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    俊星的BLOG

    APACHE Geronimo 試用之JMS

    1、通過控制臺的ActiveMQ創建如下JMS準備環境:
    Type     Name     Deployed As     State     Actions
    Connection Factory     jms/TestJMSFactory2     Server-wide     running     
    Queue     jms/TestJMSQueue2     Server-wide     running
    具體常見方法請參考:http://cwiki.apache.org/GMOxDOC21/web-application-for-jms-access.html

    2、創建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、創建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、創建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、發布及查看運行結果:
    將WebJMS.war發布即可,具體請點擊此處下載,運行結果的查看可通過下面的兩個URL實現:
    http://localhost:8080/WebJMS2/
    http://localhost:8080/WebJMS2/AdminServlet

    posted on 2009-05-12 22:09 俊星 閱讀(375) 評論(0)  編輯  收藏


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