Simple locking mechanism for Python 2.7 GAE, using memcache

Import the UUIDLock class in any app engine module

from memcache_lock import UUIDLock 

Acquire the lock

lock_helper = UUIDLock(key='lock_key') lock_helper.lock() 

Release the lock

lock_helper.release() 

Send default_timeout in secs to change the time after with the lock will be released automatically

lock_helper = UUIDLock(key='lock_key', default_timeout=3600) 

NOTE: default value for timeout is 24 hours

Send force_lock as True to acquire lock even if some other application already has lock on the key

lock_helper = UUIDLock(key='lock_key', force_lock=True) 

NOTE: default value for force_lock is False

Send max_wait_time in secs to raise Exception if lock is not acquired after waiting for max_wait_time

lock_helper = UUIDLock(key='lock_key', max_wait_time=120) 

NOTE: default value for max_wait_time is 60 secs