org.codeartisans.java.sos.messagebus.MultiThreadDeliveryMessageBus Maven / Gradle / Ivy
/*
* Copyright (c) 2009, Paul Merlin. All Rights Reserved.
* Copyright (c) 2010, Fabien Barbero. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package org.codeartisans.java.sos.messagebus;
import com.google.inject.Inject;
import org.codeartisans.java.sos.threading.WorkQueue;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* MessageBus Implementation that use a thread to iterate over Subscribers and a thread per Message delivery.
* The publish method returns immediatly.
*/
public final class MultiThreadDeliveryMessageBus
extends BaseMessageBus
{
private static final Logger LOGGER = LoggerFactory.getLogger( MultiThreadDeliveryMessageBus.class );
private final WorkQueue workQueue;
@Inject
public MultiThreadDeliveryMessageBus( WorkQueue workQueue )
{
this.workQueue = workQueue;
}
@Override
public void publish( final Message message )
{
workQueue.enqueue( new Runnable()
{
@Override
public void run()
{
if ( !vetoed( message ) ) {
if(LOGGER.isTraceEnabled()) {
LOGGER.trace( "Publishing message {}", message.getClass().getSimpleName() );
}
for ( final S eachSubscriber : subscribers( message.getMessageType() ) ) {
workQueue.enqueue( new Runnable()
{
@Override
public void run()
{
try {
message.deliver( eachSubscriber );
} catch ( DeliveryRefusalException refusal ) {
}
}
} );
}
if(LOGGER.isTraceEnabled()) {
LOGGER.trace( "Message published {}", message.getClass().getSimpleName() );
}
}
}
} );
}
}