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
15package rafthttp
16
17import (
18	"github.com/coreos/etcd/pkg/types"
19	"github.com/coreos/etcd/raft/raftpb"
20)
21
22type remote struct {
23	id       types.ID
24	status   *peerStatus
25	pipeline *pipeline
26}
27
28func 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
48func (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
60func (g *remote) stop() {
61	g.pipeline.stop()
62}
63
64func (g *remote) Pause() {
65	g.stop()
66}
67
68func (g *remote) Resume() {
69	g.pipeline.start()
70}
71