main.py

#!/usr/bin/env python
#
# Title: observer pattern implementation for App Engine
# Author: Domenico Pontari
# Email: fairsayan@gmail.com
# Website: http://it.linkedin.com/in/pontari/
#
# Rif about observer design pattern: http://it.wikipedia.org/wiki/Observer_pattern
# Basic idea: http://stackoverflow.com/questions/1904351/python-observer-pattern-examples-tips?answertab=votes#tab-top
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
from google.appengine.ext import webapp
from google.appengine.ext.webapp.util import run_wsgi_app
import logging
import pickle
import Caller
import Called

class ExampleController(webapp.RequestHandler):
    def get(self):
      self.response.out.write('Check the logs to see what happened...')
      caller = Caller.Caller()

class ExampleWorker(webapp.RequestHandler):
    def post(self):
      called = pickle.loads(str(self.request.get('called')))
      called.queue()

ExampleCtrl = webapp.WSGIApplication([('/', ExampleController), ('/workers/example', ExampleWorker)], debug=True)

def main():
    run_wsgi_app(ExampleCtrl)

if __name__ == "__main__":
    main()