dubbo.apache.org/dubbo-go/v3@v3.1.1/remoting/zookeeper/facade.go (about)

     1  /*
     2   * Licensed to the Apache Software Foundation (ASF) under one or more
     3   * contributor license agreements.  See the NOTICE file distributed with
     4   * this work for additional information regarding copyright ownership.
     5   * The ASF licenses this file to You under the Apache License, Version 2.0
     6   * (the "License"); you may not use this file except in compliance with
     7   * the License.  You may obtain a copy of the License at
     8   *
     9   *     http://www.apache.org/licenses/LICENSE-2.0
    10   *
    11   * Unless required by applicable law or agreed to in writing, software
    12   * distributed under the License is distributed on an "AS IS" BASIS,
    13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    14   * See the License for the specific language governing permissions and
    15   * limitations under the License.
    16   */
    17  
    18  package zookeeper
    19  
    20  import (
    21  	"sync"
    22  	"time"
    23  )
    24  
    25  import (
    26  	gxzookeeper "github.com/dubbogo/gost/database/kv/zk"
    27  	"github.com/dubbogo/gost/log/logger"
    28  )
    29  
    30  import (
    31  	"dubbo.apache.org/dubbo-go/v3/common"
    32  )
    33  
    34  type ZkClientFacade interface {
    35  	ZkClient() *gxzookeeper.ZookeeperClient
    36  	SetZkClient(*gxzookeeper.ZookeeperClient)
    37  	ZkClientLock() *sync.Mutex
    38  	WaitGroup() *sync.WaitGroup // for wait group control, zk client listener & zk client container
    39  	Done() chan struct{}        // for registry destroy
    40  	RestartCallBack() bool
    41  	GetURL() *common.URL
    42  }
    43  
    44  // HandleClientRestart keeps the connection between client and server
    45  // This method should be used only once. You can use handleClientRestart() in package registry.
    46  func HandleClientRestart(r ZkClientFacade) {
    47  	defer r.WaitGroup().Done()
    48  	for {
    49  		select {
    50  		case <-r.ZkClient().Reconnect():
    51  			r.RestartCallBack()
    52  			time.Sleep(10 * time.Microsecond)
    53  		case <-r.Done():
    54  			logger.Warnf("receive registry destroy event, quit client restart handler")
    55  			return
    56  		}
    57  	}
    58  }