/*
* JBoss, Home of Professional Open Source.
* Copyright 2006, Red Hat Middleware LLC, and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.tutorial.ear.servlet;
import org.jboss.tutorial.ear.bean.CalculatorLocal;
import javax.ejb.EJB;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;
/**
* comment
*
* @author Bill Burke
*/
public class CalculatorActionServlet extends HttpServlet
{
protected void doGet(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException
{
doit(req, resp);
}
protected void doPost(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException
{
doit(req, resp);
}
/**
* Simulate injection of Calculator EJB
*
* @throws ServletException
*/
public void init() throws ServletException
{
super.init();
try
{
InitialContext ctx = new InitialContext();
// J2EE 1.5 has not yet defined exact XML syntax for EJB3
CalculatorLocal calculator = (CalculatorLocal) ctx.lookup("tutorial/calculator/local");
setCalculator(calculator);
}
catch (NamingException e)
{
throw new RuntimeException(e);
}
}
private CalculatorLocal calculator;
/**
* The @EJB annotation is similated. Tomcat does not yet understand injection annotations.
* @param calculator
*/
@EJB(name = "calculator")
public void setCalculator(CalculatorLocal calculator)
{
this.calculator = calculator;
}
protected void doit(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException
{
int op1 = Integer.parseInt(req.getParameter("op1"));
int op2 = Integer.parseInt(req.getParameter("op2"));
String action = req.getParameter("action");
int result = 0;
if (action.equals("Add"))
result = calculator.add(op1, op2);
else if (action.equals("Subtract")) result = calculator.subtract(op1, op2);
resp.setContentType("text/html");
PrintWriter writer = resp.getWriter();
writer.println("");
writer.println("");
writer.println("Answer: " + result + "
");
writer.println("");
}
}