This demonstrates a simple Queue mechanism you can use in App Engine applications. It is based on code taken from Jaikuengine and then modified for a more generic purpose. Creating tasks is as simple as:

task_create('test', '1', ['test argument 1'])

Where test is the name of the mapping in api.py, 1 is a unique identifier for the task and [‘test argument 1’] is a list of arguments to pass to the test method.

Once you have a set of tasks in the queue you process them like so:

task_process()

The main.py and api.py files contains a reference implementation. If you run the application you can visit localhost:8080/seed to create a series of tasks and then localhost:8080 to process a task at a time. In a real application you could set up an external cron to ping an end point to process items from the queue.

• Jaikuengine has a test suite, some of which can be reused here. But I need to write a few test of my own to be sure everything is working.
• The whole codebase is in need of good comments to explain what’s going on.
• Some variables have meaningless one or two letter names. This is a left over from the Jaikuengine code and just needs a bit of refactoring.

Copyright 2009 Gareth Rushgrove

Licensed under the Apache License, Version 2.0 (the "License");
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