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    "# Eventing\n",
    "\n",
    "Under [working with proxy.py](welcome.ipynb) we saw that plugin instances are not global.  So, how to manage shared data?  You have 2 options:\n",
    "\n",
    "1. Use in-built Python provided concepts of shared memory in a `multiprocessing` environment.\n",
    "2. Use `proxy.py` provided eventing core\n",
    "\n",
    "`proxy.py` provides an in-built mechanism to publish and subscribe to messages between processes within a running instance.  With a pubsub facility in hand, we can develop variety of models e.g. multi-producer-single-subscriber model.  Imagine, publishing one or multiple messages from your plugin instances (per-request) and then processing them in near real-time within a single subscriber thread."
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