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<h1>Applet</h1>
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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>
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<div class="sect1">
<h2 id="_calculator">Calculator</h2>
<div class="sectionbody">
<div class="listingblock">
<div class="content">
<pre class="highlight"><code class="language-java" data-lang="java">package org.superbiz.applet;
import javax.ejb.Remote;
@Remote
public interface Calculator {
public double add(double x, double y);
}</code></pre>
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<div class="sect1">
<h2 id="_calculatorapplet">CalculatorApplet</h2>
<div class="sectionbody">
<div class="listingblock">
<div class="content">
<pre class="highlight"><code class="language-java" data-lang="java">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>
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<div class="sect1">
<h2 id="_calculatorimpl">CalculatorImpl</h2>
<div class="sectionbody">
<div class="listingblock">
<div class="content">
<pre class="highlight"><code class="language-java" data-lang="java">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>
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<div class="sect1">
<h2 id="_web_xml">web.xml</h2>
<div class="sectionbody">
<div class="listingblock">
<div class="content">
<pre class="highlight"><code class="language-xml" data-lang="xml">&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>
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<div class="sect1">
<h2 id="_jndilookuptest">JNDILookupTest</h2>
<div class="sectionbody">
<div class="listingblock">
<div class="content">
<pre class="highlight"><code class="language-java" data-lang="java">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>
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