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import threading |
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from pyramid.registry import global_registry |
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class ThreadLocalManager(threading.local): |
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def __init__(self, default=None): |
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# http://code.google.com/p/google-app-engine-django/issues/detail?id=119 |
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# we *must* use a keyword argument for ``default`` here instead |
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# of a positional argument to work around a bug in the |
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# implementation of _threading_local.local in Python, which is |
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# used by GAE instead of _thread.local |
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self.stack = [] |
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self.default = default |
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def push(self, info): |
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self.stack.append(info) |
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set = push # b/c |
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def pop(self): |
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if self.stack: |
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return self.stack.pop() |
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def get(self): |
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try: |
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return self.stack[-1] |
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except IndexError: |
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return self.default() |
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def clear(self): |
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self.stack[:] = [] |
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def defaults(): |
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return {'request': None, 'registry': global_registry} |
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manager = ThreadLocalManager(default=defaults) |
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def get_current_request(): |
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""" |
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Return the currently active request or ``None`` if no request |
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is currently active. |
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This function should be used *extremely sparingly*, usually only |
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in unit testing code. It's almost always usually a mistake to use |
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``get_current_request`` outside a testing context because its |
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usage makes it possible to write code that can be neither easily |
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tested nor scripted. |
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""" |
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return manager.get()['request'] |
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def get_current_registry(context=None): # context required by getSiteManager API |
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""" |
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Return the currently active :term:`application registry` or the |
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global application registry if no request is currently active. |
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|
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This function should be used *extremely sparingly*, usually only |
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in unit testing code. It's almost always usually a mistake to use |
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``get_current_registry`` outside a testing context because its |
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usage makes it possible to write code that can be neither easily |
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tested nor scripted. |
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""" |
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return manager.get()['registry'] |
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class RequestContext(object): |
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def __init__(self, request): |
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self.request = request |
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def begin(self): |
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request = self.request |
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registry = request.registry |
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manager.push({'registry': registry, 'request': request}) |
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return request |
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def end(self): |
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manager.pop() |
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def __enter__(self): |
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return self.begin() |
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def __exit__(self, *args): |
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self.end() |