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    "info": {
        "author": "Justin Hammond",
        "author_email": "runningempty@gmail.com",
        "bugtrack_url": null,
        "classifiers": [
            "Development Status :: 2 - Pre-Alpha",
            "Environment :: Console",
            "Intended Audience :: Developers",
            "Intended Audience :: Information Technology",
            "License :: OSI Approved :: Apache Software License",
            "Operating System :: OS Independent",
            "Programming Language :: Python"
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        "description": "# fabnodes\n\n`fabnodes` is a Python CLI application that creates prefabricated lambda nodes.\nUsing these 'node prefabs' one can create complicated distributed processes.\n\n\n## Requirements\n\nThe python requirements are stored in requirements.txt. `fabnodes` currently uses\n[`cfndsl`](https://github.com/cfndsl/cfndsl) to generate CloudFormation\nJSON files. The instructions to install `cfndsl` is available through the\nprovided link.\n\n## Basic setup\n\nInstall the requirements:\n```\n$ pip install -r requirements.txt\n```\n\nRun the application:\n```\n$ python -m fabnodes --help\n```\n\nTo run the tests (todo):\n```\n    $ pytest\n```\n\n## Prefab: Basic Node\n\nThe Basic Node (`samples/basic_node/node.py`) will create the most basic node\nwith the following features:\n\n- `N` SQS inputs, where `N` can be 0 or greater\n- `M` SNS outputs, where `M` can be 0 or greater\n- 1 Lambda Function that triggers on any input, and can write to any output\n\nBelow is a masterpiece that will attempt to illustrate:\n\n```\n==========================================================================\n\n\n\n                                    |----------- Basic Node ----------|\n\n.. -> SNS(SomeNode.alpha) ----\\                          /--> SNS(output) -> ..\n                               ---> SQS(input) -> Lambda\n.. -> SNS(random topic)    ---/                          \\--> (something)\n\n\n\n==========================================================================\n```\n\nTo create this node your `cwd` needs to be the same as `node.py`:\n\n```\nfabnodes create node.py --account-arn XXXXXXXXXXXX\n```\n\nAt the moment the account-arn needs to be passed in because security.\n\nThis will make the calls required to CloudFormation that will create the above\ninfrastructure.\n\n### Use-cases:\n\nThe basic node has the following use-cases:\n\n- **The Source Node**: A node that reads from an input source (that isn't\n  another prefab node) that then can forward to many through a topic (`0:M`\n  node)\n- **The Router**: A node that takes an input and can 'farm' it out to\n  specifically made workers (other prefab nodes) through named topics (`1:M`\n  node)\n- **The Worker**: A node that listens on a topic, performs a specific task,\n  then creates output (`1:1` node)\n- **The Ingest**: A node that listens to many topics, consumes data, and then\n  produces output for a non-prefab node (`M:0` node)\n\n### The Sample: node.py\n\nBelow is an explanation of the provided sample.\n\n```\n@fablib.Distribution('jlh-dev-lambda-functions')\n@fablib.Inputs([\n    {'name': 'Router', 'source': 'snsRouterTopicId'}])\n@fablib.Outputs([\n    {'name': 'Alpha'}])\n@fablib.Node('BasicNode', 'comRoaetFabnodeSample', 'Basic Node')\ndef lambda_handler(events, context):\n    client = boto3.client('sns')\n    sns_target_arn = os.environ['Alpha']\n    body_content = json.dumps(events)\n    response = client.publish(\n        TargetArn=sns_target_arn,\n        Message=json.dumps({'default': body_content}),\n        MessageStructure='json'\n    )\n    print(response)\n```\n\n- The `lambda_handler` method is defined exactly as a normal lambda handler\n- The decorators:\n  - `Distribution`: defines the S3 bucket to put the code into\n  - `Inputs` (a list of dictionaries): creates an SQS trigger that is subscribed\n    to the defined SNS topic\n  - `Outputs` (a list of dictionaries): creates an SNS topic that can be\n    referenced in the `os.environ` dictionary\n  - `Node`: defines the name of the lambda function, the name of the stack, and\n    the description of the stack\n    - The name of the stack can be used as a reference in other prefabs to\n      create the input/output connections\n\n## References\n\n`fabnodes` is a Python CLI application generated from https://github.com/roaet/rorochip-cookies",
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