class Application(object):
"""The Application represents diesel's main loop--
the coordinating entity that runs all Services, Loops,
Client protocol work, etc.
"""
def __init__(self, logger=None):
global current_app
current_app = self
self.hub = EventHub()
self._run = False
if logger is None:
logger = logmod.Logger()
self.logger = logger
self._services = []
self._loops = []
def run(self):
"""Start up an Application--blocks until the program ends
or .halt() is called.
"""
self._run = True
logmod.set_current_application(self)
log.info("Starting diesel application")
for s in self._services:
s.bind_and_listen()
self.hub.register(s.sock, s.accept_new_connection, None)
for l in self._loops:
l.iterate()
self.setup()
while self._run:
try:
self.hub.handle_events()
except SystemExit:
log.warn("-- SystemExit raised.. exiting main loop --")
break
except KeyboardInterrupt:
log.warn("-- KeyboardInterrupt raised.. exiting main loop --")
break
except Exception, e:
log.error("-- Unhandled Exception in main loop --")
log.error(traceback.format_exc())
log.info("Ending diesel application")
class Application(object):
'''The Application represents diesel's main loop--
the coordinating entity that runs all Services, Loops,
Client protocol work, etc.
'''
def __init__(self, logger=None, allow_app_replacement=False):
assert (allow_app_replacement or runtime.current_app is None), "Only one Application instance per program allowed"
runtime.current_app = self
self.hub = EventHub()
self.waits = WaitPool()
self._run = False
if logger is None:
logger = logmod.Logger()
self.logger = logger
logmod.set_current_application(self)
self._services = []
self._loops = []
self.running = set()
def global_bail(self, msg):
def bail():
self.logger.critical("ABORTING: %s" % msg)
self.halt()
return bail
def run(self):
'''Start up an Application--blocks until the program ends
or .halt() is called.
'''
self._run = True
log.warn('Starting diesel <%s>'
% self.hub.describe)
for s in self._services:
s.bind_and_listen()
self.hub.register(s.sock, s.accept_new_connection, None,
self.global_bail("low-level socket error on bound service"))
for l in self._loops:
self.hub.schedule(l.wake)
self.setup()
def main():
while self._run:
try:
self.hub.handle_events()
except SystemExit:
log.warn("-- SystemExit raised.. exiting main loop --")
break
except KeyboardInterrupt:
log.warn("-- KeyboardInterrupt raised.. exiting main loop --")
break
except ApplicationEnd:
log.warn("-- ApplicationEnd raised.. exiting main loop --")
break
except Exception, e:
log.error("-- Unhandled Exception rose to main loop --")
log.error(traceback.format_exc())
log.info('Ending diesel application')
runtime.current_app = None
self.runhub = greenlet(main)
self.runhub.switch()
class Application(object):
'''The Application represents diesel's main loop--
the coordinating entity that runs all Services, Loops,
Client protocol work, etc.
'''
def __init__(self, logger=None, allow_app_replacement=False):
assert (allow_app_replacement or runtime.current_app is None
), "Only one Application instance per program allowed"
runtime.current_app = self
self.hub = EventHub()
self.waits = WaitPool()
self._run = False
if logger is None:
logger = logmod.Logger()
self.logger = logger
logmod.set_current_application(self)
self._services = []
self._loops = []
self.running = set()
def global_bail(self, msg):
def bail():
self.logger.critical("ABORTING: %s" % msg)
self.halt()
return bail
def run(self):
'''Start up an Application--blocks until the program ends
or .halt() is called.
'''
self._run = True
log.info('Starting diesel application')
for s in self._services:
s.bind_and_listen()
self.hub.register(
s.sock, s.accept_new_connection, None,
self.global_bail("low-level socket error on bound service"))
for l in self._loops:
self.hub.schedule(l.wake)
self.setup()
def main():
while self._run:
try:
self.hub.handle_events()
except SystemExit:
log.warn("-- SystemExit raised.. exiting main loop --")
break
except KeyboardInterrupt:
log.warn(
"-- KeyboardInterrupt raised.. exiting main loop --")
break
except ApplicationEnd:
log.warn("-- ApplicationEnd raised.. exiting main loop --")
break
except Exception, e:
log.error("-- Unhandled Exception rose to main loop --")
log.error(traceback.format_exc())
log.info('Ending diesel application')
runtime.current_app = None
self.runhub = greenlet(main)
self.runhub.switch()
