Source code for nxswriter.ElementThread

#!/usr/bin/env python
#   This file is part of nexdatas - Tango Server for NeXus data writer
#
#    Copyright (C) 2012-2017 DESY, Jan Kotanski <jkotan@mail.desy.de>
#
#    nexdatas is free software: you can redistribute it and/or modify
#    it under the terms of the GNU General Public License as published by
#    the Free Software Foundation, either version 3 of the License, or
#    (at your option) any later version.
#
#    nexdatas is distributed in the hope that it will be useful,
#    but WITHOUT ANY WARRANTY; without even the implied warranty of
#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#    GNU General Public License for more details.
#
#    You should have received a copy of the GNU General Public License
#    along with nexdatas.  If not, see <http://www.gnu.org/licenses/>.
#

""" Implementation of element thread for tag evaluation """

from threading import Thread
import sys
import time

if sys.version_info > (3,):
    import queue as Queue
else:
    import Queue


[docs]class ElementThread(Thread): """ single thread element """ def __init__(self, index, queue): """ constructor :brief: It creates ElementThread from the runnable element :param index: the current thread index :type index: :obj:`int` :param queue: queue with tasks :type queue: :class:`Queue.Queue` """ Thread.__init__(self) #: (:obj:`int`) thread index self.index = index #: (:class:`Queue.Queue`) queue with runnable elements self.__queue = queue
[docs] def run(self): """ runner :brief: It runs the defined thread """ full = True while full: try: elem = self.__queue.get(block=False) if hasattr(elem, "run") and callable(elem.run): elem.error = None elem.runtime = 0 st = time.time() elem.run() elem.runtime = time.time() - st except Queue.Empty: full = False