Question

根据相应的JMS ID选择消息的正确语法是什么？

目前我使用：

String selector = "JMSMessageID='ID:305:1:5:1:1'";
messageConsumer = session.createConsumer(getRetryQueue(), selector);

以上语法适用于使用模拟代理的测试。但是对于ActiveMQ，消息不会被轮询。

原始代码：

@Override
public Message readMessageFromRetryQueueByJmsId(String jmsId) throws QueueingException {
    Connection connection = null;
    Session session = null;
    MessageConsumer messageConsumer = null;
    Message message = null;
    try {
        connection = getConnectionFactory().createConnection();
        session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
        messageConsumer = session.createConsumer(getRetryQueue(), "JMSMessageID='"+jmsId+"'");
        message = messageConsumer.receiveNoWait();
    } catch (JMSException e) {
        throw new QueueingException("Failed to read message from MessageConsumer.");
    } finally {
        try { messageConsumer.close(); } catch (Exception e) { /* NOP */ }
        try { session.close(); } catch (Exception e) { /* NOP */ }
        try { connection.close(); } catch (Exception e) { /* NOP */ }
    }
    return message;
}

Answer 1

由于从未启动过连接，因此未读取消息。

更正后的代码：

@Override
public Message readMessageFromRetryQueueByJmsId(String jmsId) throws QueueingException {
    Connection connection = null;
    Session session = null;
    MessageConsumer messageConsumer = null;
    Message message = null;
    try {
        connection = getConnectionFactory().createConnection();
        session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
        connection.start();
        messageConsumer = session.createConsumer(getRetryQueue(), "JMSMessageID='"+jmsId+"'");
        message = messageConsumer.receiveNoWait();
    } catch (JMSException e) {
        throw new QueueingException("Failed to read message from MessageConsumer.");
    } finally {
        try { connection.close(); } catch (Exception e) {}
    }
    return message;
}

按Jms ID选择消息的语法

1 个答案: