Folks,
We have a long-running process that I've been trying to make into a
backend, thus far to no avail. So any help would be much appreciated.
app.yaml
======================
application: app-name
version: api-storage-transition
runtime: python27
api_version: 1
threadsafe: yes
handlers:
- url: /task/(.*)
script: tasks.app
login: admin
- url: /migration/ids.*
script: migration.app
libraries:
- name: webapp2
version: "2.5.1"
- name: pycrypto
version: "2.6"
inbound_services:
- mail
====
backends.yaml
===========
backends:
- name: migration
instances: 1
options: public
============
migration.py
===========
import webapp2
import logging
from google.appengine.api.backends import get_instance
class ModelMigrationHanlder(webapp2.RequestHandler):
"""One-time migration handler for Model.id -> Model.model_id"""
models = ['model1', 'model2', 'model3'']
def get(self):
if get_instance() is not None:
logging.info('Starting model schema migration')
for m in self.models:
logging.info('fetching model %s records' % m)
recs = self.fetch_records(m)
logging.info('Migrating %s records' % len(recs))
else:
logging.info('Not running as a backend')
....
I send a request to http://migration.<app_name>.appspot.com/migration/ids
and within ~30 seconds it 500's witha DeadlineExceededError. Also, in spite
of what the docs for backends.get_instance() say, it returns an instance ID
even if it's not a backend (it's supposed to return None).
Again, any pointers are much appreciated.
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