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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 sys |
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import traceback |
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import zmq |
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import enarksh |
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from enarksh.controller.message.ScheduleDefinitionMessage import ScheduleDefinitionMessage |
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class LoadScheduleClient: |
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""" |
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A client for requesting the controller to load new schedules. |
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""" |
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# ------------------------------------------------------------------------------------------------------------------ |
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def __init__(self, io): |
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""" |
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Object constructor. |
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:param enarksh.style.EnarkshStyle.EnarkshStyle io: The output decorator. |
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""" |
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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._zmq_controller = None |
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""" |
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The socket for communicating with the controller. |
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:type: zmq.sugar.socket.Socket |
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""" |
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self._io = io |
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""" |
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The output decorator. |
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:type: enarksh.style.EnarkshStyle.EnarkshStyle |
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""" |
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# ------------------------------------------------------------------------------------------------------------------ |
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def main(self, filenames): |
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""" |
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The main function of load_schedule. |
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:param list[str] filenames: The filenames of the schedules to be loaded. |
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""" |
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# Initialize ZMQ. |
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self._zmq_init() |
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# Send XML files to the controller. |
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status = 0 |
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for filename in filenames: |
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try: |
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err = self._load_schedule(filename) |
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if err: |
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status = -1 |
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except Exception as exception: |
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print(exception, file=sys.stderr) |
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traceback.print_exc(file=sys.stderr) |
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status = -1 |
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return status |
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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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# Create socket for communicating with the controller. |
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self._zmq_controller = self._zmq_context.socket(zmq.REQ) |
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self._zmq_controller.connect(enarksh.CONTROLLER_LOCKSTEP_END_POINT) |
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# ------------------------------------------------------------------------------------------------------------------ |
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def _load_schedule(self, filename): |
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""" |
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Sends a message to the controller to load a new schedule definition. |
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:param str filename: The name of XML file with the schedule definition. |
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:rtype bool: True on success. Otherwise False. |
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""" |
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with open(filename, 'rt', encoding='utf-8') as f: |
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xml = f.read() |
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# Compose the message for the controller. |
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message = ScheduleDefinitionMessage(xml, os.path.realpath(filename)) |
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# Send the message to the controller. |
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self._zmq_controller.send_pyobj(message) |
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# Await the response from the controller. |
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response = self._zmq_controller.recv_json() |
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if response['ret'] == 0: |
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self._io.log_verbose(response['message']) |
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else: |
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self._io.error(response['message']) |
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return response['ret'] == 0 |
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# ---------------------------------------------------------------------------------------------------------------------- |
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SetBased /
py-enarksh
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