OpenJMS应用实例

        这段时间在写公司的综合互动平台，用户可以通过短信、IVR等实时参与互动节目，为了缩短服务器响应时间，减轻大量并发时给服务器带来的压力，项目使用了JMS异常消息通讯，在比较了几种开源的JMS中间件之后，我最后选择OpenJMS，相比其他几种来说，OpenJMS的配置更为简单，使用也方便，只不过功能相对简单一点。

消息发送端

package com.hing.tools;

import java.io.Serializable;
import java.util.Properties;

import javax.jms.Message;
import javax.jms.Session;
import javax.jms.Topic;
import javax.jms.TopicConnection;
import javax.jms.TopicConnectionFactory;
import javax.jms.TopicPublisher;
import javax.jms.TopicSession;
import javax.naming.Context;
import javax.naming.InitialContext;

public class JMSTool ...{
    public static void send(Object obj) ...{
        String url = "tcp://localhost:3035";
        String topic_name = "topic1";
        try ...{
            String factory_name = "ConnectionFactory";
            Properties props = new Properties();

            props
                    .put(Context.INITIAL_CONTEXT_FACTORY,
                            "org.exolab.jms.jndi.InitialContextFactory");
            props.put(Context.PROVIDER_URL, url);

            // lookup the connection factory from the context
            Context context = new InitialContext(props);
            TopicConnectionFactory factory = (TopicConnectionFactory) context
                    .lookup(factory_name);

            // if we can't find the factory then throw an exception
            if (factory != null) ...{
                TopicConnection connection = factory
                        .createTopicConnection();
                TopicSession session = connection
                        .createTopicSession(false,
                                Session.AUTO_ACKNOWLEDGE);
                Topic topic = session
                        .createTopic(topic_name);

                if (topic != null) ...{
                    TopicPublisher publisher = session
                            .createPublisher(topic);
                    if (publisher != null) ...{
                        Message msg=session.createObjectMessage((Serializable) obj);
                        publisher
                                .publish(msg);
                    }
                }

                // close the connction
                connection.close();
            }
        } catch (Exception e) ...{
            LogTool.error(JMSTool.class,e);

        }
    }
}

 消息接收端

 

package com.hing.tools;

import java.util.Properties;

import javax.jms.Message;
import javax.jms.MessageListener;
import javax.jms.ObjectMessage;
import javax.jms.Session;
import javax.jms.Topic;
import javax.jms.TopicConnection;
import javax.jms.TopicConnectionFactory;
import javax.jms.TopicSession;
import javax.jms.TopicSubscriber;
import javax.naming.Context;
import javax.naming.InitialContext;


@SuppressWarnings("serial")
public class SMSMOConsumer implements MessageListener ...{
    public SMSMOConsumer() ...{
        String url = "tcp://localhost:3035";
        String topic_name = "topic1";
        try ...{
            String factory_name = "ConnectionFactory";
            Properties props = new Properties();

            props
                    .put(Context.INITIAL_CONTEXT_FACTORY,
                            "org.exolab.jms.jndi.InitialContextFactory");
            props.put(Context.PROVIDER_URL, url);

            // lookup the connection factory from the context
            Context context = new InitialContext(props);
            TopicConnectionFactory factory = (TopicConnectionFactory) context
                    .lookup(factory_name);
            Topic topic=(Topic) context.lookup(topic_name);

            // if we can't find the factory then throw an exception
            if (factory != null) ...{
                TopicConnection connection = factory
                        .createTopicConnection();
                TopicSession session = connection
                        .createTopicSession(false,
                                Session.AUTO_ACKNOWLEDGE);
                topic = (Topic) context.lookup("topic1");

                // 创建Topic subscriber
                TopicSubscriber topicSubscriber = session.createSubscriber(topic);
                // 设置订阅监听
                topicSubscriber.setMessageListener(this);

                // 启动信息接收
                connection.start();
                LogTool.debug(this.getClass(),"start consumer listener");

            }
        } catch (Exception e) ...{
            LogTool.error(this.getClass(),e);
        }
    }

    public void onMessage(Message message) ...{
        // TODO Auto-generated method stub
        if(message instanceof ObjectMessage)...{
            ObjectMessage obj=(ObjectMessage)message;
         }  
    
        
}

OpenJMS的配置文件内容

 

<?xml version="1.0"?>

<Configuration>

  <!-- Optional. This represents the default configuration  -->
  <ServerConfiguration host="localhost" embeddedJNDI="true" />
  
  <Connectors>
    <Connector scheme="tcp">
      <ConnectionFactories>
        <ConnectionFactory name="ConnectionFactory" />
      </ConnectionFactories>
    </Connector>
    <Connector scheme="rmi">
      <ConnectionFactories>
        <QueueConnectionFactory name="JmsQueueConnectionFactory" />
        <TopicConnectionFactory name="JmsTopicConnectionFactory" />
      </ConnectionFactories>
    </Connector>
  </Connectors>
    
  <!-- Required  -->
  <DatabaseConfiguration>
    <RdbmsDatabaseConfiguration
      driver="org.apache.derby.jdbc.EmbeddedDriver"
      url="jdbc:derby:openjmsdb;create=true" 
      user="openjms" 
      password="openjms"/>
  </DatabaseConfiguration>

  <!-- Required -->    
  <AdminConfiguration script="${openjms.home}instartup.bat" />
    
  <!-- Optional. If not specified, no destinations will be created -->
  <AdministeredDestinations>
    <AdministeredTopic name="topic1">
      <Subscriber name="smsmo" />
    </AdministeredTopic>
    <AdministeredTopic name="topic2">
      <Subscriber name="smsmt" />
    </AdministeredTopic>
  
    <AdministeredQueue name="queue1" />
    <AdministeredQueue name="queue2" />
    <AdministeredQueue name="queue3" />
  </AdministeredDestinations>

  <!-- Optional. If not specified, no users will be created -->
  <Users>
    <User name="admin" password="openjms" /> 
  </Users>

</Configuration>