ActiveMQ-是否可以在CLIENT_ACKNOWLEDGE模式下确认单个消息

Question

根据http://docs.oracle.com/javaee/6/api/javax/jms/Message.html#acknowledge（）

客户端可以在消费每条消息时分别对其进行确认，也可以选择将消息确认为应用程序定义的组（通过在组中最后收到的消息上调用确认来完成，从而确认会话消耗的所有消息。 ）

如何在ActiveMQ中做到这一点？我无法使其工作。

Answer 1

这是ActiveMQ客户端的示例，

import javax.jms.Connection;
import javax.jms.JMSException;

import org.apache.activemq.ActiveMQConnectionFactory;
import org.apache.activemq.ActiveMQMessageConsumer;
import org.apache.activemq.ActiveMQSession;
import org.apache.activemq.command.ActiveMQTextMessage;

public class SimpleConsumer {

    public static void main(String[] args) throws JMSException {
        Connection conn = null;
        try {
            ActiveMQConnectionFactory cf = new ActiveMQConnectionFactory("tcp://localhost:61616");
            conn = cf.createConnection("consumer", "consumer");
            ActiveMQSession session = (ActiveMQSession) conn.createSession(false,
                    ActiveMQSession.INDIVIDUAL_ACKNOWLEDGE);
            ActiveMQMessageConsumer consumer = (ActiveMQMessageConsumer) session
                    .createConsumer(session.createQueue("QUEUE"));
            conn.start();
            ActiveMQTextMessage msg = null;
            while ((msg = (ActiveMQTextMessage) consumer.receive()) != null) {
                System.out.println("Received message is: " + msg.getText());
                msg.acknowledge();
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (conn != null) {
                try {
                    conn.close();
                } catch (Exception e) {
                }
            }
        }
    }
}