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distributed-spring-scheduler

A simple extension of spring @Scheduled that can execute tasks on a clustered environment.A new annotation controls.

with some strategy:

  • leader only
  • parallel
  • specifcHost

eg:

@Scheduled(cron = "0 0/1 * * * ?")
@LeaderTaskType(type = LeaderTaskTypeEnum.LEADER_ONLY)
public void printPerMin(){
    log.info(new Date().toString());

}

@Scheduled(cron = "0 0/1 * * * ?")
@LeaderTaskType(type = LeaderTaskTypeEnum.LEADER_ONLY,specificHost = "192.168.1.3")
//if specificHost set, type discard will be discarded.
public void printPerMin() {
  log.info(new Date().toString());
}

it shows a task only been excuted in a leader node.

nodes LEADER_ONLY PARALLEL specifcHost="192.168.1.3"
192.168.1.1(leader) 1 1 0
192.168.1.2 0 1 0
192.168.1.3 0 1 1