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<H3><A name="SCAJavaimplementation.widget-Introduction"></A>Introduction</H3>
<P>The Tuscany Widget Implementation extends the SCA programing model to HTML and/or Web 2.0 client applications.</P>
<H3><A name="SCAJavaimplementation.widget-UsingImplementation.WidgettomodelyourWeb2.0component"></A>Using Implementation.Widget to model your Web 2.0 component</H3>
<P>This component type allows you to model your HTML and/or Web 2.0 as an SCA component, the implementation artifact would be html resource that represents the application, and you can define SCA References, that would be wired to server side services.</P>
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<composite xmlns=<SPAN class="code-quote">"http:<SPAN class="code-comment">//www.osoa.org/xmlns/sca/1.0"</SPAN>
</SPAN> xmlns:t=<SPAN class="code-quote">"http:<SPAN class="code-comment">//tuscany.apache.org/xmlns/sca/1.0"</SPAN>
</SPAN> targetNamespace=<SPAN class="code-quote">"http:<SPAN class="code-comment">//store"</SPAN>
</SPAN> name=<SPAN class="code-quote">"store"</SPAN>>
<component name=<SPAN class="code-quote">"store"</SPAN>>
<t:implementation.widget location=<SPAN class="code-quote">"contents/store.html"</SPAN>/>
<service name=<SPAN class="code-quote">"Widget"</SPAN>>
<t:binding.http/>
</service>
<reference name=<SPAN class="code-quote">"catalog"</SPAN> target=<SPAN class="code-quote">"Catalog"</SPAN>>
<t:binding.jsonrpc/>
</reference>
<reference name=<SPAN class="code-quote">"shoppingCart"</SPAN> target=<SPAN class="code-quote">"ShoppingCart"</SPAN>>
<t:binding.atom/>
</reference>
</component>
.....
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</PRE>
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<H3><A name="SCAJavaimplementation.widget-DefiningreferencesinHTMLresources"></A>Defining references in HTML resources</H3>
<P>The widget implementation introduces SCA annotations to JavaScript code using the syntax below. These references will get properly introspected by the implementation.widget and wired to the proper server side services.</P>
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<SPAN class="code-comment">//@Reference
</SPAN><SPAN class="code-keyword">var</SPAN> catalog = <SPAN class="code-keyword">new</SPAN> Reference(<SPAN class="code-quote">"catalog"</SPAN>);
<SPAN class="code-comment">//@Reference
</SPAN><SPAN class="code-keyword">var</SPAN> shoppingCart = <SPAN class="code-keyword">new</SPAN> Reference(<SPAN class="code-quote">"shoppingCart"</SPAN>);
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<H3><A name="SCAJavaimplementation.widget-IncludinggeneratedJavaScriptclientproxy"></A>Including generated JavaScript client proxy</H3>
<P>The client application will need to include a generated JavaScript that will contain the necessary client proxy used to access the server side services. The name of the generated JavaScript is the same as the HTML resource being specified as the implementation artifact.</P>
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<!-- one js include per sca component -->
<script type=<SPAN class="code-quote">"text/javascript"</SPAN> src=<SPAN class="code-quote">"store.js"</SPAN>></script>
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<H3><A name="SCAJavaimplementation.widget-Supportedbindingtypes"></A>Supported binding types</H3>
<P>Currently, you can define references to remote services using the following bindings :</P>
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<LI><A href="sca-java-bindingatom.html" title="SCA Java binding.atom">ATOM</A></LI>
<LI><A href="sca-java-bindingjsonrpc.html" title="SCA Java binding.jsonrpc">JSON-RPC</A></LI>
<LI><A href="sca-java-bindinghttp.html" title="SCA Java binding.http">HTTP</A></LI>
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<H3><A name="SCAJavaimplementation.widget-References"></A>References</H3>
<P><A href="http://incubator.apache.org/tuscany/getting-started-with-tuscany.html" class="external-link" rel="nofollow">http://incubator.apache.org/tuscany/getting-started-with-tuscany.html</A></P>
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