locker::LockFile Class Reference

Lock a file. More...

List of all members.

Public Member Functions
def	__init__
def	__del__
Public Attributes
	name
	temporary
	file
	log

---

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.

---

Member Function Documentation

def locker::LockFile::__init__	(		self,
			name,
			temporary = False
	)

Definition at line 132 of file locker.py.

00132                                                :
00133         self.name = name
00134         self.temporary = temporary
00135         self.file = None
00136         self.log = logging.getLogger("LockFile")
00137         self.log.info("%s - Locking on %s", time.strftime("%Y-%m-%d_%H:%M:%S"), self.name)
00138         if not os.path.exists(name):
00139             mode = "w"
00140         else:
00141             self.temporary = False # I do not want to delete a file I didn't create
00142             mode = "r+"
00143         try:
00144             self.file = open(self.name, mode)
00145             lock(self.file)
00146         except:
00147             self.log.warning("Cannot acquire lock on %s", self.name)
    def __del__(self):

def locker::LockFile::__del__

(

self

)

Definition at line 148 of file locker.py.

                     :
        if self.file:
            unlock(self.file)
            self.file.close()
            if self.temporary:
                try:
                    os.remove(self.name)
                except:
                    pass
            self.log.info("%s - Lock on %s released", time.strftime("%Y-%m-%d_%H:%M:%S"), self.name)

---

Member Data Documentation

locker::LockFile::name

Definition at line 133 of file locker.py.

locker::LockFile::temporary

Definition at line 134 of file locker.py.

locker::LockFile::file

Definition at line 135 of file locker.py.

locker::LockFile::log

Definition at line 136 of file locker.py.

---

The documentation for this class was generated from the following file:

• /afs/cern.ch/sw/Gaudi/releases/GAUDI/GAUDI_v21r9/GaudiPolicy/scripts/locker.py