def __init__(self, parameters):
"""
Instantiates a new backend. Please note that this is called also
for disabled backends. Those are not initialized, so you might
want to check out the initialize() function.
"""
if self.KEY_DEFAULT_BACKEND not in parameters:
# if it's not specified, then this is the default backend
#(for retro-compatibility with the GTG 0.2 series)
parameters[self.KEY_DEFAULT_BACKEND] = True
# default backends should get all the tasks
if parameters[self.KEY_DEFAULT_BACKEND] or \
(not self.KEY_ATTACHED_TAGS in parameters and
self._general_description[self.BACKEND_TYPE]
== self.TYPE_READWRITE):
parameters[self.KEY_ATTACHED_TAGS] = [self.ALLTASKS_TAG]
self._parameters = parameters
self._signal_manager = BackendSignals()
self._is_initialized = False
# if debugging mode is enabled, tasks should be saved as soon as
# they're marked as modified. If in normal mode, we prefer speed over
# easier debugging.
if Log.is_debugging_mode():
self.timer_timestep = 5
else:
self.timer_timestep = 1
self.to_set_timer = None
self.please_quit = False
self.cancellation_point = lambda: _cancellation_point(lambda: self.
please_quit)
self.to_set = deque()
self.to_remove = deque()
def __init__(self, parameters):
"""
Instantiates a new backend. Please note that this is called also
for disabled backends. Those are not initialized, so you might
want to check out the initialize() function.
"""
if self.KEY_DEFAULT_BACKEND not in parameters:
# if it's not specified, then this is the default backend
#(for retro-compatibility with the GTG 0.2 series)
parameters[self.KEY_DEFAULT_BACKEND] = True
# default backends should get all the tasks
if parameters[self.KEY_DEFAULT_BACKEND] or \
(not self.KEY_ATTACHED_TAGS in parameters and
self._general_description[self.BACKEND_TYPE]
== self.TYPE_READWRITE):
parameters[self.KEY_ATTACHED_TAGS] = [self.ALLTASKS_TAG]
self._parameters = parameters
self._signal_manager = BackendSignals()
self._is_initialized = False
# if debugging mode is enabled, tasks should be saved as soon as
# they're marked as modified. If in normal mode, we prefer speed over
# easier debugging.
if Log.is_debugging_mode():
self.timer_timestep = 5
else:
self.timer_timestep = 1
self.to_set_timer = None
self.please_quit = False
self.cancellation_point = lambda: _cancellation_point(
lambda: self.please_quit)
self.to_set = deque()
self.to_remove = deque()
def test_interruptible_decorator(self):
""" Tests for the @interruptible decorator. """
thread = Thread(target=self.never_ending, args=(
lambda: _cancellation_point(lambda: self.quit_condition),))
thread.start()
# Wait until thread comes to live
self.thread_started.wait()
# Ask to it to quit within 20ms
self.quit_condition = True
time.sleep(0.02)
# Thread is finished
self.assertFalse(thread.is_alive())
def test_interruptible_decorator(self):
""" Tests for the @interruptible decorator. """
cancellation_point = lambda: _cancellation_point(
lambda: self.quit_condition)
thread = Thread(target=self.never_ending, args=(cancellation_point,))
thread.start()
# Wait until thread comes to live
self.thread_started.wait()
# Ask to it to quit within 20ms
self.quit_condition = True
time.sleep(0.02)
# Thread is finished
self.assertFalse(thread.is_alive())
def test_interruptible_decorator(self):
""" Tests for the @interruptible decorator. """
self.quit_condition = False
cancellation_point = lambda: _cancellation_point(
lambda: self.quit_condition)
self.thread_started = Event()
@interruptible
def never_ending(cancellation_point):
self.thread_started.set()
while True:
time.sleep(0.1)
cancellation_point()
thread = Thread(target=never_ending, args=(cancellation_point, ))
thread.start()
self.thread_started.wait()
self.quit_condition = True
countdown = 10
while thread.is_alive() and countdown > 0:
time.sleep(0.1)
countdown -= 1
self.assertFalse(thread.is_alive())
