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        "author": "Zope Foundation and Contributors",
        "author_email": "zope-dev@zope.org",
        "bugtrack_url": null,
        "classifiers": [
            "Development Status :: 4 - Beta",
            "Environment :: Web Environment",
            "Framework :: Zope3",
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            "Natural Language :: English",
            "Operating System :: OS Independent",
            "Programming Language :: Python",
            "Topic :: Internet :: WWW/HTTP"
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        "description": "cipher.background\n=================\n\nA library for creating background threads that can talk to the ZODB and use\nlocal site components.\n\nWe're probably reinventing Celery.\n\n\nExample\n-------\n\nLet's assume we have a DMS with a simple publication workflow. We\nhave two states \"DRAFT\" and \"PUBLISH\". The Problem in this example\nis: that the transition form \"DRAFT\" to \"PUBLISH\" takes some minutes,\nand we don't want the user to be waiting.\n\nFirst we have create a WorkflowTransition-BackgroundThread:\n\n.. code-block:: python\n\n    class MyWorkflowTransition(BackgroundWorkerThread):\n        execute = True\n        description = \"background worker thread (%(class_name)s) for %(site_name)s User %(user_name)s\"\n\n        def __init__(self, site_db, site_oid, site_name, user_name, daemon=True, object_oid=None):\n            self.object_oid = object_oid\n            super(MyWorker, self).__init__(site_db, site_oid, site_name, user_name, daemon=True)\n\n        def scheduleNextWork(self):\n            return self.execute\n\n        def getObjectFromOID(self):\n            conn = getSite()._p_jar\n            return conn.get(self.object_oid)\n\n        def doWork(self):\n            sleep(15) # This is our long TASK\n            self.execute = False\n            document = self.getObjectFromOID()\n            document.wf_status = \"PUBLISHED\"\n\n\nWe have a simple Document with an initial Workflow-State draft.\n\n.. code-block:: python\n\n   class Document(Persistent):\n       wf_state = \"DRAFT\"\n\n\nNow we have to call our WorkflowTransition.\n\n.. code-block:: python\n\n    def setWorkflow(site, document_oid, user_name):\n        worker = MyWorkflowTransition(\n            site_db = site._p_jar.db(), \n            site_oid = site._p_oid,\n            site_name = site.__name__,\n            user_name = user_name,\n            object_oid = document_oid,\n            )\n        worker.start()\n\nWhen calling worker.start() the thread goes into \"Background\" and the user\ndon't have to wait until the Transition is finished.\n\n\n\n=======\nCHANGES\n=======\n\n\n1.0.2 (2012-07-31)\n------------------\n\n- Refactor BackgroundWorkerThread to have the site returned from getSite()\n\n\n1.0.1 (2012-04-05)\n------------------\n\n\n1.0.0 (2012-02-10)\n------------------\n\n- Initial release as a separate package.",
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        "keywords": "CipherHealth background thread ZODB",
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