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controller.py
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controller.py
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#!/usr/bin/env python
# -*- coding: utf-8 -*-
# #########################################################################
# Copyright (c) 2016, UChicago Argonne, LLC. All rights reserved. #
# #
# Copyright 2016. UChicago Argonne, LLC. This software was produced #
# under U.S. Government contract DE-AC02-06CH11357 for Argonne National #
# Laboratory (ANL), which is operated by UChicago Argonne, LLC for the #
# U.S. Department of Energy. The U.S. Government has rights to use, #
# reproduce, and distribute this software. NEITHER THE GOVERNMENT NOR #
# UChicago Argonne, LLC MAKES ANY WARRANTY, EXPRESS OR IMPLIED, OR #
# ASSUMES ANY LIABILITY FOR THE USE OF THIS SOFTWARE. If software is #
# modified to produce derivative works, such modified software should #
# be clearly marked, so as not to confuse it with the version available #
# from ANL. #
# #
# Additionally, redistribution and use in source and binary forms, with #
# or without modification, are permitted provided that the following #
# conditions are met: #
# #
# * Redistributions of source code must retain the above copyright #
# notice, this list of conditions and the following disclaimer. #
# #
# * Redistributions in binary form must reproduce the above copyright #
# notice, this list of conditions and the following disclaimer in #
# the documentation and/or other materials provided with the #
# distribution. #
# #
# * Neither the name of UChicago Argonne, LLC, Argonne National #
# Laboratory, ANL, the U.S. Government, nor the names of its #
# contributors may be used to endorse or promote products derived #
# from this software without specific prior written permission. #
# #
# THIS SOFTWARE IS PROVIDED BY UChicago Argonne, LLC AND CONTRIBUTORS #
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT #
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS #
# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL UChicago #
# Argonne, LLC OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, #
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, #
# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; #
# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER #
# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT #
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN #
# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE #
# POSSIBILITY OF SUCH DAMAGE. #
# #########################################################################
"""
"""
from multiprocessing.managers import SyncManager
import subprocess
import json
import uuid
__author__ = "Barbara Frosik"
__copyright__ = "Copyright (c) 2016, UChicago Argonne, LLC."
__docformat__ = 'restructuredtext en'
__all__ = ['start_verifier',
'stop_verifier']
# Host and Port should be configured
# HOST = "txmtwo"
# PORT = "5011"
# VER_DIR = "/home/beams/USR32IDC/temp/"
HOST = ""
PORT = 5011
VER_DIR = "/local/bfrosik/data-quality"
def start_verifier(conf, report_file, variableDict):
"""
This function starts a real-time verifier application on a remote machine. It first starts a server that controls
starting and stopping of the verifier. On starting the server this method will pass verifier arguments:
configuration file, report file, and sequence, and server arguments: port, and key.
Parameters
----------
conf : str
configuration file on the remote machine where the verifier will execute
report_file : str
name of the report file that will be stored on the remote machine
variableDict : dict
a dictionary defining sequence of data type scanning
Returns
-------
key : str
a random string used for authentication
"""
# variableDict = {'PreDarkImages': 5,
# 'PreWhiteImages': 10,
# 'Projections': 60,
# 'PostDarkImages': 5,
# 'PostWhiteImages': 10}
sequence = []
index = -1
try:
images = variableDict['PreDarkImages']
index += images
sequence.append(('data_dark', index))
except KeyError:
pass
try:
images = variableDict['PreWhiteImages']
index += images
sequence.append(('data_white', index))
except KeyError:
pass
try:
images = variableDict['Projections']
index += images
sequence.append(('data', index))
except KeyError:
pass
try:
images = variableDict['PostDarkImages']
index += images
sequence.append(('data_dark', index))
except KeyError:
pass
try:
images = variableDict['PostWhiteImages']
index += images
sequence.append(('data_white', index))
except KeyError:
pass
json_sequence = json.dumps(sequence)
key = uuid.uuid4()
COMMAND="python " + VER_DIR + "server_verifier.py " + conf + ", " + report_file + ", " + json_sequence + \
", " + PORT + ", " + key
ssh = subprocess.Popen(["ssh", "%s" % HOST, COMMAND],
shell=False,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE)
# key will be used to stop verifier
return key
#ssh usr32idc@txmtwo "python /home/beams/USR32IDC/temp/server_verifier.py conf, report_file, sequence, port, key"
def stop_verifier(key):
"""
This method creates RemoteController instance that has a connection with remote server. Using this connection
the code calls a 'stop_process' method on the remote server that will stop the verifier process.
Then the connection is closed.
Parameters
----------
key : str
a string generated in start_verifier method, user as authentication key
Returns
-------
None
"""
class RemoteController:
def QueueServerClient(self, HOST, PORT, AUTHKEY):
class QueueManager(SyncManager):
pass
QueueManager.register('stop_verifier_process')
self.manager = QueueManager(address = (HOST, PORT), authkey = AUTHKEY)
self.manager.connect()
def stop_remote_process(self):
self.manager.stop_verifier_process()
try:
conn = self.manager._Client(address = (HOST, PORT), authkey = key)
conn.close()
except Exception:
pass
remote_controller = RemoteController()
# this will connect to the server
remote_controller.QueueServerClient(HOST, PORT, key)
# this will execute command on the server
remote_controller.stop_remote_process()
stop_verifier('abc')