从 MQ 消费消息

Question

我正在尝试使用来自 MQ 的消息，但代码挂起并且不显示输出。

JmsFactoryFactory FF = jmsFactoryFactory.getInstance(WMQConstants.WMQ_PROVIDER);
JmsConnectionFactory cf = FF.createConnectionFactory();
cf.setStringProperty(WMQConstants.WMQ_HOST_NAME, HOST);
cf.setStringProperty(WMQConstants.WMQ_PORT, PORT);
cf.setStringProperty(WMQConstants.WMQ_CHANNEL, CHANNEL);
cf.setStringProperty(WMQConstants.WMQ_CONNECTION_MODE, WMQConstants.WMQ_CM_CLIENT);
cf.setStringProperty(WMQConstants.WMQ_QUEUE_MANAGER, QMGR);
cf.setStringProperty(WMQConstants.WMQ_APPLICATIONNAME, "JMS");
Connection connection = cf.createConnection();
Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
destination = session.createQueue(queuename);
MessageConsumer consumer1 = session.createConsumer(destination);

Message reply = consumer1.receive();
System.out.println(reply);

它不显示消息并挂起，甚至不终止。

Answer 1

您需要在 javax.jms.Connection 的实例上调用 start() 才能让消息流向消费者，例如：

connection.start()

此外，值得注意的是调用 javax.jms.MessageConsumer#receive() is expected to block until a message is received so you're seeing the expected behavior there. If you don't want to block you can call javax.jms.MessageConsumer#receive(long) 并指定超时（以毫秒为单位）。

从 MQ 消费消息

Consume message from MQ

java

jms

ibm-mq