redis-leader-by-lock

Simple implementation of Cluster Leadership Election using redis lock

Using Spring-Boot and Redis only

Motivation

Almost all examples of Leadership Election using Spring Boot go to Spring Cloud Cluster in Hazelcast (now deprecated) and Zookeeper(overpower in simple cases), and that's kinda strange, since Redis can use Set Lock to create an almost trivial Leadership Election. That's why I did it.

Requirements

Java 8

Maven

Redis

Running

mvn clean install

(in four different terminals, so you can see the outputs)

java -jar target/redis-leader-by-lock-0.0.1-SNAPSHOT.jar --server.port=8081

java -jar target/redis-leader-by-lock-0.0.1-SNAPSHOT.jar --server.port=8082

java -jar target/redis-leader-by-lock-0.0.1-SNAPSHOT.jar --server.port=8083

java -jar target/redis-leader-by-lock-0.0.1-SNAPSHOT.jar --server.port=8084

The console log will (hopefully) tell you what's happening

###Things to look Almost everything is happening in LeaderWrapper. Take a look at the source code, it's really simple

#Important

Please, oh please, if I did anything wrong, let me know and I will fix it