-
Notifications
You must be signed in to change notification settings - Fork 54
/
RAFT.go
205 lines (168 loc) · 3.86 KB
/
RAFT.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
package domain
import (
"time"
"it-chain/common"
"github.com/pkg/errors"
pb "it-chain/network/protos"
"sync"
)
type RaftState int32
type ElectionMsgType int32
const(
Follower RaftState = iota
Candidate
Leader
ShutDown
)
const (
HeartBeatMsg ElectionMsgType = iota
RequestVoteMsg
VoteMsg
)
type Raft struct {
nodeId string
state RaftState
term int64
voteCount int
votedFor string
ElectionTimer time.Timer
HeartbeatTimer time.Timer
lastBlockHash string
leaderId string
peerIds []string
sync.RWMutex
}
func NewRaft(nodeId string) *Raft{
le := &Raft{
nodeId: nodeId, state: Follower, term: 0, voteCount: 0, votedFor: "", lastBlockHash: "", leaderId: "", peerIds: make([]string, 0),
}
le.ElectionTimer.Stop()
le.HeartbeatTimer.Stop()
return le
}
func (r *Raft) GetNodeId() string {
return r.nodeId
}
func (r *Raft) SetState(state RaftState) {
r.state = state
}
func (r *Raft) GetState() RaftState {
return r.state
}
func (r *Raft) SetTerm(term int64) {
r.term = term
}
func (r *Raft) GetTerm() int64 {
return r.term
}
func (r *Raft) CountTerm() {
r.term++
}
func (r *Raft) GetVoteCount() int {
return r.voteCount
}
func (r *Raft) CountVote() {
r.voteCount++
}
func (r *Raft) Voting(peerId string) {
r.votedFor = peerId
}
func (r *Raft) GetVotedFor() string {
return r.votedFor
}
func (r *Raft) GetLastBlockHash() string {
return r.lastBlockHash
}
func (r *Raft) SetLastBlockHash(hash string) {
r.lastBlockHash = hash
}
func (r *Raft) VoteValidate(candidateRaft *Raft) (bool, error) {
if r.votedFor != ""{
return false, errors.New("already voted")
}
if r.GetLastBlockHash() != candidateRaft.GetLastBlockHash() {
return false, errors.New("lastblockhash is different")
}
return true, nil
}
func (r *Raft) VotesForItself() {
r.votedFor = r.nodeId
r.voteCount++
}
func (r *Raft) SetLeaderId(leaderId string) {
r.leaderId = leaderId
}
func (r *Raft) GetLeaderId() string {
return r.leaderId
}
func (r *Raft) ResetVote() {
r.votedFor = ""
r.voteCount = 0
}
func (r *Raft) ResetElectionTimer() {
r.ElectionTimer.Reset(time.Duration(common.CryptoRandomGeneration(150, 300)) * time.Millisecond)
}
func (r *Raft) SetHeartbeatTimer(t time.Duration) {
r.HeartbeatTimer.Reset(t)
}
func (r *Raft) GetPeerId() []string {
return r.peerIds
}
func (r *Raft) SetPeerId(peerids []string) {
r.peerIds = peerids
}
func (r *Raft) AppendPeerId(peerId string) {
r.peerIds = append(r.peerIds, peerId)
}
type ElectionMessage struct {
LastBlockHash string
SenderID string
MsgType ElectionMsgType
Term int64
PeerIDs []string
}
func FromElectionProtoMessage(electionMessage pb.ElectionMessage) *ElectionMessage{
return &ElectionMessage{
LastBlockHash: electionMessage.LastBlockHash,
SenderID: electionMessage.SenderID,
MsgType: ElectionMsgType(electionMessage.MsgType),
Term: int64(electionMessage.Term),
PeerIDs: electionMessage.PeerIDs,
}
}
func ToElectionProtoMessage(electionMessage ElectionMessage) *pb.ElectionMessage{
return &pb.ElectionMessage{
LastBlockHash: electionMessage.LastBlockHash,
SenderID: electionMessage.SenderID,
MsgType: int32(electionMessage.MsgType),
Term: int64(electionMessage.Term),
PeerIDs: electionMessage.PeerIDs,
}
}
func (r *Raft) StopElectionTimer() {
r.ElectionTimer.Stop()
}
func (r *Raft) StopHeartbeatTimer() {
r.HeartbeatTimer.Stop()
}
func NewElectionMessage(r *Raft) ElectionMessage {
msgType := func() ElectionMsgType {
switch r.GetState() {
case Follower:
return VoteMsg
case Candidate:
return RequestVoteMsg
case Leader:
return HeartBeatMsg
default:
return -1
}
}
return ElectionMessage{
LastBlockHash: r.GetLastBlockHash(),
SenderID: r.GetNodeId(),
MsgType: msgType(),
Term: r.GetTerm(),
PeerIDs: r.peerIds,
}
}