ActiveMQ發消息、收消息、持久化，查詢隊列剩餘消息數、出隊數的實現

時間 2019-11-06

原文原文鏈接

初次發博文，勿噴~~java

最近老大讓我使用ActiveMQ實現這麼個東東：1.查詢消息隊列中還有多少任務沒有執行；2.消息隊列的持久化；服務器

真是愁殺我也，之前沒見過啊，因而又看文檔，又百度又google的，最終仍是在一天半以後整出來鳥~~session

首先向你們介紹一本書籍《ActiveMQ in Action》，我大部分代碼都是參考這本書實現的。好了，廢話少說，看代碼：tcp

1.首先啓動activeMQ的服務ide

public class RunServer {

    /** 啓動activeMQ服務 */
    public static void main(String[] args) throws Exception {
        RunServer rs = new RunServer();       
        BrokerService broker = rs.startServer();
    }
   
    public BrokerService startServer() throws Exception{
        // java代碼調用activemq相關的類來構造並啓動brokerService
        BrokerService broker = new BrokerService();

        // 如下是持久化的配置
        // 持久化文件存儲位置
        File dataFilterDir = new File("targer/amq-in-action/kahadb");
        KahaDBStore kaha = new KahaDBStore();
        kaha.setDirectory(dataFilterDir);
        // use a bigger journal file
        kaha.setJournalMaxFileLength(1024*100);
        // small batch means more frequent and smaller writes
        kaha.setIndexWriteBatchSize(100);
        // do the index write in a separate thread
        kaha.setEnableIndexWriteAsync(true);
       
        broker.setPersistenceAdapter(kaha);
        // create a transport connector
        broker.addConnector("tcp://localhost:61616");
        broker.setUseJmx(true);
        //broker.setDataDirectory("data/");
       

        // 如下是ManagementContext的配置，從這個容器中能夠取得消息隊列中未執行的消息數、消費者數、出隊數等等
        // 設置ManagementContext
        ManagementContext context = broker.getManagementContext();
        context.setConnectorPort(2011);
        context.setJmxDomainName("my-broker");
        context.setConnectorPath("/jmxrmi");
        broker.start();
        System.in.read();
        return broker;
    }

2.發送消息google

public class Sender {
    private static final int SEND_NUMBER = 1;

    public static void main(String[] args) {
        // ConnectionFactory ：鏈接工廠，JMS 用它建立鏈接
        ConnectionFactory connectionFactory;
        // Connection ：JMS 客戶端到JMS Provider 的鏈接
        Connection connection = null;
        // Session： 一個發送或接收消息的線程
        Session session;
        // Destination ：消息的目的地;消息發送給誰.
        Destination destination;
        // MessageProducer：消息發送者
        MessageProducer producer;
        // TextMessage message;
        // 構造ConnectionFactory實例對象，此處採用ActiveMq的實現jar

        connectionFactory = new ActiveMQConnectionFactory(
                ActiveMQConnection.DEFAULT_USER,
                ActiveMQConnection.DEFAULT_PASSWORD,
                "tcp://localhost:61616");
        try {
            // 構造從工廠獲得鏈接對象
            connection = connectionFactory.createConnection();
            // 啓動
            connection.start();
            // 獲取操做鏈接
            session = connection.createSession(Boolean.TRUE,
                    Session.AUTO_ACKNOWLEDGE);
            // 獲取session注意參數值xingbo.xu-queue是一個服務器的queue，須在在ActiveMq的console配置
            destination = session.createQueue("test-persistence");
            // 獲得消息生成者【發送者】
            producer = session.createProducer(destination);
            // 設置不持久化，能夠更改
            producer.setDeliveryMode(DeliveryMode.PERSISTENT);
            // 構造消息
            sendMessage(session, producer);
            session.commit();

        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                if (null != connection)
                    connection.close();
            } catch (Throwable ignore) {
            }
        }

    }

    public static void sendMessage(Session session, MessageProducer producer)
            throws Exception {
        for (int i = 1; i <= SEND_NUMBER; i++) {
            TextMessage message = session
                    .createTextMessage("ActiveMq 發送的消息" + i);
            // 發送消息到目的地方
            System.out.println("發送消息:" + i);
            producer.send(message);
        }
    }

3.收消息url

public class Receiver {
    public static void main(String[] args) {
        // ConnectionFactory ：鏈接工廠，JMS 用它建立鏈接
        ConnectionFactory connectionFactory;
        // Connection ：JMS 客戶端到JMS Provider 的鏈接
        Connection connection = null;
        // Session： 一個發送或接收消息的線程
        Session session;
        // Destination ：消息的目的地;消息發送給誰.
        Destination destination;
        // 消費者，消息接收者
        MessageConsumer consumer;

        connectionFactory = new ActiveMQConnectionFactory(
                ActiveMQConnection.DEFAULT_USER,
                ActiveMQConnection.DEFAULT_PASSWORD, "tcp://localhost:61616");
        try {
            // 構造從工廠獲得鏈接對象
            connection = connectionFactory.createConnection();
            // 啓動
            connection.start();
            // 獲取操做鏈接
            session = connection.createSession(Boolean.TRUE,
                    Session.AUTO_ACKNOWLEDGE);
            //test-queue跟sender的保持一致，一個建立一個來接收
            destination = session.createQueue("test-persistence");
            consumer = session.createConsumer(destination);
           
            consumer.setMessageListener(new MessageListener() {
                public void onMessage(Message arg0) {
                    try {
                        Thread.sleep(1000);
                    } catch (InterruptedException e1) {
                        e1.printStackTrace();
                    }
                    System.out.println("==================");
                    try {
                        System.out.println("RECEIVE1第一個得到者:"
                                + ((TextMessage) arg0).getText());
                    } catch (JMSException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }
               
                }
            });
        } catch (Exception e) {
            e.printStackTrace();
        }
        finally {
            try {
                if (null != connection)
                    connection.close();
            } catch (Throwable ignore) {
            }
        }
      }
    }

4.獲取消息的狀態，也就是上面所說的得到消息隊列中未執行的消息數、消費者數、出隊數等等線程

public class StateTest {

    /**
     * 獲取狀態
     * @throws Exception
     */
    public static void main(String[] args) throws Exception {
        JMXServiceURL url = new JMXServiceURL("service:jmx:rmi:///jndi/rmi://localhost:2011/jmxrmi");
        JMXConnector connector = JMXConnectorFactory.connect(url, null);
        connector.connect();
        MBeanServerConnection connection = connector.getMBeanServerConnection();

         // 須要注意的是，這裏的my-broker必須和上面配置的名稱相同
        ObjectName name = new ObjectName("my-broker:BrokerName=localhost,Type=Broker");
        BrokerViewMBean mBean =  (BrokerViewMBean)MBeanServerInvocationHandler.newProxyInstance(connection,                     name, BrokerViewMBean.class, true);
        // System.out.println(mBean.getBrokerName());
        
        for(ObjectName queueName : mBean.getQueues()) {
            QueueViewMBean queueMBean =                     (QueueViewMBean)MBeanServerInvocationHandler.newProxyInstance(connection, queueName, QueueViewMBean.class, true);
            System.out.println("\n------------------------------\n");

            // 消息隊列名稱
            System.out.println("States for queue --- " + queueMBean.getName());

            // 隊列中剩餘的消息數
            System.out.println("Size --- " + queueMBean.getQueueSize());

            // 消費者數
            System.out.println("Number of consumers --- " + queueMBean.getConsumerCount());

            // 出隊數
            System.out.println("Number of dequeue ---" + queueMBean.getDequeueCount() );
        }
        
        }

    }

到此結束，但願能夠爲你們作個參考~~code

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