semvec/pypi-packages huggingface dataset:
halo-app 0.10.92
this is the Halo framework library for domain app
License: MIT License

<p align="center">
  <img src="https://i.ibb.co/9V7gLNH/halo-plat.png" alt="Halo Serverless" border="0" height="250" width="500" />
</p>

# Halo

The **Halo** Lib is a python based library utilizing [**Serverless**](https://logz.io/blog/serverless-vs-containers/) technology and [**microservices architecture**](http://blog.binaris.com/your-guide-to-migrating-existing-microservices-to-serverless/) 
<p/>Halo provides the following features:

-  Flask development for AWS Lambda & Dynamodb
-  [correlation id across microservices](https://theburningmonk.com/2017/09/capture-and-forward-correlation-ids-through-different-lambda-event-sources/)
-  [structured json based logging](https://theburningmonk.com/2018/01/you-need-to-use-structured-logging-with-aws-lambda/)
-  [sample debug log in production](https://theburningmonk.com/2018/04/you-need-to-sample-debug-logs-in-production/)
-  [support for microservice transactions with the saga pattern](https://read.acloud.guru/how-the-saga-pattern-manages-failures-with-aws-lambda-and-step-functions-bc8f7129f900)
-  [using SSM Parameter Store over Lambda env variables](https://hackernoon.com/you-should-use-ssm-parameter-store-over-lambda-env-variables-5197fc6ea45b)
-  [Serverless Error Handling & trace id for end users](https://aws.amazon.com/blogs/compute/error-handling-patterns-in-amazon-api-gateway-and-aws-lambda/)
-  [Lambda timeout](https://blog.epsagon.com/best-practices-for-aws-lambda-timeouts) management for [slow HTTP responses](https://theburningmonk.com/2018/01/aws-lambda-use-the-invocation-context-to-better-handle-slow-http-responses/)
-  [ootb support for Idempotent service invocations (md5)](https://cloudonaut.io/your-lambda-function-might-execute-twice-deal-with-it/)

If you are building a Python web app running on AWS Lambda (Django or Flask), use this library to manage api transactions:

```
            sagax = load_saga("test", jsonx, schema)
            payloads = {"BookHotel": {"abc": "def"}, "BookFlight": {"abc": "def"}, "BookRental": {"abc": "def"},
                        "CancelHotel": {"abc": "def"}, "CancelFlight": {"abc": "def"}, "CancelRental": {"abc": "def"}}
            apis = {"BookHotel": self.create_api1, "BookFlight": self.create_api2, "BookRental": self.create_api3,
                    "CancelHotel": self.create_api4, "CancelFlight": self.create_api5, "CancelRental": self.create_api6}
            try:
                self.context = Util.get_lambda_context(request)
                ret = sagax.execute(self.req_context, payloads, apis)
                return {"saga": "good"}, 200
            except SagaRollBack as e:
                return {"saga": "bad"}, 500
```


## License

This project is licensed under the MIT License

## Acknowledgments

* Yan Cui - https://theburningmonk.com
* flowpl - https://github.com/flowpl/saga_py