def __init__(self, connection_manager, channel):
self.connection_manager = connection_manager
self.channel = channel
self.local_stub = VolthaLocalServiceStub(channel)
self.stopped = False
self.packet_out_queue = Queue() # queue to send out PacketOut msgs
self.packet_in_queue = DeferredQueue() # queue to receive PacketIn
self.change_event_queue = DeferredQueue() # queue change events
class GrpcClient(object):
def __init__(self, connection_manager, channel, grpc_timeout):
self.log = get_logger()
self.connection_manager = connection_manager
self.channel = channel
self.grpc_timeout = grpc_timeout
self.local_stub = VolthaLocalServiceStub(channel)
self.stopped = False
self.packet_out_queue = Queue() # queue to send out PacketOut msgs
self.packet_in_queue = DeferredQueue() # queue to receive PacketIn
self.change_event_queue = DeferredQueue() # queue change events
def start(self):
self.log.debug('starting', grpc_timeout=self.grpc_timeout)
self.start_packet_out_stream()
self.start_packet_in_stream()
self.start_change_event_in_stream()
reactor.callLater(0, self.packet_in_forwarder_loop)
reactor.callLater(0, self.change_event_processing_loop)
self.log.info('started')
return self
def stop(self):
self.log.debug('stopping')
self.stopped = True
self.log.info('stopped')
def start_packet_out_stream(self):
def packet_generator():
while 1:
try:
packet = self.packet_out_queue.get(block=True, timeout=1.0)
except Empty:
if self.stopped:
return
else:
yield packet
def stream_packets_out():
generator = packet_generator()
try:
self.local_stub.StreamPacketsOut(generator)
except _Rendezvous, e:
self.log.error('grpc-exception', status=e.code())
if e.code() == StatusCode.UNAVAILABLE:
os.system("kill -15 {}".format(os.getpid()))
reactor.callInThread(stream_packets_out)