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<h1>Applet

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<p><em>Help us document this example! Click the blue pencil icon in the upper right to edit this page.</em></p>

<h2>Calculator</h2>

<pre><code>package org.superbiz.applet;

import javax.ejb.Remote;

@Remote
public interface Calculator {
    public double add(double x, double y);
}
</code></pre>

<h2>CalculatorApplet</h2>

<pre><code>package org.superbiz.applet;

import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import javax.rmi.PortableRemoteObject;
import javax.swing.JApplet;
import javax.swing.JButton;
import javax.swing.JLabel;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.SwingUtilities;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Properties;

public class CalculatorApplet extends JApplet {
    JTextArea area;

    JTextField field1;
    JTextField field2;
    JLabel label1;
    JLabel label2;
    JButton button;
    JLabel label3;
    Context ctx;

    public void init() {
        try {
            SwingUtilities.invokeAndWait(new Runnable() {
                public void run() {
                    createUI();
                }
            });
        } catch (Exception e) {
            System.err.println("createGUI didn't successfully complete");
        }
    }

    private void createUI() {
        field1 = new JTextField();
        field2 = new JTextField();
        label1 = new JLabel("Enter first number");
        label2 = new JLabel("Enter second number");
        label3 = new JLabel("RESULT=");
        button = new JButton("Add");

        setLayout(new GridLayout(3, 2));
        add(label1);
        add(field1);
        add(label2);
        add(field2);
        add(button);
        add(label3);
        Properties props = new Properties();
        props.put(Context.INITIAL_CONTEXT_FACTORY,
                "org.apache.openejb.client.RemoteInitialContextFactory");
        props.put(Context.PROVIDER_URL, "http://127.0.0.1:8080/applet/ejb");
        try {
            ctx = new InitialContext(props);
        } catch (NamingException e) {
            throw new RuntimeException(e);
        }
        button.addActionListener(new ActionListener() {

            public void actionPerformed(ActionEvent e) {

                try {
                    final Object ref = ctx.lookup("CalculatorImplRemote");
                    Calculator calc = (Calculator) PortableRemoteObject.narrow(
                            ref, Calculator.class);
                    String text1 = field1.getText();
                    String text2 = field2.getText();
                    int num1 = Integer.parseInt(text1);
                    int num2 = Integer.parseInt(text2);
                    double result = calc.add(num1, num2);
                    label3.setText("RESULT=" + result);
                } catch (NamingException ex) {
                    throw new RuntimeException(ex);
                }
            }
        });
    }
}
</code></pre>

<h2>CalculatorImpl</h2>

<pre><code>package org.superbiz.applet;

import javax.ejb.Stateless;

@Stateless
public class CalculatorImpl implements Calculator {

    public double add(double x, double y) {
        return x + y;
    }
}
</code></pre>

<h2>web.xml</h2>

<pre><code>&lt;web-app&gt;
  &lt;servlet&gt;
    &lt;servlet-name&gt;ServerServlet&lt;/servlet-name&gt;
    &lt;servlet-class&gt;org.apache.openejb.server.httpd.ServerServlet&lt;/servlet-class&gt;
  &lt;/servlet&gt;
  &lt;servlet-mapping&gt;
    &lt;servlet-name&gt;ServerServlet&lt;/servlet-name&gt;
    &lt;url-pattern&gt;/ejb/*&lt;/url-pattern&gt;
  &lt;/servlet-mapping&gt;
&lt;/web-app&gt;
</code></pre>

<h2>JNDILookupTest</h2>

<pre><code>package org.superbiz;

import org.junit.Assert;
import org.junit.Test;
import org.superbiz.applet.Calculator;

import javax.naming.Context;
import javax.naming.InitialContext;
import javax.rmi.PortableRemoteObject;
import java.util.Properties;


public class JNDILookupTest {

    @Test
    public void test() {
        Properties props = new Properties();
        props.put(Context.INITIAL_CONTEXT_FACTORY, "org.apache.openejb.client.RemoteInitialContextFactory");
        props.put(Context.PROVIDER_URL, "http://127.0.0.1:8080/tomee/ejb");
        try {
            Context ctx = new InitialContext(props);
            System.out.println("Found context " + ctx);
            final Object ref = ctx.lookup("CalculatorImplRemote");
            Calculator calc = (Calculator) PortableRemoteObject.narrow(ref, Calculator.class);
            double result = calc.add(10, 30);
            Assert.assertEquals(40, result, 0.5);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}
</code></pre>


<div class="page-header">&nbsp;</div>
<h4>APIs Used</h4>
<ul><li><a href="http://docs.oracle.com/javaee/6/api/javax/ejb/Remote.html">javax.ejb.Remote</a></li>
<li><a href="http://docs.oracle.com/javaee/6/api/javax/ejb/Stateless.html">javax.ejb.Stateless</a></li>
<li><a href="http://docs.oracle.com/javaee/6/api/javax/naming/Context.html">javax.naming.Context</a></li>
<li><a href="http://docs.oracle.com/javaee/6/api/javax/naming/InitialContext.html">javax.naming.InitialContext</a></li>
<li><a href="http://docs.oracle.com/javaee/6/api/javax/naming/NamingException.html">javax.naming.NamingException</a></li>
<li><a href="http://docs.oracle.com/javaee/6/api/javax/rmi/PortableRemoteObject.html">javax.rmi.PortableRemoteObject</a></li>
</ul>

<h3>Source</h3>
  <ul>
      <li>Apache <a href="http://svn.apache.org/repos/asf/tomee/tomee//examples/applet">applet</a></li>
      <li>Github <a href="https://github.com/apache/tomee/tree//examples/applet">applet</a></li>
  </ul>
<pre>
svn co http://svn.apache.org/repos/asf/tomee/tomee//examples/applet
cd applet
mvn clean install
</pre>


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