Assumptions:

1. Default Rate Allowed : 5 requests / api key
2. Default suspend time : 1 min.

How to run the application? mvn clean package java -jar target/ratelimit-1.0-SNAPSHOT.jar

Mandatory Props:

1. City name
2. api key

Sample requests: curl -X GET
'http://localhost:8080/hotels/Bangkok?order=desc'
-H 'Cache-Control: no-cache'
-H 'Postman-Token: 20b466e8-bf93-468f-80b0-b504e4930370'
-H 'api_key: 1234'

curl -X GET
'http://localhost:8080/hotels/Ashburn?'
-H 'Cache-Control: no-cache'
-H 'Postman-Token: 20b466e8-bf93-468f-80b0-b504e4930370'
-H 'api_key: 1234'

Future Enhancements

1. Validate the API key.
2. Support rate limit at different API level.