dubbo.apache.org/dubbo-go/v3@v3.1.1/remoting/etcdv3/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 etcdv3
    19  
    20  import (
    21  	"sync"
    22  	"time"
    23  )
    24  
    25  import (
    26  	gxetcd "github.com/dubbogo/gost/database/kv/etcd/v3"
    27  	"github.com/dubbogo/gost/log/logger"
    28  )
    29  
    30  import (
    31  	"dubbo.apache.org/dubbo-go/v3/common"
    32  )
    33  
    34  type clientFacade interface {
    35  	Client() *gxetcd.Client
    36  	SetClient(client *gxetcd.Client)
    37  	ClientLock() *sync.Mutex
    38  	WaitGroup() *sync.WaitGroup // for wait group control, etcd client listener & etcd client container
    39  	Done() chan struct{}        // for etcd client control
    40  	RestartCallBack() bool
    41  	common.Node
    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 clientFacade) {
    47  	defer r.WaitGroup().Done()
    48  	for {
    49  		select {
    50  		case <-r.Client().GetCtx().Done():
    51  			r.RestartCallBack()
    52  			// re-register all services
    53  			time.Sleep(10 * time.Microsecond)
    54  		case <-r.Done():
    55  			logger.Warnf("(ETCDV3ProviderRegistry)reconnectETCDV3 goroutine exit now...")
    56  			return
    57  		}
    58  	}
    59  }