QueueRouteBuilder.java

// Copyright 2014-2015 Boundary, Inc.
//
// 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 com.boundary.sdk.event;

import javax.jms.ConnectionFactory;

import org.apache.activemq.ActiveMQConnectionFactory;
import org.apache.camel.CamelContext;
import org.apache.camel.component.jms.JmsComponent;


/**
 * Builds are route that is Queue using ActiveMQ
 * 
 * @author davidg
 *
 */
public class QueueRouteBuilder extends BoundaryRouteBuilder {
	
	private String queueName;

	private int concurrentConsumers;

	private boolean asyncConsumer;

	private String jmsUri;
	
	private static final String DEFAULT_QUEUE_NAME="pending_events";
	private static final int DEFAULT_CONCURRENT_CONSUMERS=1;

	public QueueRouteBuilder() {
		queueName = DEFAULT_QUEUE_NAME;
		concurrentConsumers = DEFAULT_CONCURRENT_CONSUMERS;
		asyncConsumer = true;
		jmsUri = "vm://localhost";
	}
	
	/**
	 * Sets the name of JMS queue
	 * 
	 * @param queueName Name of the queue
	 */
	public void setQueueName(String queueName) {
		this.queueName = queueName;
	}
	
	/**
	 * Gets the name of the JMS queue
	 * 
	 * @return Name of the JMS queue
	 */
	public String getQueueName() {
		return this.queueName;
	}
	
	/**
	 * Sets the number of concurrent consumers use by ActiveMQ
	 * @param consumers Number of consumers
	 */
	public void setConcurrentConsumers(int consumers) {
		this.concurrentConsumers = consumers;
	}

	/**
	 * Sets the queue consumers to be asynchronous
	 * @param async true or false
	 */
	public void setAsyncConsumer(boolean async) {
			this.asyncConsumer = async;
	}
	
	/**
	 * 
	 * @param uri URI to the java message server
	 */
	public void setJmsUri(String uri) {
		this.jmsUri = uri;
	}

    @Override
    public void configure() {
    	
    	CamelContext  context = getContext();
    	// connect to embedded ActiveMQ JMS broker
        ConnectionFactory connectionFactory =
            new ActiveMQConnectionFactory(this.jmsUri);
        context.addComponent("jms",JmsComponent.jmsComponentAutoAcknowledge(connectionFactory));
        String jmsUri = String.format("jms:%s?asyncConsumer=%s",queueName,asyncConsumer);

        /**
         * Receives serialized @{link RawEvent} messages
         */
        from(fromUri)
        .startupOrder(startUpOrder)
        .routeId(routeId)
        .to(jmsUri)
		.to("log:com.boundary.sdk.QueueRouteBuilder?level=DEBUG&showHeaders=true&multiline=true")
        .to(toUri)
        ;
    }    
}