net.engio.mbassy.bus.common

Interface PubSubSupport<T>

All Superinterfaces:

RuntimeProvider

All Known Subinterfaces:

GenericMessagePublicationSupport<T,P>, IMessageBus<T,P>, ISyncMessageBus<T,P>

All Known Implementing Classes:

AbstractPubSubSupport, AbstractSyncAsyncMessageBus, MBassador, SyncMessageBus

public interface PubSubSupport<T>
extends RuntimeProvider

This interface defines the very basic message publication semantics according to the publish subscribe pattern. Listeners can be subscribed and unsubscribed using the corresponding methods. When a listener is subscribed its handlers will be registered and start to receive matching message publications.

Method Summary

Modifier and Type	Method and Description
IMessagePublication	publish(T message) Synchronously publish a message to all registered listeners.
void	subscribe(Object listener) Subscribe all handlers of the given listener.
boolean	unsubscribe(Object listener) Immediately remove all registered message handlers (if any) of the given listener.

Methods inherited from interface net.engio.mbassy.bus.common.RuntimeProvider

getRuntime

Method Detail

subscribe

void subscribe(Object listener)

Subscribe all handlers of the given listener. Any listener is only subscribed once -> subsequent subscriptions of an already subscribed listener will be silently ignored

Parameters:

listener -

unsubscribe

boolean unsubscribe(Object listener)

Immediately remove all registered message handlers (if any) of the given listener. When this call returns all handlers have effectively been removed and will not receive any messages (provided that running publications (iterators) in other threads have not yet obtained a reference to the listener)

A call to this method passing any object that is not subscribed will not have any effect and is silently ignored.

Parameters:

listener -

Returns:

true, if the listener was found and successfully removed false otherwise

publish

IMessagePublication publish(T message)

Synchronously publish a message to all registered listeners. This includes listeners defined for super types of the given message type, provided they are not configured to reject valid subtype. The call returns when all matching handlers of all registered listeners have been notified (invoked) of the message.

Parameters:

message -