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""" |
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Enarksh |
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Copyright 2013-2016 Set Based IT Consultancy |
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Licence MIT |
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""" |
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import os |
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import zmq |
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from cleo import Command |
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from enarksh.C import C |
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from enarksh.Config import Config |
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from enarksh.message.HaltMessage import HaltMessage |
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from enarksh.style.EnarkshStyle import EnarkshStyle |
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class HaltCommand(Command): |
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""" |
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Halts a daemon of Enarksh |
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halt |
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{daemon : The Enarksh daemon to halt: controller, logger, or spanwerd} |
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""" |
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# ------------------------------------------------------------------------------------------------------------------ |
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def __init__(self): |
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""" |
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Object constructor. |
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""" |
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Command.__init__(self) |
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self._zmq_context = None |
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""" |
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The ZMQ context. |
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:type: Context |
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""" |
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self.__end_points = {} |
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""" |
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The end points of the Enarksh daemons. |
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:type: dict[string,string] |
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""" |
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# ------------------------------------------------------------------------------------------------------------------ |
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def __read_config(self): |
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""" |
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Reads the pull end point of the controller, logger, and spawner. |
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""" |
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config = Config.get() |
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self.__end_points['controller'] = config.get_controller_pull_end_point() |
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self.__end_points['logger'] = config.get_logger_pull_end_point() |
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self.__end_points['spawner'] = config.get_spawner_pull_end_point() |
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# ------------------------------------------------------------------------------------------------------------------ |
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def __zmq_init(self): |
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""" |
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Initializes ZMQ. |
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""" |
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self._zmq_context = zmq.Context() |
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# ------------------------------------------------------------------------------------------------------------------ |
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def handle(self): |
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""" |
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Executes the halt command. |
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""" |
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self.output = EnarkshStyle(self.input, self.output) |
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os.chdir(C.HOME) |
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self.__read_config() |
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self.__zmq_init() |
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daemon = self.input.get_argument('daemon') |
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if daemon not in self.__end_points: |
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self.output.error("Unknown daemon '{}'".format(daemon)) |
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return -1 |
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# Connect tot the daemon. |
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zmq_daemon = self._zmq_context.socket(zmq.PUSH) |
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zmq_daemon.connect(self.__end_points[daemon]) |
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# Send the halt message tot the daemon. |
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message = HaltMessage() |
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zmq_daemon.send_pyobj(message) |
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# ---------------------------------------------------------------------------------------------------------------------- |
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SetBased /
py-enarksh
