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feat(raft-library): task 3.5 — election timeout, leader-lost, check-and-start; 6 tests

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This commit is contained in:
Rongsong Shen 2026-05-31 06:02:29 +00:00
parent f81054930f
commit 85a7e325a8
3 changed files with 262 additions and 6 deletions
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33
src/lib/raft/raft.c
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@ -224,16 +224,41 @@ int raft_on_vote_reply(raft_state_t *s, int from_idx, int granted, uint64_t term
void raft_on_election_timeout(raft_state_t *s)
{
(void)s;
if (s->election_decided) {
s->cbs->on_cancel_timeout(s->ctx);
if (s->cbs->on_trace)
s->cbs->on_trace(s->ctx, "election_timeout_noop", NULL);
return;
}
s->role = RAFT_FOLLOWER;
s->election_decided = 1;
s->cbs->on_become_follower(s->ctx, s->term, -1);
s->cbs->on_cancel_timeout(s->ctx);
if (s->cbs->on_trace)
s->cbs->on_trace(s->ctx, "election_timeout", NULL);
}
void raft_on_leader_lost(raft_state_t *s)
{
(void)s;
s->voted_for = -1;
s->role = RAFT_FOLLOWER;
s->cbs->on_start_election_after_delay(s->ctx,
(uint32_t)s->my_priority * s->election_timeout_ms);
if (s->cbs->on_trace)
s->cbs->on_trace(s->ctx, "leader_lost", NULL);
}
int raft_check_and_start_election(raft_state_t *s)
{
(void)s;
return 0;
if (s->voted_for != -1 && s->voted_for != s->self_idx) {
if (s->cbs->on_trace)
s->cbs->on_trace(s->ctx, "jitter_skip", NULL);
return RAFT_SKIP_ELECTION;
}
/* Precondition: raft_on_leader_lost sets role=FOLLOWER, so -EALREADY is unreachable here */
int rc = raft_start_election(s);
(void)rc;
return RAFT_ELECTION_STARTED;
}