class BaseApp:
__metaclass__=ABCMeta
def __init__(self, devices):
self.devices = devices
self.task_result_queue = Queue.Queue()
self.task_dispatcher = TaskDispatcher(self.devices, self.task_result_queue)
self.message_dispatcher = MessageDispatcher()
def createAndAddTask(self, orders):
new_task = self.task_dispatcher.createTask(orders)
if new_task.canProcess():
return self.task_dispatcher.addTask(new_task)
raise Exception("The new task can not be executing, because the operations can NOT be found")
def pumpTaskStatusMessage(self):
try:
task_result = self.task_result_queue.get_nowait()
return task_result
except Queue.Empty:
pass
return None
def dispatchMessage(self, topic, message):
if message is None:
return
self.message_dispatcher.publishAsync(topic, message)
def installBroadcastMessageHandler(self, callback, front = False):
self.subscribe(BROADCAST_MSG_TOPICS.TASK_STATUS,
callback, front)
def uninstallBroadcastMessageHandler(self, callback):
self.unsubscribe(BROADCAST_MSG_TOPICS.TASK_STATUS,
callback)
def subscribe(self, topic, callback, front = False):
self.message_dispatcher.subscribe(topic, callback, front)
def unsubscribe(self, topic, callback):
self.message_dispatcher.unsubscribe(topic, callback)
def close(self):
self.task_dispatcher.close()
self.message_dispatcher.close()
def __init__(self, devices):
self.devices = devices
self.task_result_queue = Queue.Queue()
self.task_dispatcher = TaskDispatcher(self.devices, self.task_result_queue)
self.message_dispatcher = MessageDispatcher()
