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-rw-r--r--gitautodeploy/lock.py35
1 files changed, 15 insertions, 20 deletions
diff --git a/gitautodeploy/lock.py b/gitautodeploy/lock.py
index b0b408b..f894bb3 100644
--- a/gitautodeploy/lock.py
+++ b/gitautodeploy/lock.py
@@ -1,12 +1,15 @@
+from lockfile import LockFile
+
class Lock():
"""Simple implementation of a mutex lock using the file systems. Works on
*nix systems."""
path = None
- _has_lock = False
+ lock = None
def __init__(self, path):
self.path = path
+ self.lock = LockFile(path)
def obtain(self):
import os
@@ -14,39 +17,31 @@ class Lock():
logger = logging.getLogger()
try:
- os.open(self.path, os.O_CREAT | os.O_EXCL | os.O_WRONLY)
- self._has_lock = True
+ self.lock.acquire(0)
logger.debug("Successfully obtained lock: %s" % self.path)
- except OSError:
+ except AlreadyLocked:
return False
- else:
- return True
+
+ return True
def release(self):
import os
import logging
logger = logging.getLogger()
- if not self._has_lock:
+ if not self.has_lock():
raise Exception("Unable to release lock that is owned by another process")
- try:
- os.remove(self.path)
- logger.debug("Successfully released lock: %s" % self.path)
- finally:
- self._has_lock = False
+
+ self.lock.release()
+ logger.debug("Successfully released lock: %s" % self.path)
def has_lock(self):
- return self._has_lock
+ return self.lock.i_am_locking()
def clear(self):
import os
import logging
logger = logging.getLogger()
- try:
- os.remove(self.path)
- except OSError:
- pass
- finally:
- logger.debug("Successfully cleared lock: %s" % self.path)
- self._has_lock = False \ No newline at end of file
+ self.lock.break_lock()
+ logger.debug("Successfully cleared lock: %s" % self.path)