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remove unnecessary dependencies between plugins
remove unnecessary dependencies between plugins upgrade go-micro.dev/v4 to v4.2.1
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,239 @@ | ||
| // Package memory provides a memory broker | ||
| package broker | ||
|
|
||
| import ( | ||
| "context" | ||
| "errors" | ||
| "math/rand" | ||
| "sync" | ||
| "time" | ||
|
|
||
| "github.com/google/uuid" | ||
| "go-micro.dev/v4/logger" | ||
| maddr "go-micro.dev/v4/util/addr" | ||
| mnet "go-micro.dev/v4/util/net" | ||
| ) | ||
|
|
||
| type memoryBroker struct { | ||
| opts Options | ||
|
|
||
| addr string | ||
| sync.RWMutex | ||
| connected bool | ||
| Subscribers map[string][]*memorySubscriber | ||
| } | ||
|
|
||
| type memoryEvent struct { | ||
| opts Options | ||
| topic string | ||
| err error | ||
| message interface{} | ||
| } | ||
|
|
||
| type memorySubscriber struct { | ||
| id string | ||
| topic string | ||
| exit chan bool | ||
| handler Handler | ||
| opts SubscribeOptions | ||
| } | ||
|
|
||
| func (m *memoryBroker) Options() Options { | ||
| return m.opts | ||
| } | ||
|
|
||
| func (m *memoryBroker) Address() string { | ||
| return m.addr | ||
| } | ||
|
|
||
| func (m *memoryBroker) Connect() error { | ||
| m.Lock() | ||
| defer m.Unlock() | ||
|
|
||
| if m.connected { | ||
| return nil | ||
| } | ||
|
|
||
| // use 127.0.0.1 to avoid scan of all network interfaces | ||
| addr, err := maddr.Extract("127.0.0.1") | ||
| if err != nil { | ||
| return err | ||
| } | ||
| i := rand.Intn(20000) | ||
| // set addr with port | ||
| addr = mnet.HostPort(addr, 10000+i) | ||
|
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||
| m.addr = addr | ||
| m.connected = true | ||
|
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| return nil | ||
| } | ||
|
|
||
| func (m *memoryBroker) Disconnect() error { | ||
| m.Lock() | ||
| defer m.Unlock() | ||
|
|
||
| if !m.connected { | ||
| return nil | ||
| } | ||
|
|
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| m.connected = false | ||
|
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| return nil | ||
| } | ||
|
|
||
| func (m *memoryBroker) Init(opts ...Option) error { | ||
| for _, o := range opts { | ||
| o(&m.opts) | ||
| } | ||
| return nil | ||
| } | ||
|
|
||
| func (m *memoryBroker) Publish(topic string, msg *Message, opts ...PublishOption) error { | ||
| m.RLock() | ||
| if !m.connected { | ||
| m.RUnlock() | ||
| return errors.New("not connected") | ||
| } | ||
|
|
||
| subs, ok := m.Subscribers[topic] | ||
| m.RUnlock() | ||
| if !ok { | ||
| return nil | ||
| } | ||
|
|
||
| var v interface{} | ||
| if m.opts.Codec != nil { | ||
| buf, err := m.opts.Codec.Marshal(msg) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| v = buf | ||
| } else { | ||
| v = msg | ||
| } | ||
|
|
||
| p := &memoryEvent{ | ||
| topic: topic, | ||
| message: v, | ||
| opts: m.opts, | ||
| } | ||
|
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||
| for _, sub := range subs { | ||
| if err := sub.handler(p); err != nil { | ||
| p.err = err | ||
| if eh := m.opts.ErrorHandler; eh != nil { | ||
| eh(p) | ||
| continue | ||
| } | ||
| return err | ||
| } | ||
| } | ||
|
|
||
| return nil | ||
| } | ||
|
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| func (m *memoryBroker) Subscribe(topic string, handler Handler, opts ...SubscribeOption) (Subscriber, error) { | ||
| m.RLock() | ||
| if !m.connected { | ||
| m.RUnlock() | ||
| return nil, errors.New("not connected") | ||
| } | ||
| m.RUnlock() | ||
|
|
||
| var options SubscribeOptions | ||
| for _, o := range opts { | ||
| o(&options) | ||
| } | ||
|
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| sub := &memorySubscriber{ | ||
| exit: make(chan bool, 1), | ||
| id: uuid.New().String(), | ||
| topic: topic, | ||
| handler: handler, | ||
| opts: options, | ||
| } | ||
|
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||
| m.Lock() | ||
| m.Subscribers[topic] = append(m.Subscribers[topic], sub) | ||
| m.Unlock() | ||
|
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||
| go func() { | ||
| <-sub.exit | ||
| m.Lock() | ||
| var newSubscribers []*memorySubscriber | ||
| for _, sb := range m.Subscribers[topic] { | ||
| if sb.id == sub.id { | ||
| continue | ||
| } | ||
| newSubscribers = append(newSubscribers, sb) | ||
| } | ||
| m.Subscribers[topic] = newSubscribers | ||
| m.Unlock() | ||
| }() | ||
|
|
||
| return sub, nil | ||
| } | ||
|
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||
| func (m *memoryBroker) String() string { | ||
| return "memory" | ||
| } | ||
|
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||
| func (m *memoryEvent) Topic() string { | ||
| return m.topic | ||
| } | ||
|
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| func (m *memoryEvent) Message() *Message { | ||
| switch v := m.message.(type) { | ||
| case *Message: | ||
| return v | ||
| case []byte: | ||
| msg := &Message{} | ||
| if err := m.opts.Codec.Unmarshal(v, msg); err != nil { | ||
| if logger.V(logger.ErrorLevel, logger.DefaultLogger) { | ||
| logger.Errorf("[memory]: failed to unmarshal: %v\n", err) | ||
| } | ||
| return nil | ||
| } | ||
| return msg | ||
| } | ||
|
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| return nil | ||
| } | ||
|
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| func (m *memoryEvent) Ack() error { | ||
| return nil | ||
| } | ||
|
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| func (m *memoryEvent) Error() error { | ||
| return m.err | ||
| } | ||
|
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| func (m *memorySubscriber) Options() SubscribeOptions { | ||
| return m.opts | ||
| } | ||
|
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| func (m *memorySubscriber) Topic() string { | ||
| return m.topic | ||
| } | ||
|
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| func (m *memorySubscriber) Unsubscribe() error { | ||
| m.exit <- true | ||
| return nil | ||
| } | ||
|
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| func NewMemoryBroker(opts ...Option) Broker { | ||
| options := Options{ | ||
| Context: context.Background(), | ||
| } | ||
|
|
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| rand.Seed(time.Now().UnixNano()) | ||
| for _, o := range opts { | ||
| o(&options) | ||
| } | ||
|
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| return &memoryBroker{ | ||
| opts: options, | ||
| Subscribers: make(map[string][]*memorySubscriber), | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,50 @@ | ||
| package broker_test | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "testing" | ||
|
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| "go-micro.dev/v4/broker" | ||
| ) | ||
|
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| func TestMemoryBroker(t *testing.T) { | ||
| b := broker.NewMemoryBroker() | ||
|
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| if err := b.Connect(); err != nil { | ||
| t.Fatalf("Unexpected connect error %v", err) | ||
| } | ||
|
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| topic := "test" | ||
| count := 10 | ||
|
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| fn := func(p broker.Event) error { | ||
| return nil | ||
| } | ||
|
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| sub, err := b.Subscribe(topic, fn) | ||
| if err != nil { | ||
| t.Fatalf("Unexpected error subscribing %v", err) | ||
| } | ||
|
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| for i := 0; i < count; i++ { | ||
| message := &broker.Message{ | ||
| Header: map[string]string{ | ||
| "foo": "bar", | ||
| "id": fmt.Sprintf("%d", i), | ||
| }, | ||
| Body: []byte(`hello world`), | ||
| } | ||
|
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| if err := b.Publish(topic, message); err != nil { | ||
| t.Fatalf("Unexpected error publishing %d", i) | ||
| } | ||
| } | ||
|
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| if err := sub.Unsubscribe(); err != nil { | ||
| t.Fatalf("Unexpected error unsubscribing from %s: %v", topic, err) | ||
| } | ||
|
|
||
| if err := b.Disconnect(); err != nil { | ||
| t.Fatalf("Unexpected connect error %v", err) | ||
| } | ||
| } |
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