key-value persistent store

A service that exposes a REST API that allows users to create, update, delete, and retrieve answers as key-value pairs. The answers are stored in a Postgres DB, so they can handle service restarts.

An answer is defined as:

{
  "key" : "name",
  "value" : "Eyal"
}

An event is defined as:

{
  "event" : "create",
  "data" : 
  {
    "key": "name",
    "value": "Eyal"
  }
}

API

The API exposes the following endpoints:

• Get answer for a given key (returns the latest answer for the given key): GET /answers/:key
• Create answer: POST /answers
• Update answer: PUT /answers
• Delete answer: DELETE /answers/:key
• Get history for a given key (returns an array of events in chronological order): GET /answers/:key/history

HOW TO RUN

Pre-requisites

1. Have docker and docker-compose installed and a docker engine running.
2. Have ports 5432 and 8080 available.

To first build and run the application, run:

make install

For later runs, use:

make start

To stop the application run:

make stop