Argument store added to updateEntityProperties.
This argument determines if an entity should be stored in the data model after its properties are updated.
It may be useful, for example, along with tasks (Task Queue API). One may want to make some modifications to an entity during execution of a task, but the developer is sure that at least one new task, which also wants to modify the entity, will be queued, so he or she can just update the entity without saving the changes to the data model, set the entity in memcache and the following task (which is to be executed very shortly) is to retrive the current entity from the memcache (without any expensive calls to the actual data model).
#!/usr/bin/python2.5
#
# Copyright 2008 the Melange authors.
#
# 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.
"""Basic system information functions.
"""
__authors__ = [
'"Todd Larsen" <tlarsen@google.com>',
]
import os
import settings
def getAppVersion():
"""Returns the Google App Engine "version" of the running instance.
"""
return os.environ.get('CURRENT_VERSION_ID')
def getMelangeVersion():
"""Returns the Melange part of the GAE version.
"""
return getAppVersion().split('.', 1)[0]
def isLocal():
"""Returns True if Melange application is running locally.
"Local mode" is currently determined from settings.DEBUG but may become
more sophisticated in the future.
"""
return settings.DEBUG
def isDebug():
"""Returns True if Melange application is running in "debug mode".
"Debug mode" is currently enabled if running locally or if the
current Melange version is 'devvin'.
"""
return isLocal() or getMelangeVersion() == 'devvin'