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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. -->
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HelloWorld</title><!-- LINK rel="stylesheet" href="ait.css" type="text/css" -->
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<body><h2>Tuscany
Hello World Sample</h2>
<h3>Overview</h3>
<p>The Tuscany helloworld sample shows using the Tuscany SCA
runtime in a J2SE environment loading a component that
implements the classic introductory hello world example.</p>
<h3>Location</h3>This
sample is located in the samples\sca\helloworld directory.<br><br>
<h3>Setup</h3>This sample depends on the Tuscany runtime and the sample jar,
<span style="font-weight: bold;">
sample-helloworld-incubating-M1.jar
</span>
, both of these must be available on the classpath to run the sample.
<ol>
</ol>
<h3>Running</h3>
In the directory samples/sca/helloworld use the JDK 1.5 java command to run the class helloworld.HelloWorldClient
<pre>Linux: java -cp ../../../lib/tuscany-runtime-incubating-M1.jar:target/sample-helloworld-incubating-M1.jar helloworld.HelloWorldClient</pre>
<pre>Windows: java -cp ../../../lib/tuscany-runtime-incubating-M1.jar;target/sample-helloworld-incubating-M1.jar helloworld.HelloWorldClient</pre>
<h3>Results</h3>
<p>The sample when run should simply display to the standard
output:<br> <code>Hello World</code></p>
<h3>Code Overview</h3>
The source files are physically organized as shown below:
<table style="text-align: left; width: 100%;" border="1" cellpadding="2" cellspacing="2"> <tbody> <tr><td>src<br>+---main<br> +---java<br> ¦ +---helloworld<br> ¦ HelloWorldClient.java<br> ¦ HelloWorldImpl.java<br> ¦ HelloWorldService.java<br> ¦<br> +---resources<br> sca.module</td></tr></tbody></table>
<br>
<table style="text-align: left; width: 879px; 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 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 style="vertical-align: top;">HelloWorldClient.java</td>
<td>Creates a Tuscany runtime and starts it. 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.</td>
</tr> </tbody></table><br></body></html>
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