branches/sca-java-0.99/samples/company-das/readme.html


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<title>Tuscany RDB DAS exposed as an SCA service</title>

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<h1>Tuscany RDB DAS exposed as an SCA service</h1>


<h3>Introduction</h3>

<p>This is a sample SCA service that exposes DAS functionality.</p>
<p>This service would allow you to utilize DAS in a language neutral fashion, consuming existent or adHoc commands.</p>


<h3>Consuming the DAS service</h3>


<p>You should add the dependency on your client project pom file</p>


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&lt;!-- DAS Service --&gt;
&lt;dependency&gt;
   &lt;groupId&gt;org.apache.tuscany.das.samples&lt;/groupId&gt;
   &lt;artifactId&gt;sample-das-service&lt;/artifactId&gt;
   &lt;version&gt;${pom.version}&lt;/version&gt;
&lt;/dependency&gt;
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<br>
<p>In order to consume the service, you would have to create a SCDL that references it, see sample below:</p>

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&lt;composite xmlns="http://www.osoa.org/xmlns/sca/1.0" name="DASServiceComposite"&gt;
  &lt;component name="DASServiceComponent"&gt;
     &lt;implementation.composite name="DASServiceComposite" jarLocation="lib/sample-das-service-1.0-incubator-SNAPSHOT.jar"/&gt;
  &lt;/component&gt;
&lt;/composite&gt;
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<h3>Sample Architecture</h3>

<p>This service utilizes the following Interface as its definition:</p>


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public interface DASService {

    public void configureService(InputStream configStream) throws DASServiceException;

    public DataObject executeCommand(String commandName, Vector commandArguments) throws DASServiceException;

    public DataObject execute(String adHocQuery, Vector commandArguments) throws DASServiceException;

    public void applyChanges(DataObject graphRoot) throws DASServiceException;

}
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