RealTime Transaction Statistics API

This RealTime Statistics API displays the use of Spring Boot and it Scheduling capabilities. It also demonstrates Servlet 3.1 based Asynchronous request processing and friendly error reporting in a REST Api.

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The API has the following endpoints: -

• GET /statistics -> provides a transaction summary of the last 60 seconds. It's calculated in O(1) time & space complexity ('is constant to the number of secs in a minute'). This can be further improved by using a Min/Max Queue and a always calculated Statistics object of the last 60 seconds (still O(1) complexity). It utilizes Servlet 3.1's asynchronous request processing capabilities.

• POST /transactions -> create a transaction.

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The API supports HATEOAS for seamless discoverability.

• To run the project cd into the project directory and type ./gradlew clean bootRun and then browse to http://localhost:8080 for more information.