Trait Election 

pub trait Election: Sync {
    // Required methods
    fn elect(&self) -> bool;
    fn renew(&self) -> bool;
}

Leader election for sequencer redundancy.

In an event-driven architecture, multiple sequencers may exist for redundancy, but only one can publish events to the stream at a time. This trait defines the election mechanism that ensures exclusive leadership.

Semantics:

• Once a sequencer acquires leadership, no other sequencer can claim it.
• Leadership is lease-based with a timeout, allowing failover if the leader becomes unavailable.
• The leader must periodically renew its lease to retain leadership.
• A sequencer that loses leadership should terminate immediately.

Example Backends: Redis, TCP lock server.

Required Methods

fn elect(&self) -> bool

Attempts to acquire leadership.

Returns true if this sequencer successfully became the leader.

fn renew(&self) -> bool

Renews the leadership lease.

Returns true if the lease was successfully renewed.

Implementors