Seam provides a convenient method of remotely accessing components from a web page, using AJAX (Asynchronous Javascript and XML). The framework for this functionality is provided with almost no up-front development effort - your components only require simple annotating to become accessible via AJAX. This chapter describes the steps required to build an AJAX-enabled web page, then goes on to explain the features of the Seam Remoting framework in more detail.
To use remoting, the Seam Resource servlet must first be configured in your web.xml file:
<servlet>
<servlet-name>Seam Resource Servlet</servlet-name>
<servlet-class>org.jboss.seam.servlet.ResourceServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>Seam Resource Servlet</servlet-name>
<url-pattern>/seam/resource/*</url-pattern>
</servlet-mapping>
The next step is to import the necessary Javascript into your web page. There are a minimum of two scripts that must be imported. The first one contains all the client-side framework code that enables remoting functionality:
<script type="text/javascript" src="seam/resource/remoting/resource/remote.js"></script>
The second script contains the stubs and type definitions for the components you wish to call. It is generated dynamically based on the local interface of your components, and includes type definitions for all of the classes that can be used to call the remotable methods of the interface. The name of the script reflects the name of your component. For example, if you have a stateless session bean annotated with @Name("customerAction"), then your script tag should look like this:
<script type="text/javascript" src="seam/resource/remoting/interface.js?customerAction">
</script>
If you wish to access more than one component from the same page, then include them all as parameters of your script tag:
<script type="text/javascript"
src="seam/resource/remoting/interface.js?customerAction&accountAction">
</script>
