activemq BytesMessage || TextMessage

需求：使用 python 程序向 activemq 的主题推送数据，默认推送的数据类型是 BytesMessage，java 程序那边接收较为麻烦，改为推送 TextMessage 类型的数据

解决方法：想要推送 TextMessage 需要指定 auto_content_length=False

示例代码如下：

# coding=utf-8
import stomp

def send_to_topic(msg):
    try:
        conn = stomp.Connection10([("10.10.19.200", 61613)], auto_content_length=False)
        conn.start()
        conn.connect()
        conn.send('/topic/HIATMP.HISENSE.ILLEGAL.AIREVIEW', msg)
        conn.disconnect()
        return 1
    except Exception as e:
        # logging.error(f"send message with activemq failed, error is:{e}")
        return 0

if __name__ == "__main__":
    result = send_to_topic("ILLEGAL01,2.1,0001,5b9171c2815342c5bce90f601f14d182,1,02,鲁BJ0A92,2019-04-26 15:51:45,12080,601078111050,宁夏路与福州南路路口,370202000000,1,1,370202000000011125,3,01,,0,http://10.10.19.250/1.png,http://10.10.19.250/2.png,http://10.10.19.250/3.png,,717/1846/136/36/1,2,2019-04-26 15:51:53,,,,,,,,,1,不按道行驶,,,,,,,,,1,10")
    print result

　　

例外，附上 activemq 关于主题的生产者，消费者代码：

1）python 版本（stomp协议）

生产者：

# coding=utf-8
import stomp

def send_to_topic(msg):
    try:
        conn = stomp.Connection10([("10.10.19.200", 61613)], auto_content_length=False)
        conn.start()
        conn.connect()
        conn.send('/topic/HIATMP.HISENSE.ILLEGAL.AIREVIEW', msg)
        conn.disconnect()
        return 1
    except Exception as e:
        # logging.error(f"send message with activemq failed, error is:{e}")
        return 0

if __name__ == "__main__":
    result = send_to_topic("ILLEGAL01,2.1,0001,5b9171c2815342c5bce90f601f14d182,1,02,鲁BJ0A92,2019-04-26 15:51:45,12080,601078111050,宁夏路与福州南路路口,370202000000,1,1,370202000000011125,3,01,,0,http://10.10.19.250/1.png,http://10.10.19.250/2.png,http://10.10.19.250/3.png,,717/1846/136/36/1,2,2019-04-26 15:51:53,,,,,,,,,1,不按道行驶,,,,,,,,,1,10")
    print result

　　

消费者：

# coding=utf-8
import stomp

class SampleListener(object):
    def on_message(self, headers, message):
        print('headers: %s' % headers['destination'])
        print('message: %s\n' % message)

# 从主题接收消息
def receive_from_topic():
    conn = stomp.Connection10([("10.10.19.200", 61613)])
    conn.set_listener("", SampleListener())
    conn.start()
    conn.connect()
    conn.subscribe("/topic/HIATMP.HISENSE.ILLEGAL.AIREVIEW")
    while True:
        pass
    # conn.disconnect()

if __name__ == '__main__':
    receive_from_topic()

2）java 版本（tcp协议）

生产者：

package ActiveMQ;
import javax.jms.Connection;
import javax.jms.ConnectionFactory;
import javax.jms.DeliveryMode;
import javax.jms.JMSException;
import javax.jms.MessageProducer;
import javax.jms.Session;
import javax.jms.TextMessage;
import javax.jms.Topic;

import org.apache.activemq.ActiveMQConnectionFactory;

import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Random;
import java.util.UUID;

public class TopicProducer {

    public static void main(String[] args) {
        //连接信息设置
        String username = "admin";
        String password = "admin";
        String brokerURL = "failover://tcp://10.10.19.200:61616";
        //连接工厂
        ConnectionFactory connectionFactory = null;
        //连接
        Connection connection = null;
        //会话 接受或者发送消息的线程
        Session session = null;
        //消息的主题
        Topic topic = null;
        //消息生产者
        MessageProducer messageProducer = null;
        //实例化连接工厂
        connectionFactory = new ActiveMQConnectionFactory(username, password, brokerURL);
        try {
            //通过连接工厂获取连接
            connection = connectionFactory.createConnection();
            //启动连接
            connection.start();
            //创建session
            session = connection.createSession(true, Session.AUTO_ACKNOWLEDGE);
            //创建名为TopicTest的主题
//            topic = session.createTopic("HIATMP.HISENSE.ILLEGAL");
            topic = session.createTopic("HIATMP.HISENSE.ILLEGAL.AIREVIEW");
            //创建主题生产者
            messageProducer = session.createProducer(topic);
            messageProducer.setDeliveryMode(DeliveryMode.NON_PERSISTENT);//不将数据持久化
            //发送主题
            TextMessage message = null;
            for (int i = 0; i < 1; i--) {
                //创建要发送的文本信息
                SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss SSS");//设置日期格式
                String dateTime = df.format(new Date());// new Date()为获取当前系统时间
//                message = session.createTextMessage("illegal" + dateTime);

                String uuid = UUID.randomUUID().toString().replaceAll("-","");
                String message_fmt = String.format("ILLEGAL01,2.1,0001,%s,1,02,鲁BJ0A92,2019-04-26 15:51:45,12080,601078111050,宁夏路与福州南路路口,370202000000,1,1,370202000000011125,3,01,,0,http://10.10.19.250/1.png,http://10.10.19.250/2.png,http://10.10.19.250/3.png,,717/1846/136/36/1,2,2019-04-26 15:51:53,,,,,,,,,1,不按道行驶,,,,,,,,,1,10", uuid);
                message = session.createTextMessage(message_fmt);
                //通过主题生产者发出消息
                messageProducer.send(message);
                System.out.println("发送成功：" + message.getText());
                session.commit();  // 提交到mq

                Thread.sleep( 200 * 1 );
            }
            session.commit();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (null != connection) {
                try {
                    connection.close();
                } catch (JMSException e) {
                    e.printStackTrace();
                }
            }
        }
    }
}

producer

消费者：

package ActiveMQ;

import javax.jms.Connection;
import javax.jms.ConnectionFactory;
import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.MessageConsumer;
import javax.jms.MessageListener;
import javax.jms.Session;
import javax.jms.TextMessage;
import javax.jms.BytesMessage;
import javax.jms.Topic;

import org.apache.activemq.ActiveMQConnectionFactory;
import org.apache.activemq.transport.stomp.Stomp;

public class TopicConsumer {

    public static void main(String[] args) {
//        Stomp.Headers.Send.PERSISTENT;

        //连接信息设置
        String username = "admin";
        String password = "admin";
        String brokerURL = "failover://tcp://10.10.19.200:61616";
//        String brokerURL = "failover://stomp://0.0.0.0:61613";
        //连接工厂
        ConnectionFactory connectionFactory = null;
        //连接
        Connection connection = null;
        //会话 接受或者发送消息的线程
        Session session = null;
        //主题的目的地
        Topic topic = null;
        //主题消费者
        MessageConsumer messageConsumer = null;
        //实例化连接工厂
        connectionFactory = new ActiveMQConnectionFactory(username, password, brokerURL);

        try {
            //通过连接工厂获取连接
            connection = connectionFactory.createConnection();
            //启动连接
            connection.start();
            //创建session
            session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
            //创建一个连接TopicTest的主题
            topic = session.createTopic("HIATMP.HISENSE.ILLEGAL.AIREVIEW");
            //创建主题消费者
            messageConsumer = session.createConsumer(topic);

        messageConsumer.setMessageListener(new MyMessageListener());
        } catch (JMSException e) {
        e.printStackTrace();
        }
        }

        }

class MyMessageListener implements MessageListener {

    @Override
    public void onMessage(Message message) {
        System.out.println(message);
//        接收 BytesMessage
//        BytesMessage bytesMessage = (BytesMessage) message;

        TextMessage bytesMessage = (TextMessage) message;
        try {
//            接收 BytesMessage
//            byte []bt = new byte[(int) bytesMessage.getBodyLength()];
//            bytesMessage.readBytes(bt);
//            String str = new String(bt);
//            System.out.println("接收订阅主题：" + str);

            System.out.println("接收订阅主题：" + bytesMessage.getText());

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

consumer

end~