/**
* Registers an event listener.
*
* <p>The registered {@link Consumer} will be {@link Consumer#accept(Object) called} when an event
* is received from the Raft cluster for the session. {@link Session} implementations must
* guarantee that consumers are always called in the same thread for the session. Therefore, no
* two events will be received concurrently by the session. Additionally, events are guaranteed to
* be received in the order in which they were sent by the state machine.
*
* @param event The event to which to listen.
* @param callback The session receive callback.
* @param <T> The session event type.
* @return The listener context.
* @throws NullPointerException if {@code event} or {@code callback} is null
*/
public <T> Listener<T> onEvent(String event, Consumer<T> callback) {
return listener.onEvent(event, callback);
}
/**
* Registers a void event listener.
*
* <p>The registered {@link Runnable} will be {@link Runnable#run() called} when an event is
* received from the Raft cluster for the session. {@link Session} implementations must guarantee
* that consumers are always called in the same thread for the session. Therefore, no two events
* will be received concurrently by the session. Additionally, events are guaranteed to be
* received in the order in which they were sent by the state machine.
*
* @param event The event to which to listen.
* @param callback The session receive callback.
* @return The listener context.
* @throws NullPointerException if {@code event} or {@code callback} is null
*/
public Listener<Void> onEvent(String event, Runnable callback) {
return listener.onEvent(event, callback);
}
