TS 68 EJB31 Validation

"EJB 3.1 Validation" Test Specification for "NetBeans 6.8"

Author: "Martin Schovanek"
Version: "1.0"
Last update: "Aug 24, 2009"
Introduction: "In this TS you will develop, deploy, and run a simple J2EE application named ConverterApp. The purpose of ConverterApp is to calculate currency conversions between yen and eurodollars. ConverterApp consists of an enterprise bean, which performs the calculations, and a web client."
Comments: ""

Contents 1 "EJB 3.1 Validation" Test Specification for "NetBeans 6.8" 1.1 Test suite: ConverterApp

Test suite: ConverterApp

Purpose: "purpose description"
Setup: "setup description"

1. "Create the J2EE Application"
   1. "In the IDE, choose File‚ÜíNew Project (Ctrl-Shift-N)."
   2. "From the Enterprise category, select Enterprise Application and click Next."
   3. "Name the project ConverterApp, specify a location for the project and click Next."
   4. "Select the GFv3 server and set the Java EE Version to: Java EE 6 and click Finish."
   • EXPECTED RESULT: "The wizard creates three projects: one for the enterprise application, one for the EJB module, and one for the web module."
2. "Create the ConverterBean Enterprise bean"
   1. "In the Projects window, right-click the ConverterApp-ejb node and choose New > Session Bean."
   2. "In the EJB Name field, type: Converter. In the Package field, type: converter. Set the bean to be stateless and click Finish."
   • EXPECTED RESULT: "The IDE creates ConverterBean.java class. The class is annotated by javax.ejb.Stateless."
3. "Add Business Methods"

??? remove the next 3 steps?

1. 1. "Expand the Enterprise Beans node, right-click the ConverterBean node and choose: Add > Business Method."
   2. "In the dialog box, type: dollarToYen in the Name filed and java.math.BigDecimal in the Return Type field. In the parameters tab, click Add to add a BigDecimal parameter named dollars. Then click OK to add the business method."
   3. "Repeat the steps 1 and 2 to add a business method called: yenToEuro that returns BigDecimal and has one parameter named yen."
   4. "In ConverterBean.java, add the following field declarations right below the class declaration:"

BigDecimal yenRate = new BigDecimal("94.3188");
BigDecimal euroRate = new BigDecimal("0.0075");

1. 1. "In ConverterBean.java, implement the dollarToYen and yenToEuro methods as follows:"

public BigDecimal dollarToYen(BigDecimal dollars) {
BigDecimal result = dollars.multiply(yenRate);
return result.setScale(2, BigDecimal.ROUND_UP);
}
public BigDecimal yenToEuro(BigDecimal yen) {
BigDecimal result = yen.multiply(euroRate);
return result.setScale(2, BigDecimal.ROUND_UP);
}

1. • {{result|EXPECTED RESULT: "The full source code should look like follows: "

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package converter;

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

/**
 *
 * @author tester
 */
@Stateless
public class ConverterBean {

    BigDecimal yenRate = new BigDecimal("121.6000");
    BigDecimal euroRate = new BigDecimal("0.0077");

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

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

1. "Create the Web Client"
   1. "In the Projects window, right-click the ConverterApp-web node and choose: New > Servlet."
   2. "Name the servlet ConverterServlet and place it in a package called: converter. Click Next and then Finish."
   3. "In ConverterBean.java, add the following field declarations right below

the class declaration:"

@EJB
ConverterBean converter;

1. 1. "In the Source Editor, go to the processRequest method and remove the comment symbols that comment out the text between PrintWriter out = response.getWriter(); and out.close();."
   2. "Add the following code in the body of the servlet, right before the: out.println("</body>");:"

out.println("<h1><b><center>Converter</center></b></h1>");
out.println("<hr>");
out.println("<p>Enter an amount to convert:</p>");
out.println("<form method=\"get\">");
out.println("<input type=\"text\" name=\"amount\" size=\"25\">");
out.println("<br>");
out.println("<p>");
out.println("<input type=\"submit\" value=\"Submit\">");
out.println("<input type=\"reset\" value=\"Reset\">");
out.println("</form>");
String amount = request.getParameter("amount");
if (amount != null && amount.length() > 0) {
try {
java.math.BigDecimal d = new java.math.BigDecimal(amount);
out.println("<p>");
out.println("<p>");
out.println(amount + " Dollars are  " + converter.dollarToYen(d) + " Yen.");
out.println("<p>");
out.println(amount + " Yen are " + converter.yenToEuro(d) + " Euro.");
} catch (Exception e) {
Logger.getLogger(getClass().getName()).log(Level.SEVERE, "Cannot execute ConverterBean:\n", e);
}
}

1. 1. "Right click the Editor pane and choose Format"
   • EXPECTED RESULT: "The IDE creates the ConverterServlet.java class. The class is annotated by javax.servlet.anntotion.WebServlet"
2. "Runnig the Web Client"
   1. "In the Projects window, right-click the ConverterApp project node and choose Properties > Run."
   2. "Type /ConverterServlet in the Relative URL field and click OK."
   3. "In the Projects window, right-click the ConverterApp node and choose Run Project."
   • EXPECTED RESULT: "The IDE does all of the following:"

1. • "Starts the application server if it is not already started."
   • "Builds the ConverterApp project and the projects for each of its modules. You can view the build ouputs in the Files window."
   • "Deploys converterapp.ear to the application server."
   • "Opens your default web browser at the following URL: http://localhost:8080/ConverterApp-war/ConverterServlet"

"After entering 100 in the input field and clicking Submit, you should see the output like:"

100 Dollars are 9431.88 Yen.

100 Yen are 0.75 Euro.

• This page was last modified on 5 November 2009, at 17:37.
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