def unblock_event(self, event):
if event in self.event_handlers:
if self.event_handlers[event].blocker_tokens:
log.debug2("Unblocking an event: %s", event)
self.event_handlers[event].blocker_tokens.pop()
else:
log.debug("Trying to unblock non-blocked event '%s'", event)
else:
log.info("Trying to unblock an unknown event: %s", event)
def block_event(self, event, disable_log=False):
if event in self.event_handlers:
self.event_handlers[event].blocker_tokens.append(True)
if not disable_log:
log.debug2("Blocking an event: %s (%d blockers reached)",
event,
len(self.event_handlers[event].blocker_tokens))
else:
if not disable_log:
log.info("Trying to block an unknown event: %s", event)
def emit_event(self, event, *args, **kwargs):
log.debug2("Event emitted: %s", event)
if event in self.event_handlers:
if self.event_handlers[event].blocker_tokens:
log.debug2("Ignoring blocked event: %s", event)
return
# prevent infinite recursion
with self.blocked_events({event}):
for handler in self.event_handlers[event].handlers:
handler.func(*(handler.args + args), **kwargs)
else:
log.debug("No events registered for event '%s'", event)
def emit_event(self, event, *args, **kwargs):
log.debug2("Event emitted: %s", str(event))
if event in self.event_handlers:
if self.event_handlers[event].blocker_tokens:
return
# prevent infinite recursion
self.block_event(event)
for handler in self.event_handlers[event].handlers:
handler.func(*(handler.args + args), **kwargs)
self.unblock_event(event)
else:
log.debug("No events registered for event '%s'", str(event))
def emit_event(self, event, *args, **kwargs):
log.debug2("Event emitted: %s" % str(event))
if event in self.event_handlers:
if self.event_handlers[event][EVENT_BLOCKER_INDEX] != 0:
return
# prevent infinite recursion
self.block_event(event)
for handler in self.event_handlers[event][EVENT_HANDLER_INDEX]:
func = handler[HANDLER_FUNC_INDEX]
data = handler[HANDLER_ARG_INDEX]
func(*(data + args), **kwargs)
self.unblock_event(event)
else:
log.debug("No events registered for event '%s'" % str(event))
def emit_event(self, event, *args, **kwargs):
log.debug2("Event emitted: %s" % str(event))
if event in self.event_handlers:
if self.event_handlers[event][EVENT_BLOCKER_INDEX] != 0:
return
# prevent infinite recursion
self.block_event(event)
for handler in self.event_handlers[event][EVENT_HANDLER_INDEX]:
func = handler[HANDLER_FUNC_INDEX]
data = handler[HANDLER_ARG_INDEX]
func(*(data + args), **kwargs)
self.unblock_event(event)
else:
log.debug("No events registered for event '%s'" % str(event))
def unblock_event(self, event, disable_log=False):
if event in self.event_handlers:
if self.event_handlers[event].blocker_tokens:
self.event_handlers[event].blocker_tokens.pop()
if not disable_log:
log.debug2(
"Unblocking an event: %s (%d blockers remaining)",
event, len(self.event_handlers[event].blocker_tokens))
else:
if not disable_log:
log.debug("Trying to unblock non-blocked event '%s'",
event)
else:
# "disable_log" is only relevant for the debugging messages above
log.info("Trying to unblock an unknown event: %s", event)
def emit_event(self, event):
log.debug2("Event emitted: %s", event)
if event in self.event_handlers:
self.event_handlers[event].statistics["emitted"] += 1
if self.event_handlers[event].blocker_tokens:
self.event_handlers[event].statistics["blocked"] += 1
log.debug2("Ignoring blocked event: %s", event)
else:
# prevent infinite recursion
with self.blocked_events({event}, disable_log=True):
self.event_handlers[event].statistics["handled"] += 1
for handler in self.event_handlers[event].handlers:
log.debug2("Calling event handler: %s", handler)
if isinstance(handler, str):
# event names are acceptable
self.emit_event(handler)
else:
handler()
else:
log.debug("No events registered for event '%s'", event)
def block_event(self, event):
if event in self.event_handlers:
log.debug2("Blocking an event: %s", event)
self.event_handlers[event].blocker_tokens.append(True)
else:
log.info("Trying to block an unknown event: %s", event)