Lock a file.
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Detailed Description
Lock a file.
The file for the lock is created if it doesn't exists and it the "temporary" argument is set to True it will also be deleted when the lock is not needed. The unlocking is done in the destructor (RAII pattern).
Definition at line 131 of file locker.py.
Constructor & Destructor Documentation
| def locker::LockFile::__init__ |
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self, |
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name, |
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temporary = False |
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) |
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Definition at line 132 of file locker.py.
00133 :
00134 self.name = name
00135 self.temporary = temporary
00136 self.file = None
00137 self.log = logging.getLogger("LockFile")
00138 self.log.info("%s - Locking on %s", time.strftime("%Y-%m-%d_%H:%M:%S"), self.name)
00139 if not os.path.exists(name):
00140 mode = "w"
00141 else:
00142 self.temporary = False
00143 mode = "r+"
00144 try:
00145 self.file = open(self.name, mode)
00146 lock(self.file)
00147 except:
self.log.warning("Cannot acquire lock on %s", self.name)
| def locker::LockFile::__del__ |
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self ) |
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Definition at line 148 of file locker.py.
00149 :
00150 if self.file:
00151 unlock(self.file)
00152 self.file.close()
00153 if self.temporary:
00154 try:
00155 os.remove(self.name)
00156 except:
00157 pass
00158 self.log.info("%s - Lock on %s released", time.strftime("%Y-%m-%d_%H:%M:%S"), self.name)
00159
Member Data Documentation
The documentation for this class was generated from the following file:
- /afs/.cern.ch/sw/Gaudi/releases/GAUDI/GAUDI_v22r2/GaudiPolicy/scripts/locker.py
