Question

In django when updating a global dictionary data structure I want to lock access to it by different request. I am planning to have a wrapper function to update and access and synchronize it. Coming from Java background! Any pointers?

Answer 1

Extending the LockableDict example somewhat, to make it a little more robust you can use the real Lock:

class LockableDict(dict):
    def __init__(self, *args, **kwargs):
        from threading import Lock
        self.lock = Lock()
        dict.__init__(self, *args, **kwargs)

    @property
    def locked(self):
        return self.lock.locked()

    def lock(self):
        self.lock.acquire()

    def unlock(self):
        self.lock.release()

# and then
my_dict = LockableDict({1:2, 3:4})
my_dict.lock()
# do modifications
my_dict.unlock()