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ActiveMQ example source code file (ActiveMQConfiguration.java)

This example ActiveMQ source code file (ActiveMQConfiguration.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

activemqconfiguration, activemqconnectionfactory, class, classloader, classnotfoundexception, classnotfoundexception, connectionfactory, connectionfactory, jmstransactionmanager, platformtransactionmanager, platformtransactionmanager, reflection, singleconnectionfactory, string, string

The ActiveMQ ActiveMQConfiguration.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.component;

import java.lang.reflect.Constructor;

import javax.jms.ConnectionFactory;

import org.apache.activemq.Service;
import org.apache.activemq.spring.ActiveMQConnectionFactory;
import org.apache.camel.component.jms.JmsConfiguration;
import org.springframework.jms.connection.SingleConnectionFactory;
import org.springframework.jms.connection.JmsTransactionManager;
import org.springframework.jms.core.JmsTemplate;
import org.springframework.transaction.PlatformTransactionManager;

/**
 * 
 */
public class ActiveMQConfiguration extends JmsConfiguration {
    private String brokerURL = ActiveMQConnectionFactory.DEFAULT_BROKER_URL;
    private boolean useSingleConnection = false;
    private boolean usePooledConnection = true;
    private String userName;
    private String password;
    private ActiveMQComponent activeMQComponent;

    public ActiveMQConfiguration() {
    }

    public String getBrokerURL() {
        return brokerURL;
    }

    /**
     * Sets the broker URL to use to connect to ActiveMQ using the
     * <a href="http://activemq.apache.org/configuring-transports.html">ActiveMQ URI format
     *
     * @param brokerURL the URL of the broker.
     */
    public void setBrokerURL(String brokerURL) {
        this.brokerURL = brokerURL;
    }

    public boolean isUseSingleConnection() {
        return useSingleConnection;
    }

    public String getUserName() {
        return userName;
    }

    /**
     * Sets the username to be used to login to ActiveMQ
     * @param userName
     */
    public void setUserName(String userName) {
        this.userName = userName;
    }

    public String getPassword() {
        return password;
    }

    /**
     * Sets the password/passcode used to login to ActiveMQ
     *
     * @param password
     */
    public void setPassword(String password) {
        this.password = password;
    }

    /**
     * Enables or disables whether a Spring {@link SingleConnectionFactory} will be used so that when
     * messages are sent to ActiveMQ from outside of a message consuming thread, pooling will be used rather
     * than the default with the Spring {@link JmsTemplate} which will create a new connection, session, producer
     * for each message then close them all down again.
     * <p/>
     * The default value is true so that a single connection is used by default.
     *
     * @param useSingleConnection
     */
    public void setUseSingleConnection(boolean useSingleConnection) {
        this.useSingleConnection = useSingleConnection;
    }

    public boolean isUsePooledConnection() {
        return usePooledConnection;
    }

    /**
     * Enables or disables whether a PooledConnectionFactory will be used so that when
     * messages are sent to ActiveMQ from outside of a message consuming thread, pooling will be used rather
     * than the default with the Spring {@link JmsTemplate} which will create a new connection, session, producer
     * for each message then close them all down again.
     * <p/>
     * The default value is false by default as it requires an extra dependency on commons-pool.
     */
    public void setUsePooledConnection(boolean usePooledConnection) {
        this.usePooledConnection = usePooledConnection;
    }

    @Override
    public PlatformTransactionManager getTransactionManager() {
        PlatformTransactionManager answer = super.getTransactionManager();
        if (isTransacted() && answer == null) {
            // lets auto-default the transaction manager if its not specified
            answer = createTransactionManager();
            setTransactionManager(answer);
            answer = getTransactionManager();
        }
        return answer;
    }

    /**
     * Factory method to create a default transaction manager if one is not specified
     */
    protected PlatformTransactionManager createTransactionManager() {
        JmsTransactionManager answer = new JmsTransactionManager(getConnectionFactory());
        answer.afterPropertiesSet();
        return answer;
    }

    protected void setActiveMQComponent(ActiveMQComponent activeMQComponent) {
        this.activeMQComponent = activeMQComponent;
    }

    @Override
    protected ConnectionFactory createConnectionFactory() {
        ActiveMQConnectionFactory answer = new ActiveMQConnectionFactory();
        if (userName != null) {
            answer.setUserName(userName);
        }
        if (password != null) {
            answer.setPassword(password);
        }
        if (answer.getBeanName() == null) {
            answer.setBeanName("Camel");
        }
        answer.setBrokerURL(getBrokerURL());
        if (isUseSingleConnection()) {
            SingleConnectionFactory scf = new SingleConnectionFactory(answer);
            if (activeMQComponent != null) {
                activeMQComponent.addSingleConnectionFactory(scf);
            }
            return scf;
        }
        else if (isUsePooledConnection()) {
            ConnectionFactory pcf = createPooledConnectionFactory(answer);
            if (activeMQComponent != null) {
                activeMQComponent.addPooledConnectionFactoryService((Service) pcf);
            }
            return pcf;
        }
        else {
            return answer;
        }
    }

    protected ConnectionFactory createPooledConnectionFactory(ActiveMQConnectionFactory connectionFactory) {
        // lets not use classes directly to avoid a runtime dependency on commons-pool
        // for folks not using this option
        try {
            Class type = loadClass("org.apache.activemq.pool.PooledConnectionFactory", getClass().getClassLoader());
            Constructor constructor = type.getConstructor(org.apache.activemq.ActiveMQConnectionFactory.class);
            return (ConnectionFactory) constructor.newInstance(connectionFactory);
        }
        catch (Exception e) {
            throw new RuntimeException("Failed to instantiate PooledConnectionFactory: " + e, e);
        }
    }

    public static Class<?> loadClass(String name, ClassLoader loader) throws ClassNotFoundException {
        ClassLoader contextClassLoader = Thread.currentThread().getContextClassLoader();
        if (contextClassLoader != null) {
            try {
                return contextClassLoader.loadClass(name);
            }
            catch (ClassNotFoundException e) {
                try {
                    return loader.loadClass(name);
                }
                catch (ClassNotFoundException e1) {
                    throw e1;
                }
            }
        } else {
            return loader.loadClass(name);
        }
    }
}

Other ActiveMQ examples (source code examples)

Here is a short list of links related to this ActiveMQ ActiveMQConfiguration.java source code file:

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