ActiveMQ和JMS：新手的基本步骤

大家好，请为新手介绍一些关于ActiveMQ和JMS的基本知识。还有配置步骤。

我们将使用多线程创建一个基于控制台的应用程序。所以，为控制台应用程序创建一个java项目

现在按照以下步骤

将javax.jms.jar、activemq-all-5.3.0.jar、log4j-1.2.15.jar添加到项目库中。 （您可以从下载上述所有jar文件

创建一个名为jndi.properties的文件并粘贴以下文本..（Deatils for jndi.properties只需谷歌一下）

---

添加JMSConsumer.java

import javax.jms.*;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

public class JMSConsumer implements Runnable{
    private static final Log LOG = LogFactory.getLog(JMSConsumer.class);

    public void run() {
        Context jndiContext = null;
        ConnectionFactory connectionFactory = null;
        Connection connection = null;
        Session session = null;
        MessageConsumer consumer = null;
        Destination destination = null;
        String sourceName = null;
        final int numMsgs; 
        sourceName= "MyQueue";
        numMsgs = 1;
        LOG.info("Source name is " + sourceName);
        /*
         * Create a JNDI API InitialContext object
         */
        try {
            jndiContext = new InitialContext();
        } catch (NamingException e) {
            LOG.info("Could not create JNDI API context: " + e.toString());
            System.exit(1);
        }

        /*
         * Look up connection factory and destination.
         */
        try {
            connectionFactory = (ConnectionFactory)jndiContext.lookup("queueConnectionFactory");
            destination = (Destination)jndiContext.lookup(sourceName);
        } catch (NamingException e) {
            LOG.info("JNDI API lookup failed: " + e);
            System.exit(1);
        }


        try {
            connection = connectionFactory.createConnection();
            session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE); 
            consumer = session.createConsumer(destination);
            connection.start();
            try {
                Thread.sleep(2000);
            } catch (InterruptedException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            MessageListener listener = new MyQueueMessageListener();
            consumer.setMessageListener(listener ); 
            //Let the thread run for some time so that the Consumer has suffcient time to consume the message
            try {
                Thread.sleep(5000);
            } catch (InterruptedException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        } catch (JMSException e) {
            LOG.info("Exception occurred: " + e);
        } finally {
            if (connection != null) {
                try {
                    connection.close();
                } catch (JMSException e) {
                }
            }
        }
    }

    }

添加JMSProducer.java

import javax.jms.*;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;


public class JMSProducer implements Runnable{
private static final Log LOG = LogFactory.getLog(JMSProducer.class);

public JMSProducer() {
}

//Run method implemented to run this as a thread.
public void run(){
Context jndiContext = null;
ConnectionFactory connectionFactory = null;
Connection connection = null;
Session session = null;
Destination destination = null;
MessageProducer producer = null;
String destinationName = null;
final int numMsgs; 
destinationName = "MyQueue";
numMsgs = 5;
LOG.info("Destination name is " + destinationName);

/*
* Create a JNDI API InitialContext object
*/
try {
    jndiContext = new InitialContext();
} catch (NamingException e) {
    LOG.info("Could not create JNDI API context: " + e.toString());
    System.exit(1);
}

/*
* Look up connection factory and destination.
*/
try {
    connectionFactory = (ConnectionFactory)jndiContext.lookup("queueConnectionFactory");
    destination = (Destination)jndiContext.lookup(destinationName);
} catch (NamingException e) {
    LOG.info("JNDI API lookup failed: " + e);
    System.exit(1);
}

/*
* Create connection. Create session from connection; false means
* session is not transacted.create producer, set the text message, set the co-relation id and send the message.
*/
try {
    connection = connectionFactory.createConnection();
    session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
    producer = session.createProducer(destination);
    TextMessage message = session.createTextMessage();
    for (int i = 0; i

添加SimpleApp.java

public class SimpleApp {

    //Run the producer first, then the consumer
    public static void main(String[] args) throws Exception {
        runInNewthread(new JMSProducer());
        runInNewthread(new JMSConsumer()); 
    }

    public static void runInNewthread(Runnable runnable) {
        Thread brokerThread = new Thread(runnable);
        brokerThread.setDaemon(false);
        brokerThread.start();
    }

}

公共类SimpleApp{ //首先运行生产者，然后运行消费者 公共静态void main（字符串[]args）引发异常{ runInNewthread（新JMSProducer（））； runInNewthread（新JMSConsumer（））； } 公共静态void runInNewthread（Runnable Runnable）{ Thread brokerThread=新线程（可运行）； brokerThread.setDaemon（false）； brokerThread.start（）； } }

---

现在运行SimpleApp.java类

---

这是一个针对ActiveMQ和ApacheCamel的简单junit测试。这两种技术配合得非常好

如果您想了解有关代码的更多详细信息，可以在我的博客中找到一篇文章：

---

反对票：这个问题在很多年前就被问到了，我知道这是一个低质量的问题，但不值得反对票。至少在这里添加你的评论。不要隐藏你自己和反对票从后门。你有没有关于activemq安装的一步一步的指南和例子？@SelvamR No。但是我在下面添加了一个答案，可以帮助你这么做…@PankajKumar嗨，Pankaj，请看一下这个问题。你对此有什么想法吗？谢谢你的时间。嗨，谢谢你的回答。你能帮我解释一下吗？谢谢你的时间。

import java.io.*;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import javax.jms.*;


public class MyQueueMessageListener implements MessageListener {
    private static final Log LOG = LogFactory.getLog(MyQueueMessageListener.class);
    /**
    *
    */
    public MyQueueMessageListener() {
    // TODO Auto-generated constructor stub
    }

    /** (non-Javadoc)
    * @see javax.jms.MessageListener#onMessage(javax.jms.Message)
    * This is called on receving of a text message.
    */
    public void onMessage(Message arg0) {
        LOG.info("onMessage() called!");
        if(arg0 instanceof TextMessage){
            try {
                //Print it out
                System.out.println("Recieved message in listener: " + ((TextMessage)arg0).getText());

                System.out.println("Co-Rel Id: " + ((TextMessage)arg0).getJMSCorrelationID());
                try {
                    //Log it to a file
                    BufferedWriter outFile = new BufferedWriter(new FileWriter("MyQueueConsumer.txt"));
                    outFile.write("Recieved message in listener: " + ((TextMessage)arg0).getText());
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            } catch (JMSException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }else{
            System.out.println("~~~~Listener : Error in message format~~~~");
        }

    }

    }

public class SimpleApp { //Run the producer first, then the consumer public static void main(String[] args) throws Exception { runInNewthread(new JMSProducer()); runInNewthread(new JMSConsumer()); } public static void runInNewthread(Runnable runnable) { Thread brokerThread = new Thread(runnable); brokerThread.setDaemon(false); brokerThread.start(); } }

public class ActiveMQTest extends CamelTestSupport {

    @Override
    protected CamelContext createCamelContext() throws Exception {
        CamelContext camelContext = super.createCamelContext();

        ConnectionFactory connectionFactory = new ActiveMQConnectionFactory("vm://localhost?broker.persistent=false");
        camelContext.addComponent("activemq", jmsComponentClientAcknowledge(connectionFactory));

        return camelContext;
    }

    @Override
    protected RouteBuilder createRouteBuilder() throws Exception {
        return new RouteBuilder() {

            @Override
            public void configure() throws Exception {

            from("mina:tcp://localhost:6666?textline=true&sync=false")
             .to("activemq:processHL7");

            from("activemq:processHL7")
              .to("mock:end");
            }
        };
    }

    @Test
    public void testSendHL7Message() throws Exception {
        MockEndpoint mock = getMockEndpoint("mock:end");

        String m = "MSH|^~\\&|hl7Integration|hl7Integration|||||ADT^A01|||2.5|\r" +
                "EVN|A01|20130617154644\r" +
                "PID|1|465 306 5961||407623|Wood^Patrick^^^MR||19700101|1|\r" +
                "PV1|1||Location||||||||||||||||261938_6_201306171546|||||||||||||||||||||||||20130617134644|";

        mock.expectedBodiesReceived(m);

        template.sendBody("mina:tcp://localhost:6666?textline=true&sync=false", m);

        mock.assertIsSatisfied();
    }