clean PLC log only if there is something to clean

Otherwise exception happens in Beremiz service.

Traceback (most recent call last):
File "/home/developer/WorkData/PLC/beremiz/beremiz/connectors/PYRO/_init_.py", line 113, in catcher_func
return func(*args, **kwargs)
File "/home/developer/WorkData/PLC/beremiz/beremiz/connectors/PYRO/_init_.py", line 194, in my_local_func
return RemotePLCObjectProxy._getattr_(attrName)(*args, **kwargs)
File "/usr/lib/python2.7/dist-packages/Pyro/core.py", line 381, in _call_
return self._send(self._name, args, kwargs)
File "/usr/lib/python2.7/dist-packages/Pyro/core.py", line 456, in _invokePYRO
return self.adapter.remoteInvocation(name, Pyro.constants.RIF_VarargsAndKeywords, vargs, kargs)
File "/usr/lib/python2.7/dist-packages/Pyro/protocol.py", line 457, in remoteInvocation
return self._remoteInvocation(method, flags, *args)
File "/usr/lib/python2.7/dist-packages/Pyro/protocol.py", line 532, in _remoteInvocation
answer.raiseEx()
File "/usr/lib/python2.7/dist-packages/Pyro/errors.py", line 72, in raiseEx
raise self.excObj
AttributeError: 'PLCObject' object has no attribute '_ResetLogCount'
+--- This exception occured remotely (Pyro) - Remote traceback:
Traceback (most recent call last):
File "/usr/lib/python2.7/dist-packages/Pyro/protocol.py", line 719, in _handleInvocation2
res = obj.Pyro_dyncall(req[1],flags,req[3]) # (method,flags,args)
File "/usr/lib/python2.7/dist-packages/Pyro/core.py", line 108, in Pyro_dyncall
return getattr(self.delegate or self,method) (args,*keywords)
File "/home/developer/WorkData/PLC/beremiz/beremiz/runtime/PLCObject.py", line 101, in ResetLogCount
if self._ResetLogCount is not None:
AttributeError: 'PLCObject' object has no attribute '_ResetLogCount'
+--- End of remote traceback

     1

#!/usr/bin/env python

     2

# -*- coding: utf-8 -*-

     3

     4

# This file is part of Beremiz runtime.

     5

#

     6

# Copyright (C) 2007: Edouard TISSERANT and Laurent BESSARD

     7

#

     8

# See COPYING.Runtime file for copyrights details.

     9

#

    10

# This library is free software; you can redistribute it and/or

    11

# modify it under the terms of the GNU Lesser General Public

    12

# License as published by the Free Software Foundation; either

    13

# version 2.1 of the License, or (at your option) any later version.

    14

    15

# This library is distributed in the hope that it will be useful,

    16

# but WITHOUT ANY WARRANTY; without even the implied warranty of

    17

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

    18

# Lesser General Public License for more details.

    19

    20

# You should have received a copy of the GNU Lesser General Public

    21

# License along with this library; if not, write to the Free Software

    22

# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA

    23

    24

    25

import os

    26

    27

from PLCObject import PLCObject, PLCprint

    28

import ServicePublisher