Test Task (Juno Inc.): In-memory cache

Task definition taken from here

Description

Simple implementation of Redis-like in-memory cache

Desired features:

• Key-value storage with string, lists, dict support
• Per-key TTL
• Operations:
  • Get
  • Set
  • Remove
• Golang API client
• Provide some tests, API spec, some deployment manual, some examples of client usages would be nice.

Optional features:

• Telnet-like/HTTP-like API protocol
• performance tests
• Operations:
  • Keys

Build using Gradle

./gradlew goBuild

Result binaries will be placed into ./gogradle folder

Put application into Docker image:

docker build -t apunko/go-cache .

Start application

Start application on default port 8000:

On Linux OS:

./.gogradle/linux_amd64_go-cache

On Win OS:

./.gogradle/windows_amd64_go-cache.exe

Start application on user defined port (8005 for example):

On Linux OS:

./.gogradle/linux_amd64_go-cache 8005

On Win OS:

./.gogradle/windows_amd64_go-cache.exe 8005

Start Docker container using docker command:

docker run --rm -p 8000:8000 apunko/go-cache

Or start Docker container using docker-compose command:

docker-compose up

Interact with application

Cache population with some key-value pairs:

curl -i -X POST -H "Accept: application/json" -H "Content-Type: application/json" -d '{"value": "Ivan", "ttl": 60000000000}' http://localhost:8000/items/name

curl -i -X POST -H "Accept: application/json" -H "Content-Type: application/json" -d '{"value": ["VISA", "Mastercard"], "ttl": 60000000000}' http://localhost:8000/items/cards

curl -i -X POST -H "Accept: application/json" -H "Content-Type: application/json" -d '{"value": {"Math": "9", "English": "7"}, "ttl": 60000000000}' http://localhost:8000/items/marks

Getting value by key=name from cache:

curl -i http://localhost:8000/items/name

Getting all keys from cache:

curl -i http://localhost:8000/items/keys

Deletion of some key-value pair from cache for key=name:

curl -i -X DELETE http://localhost:8000/items/name

Cache cleanup:

curl -i -X DELETE http://localhost:8000/items/keys