ch.bind.philib.msg.vm

Class PubSubVM

java.lang.Object

ch.bind.philib.msg.vm.PubSubVM

All Implemented Interfaces:

PubSub

public final class PubSubVM
extends Object
implements PubSub

Constructor Summary

Constructors

Constructor and Description
PubSubVM(ExecutorService executorService) Creates a DefaultTinyPubSub which publishes messages through the provided ExecutorService.

Method Summary

Methods

Modifier and Type	Method and Description
Map<String,Integer>	activeChannels() Lists all channels with one or more subscriptions. The returned Map is a representation of the state at the time of the invocation of this method.
void	publish(String channelName, Object message) Asynchronously published a message to all subscribers of a channel.
Subscription	subscribe(String channelName, MessageHandler handler) subscribe a MessageHandler to a channel.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

PubSubVM

public PubSubVM(ExecutorService executorService)

Creates a DefaultTinyPubSub which publishes messages through the provided ExecutorService.

Method Detail

subscribe

public Subscription subscribe(String channelName,
                     MessageHandler handler)

Description copied from interface: PubSub

subscribe a MessageHandler to a channel.

Specified by:

subscribe in interface PubSub

handler - a non-null handler

Returns:

an Subscription object if this is a new message handler, null otherwise.

publish

public void publish(String channelName,
           Object message)

Description copied from interface: PubSub

Asynchronously published a message to all subscribers of a channel.

Specified by:

publish in interface PubSub

message - the non-null message to be sent

activeChannels

public Map<String,Integer> activeChannels()

Description copied from interface: PubSub

Lists all channels with one or more subscriptions.
The returned Map is a representation of the state at the time of the invocation of this method. New subscriptions or cancelled subscriptions which happen after the invocation of this method will not be reflected in maps of previous queries.

Specified by:

activeChannels in interface PubSub

Returns:

a Map with active channel names as key and the number of subscribers as value.