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توضیحات

A 'dogpile' lock, typically used as a component of a larger caching solution

ویژگی	مقدار
سیستم عامل	-
نام فایل	dogpile.core-0.4.1
نام	dogpile.core
نسخه کتابخانه	0.4.1
نگهدارنده	[]
ایمیل نگهدارنده	[]
نویسنده	Mike Bayer
ایمیل نویسنده	mike_mp@zzzcomputing.com
آدرس صفحه اصلی	http://bitbucket.org/zzzeek/dogpile.core
آدرس اینترنتی	https://pypi.org/project/dogpile.core/
مجوز	BSD

dogpile.core ============ A "dogpile" lock, one which allows a single thread to generate an expensive resource while other threads use the "old" value, until the "new" value is ready. Dogpile is basically the locking code extracted from the Beaker package, for simple and generic usage. Usage ----- A simple example:: from dogpile.core import Dogpile # store a reference to a "resource", some # object that is expensive to create. the_resource = [None] def some_creation_function(): # create the resource here the_resource[0] = create_some_resource() def use_the_resource(): # some function that uses # the resource. Won't reach # here until some_creation_function() # has completed at least once. the_resource[0].do_something() # create Dogpile with 3600 second # expiry time dogpile = Dogpile(3600) with dogpile.acquire(some_creation_function): use_the_resource() Above, ``some_creation_function()`` will be called when ``Dogpile.acquire()`` is first called. The remainder of the ``with`` block then proceeds. Concurrent threads which call ``Dogpile.acquire()`` during this initial period will be blocked until ``some_creation_function()`` completes. Once the creation function has completed successfully the first time, new calls to ``Dogpile.acquire()`` will call ``some_creation_function()`` each time the "expiretime" has been reached, allowing only a single thread to call the function. Concurrent threads which call ``Dogpile.acquire()`` during this period will fall through, and not be blocked. It is expected that the "stale" version of the resource remain available at this time while the new one is generated. dogpile.core is at the core of the `dogpile.cache <http://bitbucket.org/zzzeek/dogpile.cache>`_ package which provides for a basic cache API and sample backends based on the dogpile concept. Development Status ------------------- dogpile.core has been in use in a small number of production environments for a period of months, and as of 0.3.2 has entered beta status. No issues have been reported yet with its core synchronization model, and overall the project hasn't seen many changes. Most development continues within dogpile.cache.

نحوه نصب

نصب پکیج whl dogpile.core-0.4.1:

pip install dogpile.core-0.4.1.whl

نصب پکیج tar.gz dogpile.core-0.4.1:

pip install dogpile.core-0.4.1.tar.gz