func()

in remoting/zookeeper/listener.go [132:185]
53 lines of code
15 McCabe index (conditional complexity)

func (l *ZkEventListener) listenServiceNodeEvent(zkPath string, listener ...remoting.DataListener) bool {

	l.pathMapLock.Lock()
	a, ok := l.pathMap[zkPath]
	if !ok || a.Load() > 1 {
		l.pathMapLock.Unlock()
		return false
	}
	a.Inc()
	l.pathMapLock.Unlock()
	defer a.Dec()
	var zkEvent zk.Event
	for {
		keyEventCh, err := l.Client.ExistW(zkPath)
		if err != nil {
			logger.Warnf("existW{key:%s} = error{%v}", zkPath, err)
			return false
		}
		select {
		case zkEvent = <-keyEventCh:
			logger.Warnf("get a zookeeper keyEventCh{type:%s, server:%s, path:%s, state:%d-%s, err:%s}",
				zkEvent.Type.String(), zkEvent.Server, zkEvent.Path, zkEvent.State, gxzookeeper.StateToString(zkEvent.State), zkEvent.Err)
			switch zkEvent.Type {
			case zk.EventNodeDataChanged:
				logger.Warnf("zk.ExistW(key{%s}) = event{EventNodeDataChanged}", zkPath)
				if len(listener) > 0 {
					content, _, err := l.Client.Conn.Get(zkEvent.Path)
					if err != nil {
						logger.Warnf("zk.Conn.Get{key:%s} = error{%v}", zkPath, err)
						return false
					}
					listener[0].DataChange(remoting.Event{Path: zkEvent.Path, Action: remoting.EventTypeUpdate, Content: string(content)})
				}
			case zk.EventNodeCreated:
				logger.Warnf("[ZkEventListener][listenServiceNodeEvent]Get a EventNodeCreated event for path {%s}", zkPath)
				if len(listener) > 0 {
					content, _, err := l.Client.Conn.Get(zkEvent.Path)
					if err != nil {
						logger.Warnf("zk.Conn.Get{key:%s} = error{%v}", zkPath, err)
						return false
					}
					listener[0].DataChange(remoting.Event{Path: zkEvent.Path, Action: remoting.EventTypeAdd, Content: string(content)})
				}
			case zk.EventNotWatching:
				logger.Infof("[ZkEventListener][listenServiceNodeEvent]Get a EventNotWatching event for path {%s}", zkPath)
			case zk.EventNodeDeleted:
				logger.Infof("[ZkEventListener][listenServiceNodeEvent]Get a EventNodeDeleted event for path {%s}", zkPath)
				return true
			}
		case <-l.exit:
			return false
		}
	}
}