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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html><head><!--
Copyright (c) 2005 The Apache Software Foundation or its licensors, as applicable.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
-->
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<meta http-equiv="Content-Style-Type" content="text/css">
<title>Tuscany Hello World Web Sample</title><!-- LINK rel="stylesheet" href="ait.css" type="text/css" --><!-- maven --><style type="text/css" media="all">
@import url("../../../../css/maven-base.css");
@import url("../../../../css/maven-theme.css");
@import url("../../../../css/site.css");
</style>
<link rel="stylesheet" href="./css/print.css" type="text/css" media="print"><!-- end maven --></head>
<body>
<h2>Tuscany Hello World Web Sample</h2>
<h3>Overview</h3>
<p>The Tuscany hello world web sample shows using the Tuscany SCA
runtime in a Tomcat environment being accessed from a JSP
page that
implements the classic introductory hello world example.</p>
<h3>Location</h3>
This sample is located in the samples\sca\helloworldweb directory.
<h3>Setup</h3>
Set up your server as described in the <a href="../../../GettingStarted.htm" target="_blank">Tomcat Setup</a>.
If you are not using the pre-configured Tomcat server from the binary distribution, you will need to add <span style="font-weight: bold;">sample-helloworldweb-incubating-M1.war</span> to your tomcat's webapp directory.<br>
<h3>Running</h3>
Once you've started your web server, use your browse to view the
following URL: <a href="http://localhost:8080/sample-helloworldweb/" target="_blank">http://localhost:8080/sample-helloworldweb/</a>
<br>
You should see a form you can supply your name and a submit button.
Once you submit the form the JSP page calls a Java class that
gets the CurrentModuleContext and locates the SCA component to execute
the greeting service. Note, unlike the a J2SE in a Tomcat environment the Tuscany runtime is automatically
initialized and running.
<h3>Results</h3>
<p>The page should be updated with the greeting displayed below
the form.<br>
</p>
<h3>Code Overview</h3>
The source files are physically organized as shown below:<br>
<table style="text-align: left; width: 100%;" border="1" cellpadding="2" cellspacing="2">
<tbody>
<tr>
<td>
<pre>src<br>+---main<br> +---java<br> ¦ +---helloworld<br> ¦ HelloWorldImpl.java<br> ¦ HelloWorldService.java<br> ¦<br> +---resources<br> ¦ sca.module<br> ¦<br> +---webapp<br> ¦ HelloWorldWeb.jsp<br> ¦<br> ¦<br> +---WEB-INF<br> web.xml<br><br></pre>
</td>
</tr>
</tbody>
</table>
<br>
<br>
<p> </p>
<table style="text-align: left; width: 100%; height: 154px;" border="0" cellpadding="2" cellspacing="2">
<tbody>
<tr>
<td style="vertical-align: top;">sca.module</td>
<td>Defines the SCA module and component. Defines for the
HelloWorldServiceComponent component and the Java class that
implements that component</td>
</tr>
<tr>
<td style="vertical-align: top;">HelloWorldService.java</td>
<td>Defines the Java interface implemented by the component.</td>
</tr>
<tr>
<td style="vertical-align: top;">HelloWorldImpl.java</td>
<td>Implements the SCA component. Uses the SCA service
annotation tag on the class to show what SCA interface is being
implemented.</td>
</tr>
<tr>
<td>HelloWorldWeb.jsp</td>
<td>Handles Web form input.. Obtains the module context which was defined by the
sca.module file. From the module context locates the
HelloWorldServiceComponent and then calls the getGreetings
method to invoke the component. and formats returned results.</td>
</tr>
<tr>
<td>web.xml</td>
<td>Standard J2EE web application's web.xml</td>
</tr>
</tbody>
</table>
<br>
</body></html>
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