go.etcd.io/etcd@v3.3.27+incompatible/rafthttp/remote.go (about)

     1  // Copyright 2015 The etcd Authors
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package rafthttp
    16  
    17  import (
    18  	"github.com/coreos/etcd/pkg/types"
    19  	"github.com/coreos/etcd/raft/raftpb"
    20  )
    21  
    22  type remote struct {
    23  	id       types.ID
    24  	status   *peerStatus
    25  	pipeline *pipeline
    26  }
    27  
    28  func startRemote(tr *Transport, urls types.URLs, id types.ID) *remote {
    29  	picker := newURLPicker(urls)
    30  	status := newPeerStatus(id)
    31  	pipeline := &pipeline{
    32  		peerID: id,
    33  		tr:     tr,
    34  		picker: picker,
    35  		status: status,
    36  		raft:   tr.Raft,
    37  		errorc: tr.ErrorC,
    38  	}
    39  	pipeline.start()
    40  
    41  	return &remote{
    42  		id:       id,
    43  		status:   status,
    44  		pipeline: pipeline,
    45  	}
    46  }
    47  
    48  func (g *remote) send(m raftpb.Message) {
    49  	select {
    50  	case g.pipeline.msgc <- m:
    51  	default:
    52  		if g.status.isActive() {
    53  			plog.MergeWarningf("dropped internal raft message to %s since sending buffer is full (bad/overloaded network)", g.id)
    54  		}
    55  		plog.Debugf("dropped %s to %s since sending buffer is full", m.Type, g.id)
    56  		sentFailures.WithLabelValues(types.ID(m.To).String()).Inc()
    57  	}
    58  }
    59  
    60  func (g *remote) stop() {
    61  	g.pipeline.stop()
    62  }
    63  
    64  func (g *remote) Pause() {
    65  	g.stop()
    66  }
    67  
    68  func (g *remote) Resume() {
    69  	g.pipeline.start()
    70  }