Question

您好我创建了以下类来从jibco jms队列中读取消息。在另一个类中，我创建了这个类的一个实例，并尝试将getMessage（）放入一个搅拌器中。我在队列中放了一条消息，我的应用程序因为调用getMessage（）方法而卡住......有什么想法吗？或者我可以在课堂上添加一些改进？

public class EMSReceiver {

    private QueueConnection connection;
    private QueueReceiver queueReceiver;
    private Queue queue;

    private TextMessage message;

    public EMSReceiver(String initialContextFactory, String userName, String password, String serverUrl, String confact, String q){
        try {

            Properties env = new Properties();
            env.put(Context.INITIAL_CONTEXT_FACTORY, initialContextFactory);
            env.put(Context.SECURITY_PRINCIPAL, userName);
            env.put(Context.SECURITY_CREDENTIALS, password);
            env.put(Context.PROVIDER_URL, serverUrl);

            InitialContext jndi = new InitialContext(env);

            QueueConnectionFactory connectionFactory = (QueueConnectionFactory) jndi.lookup(confact);
            QueueConnection connection = connectionFactory.createQueueConnection(userName, password);
            QueueSession session = connection.createQueueSession(false, Session.AUTO_ACKNOWLEDGE);
            this.queue = (Queue) jndi.lookup(q);
            this.queueReceiver = session.createReceiver(queue);

            connection.start();

        }
        catch (JMSException e) {
            e.printStackTrace();
            System.exit(0);
        } catch (NamingException e) {
            e.printStackTrace();
        }
    }

    public String getMessage() throws JMSException{

        try {
            this.message = (TextMessage) queueReceiver.receive();
        } catch (JMSException e) {
            System.out.println("Could not retrieve the message.");
            e.printStackTrace();
        }
        return message.getText();

    }

Answer 1

queueReceiver.receive()方法将等待，直到它在队列中收到消息。如果您不想等，请使用receiveNoWait()或receive(long timeout)。可以在此处找到相关文档：https://javaee-spec.java.net/nonav/javadocs/javax/jms/QueueReceiver.html。

TIBCO JMS队列消息接收器卡住了

1 个答案: