Fix polaris Subscriber #2026

registry/polaris/core.go

@@ -32,13 +32,13 @@ import (
 	"dubbo.apache.org/dubbo-go/v3/remoting"
 )
 
-type subscriber func(remoting.EventType, []model.Instance)
+type item func(remoting.EventType, []model.Instance)
 
 type PolarisServiceWatcher struct {
 	consumer       api.ConsumerAPI
 	subscribeParam *api.WatchServiceRequest
 	lock           *sync.RWMutex
-	subscribers    []subscriber
+	subscribers    []item
 	execOnce       *sync.Once
 }
 
@@ -48,7 +48,7 @@ func newPolarisWatcher(param *api.WatchServiceRequest, consumer api.ConsumerAPI)
 		subscribeParam: param,
 		consumer:       consumer,
 		lock:           &sync.RWMutex{},
-		subscribers:    make([]subscriber, 0),
+		subscribers:    make([]item, 0),
 		execOnce:       &sync.Once{},
 	}
 	return watcher, nil

registry/polaris/listener.go

@@ -51,6 +51,7 @@ func NewPolarisListener(url *common.URL) (*polarisListener, error) {
 		events:    gxchan.NewUnboundedChan(32),
 		closeCh:   make(chan struct{}),
 	}
+
 	return listener, nil
 }
 

registry/polaris/registry.go

@@ -150,6 +150,11 @@ func (pr *polarisRegistry) UnRegister(conf *common.URL) error {
 
 // Subscribe returns nil if subscribing registry successfully. If not returns an error.
 func (pr *polarisRegistry) Subscribe(url *common.URL, notifyListener registry.NotifyListener) error {
+	var (
+		newParam    api.WatchServiceRequest
+		newConsumer api.ConsumerAPI
+	)
+
 	role, _ := strconv.Atoi(url.GetParam(constant.RegistryRoleKey, ""))
 	if role != common.CONSUMER {
 		return nil
@@ -163,8 +168,17 @@ func (pr *polarisRegistry) Subscribe(url *common.URL, notifyListener registry.No
 			continue
 		}
 
+		watcher, err := newPolarisWatcher(&newParam, newConsumer)
+		if err != nil {
+			logger.Warnf("getwatcher() = err:%v", perrors.WithStack(err))
+			timer := time.NewTimer(time.Duration(RegistryConnDelay) * time.Second)
+			timer.Reset(time.Duration(RegistryConnDelay) * time.Second)
+			continue
+		}
 		for {
+
 			serviceEvent, err := listener.Next()
+
 			if err != nil {
 				logger.Warnf("Selector.watch() = error{%v}", perrors.WithStack(err))
 				listener.Close()
@@ -172,6 +186,7 @@ func (pr *polarisRegistry) Subscribe(url *common.URL, notifyListener registry.No
 			}
 			logger.Infof("update begin, service event: %v", serviceEvent.String())
 			notifyListener.Notify(serviceEvent)
+			watcher.startWatch()
 		}
 	}
 }