Method tick

nodedb-raft/src/node/core.rs:213–238

Drive time-based events: election timeout, heartbeat.

(&mut self)

    /// Drive time-based events: election timeout, heartbeat.
    pub fn tick(&mut self) {
        let now = Instant::now();

        match self.role {
            NodeRole::Follower | NodeRole::Candidate => {
                if now >= self.election_deadline {
                    self.start_election();
                }
            }
            NodeRole::Leader => {
                if now >= self.heartbeat_deadline {
                    self.replicate_to_all();
                    self.heartbeat_deadline = now + self.config.heartbeat_interval;
                }
            }
            NodeRole::Learner => {
                // Learners never run election timeouts. They catch up
                // passively via AppendEntries from the leader.
            }
            NodeRole::Observer => {
                // Observers never run election timeouts. They receive entries
                // from the source leader and apply them locally. Acks are
                // advisory and never gate commit on the source.
            }
        }
    }

    /// Propose a new entry (leader only). Returns the log index.
    pub fn propose(&mut self, data: Vec<u8>) -> Result<u64> {