User Guide

132 Chapter 7: Using Flash Remoting for Java
Calling servlets and JSPs from Flash
The following sections describe how to get a reference to a servlet or a JSP defined as a servlet in a
web.xml file, and call the servlet or JSP.
Note: Servlets are supported on Servlet 2.2- and Servlet 2.3-compliant application servers. JSPs
are supported only on Servlet 2.3-compliant application servers.
Coding a servlet to use with Flash Remoting
Although you can use any servlet with Flash Remoting, Flash Remoting provides a FlashServlet
object that creates a subclass of the Servlet API and provides a better API than the Request scope.
In order to use the FlashServlet, your servlet must be in the Flash Remoting web application. In
it, you must create a subclass of the flashgateway.adapter.java.FlashServlet class and implement
the following abstract method:
public Object service(ServletRequest req, ServletResponse resp, List
arguments);
Getting a reference to a web application in ActionScript
Before calling a servlet or a JSP defined as a servlet, you must get a reference to the context root of
the web application that contains the servlet or JSP.
To get a reference to a web application that contains a servlet or JSP:
1. Import the Flash Remoting files:
import mx.remoting.Service;
2. Connect to the Flash Remoting gateway and get a reference to the context root of the web
application that contains the servlet or JSP:
servletService = new Service(
"http://localhost/flashservices/gateway"),
null,
"mycontextroot",
null,
null);
Note: There are several other ways to specify the gateway URL. For more information, see
Chapter 2, “Configuring Flash Remoting,” on page 36.
The third parameter of the Service constructor must be the context root of the web
application that contains the servlet or JSP.