ActiveMQ(六) 转

 

package pfs.y2017.m11.mq.activemq.demo07;

import org.apache.activemq.ActiveMQConnectionFactory;

import javax.jms.*;
import java.util.Random;

public class Client implements MessageListener {
    private static int ackMode;
    private static String clientQueueName;

    private boolean transacted = false;
    private MessageProducer producer;

    static {
        clientQueueName = "client.messages";
        ackMode = Session.AUTO_ACKNOWLEDGE;
    }

    public Client() {
        ActiveMQConnectionFactory connectionFactory = new ActiveMQConnectionFactory("tcp://localhost:61616");
        Connection connection;
        try {
            connection = connectionFactory.createConnection();
            connection.start();
            Session session = connection.createSession(transacted, ackMode);
            Destination adminQueue = session.createQueue(clientQueueName);

            // Setup a message producer to send message to the queue the server is consuming
            // from
            this.producer = session.createProducer(adminQueue);
            this.producer.setDeliveryMode(DeliveryMode.NON_PERSISTENT);

            // Create a temporary queue that this client will listen for responses on then
            // create a consumer
            // that consumes message from this temporary queue...for a real application a
            // client should reuse
            // the same temp queue for each message to the server...one temp queue per
            // client
            Destination tempDest = session.createTemporaryQueue();
            MessageConsumer responseConsumer = session.createConsumer(tempDest);

            // This class will handle the messages to the temp queue as well
            responseConsumer.setMessageListener(this);

            // Now create the actual message you want to send
            TextMessage txtMessage = session.createTextMessage();
            // 设置信息
            txtMessage.setText("MyProtocolMessage");

            // Set the reply to field to the temp queue you created above, this is the queue
            // the server
            // will respond to
            txtMessage.setJMSReplyTo(tempDest);

            // Set a correlation ID so when you get a response you know which sent message
            // the response is for
            // If there is never more than one outstanding message to the server then the
            // same correlation ID can be used for all the messages...if there is more than
            // one outstanding
            // message to the server you would presumably want to associate the correlation
            // ID with this
            // message somehow...a Map works good
            String correlationId = this.createRandomString();
            txtMessage.setJMSCorrelationID(correlationId);
            this.producer.send(txtMessage);
        } catch (JMSException e) {
            // Handle the exception appropriately
        }
    }

    private String createRandomString() {
        Random random = new Random(System.currentTimeMillis());
        long randomLong = random.nextLong();
        return Long.toHexString(randomLong);
    }

    public void onMessage(Message message) {
        String messageText = null;
        try {
            if (message instanceof TextMessage) {
                TextMessage textMessage = (TextMessage) message;
                messageText = textMessage.getText();
                System.out.println("响应内容 = " + messageText);
            }
        } catch (JMSException e) {
            // Handle the exception appropriately
        }
    }

    public static void main(String[] args) {
        new Client();
    }
}

 

 

package pfs.y2017.m11.mq.activemq.demo07;

public class MessageProtocol {
    public String handleProtocolMessage(String messageText) {
        String responseText;
        // 判断是否是client传过来的信息，在这里就可以做些解析
        if ("MyProtocolMessage".equalsIgnoreCase(messageText)) {
            responseText = "我收到了信息";
        } else {
            responseText = "我不知道你传的是什么: " + messageText;
        }

        return responseText;
    }
}

 

 

package pfs.y2017.m11.mq.activemq.demo07;

import org.apache.activemq.broker.BrokerService;
import org.apache.activemq.ActiveMQConnectionFactory;

import javax.jms.*;

public class Server implements MessageListener {
    private static int ackMode;
    private static String messageQueueName;
    private static String messageBrokerUrl;

    private Session session;
    private boolean transacted = false;
    private MessageProducer replyProducer;
    private MessageProtocol messageProtocol;

    static {
        messageBrokerUrl = "tcp://localhost:61616";
        messageQueueName = "client.messages";
        ackMode = Session.AUTO_ACKNOWLEDGE;
    }

    public Server() {
        try {
            // This message broker is embedded
            BrokerService broker = new BrokerService();
            broker.setPersistent(false);
            broker.setUseJmx(false);
            broker.addConnector(messageBrokerUrl);
            broker.start();
        } catch (Exception e) {
            // Handle the exception appropriately
        }

        // Delegating the handling of messages to another class, instantiate it before
        // setting up JMS so it
        // is ready to handle messages
        this.messageProtocol = new MessageProtocol();
        this.setupMessageQueueConsumer();
    }

    private void setupMessageQueueConsumer() {
        ActiveMQConnectionFactory connectionFactory = new ActiveMQConnectionFactory(messageBrokerUrl);
        Connection connection;
        try {
            connection = connectionFactory.createConnection();
            connection.start();
            this.session = connection.createSession(this.transacted, ackMode);
            Destination adminQueue = this.session.createQueue(messageQueueName);

            // Setup a message producer to respond to messages from clients, we will get the
            // destination
            // to send to from the JMSReplyTo header field from a Message
            this.replyProducer = this.session.createProducer(null);
            this.replyProducer.setDeliveryMode(DeliveryMode.NON_PERSISTENT);

            // Set up a consumer to consume messages off of the admin queue
            MessageConsumer consumer = this.session.createConsumer(adminQueue);
            consumer.setMessageListener(this);
        } catch (JMSException e) {
            // Handle the exception appropriately
        }
    }

    public void onMessage(Message message) {
        try {
            TextMessage response = this.session.createTextMessage();
            if (message instanceof TextMessage) {
                TextMessage txtMsg = (TextMessage) message;
                String messageText = txtMsg.getText();
                response.setText(this.messageProtocol.handleProtocolMessage(messageText));
            }

            // Set the correlation ID from the received message to be the correlation id of
            // the response message
            // this lets the client identify which message this is a response to if it has
            // more than
            // one outstanding message to the server
            response.setJMSCorrelationID(message.getJMSCorrelationID());

            // Send the response to the Destination specified by the JMSReplyTo field of the
            // received message,
            // this is presumably a temporary queue created by the client
            this.replyProducer.send(message.getJMSReplyTo(), response);
        } catch (JMSException e) {
            // Handle the exception appropriately
        }
    }

    public static void main(String[] args) {
        new Server();
    }
}