Question

This code使用线程并按预期工作但我试图在没有线程的情况下做同样的事情。

首先我发送10条消息

 for (int i = 0; i < 10; i++) {
            String msg = "ABCD" + i;
            TextMessage textMessage = Communication._getInstance().session.createTextMessage(msg);
            textMessage.setJMSType(msg);
            Communication._getInstance().getProducer().send(textMessage);
        }

在此处接收10条消息。

 public static ArrayList messages() {
    EFLogger.LogInfo("MessageProcessor", "in messsages method");

    ArrayList msg = new ArrayList();
    try {
        for (int i = 0; i < 10; i++) {
            Message message = Communication._getInstance().getConsumer().receive(2000);

            if (message instanceof TextMessage) {

                TextMessage textMessage = (TextMessage) message;
                msg.add(textMessage.getJMSType());
            } else {
                EFLogger.LogInfo("MessageProcessor", "Received: " + message);
            }
            Communication._getInstance().session.close();
            Communication._getInstance().connection.close();
        }


    } catch (JMSException e) {
        e.printStackTrace();
    }
    return msg;
}

但我得到唯一的第一条消息，其他消息甚至不是instanceof TextMessage并显示为空

注意：每次尝试关闭连接，收到消息后，结果保持不变。

日志

Message Received JMSType [ ABCD1 ] Text [ ABCD1 ] | root | main
2016-10-07 12:24:51,596 | INFO  | Closing the connection | root | main
2016-10-07 12:24:53,640 | INFO  | Received: null | root | main
2016-10-07 12:24:53,640 | INFO  | Closing the connection | root | main
2016-10-07 12:24:55,659 | INFO  | Received: null | root | main
2016-10-07 12:24:55,660 | INFO  | Closing the connection | root | main
2016-10-07 12:24:57,676 | INFO  | Received: null | root | main
2016-10-07 12:24:57,676 | INFO  | Closing the connection | root | main
2016-10-07 12:24:59,689 | INFO  | Received: null | root | main
2016-10-07 12:24:59,689 | INFO  | Closing the connection | root | main

获取消息activemq consumer.receive（）？

0 个答案: