Python twisted.internet.error.AlreadyCancelled() Examples

def reset(self, secondsFromNow):
        """Reschedule this call for a different time

        @type secondsFromNow: C{float}
        @param secondsFromNow: The number of seconds from the time of the
        C{reset} call at which this call will be scheduled.

        @raise AlreadyCancelled: Raised if this call has been cancelled.
        @raise AlreadyCalled: Raised if this call has already been made.
        """
        if self.cancelled:
            raise error.AlreadyCancelled
        elif self.called:
            raise error.AlreadyCalled
        else:
            newTime = self.seconds() + secondsFromNow
            if newTime < self.time:
                self.delayed_time = 0
                self.time = newTime
                self.resetter(self)
            else:
                self.delayed_time = newTime - self.time 

def reset(self, secondsFromNow):
        """Reschedule this call for a different time

        @type secondsFromNow: C{float}
        @param secondsFromNow: The number of seconds from the time of the
        C{reset} call at which this call will be scheduled.

        @raise AlreadyCancelled: Raised if this call has been cancelled.
        @raise AlreadyCalled: Raised if this call has already been made.
        """
        if self.cancelled:
            raise error.AlreadyCancelled
        elif self.called:
            raise error.AlreadyCalled
        else:
            newTime = self.seconds() + secondsFromNow
            if newTime < self.time:
                self.delayed_time = 0
                self.time = newTime
                self.resetter(self)
            else:
                self.delayed_time = newTime - self.time 

def testCallLater(self):
        # add and remove a callback
        def bad():
            raise RuntimeError, "this shouldn't have been called"
        i = reactor.callLater(0.1, bad)
        i.cancel()

        self.assertRaises(error.AlreadyCancelled, i.cancel)

        d = defer.Deferred()
        i = reactor.callLater(0.5, self._callback, d, 1, a=1)
        start = time.time()

        def check(ignored):
            self.assertApproximates(self._calledTime, start + 0.5, 0.2 )
            self.assertRaises(error.AlreadyCalled, i.cancel)
            del self._called
            del self._calledTime
        d.addCallback(check)
        return d 

def delay(self, secondsLater):
        """Reschedule this call for a later time

        @type secondsLater: C{float}
        @param secondsLater: The number of seconds after the originally
        scheduled time for which to reschedule this call.

        @raise AlreadyCancelled: Raised if this call has been cancelled.
        @raise AlreadyCalled: Raised if this call has already been made.
        """
        if self.cancelled:
            raise error.AlreadyCancelled
        elif self.called:
            raise error.AlreadyCalled
        else:
            self.delayed_time += secondsLater
            if self.delayed_time < 0:
                self.activate_delay()
                self.resetter(self) 

def reset(self, secondsFromNow):
        """Reschedule this call for a different time

        @type secondsFromNow: C{float}
        @param secondsFromNow: The number of seconds from the time of the
        C{reset} call at which this call will be scheduled.

        @raise AlreadyCancelled: Raised if this call has been cancelled.
        @raise AlreadyCalled: Raised if this call has already been made.
        """
        if self.cancelled:
            raise error.AlreadyCancelled
        elif self.called:
            raise error.AlreadyCalled
        else:
            if self.seconds is None:
                new_time = seconds() + secondsFromNow
            else:
                new_time = self.seconds() + secondsFromNow
            if new_time < self.time:
                self.delayed_time = 0
                self.time = new_time
                self.resetter(self)
            else:
                self.delayed_time = new_time - self.time 

def cancel(self):
        """Unschedule this call

        @raise AlreadyCancelled: Raised if this call has already been
        unscheduled.

        @raise AlreadyCalled: Raised if this call has already been made.
        """
        if self.cancelled:
            raise error.AlreadyCancelled
        elif self.called:
            raise error.AlreadyCalled
        else:
            self.canceller(self)
            self.cancelled = 1
            if self.debug:
                self._str = str(self)
            del self.func, self.args, self.kw 

def delay(self, secondsLater):
        """Reschedule this call for a later time

        @type secondsLater: C{float}
        @param secondsLater: The number of seconds after the originally
        scheduled time for which to reschedule this call.

        @raise AlreadyCancelled: Raised if this call has been cancelled.
        @raise AlreadyCalled: Raised if this call has already been made.
        """
        if self.cancelled:
            raise error.AlreadyCancelled
        elif self.called:
            raise error.AlreadyCalled
        else:
            self.delayed_time += secondsLater
            if self.delayed_time < 0:
                self.activate_delay()
                self.resetter(self) 

def reset(self, secondsFromNow):
        """Reschedule this call for a different time

        @type secondsFromNow: C{float}
        @param secondsFromNow: The number of seconds from the time of the
        C{reset} call at which this call will be scheduled.

        @raise AlreadyCancelled: Raised if this call has been cancelled.
        @raise AlreadyCalled: Raised if this call has already been made.
        """
        if self.cancelled:
            raise error.AlreadyCancelled
        elif self.called:
            raise error.AlreadyCalled
        else:
            newTime = self.seconds() + secondsFromNow
            if newTime < self.time:
                self.delayed_time = 0
                self.time = newTime
                self.resetter(self)
            else:
                self.delayed_time = newTime - self.time 

def cancel(self):
        """Unschedule this call

        @raise AlreadyCancelled: Raised if this call has already been
        unscheduled.

        @raise AlreadyCalled: Raised if this call has already been made.
        """
        if self.cancelled:
            raise error.AlreadyCancelled
        elif self.called:
            raise error.AlreadyCalled
        else:
            self.canceller(self)
            self.cancelled = 1
            if self.debug:
                self._str = str(self)
            del self.func, self.args, self.kw 

def delay(self, secondsLater):
        """Reschedule this call for a later time

        @type secondsLater: C{float}
        @param secondsLater: The number of seconds after the originally
        scheduled time for which to reschedule this call.

        @raise AlreadyCancelled: Raised if this call has been cancelled.
        @raise AlreadyCalled: Raised if this call has already been made.
        """
        if self.cancelled:
            raise error.AlreadyCancelled
        elif self.called:
            raise error.AlreadyCalled
        else:
            self.delayed_time += secondsLater
            if self.delayed_time < 0:
                self.activate_delay()
                self.resetter(self) 

def reset(self, secondsFromNow):
        """Reschedule this call for a different time

        @type secondsFromNow: C{float}
        @param secondsFromNow: The number of seconds from the time of the
        C{reset} call at which this call will be scheduled.

        @raise AlreadyCancelled: Raised if this call has been cancelled.
        @raise AlreadyCalled: Raised if this call has already been made.
        """
        if self.cancelled:
            raise error.AlreadyCancelled
        elif self.called:
            raise error.AlreadyCalled
        else:
            newTime = self.seconds() + secondsFromNow
            if newTime < self.time:
                self.delayed_time = 0
                self.time = newTime
                self.resetter(self)
            else:
                self.delayed_time = newTime - self.time 

def cancel(self):
        """Unschedule this call

        @raise AlreadyCancelled: Raised if this call has already been
        unscheduled.

        @raise AlreadyCalled: Raised if this call has already been made.
        """
        if self.cancelled:
            raise error.AlreadyCancelled
        elif self.called:
            raise error.AlreadyCalled
        else:
            self.canceller(self)
            self.cancelled = 1
            if self.debug:
                self._str = str(self)
            del self.func, self.args, self.kw 

def delay(self, secondsLater):
        """Reschedule this call for a later time

        @type secondsLater: C{float}
        @param secondsLater: The number of seconds after the originally
        scheduled time for which to reschedule this call.

        @raise AlreadyCancelled: Raised if this call has been cancelled.
        @raise AlreadyCalled: Raised if this call has already been made.
        """
        if self.cancelled:
            raise error.AlreadyCancelled
        elif self.called:
            raise error.AlreadyCalled
        else:
            self.delayed_time += secondsLater
            if self.delayed_time < 0:
                self.activate_delay()
                self.resetter(self) 

def cancel(self):
        """Unschedule this call

        @raise AlreadyCancelled: Raised if this call has already been
        unscheduled.

        @raise AlreadyCalled: Raised if this call has already been made.
        """
        if self.cancelled:
            raise error.AlreadyCancelled
        elif self.called:
            raise error.AlreadyCalled
        else:
            self.canceller(self)
            self.cancelled = 1
            if self.debug:
                self._repr = repr(self)
            del self.func, self.args, self.kw 

def enqueuedJob(self):
        """
        Reschedule the work check loop to run right now. This should be called in response to "external" activity that
        might want to "speed up" the job queue polling because new work may have been added.
        """

        # Only need to do this if the actual poll interval is greater than the default rapid value
        if self._actualPollInterval == self.queuePollInterval:
            return

        # Bump time of last work so that we go back to the rapid (default) polling interval
        self._timeOfLastWork = time.time()

        # Reschedule the outstanding delayed call (handle exceptions by ignoring if its already running or
        # just finished)
        try:
            if self._workCheckCall is not None:
                self._workCheckCall.reset(0)
        except (AlreadyCalled, AlreadyCancelled):
            pass 

def delay(self, secondsLater):
        """Reschedule this call for a later time

        @type secondsLater: C{float}
        @param secondsLater: The number of seconds after the originally
        scheduled time for which to reschedule this call.

        @raise AlreadyCancelled: Raised if this call has been cancelled.
        @raise AlreadyCalled: Raised if this call has already been made.
        """
        if self.cancelled:
            raise error.AlreadyCancelled
        elif self.called:
            raise error.AlreadyCalled
        else:
            self.delayed_time += secondsLater
            if self.delayed_time < 0:
                self.activate_delay()
                self.resetter(self) 

def cancel(self):
        """Unschedule this call

        @raise AlreadyCancelled: Raised if this call has already been
        unscheduled.

        @raise AlreadyCalled: Raised if this call has already been made.
        """
        if self.cancelled:
            raise error.AlreadyCancelled
        elif self.called:
            raise error.AlreadyCalled
        else:
            self.canceller(self)
            self.cancelled = 1
            if self.debug:
                self._str = bytes(self)
            del self.func, self.args, self.kw 

def test_cancelCancelledDelayedCall(self):
        """
        Test that cancelling a DelayedCall which has already been cancelled
        raises the appropriate exception.
        """
        call = reactor.callLater(0, lambda: None)
        call.cancel()
        self.assertRaises(error.AlreadyCancelled, call.cancel) 

def abort_request(self, request):
        """Called to abort request on timeout"""
        self.timedout = True
        if not request.called:
            try:
                request.cancel()
            except error.AlreadyCancelled:
                return 

def cancelTimeout(self):
        """
        Cancel the timeout.

        If the timeout was already cancelled, this does nothing.
        """
        self.timeoutPeriod = None
        if self.timeoutCall:
            try:
                self.timeoutCall.cancel()
            except (error.AlreadyCalled, error.AlreadyCancelled):
                pass
            self.timeoutCall = None 

def remove_alarm(self, handle):
        """
        Remove an alarm.

        Returns True if the alarm exists, False otherwise
        """
        from twisted.internet.error import AlreadyCancelled, AlreadyCalled
        try:
            handle.cancel()
            return True
        except AlreadyCancelled:
            return False
        except AlreadyCalled:
            return False 

def reset(self, seconds_fromnow):
        """Resets an already running timer, or starts it if it wasn't running.

        :param seconds_fromnow : restart timer
        """

        try:
            self.status = True
            self.delayed_call.reset(seconds_fromnow)
        except (AttributeError, error.AlreadyCalled, error.AlreadyCancelled):
            self.delayed_call = reactor.callLater(seconds_fromnow, self.callable) 

def cancel(self):

        """Cancels the timer if it was running, does nothing otherwise"""

        try:
            self.delayed_call.cancel()
            self.status = False
        except (AttributeError, error.AlreadyCalled, error.AlreadyCancelled):
            pass 

def test_cancelCancelledDelayedCall(self):
        """
        Test that cancelling a DelayedCall which has already been cancelled
        raises the appropriate exception.
        """
        call = reactor.callLater(0, lambda: None)
        call.cancel()
        self.assertRaises(error.AlreadyCancelled, call.cancel) 

def test_cancelCancelledDelayedCall(self):
        """
        Test that cancelling a DelayedCall which has already been cancelled
        raises the appropriate exception.
        """
        call = reactor.callLater(0, lambda: None)
        call.cancel()
        self.assertRaises(error.AlreadyCancelled, call.cancel) 

def getSession(self, sessionInterface=None, forceNotSecure=False):
        """
        Check if there is a session cookie, and if not, create it.

        By default, the cookie with be secure for HTTPS requests and not secure
        for HTTP requests.  If for some reason you need access to the insecure
        cookie from a secure request you can set C{forceNotSecure = True}.

        @param forceNotSecure: Should we retrieve a session that will be
            transmitted over HTTP, even if this L{Request} was delivered over
            HTTPS?
        @type forceNotSecure: L{bool}
        """
        # Make sure we aren't creating a secure session on a non-secure page
        secure = self.isSecure() and not forceNotSecure

        if not secure:
            cookieString = b"TWISTED_SESSION"
            sessionAttribute = "_insecureSession"
        else:
            cookieString = b"TWISTED_SECURE_SESSION"
            sessionAttribute = "_secureSession"

        session = getattr(self, sessionAttribute)

        if session is not None:
            # We have a previously created session.
            try:
                # Refresh the session, to keep it alive.
                session.touch()
            except (AlreadyCalled, AlreadyCancelled):
                # Session has already expired.
                session = None

        if session is None:
            # No session was created yet for this request.
            cookiename = b"_".join([cookieString] + self.sitepath)
            sessionCookie = self.getCookie(cookiename)
            if sessionCookie:
                try:
                    session = self.site.getSession(sessionCookie)
                except KeyError:
                    pass
            # if it still hasn't been set, fix it up.
            if not session:
                session = self.site.makeSession()
                self.addCookie(cookiename, session.uid, path=b"/",
                               secure=secure)

        setattr(self, sessionAttribute, session)

        if sessionInterface:
            return session.getComponent(sessionInterface)

        return session