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ActiveMQ example source code file (CamelDestination.java)

This example ActiveMQ source code file (CamelDestination.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - ActiveMQ tags/keywords

camelconnection, camelcontext, camelcontext, cameldestination, endpoint, endpoint, jmsbinding, jmsexception, no, string, string, this, this, unsupportedoperationexception

The ActiveMQ CamelDestination.java source code

/**
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.apache.activemq.camel;

import javax.jms.JMSException;
import javax.jms.MessageConsumer;
import javax.jms.MessageProducer;
import javax.jms.QueueReceiver;
import javax.jms.QueueSender;
import javax.jms.TopicPublisher;
import javax.jms.TopicSubscriber;

import org.apache.activemq.ActiveMQConnection;
import org.apache.activemq.ActiveMQSession;
import org.apache.activemq.CustomDestination;
import org.apache.camel.CamelContext;
import org.apache.camel.CamelContextAware;
import org.apache.camel.Endpoint;
import org.apache.camel.component.jms.JmsBinding;
import org.apache.camel.component.jms.JmsEndpoint;

/**
 * 
 */
public class CamelDestination implements CustomDestination, CamelContextAware {
    private String uri;
    private Endpoint endpoint;
    private CamelContext camelContext;
    // add in dummy endpoint pending camel release with 
    // https://issues.apache.org/activemq/browse/CAMEL-1982
    private JmsBinding binding = new JmsBinding(new JmsEndpoint());

    public CamelDestination() {
    }

    public CamelDestination(String uri) {
        this.uri = uri;
    }

    public String toString() {
        return uri.toString();
    }

    // CustomDestination interface
    //-----------------------------------------------------------------------
    public MessageConsumer createConsumer(ActiveMQSession session, String messageSelector) {
        return createConsumer(session, messageSelector, false);
    }

    public MessageConsumer createConsumer(ActiveMQSession session, String messageSelector, boolean noLocal) {
        return new CamelMessageConsumer(this, resolveEndpoint(session), session, messageSelector, noLocal);
    }

    public TopicSubscriber createSubscriber(ActiveMQSession session, String messageSelector, boolean noLocal) {
        return createDurableSubscriber(session, null, messageSelector, noLocal);
    }

    public TopicSubscriber createDurableSubscriber(ActiveMQSession session, String name, String messageSelector, boolean noLocal) {
        throw new UnsupportedOperationException("This destination is not a Topic: " + this);
    }

    public QueueReceiver createReceiver(ActiveMQSession session, String messageSelector) {
        throw new UnsupportedOperationException("This destination is not a Queue: " + this);
    }

    // Producers
    //-----------------------------------------------------------------------
    public MessageProducer createProducer(ActiveMQSession session) throws JMSException {
        return new CamelMessageProducer(this, resolveEndpoint(session), session);
    }

    public TopicPublisher createPublisher(ActiveMQSession session) throws JMSException {
        throw new UnsupportedOperationException("This destination is not a Topic: " + this);
    }

    public QueueSender createSender(ActiveMQSession session) throws JMSException {
        throw new UnsupportedOperationException("This destination is not a Queue: " + this);
    }

    // Properties
    //-----------------------------------------------------------------------

    public String getUri() {
        return uri;
    }

    public void setUri(String uri) {
        this.uri = uri;
    }

    public Endpoint getEndpoint() {
        return endpoint;
    }

    public void setEndpoint(Endpoint endpoint) {
        this.endpoint = endpoint;
    }

    public CamelContext getCamelContext() {
        return camelContext;
    }

    public void setCamelContext(CamelContext camelContext) {
        this.camelContext = camelContext;
    }

    public JmsBinding getBinding() {
        return binding;
    }

    public void setBinding(JmsBinding binding) {
        this.binding = binding;
    }

    // Implementation methods
    //-----------------------------------------------------------------------

    /**
     * Resolves the Camel Endpoint for this destination
     *
     * @return
     */
    protected Endpoint resolveEndpoint(ActiveMQSession session) {
        Endpoint answer = getEndpoint();
        if (answer == null) {
            answer = resolveCamelContext(session).getEndpoint(getUri());
            if (answer == null) {
                throw new IllegalArgumentException("No endpoint could be found for URI: " + getUri());
            }
        }
        return answer;
    }

    protected CamelContext resolveCamelContext(ActiveMQSession session) {
        CamelContext answer = getCamelContext();
        if (answer == null) {
            ActiveMQConnection connection = session.getConnection();
            if (connection instanceof CamelConnection) {
                CamelConnection camelConnection = (CamelConnection) connection;
                answer = camelConnection.getCamelContext();
            }
        }
        if (answer == null) {
            throw new IllegalArgumentException("No CamelContext has been configured");
        }
        return answer;
    }
}

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