def run(self):
logger.info("Transmitter Application Controller starting")
# Kill broadcast subscriber
kbsubscriber = NetworkingManager.KillBroadcastSubscriber()
usb_monitor_pair = NetworkingManager.UsbMonitorPairClient()
self.router = NetworkingManager.TACParent()
self.poller = NetworkingManager.Poller()
self.poller.register(kbsubscriber, NetworkingManager.POLLIN)
self.poller.register(usb_monitor_pair, NetworkingManager.POLLIN)
self.poller.register(self.router, NetworkingManager.POLLIN)
while True:
self.request_buffer.dispatch_all()
socks = dict(self.poller.poll(50))
if self.router.contained_in(socks):
child_id, string = self.router.recv_string()
# do some stuff with reply
app = self.transmitter_applications[child_id]
if app.last_request == Command.SHUTDOWN:
reply = CommandMessage.deserialize(string)
self.request_buffer.process_reply(reply)
if app.process.is_alive():
app.process.terminate()
del self.transmitter_applications[child_id]
if usb_monitor_pair.contained_in(socks):
# a message from the usb port controller indicates
# a usb device has been added or removed from the system
request = DocumentMessage.deserialize(
usb_monitor_pair.recv_string()
)
logger.info("Request received: " + request.serialize())
usb_operation = UsbOperation.from_json(request.contents)
self.process_usb_operation(usb_operation)
# send a void reply to confirm receipt
reply = CommandMessage.VoidReply(request)
usb_monitor_pair.send_string(reply.serialize())
if kbsubscriber.contained_in(socks):
message = CommandMessage.deserialize(
kbsubscriber.recv_string()
)
reply_structure = None
try:
command = Command(message.command)
command_processor = CommandProcessor(self)
reply_structure = command_processor.process(command)
except ExitProcess:
self.request_buffer.clear()
self.stop_all_transmitter_applications()
self.request_buffer.dispatch_all()
logger.info("Transmitter Application Controller stopping")
break
finally:
if reply_structure:
pass
def test_process_void0(self):
"""Processing VOID does nothing"""
void_object = None
command_processor = CommandProcessor(void_object)
command = Command('VOID')
void = command_processor.process(command)
self.assertEqual(void, None)
def test_process_status0(self):
# classes without to_json should raise errors
"""Processing STATUS of None raises Exception"""
status_object = None
command_processor = CommandProcessor(status_object)
with self.assertRaises(AttributeError):
command = Command('STATUS')
status = command_processor.process(command)
def test_process_shutdown1(self):
"""Processing SHUTDOWN with None raises ExitProcess"""
# make sure the processor raises exception with any object
shutdown_object = None
command_processor = CommandProcessor(shutdown_object)
command = Command('SHUTDOWN')
with self.assertRaises(ExitProcess):
command_processor.process(command)
def test_process_shutdown1(self):
"""Processing SHUTDOWN of TestStruct raises ExitProcess"""
# make sure the processor raises exception with fake struct
shutdown_object = TestStruct('a', 'b', 'c', 'd', 'e', 'f')
command_processor = CommandProcessor(shutdown_object)
command = Command('SHUTDOWN')
with self.assertRaises(ExitProcess):
command_processor.process(command)
def test_process_status1(self):
"""Processing STATUS of TestStruct returns JSON to reconstruct TestStruct"""
status_object = TestStruct('a', 'b', 'c', 'd', 'e', 'f')
command_processor = CommandProcessor(status_object)
command = Command('STATUS')
status = command_processor.process(command)
status_object_reconstructed = TestStruct.from_json(status)
self.assertEqual(
status_object,
status_object_reconstructed
)
def run(self):
logger.info("USB Port Controller starting")
context = pyudev.Context()
monitor = pyudev.Monitor.from_netlink(context)
monitor.filter_by(subsystem="usb", device_type="usb_device")
observer = pyudev.MonitorObserver(monitor, self.handle_event)
observer.start()
kbsubscriber = NetworkingManager.KillBroadcastSubscriber()
usb_monitor_pair = NetworkingManager.UsbMonitorPairServer()
poller = NetworkingManager.Poller()
poller.register(kbsubscriber, NetworkingManager.POLLIN)
poller.register(usb_monitor_pair, NetworkingManager.POLLIN)
for device in self.usb_bus.devices:
new_op = UsbOperation(usb_device=device, operation=Operation("add"))
message = DocumentMessage(document=new_op.to_json())
request = Request(
id=message.id, dispatcher=usb_monitor_pair.send_string, args=message.serialize(), hop_limit=10
)
self.request_buffer.append(request)
while True:
self.request_buffer.dispatch_all()
socks = dict(poller.poll(50))
if usb_monitor_pair.contained_in(socks):
reply = CommandMessage.deserialize(usb_monitor_pair.recv_string())
self.request_buffer.process_reply(reply)
if kbsubscriber.contained_in(socks):
message = CommandMessage.deserialize(kbsubscriber.recv_string())
reply_structure = None
try:
command = Command(message.command)
command_processor = CommandProcessor(self)
reply_structure = command_processor.process(command)
except ExitProcess:
observer.stop()
usb_monitor_pair.unbind()
logger.info("USB Port Controller stopping")
break
finally:
# send message if applicable
if reply_structure:
pass