def _reset_output(self):
previous_output_file = self.output_file
output_path = os.path.join(self.path, datetime.utcnow().isoformat())
# using synchronous open to avoid race condition
self.output_file = wrap(open(output_path, mode='bw'), loop=self.loop)
if previous_output_file:
self.loop.create_task(self._close_output(previous_output_file))
def _open(file, *args, mode="r", loop=None, executor=None, **kwargs):
"""Wrapping wrapped types that are instantiated in a concurrent generator makes my head hurt; punch the duck!"""
if loop is None:
loop = asyncio.get_event_loop()
partial_function = partial(sync_open, file, *args, mode=mode, **kwargs)
file_descriptor = yield from loop.run_in_executor(executor,
partial_function)
obj = wrap(file_descriptor, loop=loop, executor=executor)
# DUCK PUNCH: close()
obj._original_close = getattr(obj, "close", None)
obj.close = MethodType(duck_punch_close, obj)
global _OBJECTS # pylint: disable=global-statement
_OBJECTS.append(obj)
return obj
def _open(file, *args, mode="r", loop=None, executor=None, **kwargs):
"""Wrapping wrapped types that are instantiated in a concurrent generator makes my head hurt; punch the duck!"""
if loop is None:
loop = asyncio.get_event_loop()
partial_function = partial(sync_open, file, *args, mode=mode, **kwargs)
file_descriptior = yield from loop.run_in_executor(executor, partial_function)
baseio = wrap(file_descriptior, loop=loop, executor=executor)
# DUCK PUNCH: name
baseio.__setattr__("name", str(file))
# DUCK PUNCH: __del__()
baseio.__del__ = MethodType(duck_punch___del__, baseio)
# DUCK PUNCH: close()
baseio._original_close = baseio.close
baseio.close = MethodType(duck_punch_close, baseio)
return baseio
def test_unsupported_wrap():
"""A type error should be raised when wrapping something unsupported."""
with pytest.raises(TypeError):
wrap(int)
async def stream_to_queue(file, write_queue):
"""Function to save streams to queue"""
loop = asyncio.get_event_loop()
async for message in nbt.wrap(file, loop=loop): # non blocking io read
await write_queue.put(message.encode())
def test_unsupported_wrap():
"""A type error should be raised when wrapping something unsupported."""
with pytest.raises(TypeError):
wrap(int)
async def test_plugin_dispatcher(fs):
with open('test', 'w') as f:
wrapped = threadpool.wrap(f)
assert isinstance(f, fake_filesystem.FakeFileWrapper)
assert isinstance(wrapped, base.AsyncBase)
