GAE integration with BlazeDS in Eclipse
Let me write down the steps for integrating BlazeDS with Google App Engine in Eclipse. Before that here is the list of things you will need.
1)Eclipse 3.3(I use this one, any other version should also be fine provided you have other plugins)
2)Flex Builder 3 plugin for eclipse
3)BlazeDS files(JARs and XMLs)
4)Google App Engine plugin for eclipse
Ok lets get started...
Create a Google App Engine Project. Enable Flex Nature for it.
Put project_name/war folder for Root Folder in Flex Builder configuration for the project.
Root URL : The URL where the Google App is running.
Root Context : Leave it blank.
Make sure you are running the server and validate the configuration.
Copy the XMLs from BlazeDS Project into WEB-INF/flex folder, heres the list of them
Copy the JARs into WEB-INF/lib folder, heres the list.
Add xalan.jar also as I had faced the servlet initialisation problem without it.
MessageBrokerServlet failed to initialize due to runtime exception: Exception: java.lang.RuntimeException: XPathFactory#newInstance() failed to create an XPathFactory for the default object model:
to the appengine-web.xml
Add AMF Servlet to the web.xml
Make sure you have war/classes/META-INF/jdo-config.xml
Disable JMX by making the value false in services-config.xml
Disable the system redeploy by making the value 'false' in services-config.xml
Enabling this creates a thread when you redeploy the application, which is not allowed by GAE
These steps are enough to have the Application running.