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#!/usr/bin/env python
#############################################################################
##
## This file is part of Taurus
##
## http://taurus-scada.org
##
## Copyright 2011 CELLS / ALBA Synchrotron, Bellaterra, Spain
##
## Taurus is free software: you can redistribute it and/or modify
## it under the terms of the GNU Lesser General Public License as published by
## the Free Software Foundation, either version 3 of the License, or
## (at your option) any later version.
##
## Taurus 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 Lesser General Public License for more details.
##
## You should have received a copy of the GNU Lesser General Public License
## along with Taurus. If not, see <http://www.gnu.org/licenses/>.
##
#############################################################################
"""This module contains the base taurus operation classes"""
__all__ = ["TaurusOperation", "WriteAttrOperation"]
__docformat__ = "restructuredtext"
from .util.log import Logger
class TaurusOperation(Logger):
def __init__(self, name='TaurusOperation', parent=None, callbacks = None):
self.call__init__(Logger, name, parent)
if callbacks is None: callbacks = []
self._callbacks = callbacks
self._dangerMessage = None
self._isDangerous = False
def getDevice(self):
pass
def setCallbacks(self, callbacks):
self._callbacks = callbacks
def getCallbacks(self):
return self._callbacks
def execute(self):
for f in self._callbacks:
f(operation = self)
def isDangerous(self):
return self._isDangerous
def setDangerMessage(self, dangerMessage=None):
'''if dangerMessage is None, the operation is considered safe'''
self._dangerMessage = dangerMessage
self._isDangerous = dangerMessage is not None
def getDangerMessage(self):
return self._dangerMessage
def resetDangerMessage(self):
self.setDangerMessage(None)
class WriteAttrOperation(TaurusOperation):
def __init__(self, attr, value, callbacks = None):
self.call__init__(TaurusOperation, 'WriteAttrOperation', attr, callbacks=callbacks)
self.attr = attr
self.value = value
def execute(self):
self.attr.write(self.value)
TaurusOperation.execute(self)
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