def add_done_callback(self, fn):
""" add_done_callback(fn)
Attaches the callable fn to the future. fn will be called, with
the future as its only argument, when the future is cancelled or
finishes running.
Added callables are called in the order that they were added. If
the callable raises a Exception subclass, it will be logged and
ignored. If the callable raises a BaseException subclass, the
behavior is undefined.
If the future has already completed or been cancelled, fn will be
called immediately.
"""
# Check
if not hasattr(fn, '__call__'):
raise ValueError('add_done_callback expects a callable.')
# Add
if self.done():
yoton.call_later(fn, 0, self)
else:
self._callbacks.append(fn)
def add_done_callback(self, fn):
""" add_done_callback(fn)
Attaches the callable fn to the future. fn will be called, with
the future as its only argument, when the future is cancelled or
finishes running.
Added callables are called in the order that they were added. If
the callable raises a Exception subclass, it will be logged and
ignored. If the callable raises a BaseException subclass, the
behavior is undefined.
If the future has already completed or been cancelled, fn will be
called immediately.
"""
# Check
if not hasattr(fn, '__call__'):
raise ValueError('add_done_callback expects a callable.')
# Add
if self.done():
yoton.call_later(fn, 0, self)
else:
self._callbacks.append(fn)
def set_result(self, result):
""" set_result(result)
Sets the result of the work associated with the Future to result.
This method should only be used by Executor implementations and
unit tests.
"""
# Set result if indeed in running state
if self._status == 1:
self._result = result
self._status = 4
for fn in self._callbacks:
yoton.call_later(fn, 0, self)
def set_result(self, result):
""" set_result(result)
Sets the result of the work associated with the Future to result.
This method should only be used by Executor implementations and
unit tests.
"""
# Set result if indeed in running state
if self._status == 1:
self._result = result
self._status = 4
for fn in self._callbacks:
yoton.call_later(fn, 0, self)
def set_exception(self, exception):
""" set_exception(exception)
Sets the result of the work associated with the Future to the
Exception exception. This method should only be used by Executor
implementations and unit tests.
"""
# Check
if isinstance(exception, basestring):
exception = Exception(exception)
if not isinstance(exception, Exception):
raise ValueError('exception must be an Exception instance.')
# Set result if indeed in running state
if self._status == 1:
self._result = exception
self._status = 3
for fn in self._callbacks:
yoton.call_later(fn, 0, self)
def set_exception(self, exception):
""" set_exception(exception)
Sets the result of the work associated with the Future to the
Exception exception. This method should only be used by Executor
implementations and unit tests.
"""
# Check
if isinstance(exception, basestring):
exception = Exception(exception)
if not isinstance(exception, Exception):
raise ValueError('exception must be an Exception instance.')
# Set result if indeed in running state
if self._status == 1:
self._result = exception
self._status = 3
for fn in self._callbacks:
yoton.call_later(fn, 0, self)
def cancel(self):
""" cancel()
Attempt to cancel the call. If the call is currently being executed
and cannot be cancelled then the method will return False, otherwise
the call will be cancelled and the method will return True.
"""
if self._status == 1:
# Running, cannot cancel
return False
elif self._status == 0:
# Cancel now
self._status = 2
self._send('req-')
for fn in self._callbacks:
yoton.call_later(fn, 0, self)
return True
else:
# Already done or canceled
return True
def cancel(self):
""" cancel()
Attempt to cancel the call. If the call is currently being executed
and cannot be cancelled then the method will return False, otherwise
the call will be cancelled and the method will return True.
"""
if self._status == 1:
# Running, cannot cancel
return False
elif self._status == 0:
# Cancel now
self._status = 2
self._send('req-')
for fn in self._callbacks:
yoton.call_later(fn, 0, self)
return True
else:
# Already done or canceled
return True
# Get status (but wait first)
time.sleep(0.3)
print(sub2.recv())
# Ask status again (simply gives last message)
print(sub2.recv())
## Using received signals
def on_new_state(channel):
state = channel.recv()
print("%i received state %s" % (id(channel), state))
if state == "stop":
yoton.stop_event_loop()
# Bind
sub1.received.bind(on_new_state)
sub2.received.bind(on_new_state)
# Have some calls made
yoton.call_later(pub1.send, 1.0, "hello")
yoton.call_later(pub1.send, 1.5, "there")
yoton.call_later(pub1.send, 2.0, "now")
yoton.call_later(pub1.send, 2.5, "stop")
# Go!
yoton.start_event_loop()
# Create a context and a sub channel
ct2 = yoton.Context(verbose=verbosity)
sub = yoton.SubChannel(ct2, 'foo')
# Connect, set channel to event driven mode
ct2.connect('publichost:test')
# Create message handler
def message_handler():
message = sub.recv(False)
if message:
print(message)
if message.lower() == 'stop':
yoton.stop_event_loop()
# Bind handler to a timer
timer = yoton.Timer(0.1, False)
timer.bind(message_handler)
timer.start()
# Send messages
yoton.call_later(pub.send, 8, 'stop')
yoton.call_later(pub.send, 2, '2 seconds')
yoton.call_later(pub.send, 4, '4 seconds')
yoton.call_later(pub.send, 6, 'almost done')
# Enter event loop
yoton.start_event_loop()
# Create a context and a sub channel
ct2 = yoton.Context(verbose=verbosity)
sub = yoton.SubChannel(ct2, 'foo')
# Connect, set channel to event driven mode
ct2.connect('publichost:test')
# Create message handler
def message_handler():
message = sub.recv(False)
if message:
print(message)
if message.lower() == 'stop':
yoton.stop_event_loop()
# Bind handler to a timer
timer = yoton.Timer(0.1, False)
timer.bind(message_handler)
timer.start()
# Send messages
yoton.call_later(pub.send, 8, 'stop')
yoton.call_later(pub.send, 2, '2 seconds')
yoton.call_later(pub.send, 4, '4 seconds')
yoton.call_later(pub.send, 6, 'almost done')
# Enter event loop
yoton.start_event_loop()
# Create a context and a sub channel
ct2 = yoton.Context(verbose=verbosity)
sub = yoton.SubChannel(ct2, "foo")
# Connect, set channel to event driven mode
ct2.connect("publichost:test")
# Create message handler
def message_handler():
message = sub.recv(False)
if message:
print(message)
if message.lower() == "stop":
yoton.stop_event_loop()
# Bind handler to a timer
timer = yoton.Timer(0.1, False)
timer.bind(message_handler)
timer.start()
# Send messages
yoton.call_later(pub.send, 8, "stop")
yoton.call_later(pub.send, 2, "2 seconds")
yoton.call_later(pub.send, 4, "4 seconds")
yoton.call_later(pub.send, 6, "almost done")
# Enter event loop
yoton.start_event_loop()
ct4.connect('localhost:test3')
# Get status (but wait first)
time.sleep(0.3)
print(sub2.recv())
# Ask status again (simply gives last message)
print(sub2.recv())
## Using received signals
def on_new_state(channel):
state = channel.recv()
print('%i received state %s' % (id(channel), state))
if state == 'stop':
yoton.stop_event_loop()
# Bind
sub1.received.bind(on_new_state)
sub2.received.bind(on_new_state)
# Have some calls made
yoton.call_later(pub1.send, 1.0, 'hello')
yoton.call_later(pub1.send, 1.5, 'there')
yoton.call_later(pub1.send, 2.0, 'now')
yoton.call_later(pub1.send, 2.5, 'stop')
# Go!
yoton.start_event_loop()