Module handler 

Structs

FnHandler

Wraps a closure as a HeartbeatTimeoutHandler, allowing per-component custom behaviour to be defined inline in main.rs without needing a dedicated struct.

FnMissedHandler

Wraps a FnMut(&str) closure as a HeartbeatMissedHandler.

ShutdownOnTimeout

Convenience handler: initiates a graceful container shutdown.

Traits

HeartbeatMissedHandler

Called by the sender on every heartbeat tick where a target has not responded within response_timeout_ms. Fires repeatedly while the target remains silent.

HeartbeatTimeoutHandler

Called by the receiver watchdog when no heartbeat request has arrived within the timeout window.