keyvalues

usage

Setup

Before running, you need to have:

• 8080 port free. Checkup using

lsof -i tcp:8080

• maven and proper settings.xml with a valid repo
• jdk8

Building and running

mvn clean install
mvn dependency:copy-dependencies
java -cp "target/dependency/*:target/keyvalues.jar" com.twitter.App

Logs

• All logs should be in log4j-application.log under the root project directory.

examples

This root GET returns the size of the current key map

curl localhost:8080 

This POST creates a key=http/port with value=443

curl --data "value=443" localhost:8080/http/port 

This creates a callback on http/port with url=http://www.example.com

curl --data "url=http://www.example.com" localhost:8080/http/port/callback

This GET returns a list of callbacks for http/port in JSON format.

curl localhost:8080/http/port/callback
[{"name":callback-1,"url":"http://www.example.com"}]

This Delete deletes an existing callback for http/port

curl -X DELETE "localhost:8080/http/port/callback/callback-1"

Assumptions and Limitations

• If calling callback fails (callback host not responding, callback host error, or anything other than an ovbious false), it returns true by default for checks.
• The callback-id is strictly increasing, even with some deletion happening in between. This can be solved by using a bitset of 32 bits (int) to record used ids, and keep a min for unused id. (TODO)
• Root resource (localhost:8080) returns the size of the key/value map, as a string.