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
use election::Term;
use log::{LogIndex, LogPosition, LogPrefix, LogSuffix};
use node::NodeId;
#[derive(Debug, Clone)]
#[allow(missing_docs)]
pub enum Message {
RequestVoteCall(RequestVoteCall),
RequestVoteReply(RequestVoteReply),
AppendEntriesCall(AppendEntriesCall),
AppendEntriesReply(AppendEntriesReply),
InstallSnapshotCast(InstallSnapshotCast),
}
impl Message {
pub fn header(&self) -> &MessageHeader {
match self {
Message::RequestVoteCall(m) => &m.header,
Message::RequestVoteReply(m) => &m.header,
Message::AppendEntriesCall(m) => &m.header,
Message::AppendEntriesReply(m) => &m.header,
Message::InstallSnapshotCast(m) => &m.header,
}
}
pub(crate) fn set_destination(&mut self, dst: &NodeId) {
match self {
Message::RequestVoteCall(m) => {
m.header.destination = dst.clone();
}
Message::RequestVoteReply(m) => {
m.header.destination = dst.clone();
}
Message::AppendEntriesCall(m) => {
m.header.destination = dst.clone();
}
Message::AppendEntriesReply(m) => {
m.header.destination = dst.clone();
}
Message::InstallSnapshotCast(m) => {
m.header.destination = dst.clone();
}
}
}
}
impl From<RequestVoteCall> for Message {
fn from(f: RequestVoteCall) -> Self {
Message::RequestVoteCall(f)
}
}
impl From<RequestVoteReply> for Message {
fn from(f: RequestVoteReply) -> Self {
Message::RequestVoteReply(f)
}
}
impl From<AppendEntriesCall> for Message {
fn from(f: AppendEntriesCall) -> Self {
Message::AppendEntriesCall(f)
}
}
impl From<AppendEntriesReply> for Message {
fn from(f: AppendEntriesReply) -> Self {
Message::AppendEntriesReply(f)
}
}
impl From<InstallSnapshotCast> for Message {
fn from(f: InstallSnapshotCast) -> Self {
Message::InstallSnapshotCast(f)
}
}
#[derive(Debug, Clone)]
pub struct MessageHeader {
pub sender: NodeId,
pub destination: NodeId,
pub seq_no: SequenceNumber,
pub term: Term,
}
#[derive(Debug, Clone)]
pub struct RequestVoteCall {
pub header: MessageHeader,
pub log_tail: LogPosition,
}
#[derive(Debug, Clone)]
pub struct RequestVoteReply {
pub header: MessageHeader,
pub voted: bool,
}
#[derive(Debug, Clone)]
pub struct AppendEntriesCall {
pub header: MessageHeader,
pub committed_log_tail: LogIndex,
pub suffix: LogSuffix,
}
#[derive(Debug, Clone)]
pub struct AppendEntriesReply {
pub header: MessageHeader,
pub log_tail: LogPosition,
pub busy: bool,
}
#[derive(Debug, Clone)]
pub struct InstallSnapshotCast {
pub header: MessageHeader,
pub prefix: LogPrefix,
}
#[derive(Debug, Default, Clone, Copy, PartialEq, Eq, Hash, PartialOrd, Ord)]
pub struct SequenceNumber(u64);
impl SequenceNumber {
pub fn new(num: u64) -> Self {
SequenceNumber(num)
}
pub fn as_u64(self) -> u64 {
self.0
}
}