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import functools
def delegate_to_executor(*attrs):
def cls_builder(cls):
for attr_name in attrs:
setattr(cls, attr_name, _make_delegate_method(attr_name))
return cls
return cls_builder
def proxy_method_directly(*attrs):
def cls_builder(cls):
for attr_name in attrs:
setattr(cls, attr_name, _make_proxy_method(attr_name))
return cls
return cls_builder
def proxy_property_directly(*attrs):
def cls_builder(cls):
for attr_name in attrs:
setattr(cls, attr_name, _make_proxy_property(attr_name))
return cls
return cls_builder
def cond_delegate_to_executor(*attrs):
def cls_builder(cls):
for attr_name in attrs:
setattr(cls, attr_name, _make_cond_delegate_method(attr_name))
return cls
return cls_builder
def _make_delegate_method(attr_name):
async def method(self, *args, **kwargs):
cb = functools.partial(getattr(self._file, attr_name), *args, **kwargs)
return await self._loop.run_in_executor(self._executor, cb)
return method
def _make_proxy_method(attr_name):
def method(self, *args, **kwargs):
return getattr(self._file, attr_name)(*args, **kwargs)
return method
def _make_proxy_property(attr_name):
def proxy_property(self):
return getattr(self._file, attr_name)
return property(proxy_property)
def _make_cond_delegate_method(attr_name):
"""For spooled temp files, delegate only if rolled to file object"""
async def method(self, *args, **kwargs):
if self._file._rolled:
cb = functools.partial(getattr(self._file, attr_name), *args, **kwargs)
return await self._loop.run_in_executor(self._executor, cb)
else:
return getattr(self._file, attr_name)(*args, **kwargs)
return method
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