APACHE Geronimo 试用之JMS

APACHE Geronimo 试用之JMS

1、通过控制台的ActiveMQ创建如下JMS准备环境：

Type     Name     Deployed As     State     Actions
Connection Factory     jms/TestJMSFactory2     Server-wide     running     
Queue     jms/TestJMSQueue2     Server-wide     running

具体常见方法请参考：http://cwiki.apache.org/GMOxDOC21/web-application-for-jms-access.html

2、创建AdminServlet：

package  webjms;

import  java.io.IOException;
import  java.io.PrintWriter;

import  javax.annotation.Resource;
import  javax.jms.Connection;
import  javax.jms.ConnectionFactory;
import  javax.jms.JMSException;
import  javax.jms.Message;
import  javax.jms.MessageConsumer;
import  javax.jms.Queue;
import  javax.jms.Session;
import  javax.jms.TextMessage;
import  javax.servlet.ServletException;
import  javax.servlet.http.HttpServletRequest;
import  javax.servlet.http.HttpServletResponse;

/** */ /**
 * Servlet implementation class for Servlet: AdminServlet
 * 
 */
public   class  AdminServlet  extends  javax.servlet.http.HttpServlet  implements
        javax.servlet.Servlet  {
    @Resource(name = "jms/TestJMSFactory2")
    private ConnectionFactory connectionFactory;

    @Resource(name = "jms/TestJMSQueue2")
    private Queue queue;

    public AdminServlet() {
        super();
    }

    protected void doGet(HttpServletRequest request,
            HttpServletResponse response) throws ServletException, IOException {
        PrintWriter out = response.getWriter();
        if (connectionFactory == null) {
            out.println("Connection Factory lookup has failed");
            return;
        }
        if (queue == null) {
            out.println("Queue lookup has failed");
            return;
        }
        Connection connection = null;
        try {
            connection = connectionFactory.createConnection();
            Session session = connection.createSession(false,
                    Session.AUTO_ACKNOWLEDGE);
            MessageConsumer consumer = session.createConsumer(queue);
            connection.start();
            out
                    .println("The following information has been received for updation\n");
            while (true) {
                Message m = consumer.receive();
                if (m instanceof TextMessage) {
                    TextMessage message = (TextMessage) m;
                    out.println(message.getText());
                } else {
                    break;
                }
            }
        } catch (JMSException e) {
            e.printStackTrace();
        } finally {
            if (connection != null) {
                try {
                    connection.close();
                } catch (JMSException e1) {
                }
            }
        }
    }

    protected void doPost(HttpServletRequest request,
            HttpServletResponse response) throws ServletException, IOException {
        doGet(request, response);
    }
}

3、创建UserServlet：

package  webjms;

import  java.io.IOException;
import  java.io.PrintWriter;
import  java.util.Enumeration;

import  javax.annotation.Resource;
import  javax.jms.Connection;
import  javax.jms.ConnectionFactory;
import  javax.jms.JMSException;
import  javax.jms.MessageProducer;
import  javax.jms.Queue;
import  javax.jms.Session;
import  javax.jms.TextMessage;
import  javax.servlet.ServletException;
import  javax.servlet.http.HttpServletRequest;
import  javax.servlet.http.HttpServletResponse;

public   class  UserServlet  extends  javax.servlet.http.HttpServlet  implements
        javax.servlet.Servlet  {
    @Resource(name = "jms/TestJMSFactory2")
    private ConnectionFactory connectionFactory;
    @Resource(name = "jms/TestJMSQueue2")
    private Queue queue;
    static final long serialVersionUID = 1L;

    public UserServlet() {
        super();
    }

    protected void doGet(HttpServletRequest request,
            HttpServletResponse response) throws ServletException, IOException {
        PrintWriter out = response.getWriter();
        if (connectionFactory == null) {
            out.println("Connection Factory lookup has failed");
            return;
        }

        if (queue == null) {
            out.println("Queue lookup has failed");
            return;
        }

        Connection connection = null;
        try {
            connection = connectionFactory.createConnection();
            connection.start();
            Session session = connection.createSession(false,
                    Session.AUTO_ACKNOWLEDGE);
            MessageProducer producer = session.createProducer(queue);
            TextMessage message = session.createTextMessage();
            Enumeration arr = request.getParameterNames();
            while (arr.hasMoreElements()) {
                String fields = (String) arr.nextElement();
                String paramname[] = request.getParameterValues(fields);
                for (int i = 0; i < paramname.length; i++) {
                    String s = null;
                    s = fields + ":" + paramname[i];
                    message.setText(s);
                    producer.send(message);
                }

            }
            out.println("Your request has been sent to administrator.");
            producer.send(session.createMessage());
        } catch (JMSException e) {
            e.printStackTrace();
        } finally {
            if (connection != null) {
                try {
                    connection.close();
                } catch (JMSException e1) {
                }
            }
        }
    }

    protected void doPost(HttpServletRequest request,
            HttpServletResponse response) throws ServletException, IOException {
        doGet(request, response);
    }
}

4、创建index.jsp文件：

<% @ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1" %>
<! DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd" >
< html >
< head >
< meta  http-equiv ="Content-Type"  content ="text/html; charset=ISO-8859-1" >
< title > Sample Web Application accessing JMS Resources </ title >
</ head >
< body >
< form  action ="/WebJMS2/UserServlet" >
< h1 > Please enter the updated information </ h1 >
< table >
     < tr >
         < td > UserName: </ td >
         < td >< input  type ="text"  name ="username"  size ="30" ></ td >
     </ tr >
     < tr >
         < td > UserID: </ td >
         < td >< input  type ="text"  name ="userid"  size ="30" ></ td >
     </ tr >
     < tr >
         < td > Old Address: </ td >
         < td >< input  type ="text"  name ="oldaddress"  size ="30" ></ td >
     </ tr >
     < tr >
         < td > New Address: </ td >
         < td >< input  type ="text"  name ="newaddress"  size ="30" ></ td >
     < tr >
</ table >
< input  type ="submit"  value ="Submit" ></ form >
</ body >
</ html >

5、geronimo-web.xml的配置：

<? xml version="1.0" encoding="UTF-8" ?>
< web-app  xmlns ="http://geronimo.apache.org/xml/ns/j2ee/web-1.2"  
         xmlns:nam ="http://geronimo.apache.org/xml/ns/naming-1.2"  
         xmlns:sec ="http://geronimo.apache.org/xml/ns/security-1.1"  
         xmlns:sys ="http://geronimo.apache.org/xml/ns/deployment-1.2" >
   < sys:environment >
     < sys:moduleId >
       < sys:groupId > default </ sys:groupId >
       < sys:artifactId > WebJMS2 </ sys:artifactId >
       < sys:version > 1.0 </ sys:version >
       < sys:type > car </ sys:type >
     </ sys:moduleId >
     < sys:dependencies >
             < sys:dependency >
                 < sys:groupId > org.apache.geronimo.configs </ sys:groupId >
                 < sys:artifactId > activemq-ra </ sys:artifactId >
                 < sys:version > 2.1.4 </ sys:version >
                 < sys:type > car </ sys:type >
             </ sys:dependency >
         </ sys:dependencies >
   </ sys:environment >
   < context-root > /WebJMS2 </ context-root >
   < nam:resource-ref >
         < nam:ref-name > jms/TestJMSFactory2 </ nam:ref-name >
         < nam:pattern >
             < nam:groupId > org.apache.geronimo.configs </ nam:groupId >
             < nam:artifactId > activemq-ra </ nam:artifactId >
             < nam:version > 2.1.4 </ nam:version >
             < nam:name > DefaultActiveMQConnectionFactory </ nam:name >
         </ nam:pattern >
     </ nam:resource-ref >
     < nam:resource-env-ref >
         < nam:ref-name > jms/TestJMSQueue2 </ nam:ref-name >
         < nam:pattern >
             < nam:groupId > org.apache.geronimo.configs </ nam:groupId >
             < nam:artifactId > activemq-ra </ nam:artifactId >
             < nam:version > 2.1.4 </ nam:version >
             < nam:name > SendReceiveQueue </ nam:name >
         </ nam:pattern >
     </ nam:resource-env-ref >
</ web-app >

6、web.xml文件的配置：

<? xml version="1.0" encoding="UTF-8" ?>
< web-app  xmlns:xsi ="http://www.w3.org/2001/XMLSchema-instance"
    xmlns ="http://java.sun.com/xml/ns/javaee"  
    xmlns:web ="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
    xsi:schemaLocation ="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
    id ="WebApp_ID"  version ="2.5" >
     < display-name > WebJMS </ display-name >
     < welcome-file-list >
         < welcome-file > index.jsp </ welcome-file >
     </ welcome-file-list >
     < servlet >
         < description ></ description >
         < display-name > AdminServlet </ display-name >
         < servlet-name > AdminServlet </ servlet-name >
         < servlet-class > webjms.AdminServlet </ servlet-class >
     </ servlet >
     < servlet >
         < description ></ description >
         < display-name > UserServlet </ display-name >
         < servlet-name > UserServlet </ servlet-name >
         < servlet-class > webjms.UserServlet </ servlet-class >
     </ servlet >
     < servlet-mapping >
         < servlet-name > AdminServlet </ servlet-name >
         < url-pattern > /AdminServlet </ url-pattern >
     </ servlet-mapping >
     < servlet-mapping >
         < servlet-name > UserServlet </ servlet-name >
         < url-pattern > /UserServlet </ url-pattern >
     </ servlet-mapping >
</ web-app >

7、发布及查看运行结果：
将WebJMS.war发布即可，具体请 点击此处下载，运行结果的查看可通过下面的两个URL实现：
http://localhost:8080/WebJMS2/
http://localhost:8080/WebJMS2/AdminServlet