Java ActiveMQ避免新的连接启动

Question

import javax.jms.Connection;
import javax.jms.ConnectionFactory;
import javax.jms.Destination;
import javax.jms.JMSException;
import javax.jms.MessageProducer;
import javax.jms.Session;
import javax.jms.TextMessage;
import org.apache.activemq.ActiveMQConnectionFactory;
public class MessageSender {
    public static ConnectionFactory factory = null;
    public static Connection connection = null;
    public static Session session = null;
    public static Destination destination = null;
    public static MessageProducer producer = null;
    public static void sendMessage(String queueName,String messageContent) {
        try {
            factory = new ActiveMQConnectionFactory(
                    ActiveMQConnection.DEFAULT_BROKER_URL);            
            connection = factory.createConnection();            
            connection.start();
            session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
            destination = session.createQueue(queueName);        
            producer = session.createProducer(destination);
            TextMessage message = session.createTextMessage();
            message.setText(messageContent);
            producer.send(message);
            System.out.println("Sent: " + message.getText() );     
        } catch (JMSException e) {
            e.printStackTrace();
        }
    }
}

上面是我的java JMS代码，用于将消息推送到队列。每次我想要将消息推送到队列时，我过去常常调用如下

MessageSender.sendMessage("orderdetailsQueue","OrderReceivedIdB6789");  

所以对于每个消息它调用new connection.start()。我该怎么概括呢?

Answer 1

创建连接工厂，然后在每个sendMessage中创建连接可能不是一个好主意。

您可以将此连接工厂初始化部分移动到一个单例util类中，该类在实例化该util类时仅创建一次连接工厂。也使用PooledConnectionFactory代替正常的连接工厂，它创建了一个连接池，会话和生产者。sendMessage应该通过调用connectionUtil.getConnection()获得连接。sendMessage中的其余代码看起来很好，只是需要通过调用close()来释放finally中的会话、生产者和连接。

池连接工厂