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APACHE Geronimo 試用之EJB3

Geronimo是APACHE出品的一個JEE應用服務器，支持JMS,JDBC,EJB等，下面是我的試用：
接口類：

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類：

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>

<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>

測試頁面index.jsp：

<html>

<head>

<title>Converter</title>

</head>

<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>

發布應用：
1：發布包含EJB文件的TestEJB.jar
2：發布WEB應用WebEJB.war
具體文件請點擊此處下載：http://www.aygfsteel.com/Files/kinkding/Geromino_EJB_Test.rar
發布成功后，通過點擊http://localhost:8080/WebEJB即可看到程序運行效果。

posted on 2009-05-12 21:40 俊星閱讀(266) 評論(0) 編輯收藏

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APACHE Geronimo 試用之EJB3