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
use crate::error::*;
use async_trait::async_trait;
use std::collections::HashMap;
use std::sync::Arc;
pub type RSL = Arc<Box<dyn Resolver + Sync + Send + 'static>>;
pub type SM = Arc<Box<dyn StateMachine + Sync + Send + 'static>>;
#[async_trait]
pub trait StateMachine {
fn execute(&self, command: &[u8]) -> RaftResult<Vec<u8>>;
fn apply_log(&self, term: u64, index: u64, command: &[u8]) -> RaftResult<()>;
async fn apply_member_change(
&self,
term: u64,
index: u64,
node_id: u64,
action: u8,
exists: bool,
) -> RaftResult<()>;
async fn apply_leader_change(&self, term: u64, index: u64, leader: u64) -> RaftResult<()>;
}
pub trait Resolver {
fn heartbeat_addr(&self, node_id: &u64) -> RaftResult<String>;
fn log_addr(&self, node_id: &u64) -> RaftResult<String>;
}
pub struct DefResolver {
log_addrs: HashMap<u64, String>,
internal_addrs: HashMap<u64, String>,
}
impl Resolver for DefResolver {
fn heartbeat_addr(&self, node_id: &u64) -> RaftResult<String> {
match self.internal_addrs.get(node_id) {
Some(v) => Ok(v.to_string()),
None => Err(RaftError::NotfoundAddr(*node_id)),
}
}
fn log_addr(&self, node_id: &u64) -> RaftResult<String> {
match self.log_addrs.get(node_id) {
Some(v) => Ok(v.to_string()),
None => Err(RaftError::NotfoundAddr(*node_id)),
}
}
}
impl DefResolver {
pub fn new() -> Self {
return DefResolver {
log_addrs: HashMap::new(),
internal_addrs: HashMap::new(),
};
}
pub fn add_node(&mut self, node_id: u64, host: String, heartbeat_port: u16, log_port: u16) {
if let Some(v) = self.log_addrs.remove(&node_id) {
std::mem::forget(v);
}
if let Some(v) = self.internal_addrs.remove(&node_id) {
std::mem::forget(v);
}
self.log_addrs
.insert(node_id, format!("{}:{}", host, log_port));
self.internal_addrs
.insert(node_id, format!("{}:{}", host, heartbeat_port));
}
pub fn remove_node(&mut self, node_id: u64) {
if let Some(v) = self.log_addrs.remove(&node_id) {
std::mem::forget(v);
}
if let Some(v) = self.internal_addrs.remove(&node_id) {
std::mem::forget(v);
}
}
}