App Engine SDK DevServer只读模式？ [英] App Engine SDK DevServer Read-Only Mode?

问题描述

有没有办法以只读模式运行应用程序引擎开发服务器，以便模拟Google的计划维护，将数据存储设置为只读模式？

Is there a way to run the app engine dev server in read-only mode in order to simulate the scheduled maintenance by Google which puts the datastore into read-only mode?

定期维护期间优雅地降级

推荐答案

我希望有一个复选框可以使数据存储为只读。这种黑客似乎正在做我所需要的。将以下代码放入您的主要处理程序中：

I wish there was a checkbox that would make the datastore read-only. This hack seems to do what I need. Put the following in your main handler:

from google.appengine.runtime.apiproxy_errors import CapabilityDisabledError
from google.appengine.api import apiproxy_stub_map

def make_datastore_readonly():
  """Throw ReadOnlyError on put and delete operations."""
  def hook(service, call, request, response):
    assert(service == 'datastore_v3')
    if call in ('Put', 'Delete'):
      raise CapabilityDisabledError('Datastore is in read-only mode')
  apiproxy_stub_map.apiproxy.GetPreCallHooks().Push('readonly_datastore', hook, 'datastore_v3')

def main():
  make_datastore_readonly()

这里发现：
http://groups.google.com/group/google-appengine/msg/51db9d51401715ca

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