REST service, that returns content sorted by UCB1 algorithm. (Multi-Armed Bandit algorithm)
Spring Boot, Kotlin

Task description here
Restrictions:
Caching is used in service.
In case of deployment many instances of the service - take a look at the external cache provider (Redis).

Environment

1. Run MongoDB

docker run --rm --name mongo-server -p 27017-27019:27017-27019 -v /opt/mongodb_volume:/data/db -d mongo

where /opt/mongodb_volume - your local data volume for mongo

2. Run service ./gradlew clean bootRun

Endpoints

• Get list of content, using UCB1 /play/{userId}
• Add new content /content/add?id={id}&createdOn={unix_timestamp}
• Get content info /content/{id}
• Add view to content /content/{id}/views/add?userId={userId}&watchedOn={unix_timestamp}
• Add like to content /content/{id}/likes/add?userId={userId}&likedOn={unix_timestamp}

Tests

• Test coverage is not complete. Only examples of test are provided
• Example of performance test here