sca-java-1.x/tags/java-stable-20060304/samples/helloworld/helloworldweb/readme.htm


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    <title>Tuscany Hello World Web Sample</title><!-- LINK rel="stylesheet" href="ait.css" type="text/css" --></head>

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<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&nbsp;that
    implements the classic introductory hello world example. </p>


<h3>Setup</h3>Set up your server as described in the <a href="http://wiki.apache.org/ws/Tuscany/TomcatIntegration" target="_blank">Tomcat
    Setup</a>. &nbsp;If you are not configuring with the acceptance test the server, you will need to add <span
        style="font-weight: bold;">helloworldWeb-SNAPSHOT.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/helloworldWeb-SNAPSHOT/" target="_blank">http://localhost:8080/helloworldWeb-SNAPSHOT/</a>
<br>

You should see a form you can supply your name and a submit button.
&nbsp;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. &nbsp;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>+---main<br>&brvbar;   +---java<br>&brvbar;       &brvbar;   sca.module<br>&brvbar;       &brvbar;
                    <br>&brvbar;       +---org<br>&brvbar;           +---apache<br>&brvbar;               +---tuscany
                    <br>&brvbar;                   +---samples<br>&brvbar;                       +---helloworldweb
                    <br>&brvbar;                               HelloWorldService.java<br>&brvbar;
                    HelloWorldServiceComponentImpl.java<br>&brvbar;<br>+---webapp<br>    &brvbar;   HelloWorldWeb.jsp
                    <br>    &brvbar;<br> +---WEB-INF<br> web.xml<br></pre>
            </td>
        </tr>
    </tbody>
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<p>&nbsp;</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;">HelloWorldServiceComponentImpl.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&nbsp; the getGreetings
                method to invoke the component.&nbsp;and formats &nbsp;returned&nbsp;results.</td>
        </tr>
        <tr>
            <td>web.xml</td>
            <td>Standard J2EE web application's web.xml</td>
        </tr>

    </tbody>
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