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comparison Tests/ExternalCommandThread.py @ 3:2dbba2e6aa4b

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reorganization
author Sebastien Jodogne <s.jodogne@gmail.com>
date Wed, 17 Jun 2015 10:03:49 +0200
parents ExternalCommandThread.py@08dadea8f40a
children
comparison
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2:a15734e7f0af 3:2dbba2e6aa4b
1 #!/usr/bin/python
2
3 # Orthanc - A Lightweight, RESTful DICOM Store
4 # Copyright (C) 2012-2015 Sebastien Jodogne, Medical Physics
5 # Department, University Hospital of Liege, Belgium
6 #
7 # This program is free software: you can redistribute it and/or
8 # modify it under the terms of the GNU General Public License as
9 # published by the Free Software Foundation, either version 3 of the
10 # License, or (at your option) any later version.
11 #
12 # This program is distributed in the hope that it will be useful, but
13 # WITHOUT ANY WARRANTY; without even the implied warranty of
14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 # General Public License for more details.
16 #
17 # You should have received a copy of the GNU General Public License
18 # along with this program. If not, see <http://www.gnu.org/licenses/>.
19
20
21 import os
22 import signal
23 import subprocess
24 import threading
25
26 class ExternalCommandThread:
27 @staticmethod
28 def ExternalCommandFunction(arg, stop_event, command, env):
29 external = subprocess.Popen(command, env = env)
30
31 while (not stop_event.is_set()):
32 error = external.poll()
33 if error != None:
34 # http://stackoverflow.com/a/1489838/881731
35 os._exit(-1)
36 stop_event.wait(0.1)
37
38 print 'Stopping the external command'
39 external.terminate()
40
41 def __init__(self, command, env = None):
42 self.thread_stop = threading.Event()
43 self.thread = threading.Thread(target = self.ExternalCommandFunction,
44 args = (10, self.thread_stop, command, env))
45 self.daemon = True
46 self.thread.start()
47
48 def stop(self):
49 self.thread_stop.set()
50 self.thread.join()