openraft 0.10.0-alpha.18

Advanced Raft consensus
Documentation 
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 std::sync::Arc;
use std::time::Duration;

use maplit::btreeset;
use pretty_assertions::assert_eq;

use crate::Membership;
use crate::MembershipState;
use crate::Vote;
use crate::engine::Command;
use crate::engine::Engine;
use crate::engine::testing::UTConfig;
use crate::engine::testing::log_id;
use crate::replication::ReplicationSessionId;
use crate::type_config::TypeConfigExt;
use crate::type_config::alias::EffectiveMembershipOf;
use crate::utime::Leased;
use crate::vote::raft_vote::RaftVoteExt;

fn m01() -> Membership<u64, ()> {
    Membership::<u64, ()>::new_with_defaults(vec![btreeset! {0,1}], [])
}

fn m23() -> Membership<u64, ()> {
    Membership::<u64, ()>::new_with_defaults(vec![btreeset! {2,3}], btreeset! {1,2,3})
}

fn eng() -> Engine<UTConfig> {
    let mut eng = Engine::testing_default(0);
    eng.state.enable_validation(false); // Disable validation for incomplete state

    eng.config.id = 1;
    eng.state.apply_progress_mut().accept(log_id(0, 1, 0));
    eng.state.vote = Leased::new(
        UTConfig::<()>::now(),
        Duration::from_millis(500),
        Vote::new_committed(3, 1),
    );
    eng.state.log_ids.append(log_id(1, 1, 1));
    eng.state.log_ids.append(log_id(2, 1, 3));
    eng.state.membership_state = MembershipState::new(
        Arc::new(EffectiveMembershipOf::<UTConfig>::new(Some(log_id(1, 1, 1)), m01())),
        Arc::new(EffectiveMembershipOf::<UTConfig>::new(Some(log_id(2, 1, 3)), m23())),
    );
    eng.testing_new_leader();
    eng.state.server_state = eng.calc_server_state();

    eng
}

#[test]
fn test_leader_send_heartbeat() -> anyhow::Result<()> {
    let mut eng = eng();
    eng.output.take_commands();

    // A heartbeat is a normal AppendEntries RPC if there are pending data to send.
    {
        eng.try_leader_handler()?.send_heartbeat();
        assert_eq!(
            vec![
                //
                Command::BroadcastHeartbeat {
                    session_id: ReplicationSessionId::new(Vote::new(3, 1).into_committed(), Some(log_id(2, 1, 3))),
                },
            ],
            eng.output.take_commands()
        );
    }

    // Heartbeat will be resent
    {
        eng.output.clear_commands();
        eng.try_leader_handler()?.send_heartbeat();
        assert_eq!(
            vec![
                //
                Command::BroadcastHeartbeat {
                    session_id: ReplicationSessionId::new(Vote::new(3, 1).into_committed(), Some(log_id(2, 1, 3))),
                },
            ],
            eng.output.take_commands()
        );
    }

    Ok(())
}