Success! General Interface and Google App Engine

It's been painful, but I finally got a General Interface front end to display data from a custom Google App Engine service. I had previously gotten Google App Engine to return data in JSON format via an HTTP Get, and General Interface to read that data from a stub file and display it, but I hadn't been able to get GI to successfully source the data from the service. Until now.

The trick is apparently in the rules file: it needs to have an input/request node. I added the following XML to the rules file right before the output node (I couldn't figure out how to add the node using the XML Mapping Utility):

<record jsxid="x37650" jsxtext="Input (request)" type="I" jsxopen="1"/>

Now when I open the rules file in the XML Mapping Utility it looks like this:

I got the idea for the input node from the the Yahoo Travel demo posted on the TIBCO Community site. The GI documentation is in bad shape to be missing such basic information. I hope developing with GI gets easier.

Note that I haven't deployed the GAE application yet; I'm just going against the local development server.