核心概念:

Ø连接工厂(ConnectionFactory)客户端用来创建连接的管理对象。
Ø连接(Connection)代表一个与JMS提供者的活动连接。
Ø目的(Destination)标识消息接收方式。
Ø会话(Session)接收和发送消息的会话线程。
Ø消息生产者(MessageProducer)会话使用它把消息发送到目的地。
Ø消息消费者(MessageConsumer)会话使用它从目的地接收消息生产者发送的消息
 
1.发送消息的客户端使用JMS的过程

(1)使用JNDI查询管理对象ConnectionFactory和Destination

(2)使用管理对象ConnectionFactory建立连接Connection

(3)使用连接Connection建立会话Session

(4)使用会话Session和管理对象Destination创建消息生产者MessagerProducer

(5)使用消息生产者MessagerPriducer发送消息

 

2.接收消息的客户端使用JMS的过程

(1)使用JNDI查询管理对象ConnectionFactory和Destination

(2)使用管理对象ConnectionFactory建立连接Connection

(3)使用连接Connection建立会话Session

(4)使用会话Session和管理对象Destination创建消息生产者MessagerProducer

(5)使用消息生产者MessagerConsumer接收消息

3. JMS中支持两种事务方式:事务性会话和JTA事务

  a)创建事务性会话的代码:

  qsession=qcon.createQueueSession(true; //在PTP方式下创建事务性会话

  Session.AUTO_ACKNOWLEDGE

  );

  tsession=tcon.createTopicSession(

  true; //在Pub/Sub方式下创建事务性会话

  Session.AUTO_ACKNOWLEDGE

  );

b)JTA事务:JTA支持跨数据源的事务,步骤如下:

(1)创建非事务性会话

QueuesSession session=connection.createQueueSession(

                         false,Session.AUTO_ACKNOWLEGE);

(2)使用JNDI查询JTA事务引用

Context ctx = new InitialContext();

UserTansaction ux=(UserTansaction)ctx.lookup

(“javax.transaction.UserTansaction”);

(3)开始事务

ux.begin();

(4)执行业务操作

(5)提交或回滚事务

提交事务:ux.commit();

回滚事务:ux.rollback();

服务区端代码

package test.jms;

import javax.jms.*;
import javax.naming.*;

public class Server {
  private static Server instance = new Server();
  private  TopicSession tsession = null;
  private  Topic topic = null;
  private  TopicPublisher tpub = null;

  private TopicConnectionFactory tcf = null;
  private TopicConnection tconn = null;
  private Context ctx = null;

  private Server() {
    init();
  }

  public static Server getInstance(){
    return instance;
  }


  public void sendMessage(MessageInfo msgInfo){
    int tryTimes = 0;
      while(true){
        try {
          if(msgInfo == null){
            break;
          }
          Message msg = tsession.createMessage();
          msg.setStringProperty("xxxx", msgInfo.getxxxx());
          msg.setStringProperty("xxxx", msgInfo.getxxxx());
          msg.setStringProperty("xxxx", msgInfo.getxxxx());
          msg.setStringProperty("xxxx", msgInfo.getxxxx());
          msg.setStringProperty("xxxx", msgInfo.getxxxx());
          msg.setIntProperty("xxxx", msgInfo.getxxxx());

          tpub.publish(msg);
          break;
        }
        catch (Exception e) {
          if (!init()) {
            if (tryTimes < 20) { //默认15分钟可以恢复数据库连接,这里冗余一部分
              tryTimes++;
              try{
                Thread.sleep(60000); //一分种后重试
              }
              catch(Exception ex){
                Logger.log(Logger.DEBUG_TYPE,ex);
              }
              continue;
            }
            else{
              System.out.println("系统消息机制异常,系统将自动退出!请进行系统恢复!");
              SysTool.exit(0);
              return;
            }
          }
        }
      }


  }

  private boolean init() {
    try {
      try{
        tpub.close();
      }
      catch(Exception ex){ }
      try{
        tsession.close();
      }
      catch(Exception ex){  }
      try{
        tconn.close();
      }
      catch(Exception ex){  }
      try{
        ctx.close();
      }
      catch(Exception ex){ }

      ctx = new InitialContext();
      tcf = (TopicConnectionFactory)ctx.lookup(
        "ConnectionFactory");
      tconn = tcf.createTopicConnection();
      tsession = tconn.createTopicSession(false,TopicSession.AUTO_ACKNOWLEDGE);
      topic = (Topic)ctx.lookup("topic/xxxxTopic");
      tpub = tsession.createPublisher(topic);
      tconn.start();
      return true;
    }
    catch (Exception e) {
      Logger.log(Logger.DEBUG_TYPE, e);
      return false;
    }
  }

}

客户端代码

package test;
import java.util.Hashtable;
import javax.jms.Message;
import javax.jms.MessageListener;
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;

public class JMSClinet {
  public static void main(String[] args) {

        while(true){
        try {
            TopicSession tsession = null;

            TopicSubscriber tsub = null;
            Hashtable ht = new Hashtable();
            ht.put(Context.INITIAL_CONTEXT_FACTORY,
                    "org.jnp.interfaces.NamingContextFactory");
            ht.put(Context.PROVIDER_URL, "ip地址:1099");
            ht.put("java.naming.rmi.security.manager", "yes");
            ht.put(Context.URL_PKG_PREFIXES, "org.jboss.naming");

            Context ctx = new InitialContext(ht);

            TopicConnectionFactory factory = (TopicConnectionFactory) ctx
                    .lookup("ConnectionFactory");

            TopicConnection connection = factory.createTopicConnection();


            TopicSession session = connection.createTopicSession(false,
                    Session.AUTO_ACKNOWLEDGE);

            Topic topic = (Topic) ctx.lookup("topic/logInAndOutTopic");

            tsub = session.createSubscriber(topic);

            connection.start();
            Message msg = tsub.receive();
            String xxxx= msg.getStringProperty("xxxx");
            String xxxx= msg.getStringProperty("xxxx");
            String xxxx= msg.getStringProperty("xxxx");
            String xxxx= msg.getStringProperty("xxxx");
            String xxxx= msg.getStringProperty("xxxx");
            int xxxx= msg.getIntProperty("xxxx");     
            connection.close();
        }
        catch (Exception e) {
            e.printStackTrace();
        }
        }
    }

}

配置文件

 <mbean code="org.jboss.mq.server.jmx.Topic"
  name="jboss.mq.destination:service=Topic,name=xxxxTopic">
    <depends optional-attribute-name="DestinationManager">jboss.mq:service=DestinationManager</depends>
    <depends optional-attribute-name="SecurityManager">jboss.mq:service=SecurityManager</depends>
    <attribute name="SecurityConf">
       <security>
         <role name="xxxx" read="true" write="true"/>
         <role name="xxxx" read="true" write="true" create="false"/>
         <role name="xxxx" read="true" write="true" create="true"/>
      </security>
    </attribute>
 </mbean>

posted on 2013-01-22 18:56  一天不进步,就是退步  阅读(960)  评论(0编辑  收藏  举报