustDomain: "ddupan.top", Handler: &fakeHandler{done: true}}
processor := Processor{TrustDomain: "ddupan.top", Accepter: &fakeAccepter{accepted: true}}
if err := processor.Process(context.Background(), message); err != nil {
t.Fatal(err)
}
if message.acked != 1 || message.inProgress != 0 || message.nacked != 0 {
if message.acked != 1 || message.nacked != 0 {
t.Fatalf("message = %#v", message)
}
}
func TestProcessorKeepsRunningAssignmentPending(t *testing.T) {
func TestProcessorRetriesUntilBackendHandoffIsDurable(t *testing.T) {
message := &fakeMessage{data: encodedAssignment(t)}
processor := Processor{TrustDomain: "ddupan.top", Handler: &fakeHandler{}}
processor := Processor{TrustDomain: "ddupan.top", Accepter: &fakeAccepter{}, RetryDelay: 2 * time.Second}
if err := processor.Process(context.Background(), message); err != nil {
t.Fatal(err)
}
if message.acked != 0 || message.inProgress != 1 {
if message.acked != 0 || message.nacked != 2*time.Second {
t.Fatalf("message = %#v", message)
}
}
@@ -115,7 +108,7 @@ func TestProcessorRetriesBackendFailureAndTerminatesPoisonMessage(t *testing.T)
retry := &fakeMessage{data: encodedAssignment(t)}
processor := Processor{
TrustDomain: "ddupan.top",
Handler: &fakeHandler{err: errors.New("backend unavailable")},
Accepter: &fakeAccepter{err: errors.New("backend unavailable")},
RetryDelay: time.Minute,
}
if err := processor.Process(context.Background(), retry); err == nil {
@@ -134,38 +127,6 @@ func TestProcessorRetriesBackendFailureAndTerminatesPoisonMessage(t *testing.T)
}
}
func TestProcessUntilDoneReconcilesWithoutRedelivery(t *testing.T) {
message := &fakeMessage{data: encodedAssignment(t)}
processor := Processor{
TrustDomain: "ddupan.top",
Handler: &fakeHandler{done: true, remaining: 2},
PollInterval: time.Millisecond,
}
if err := processor.ProcessUntilDone(context.Background(), message); err != nil {
t.Fatal(err)
}
if message.inProgress != 2 || message.acked != 1 || message.nacked != 0 {
t.Fatalf("message = %#v", message)
}
}
func TestProcessUntilDoneLeavesMessagePendingOnShutdown(t *testing.T) {
message := &fakeMessage{data: encodedAssignment(t)}
processor := Processor{
TrustDomain: "ddupan.top",
Handler: &fakeHandler{},
PollInterval: time.Hour,
}
ctx, cancel := context.WithCancel(context.Background())
cancel()
if err := processor.ProcessUntilDone(ctx, message); !errors.Is(err, context.Canceled) {
t.Fatalf("error = %v", err)
}
if message.acked != 0 || message.nacked != 0 || message.terminated != 0 {
t.Fatalf("message = %#v", message)
}
}
type fakeConsumerManager struct{ config jetstream.ConsumerConfig }
func (m *fakeConsumerManager) CreateOrUpdateConsumer(_ context.Context, _ string, config jetstream.ConsumerConfig) (jetstream.Consumer, error) {