APACHE Geronimo 试用之EJB3

APACHE Geronimo 试用之EJB3

  Geronimo是APACHE出品的一个JEE应用服务器，支持JMS,JDBC,EJB等，下面是我的试用：
接口类：

package  ejb;

import  java.math.BigDecimal;
import  javax.ejb.Remote;

@Remote
public   interface  Converter  {
    public BigDecimal dollarToRupees(BigDecimal dollars);

    public BigDecimal rupeesToEuro(BigDecimal rupees);
}

BEAN类：

package  ejb;

import  java.math.BigDecimal;
import  javax.ejb. * ;

@Stateless
public   class  ConverterBean  implements  Converter  {
    private BigDecimal rupeeRate = new BigDecimal("40.58");
    private BigDecimal euroRate = new BigDecimal("0.018368");

    public BigDecimal dollarToRupees(BigDecimal dollars) {
        BigDecimal result = dollars.multiply(rupeeRate);
        return result.setScale(2, BigDecimal.ROUND_UP);
    }

    public BigDecimal rupeesToEuro(BigDecimal rupees) {
        BigDecimal result = rupees.multiply(euroRate);
        return result.setScale(2, BigDecimal.ROUND_UP);
    }
}

引用EJB的Servlet：

package  webejb;

import  ejb.Converter;

import  java.io.IOException;
import  java.io.PrintWriter;
import  java.math.BigDecimal;

import  javax.ejb.EJB;
import  javax.servlet.ServletException;
import  javax.servlet.http.HttpServletRequest;
import  javax.servlet.http.HttpServletResponse;

public   class  ConverterHandler  extends  javax.servlet.http.HttpServlet  implements
        javax.servlet.Servlet  {
    @EJB(name = "ejb/Converter")
    private Converter converter;

    protected void doGet(HttpServletRequest request,
            HttpServletResponse response) throws ServletException, IOException {
        PrintWriter out = response.getWriter();
        String amount = request.getParameter("amount");
        if (amount != null && amount.length() > 0) {
            BigDecimal d = new BigDecimal(amount);
            BigDecimal rupeeAmount = converter.dollarToRupees(d);
            out.println("<p>" + amount + " Dollars are " + rupeeAmount
                    + " Rupees.<p>");
            BigDecimal euroAmount = converter.rupeesToEuro(rupeeAmount);
            out.println(amount + " Dollars are " + euroAmount + " Euro.");
        }
    }

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

geronimo-web.xml配置文件：

<? xml version="1.0" encoding="UTF-8" ?>
< web-app  xmlns ="http://geronimo.apache.org/xml/ns/j2ee/web-2.0.1"  
xmlns:nam ="http://geronimo.apache.org/xml/ns/naming-1.2"  
xmlns:sec ="http://geronimo.apache.org/xml/ns/security-2.0"  
xmlns:sys ="http://geronimo.apache.org/xml/ns/deployment-1.2" >

     < sys:environment >
         < sys:moduleId >
             < sys:groupId > default </ sys:groupId >
             < sys:artifactId > WebEJB </ sys:artifactId >
             < sys:version > 1.0 </ sys:version >
             < sys:type > car </ sys:type >
         </ sys:moduleId >
         < sys:dependencies >
             < sys:dependency >
                 < sys:groupId > default </ sys:groupId >
                     < sys:artifactId > TestEJB </ sys:artifactId >
                   < sys:version > 1.0 </ sys:version >
                   < sys:type > car </ sys:type >
             </ sys:dependency >         
         </ sys:dependencies >
     </ sys:environment >

     < context-root > /WebEJB </ context-root >

     < nam:ejb-ref  xmlns:nam ="http://geronimo.apache.org/xml/ns/naming-1.2" >
         < nam:ref-name > ejb/Converter </ nam:ref-name >
         < nam:pattern >
             < nam:groupId > default </ nam:groupId >
             < nam:artifactId > TestEJB </ nam:artifactId >
             < nam:version > 1.0 </ nam:version >
             < nam:name > ConverterBean </ nam:name >
         </ nam:pattern >
     </ nam:ejb-ref >

</ web-app >

WEB.XML文件：

<? 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 > WebEJB </ display-name >
     < welcome-file-list >
         < welcome-file > index.jsp </ welcome-file >
     </ welcome-file-list >
     < servlet >
         < description ></ description >
         < display-name > ConverterHandler </ display-name >
         < servlet-name > ConverterHandler </ servlet-name >
         < servlet-class > webejb.ConverterHandler </ servlet-class >
     </ servlet >
     < servlet-mapping >
         < servlet-name > ConverterHandler </ servlet-name >
         < url-pattern > /ConverterHandler </ url-pattern >
     </ servlet-mapping >
</ web-app >

测试页面index.jsp：

< html >
< head >
< title > Converter </ title >
</ head >
< body  bgcolor ="white" >
< h1 > Converter </ h1 >
< hr >
< p > Enter an amount to convert: </ p >
< form  method ="get"  action ="index.jsp" >< input  type ="text"
    name ="amount"  size ="25" >< br >
< p >< input  type ="submit"  value ="Submit" >   < input  type ="reset"
    value ="Reset" >
</ form >
< jsp:include  page ="/ConverterHandler"   />
</ body >

发布应用：
1：发布包含EJB文件的TestEJB.jar
2：发布WEB应用WebEJB.war
具体文件请点击此处下载：http://www.blogjava.net/Files/kinkding/Geromino_EJB_Test.rar
发布成功后，通过点击http://localhost:8080/WebEJB即可看到程序运行效果。