Spring-Boot one @Scheduled task using multiple cron expressions from yaml file

Question

I like to have an implementation of one @Scheduled job using different configuration properties of .ymlfile.

Means in my yaml file I describe

Answer 1

(edit since I found a way to perform this)

You can actually do this. Below I'm showcasing a working example:

cronjob.yaml

job:
  schedules:
  - 10 * * * * *
  - 20 * * * * *

the actual task to perform MyTask:

package hello;

import org.springframework.stereotype.Component;

@Component
public class MyTask implements Runnable {

    @Override
    public void run() {
        //complicated stuff
    }
}

Your CronConfig as is:

package hello;

import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import java.util.List;

    @Configuration
    @ConfigurationProperties(prefix="job", locations = "classpath:cronjob.yml")
    public class CronConfig {

        private List schedules;

        @Bean
        public List schedules() {
            return this.schedules;
        }

        public List getSchedules() {
            return schedules;
        }

        public void setSchedules(List schedules) {
            this.schedules = schedules;
        }
    }

The ScheduledTask bean that is responsible to schedule all crons:

package hello;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.scheduling.TaskScheduler;
import org.springframework.scheduling.support.CronTrigger;
import org.springframework.stereotype.Component;

@Component
public class ScheduledTasks {

    @Autowired
    private TaskScheduler taskScheduler;

    @Autowired
    private CronConfig cronConfig;

    @Autowired
    private MyTask myTask;

    private static final Logger log = LoggerFactory.getLogger(ScheduledTasks.class);

    public void scheduleAllCrons() {

        cronConfig.getSchedules().forEach( cron -> taskScheduler.schedule(myTask, new CronTrigger(cron)) );
    }
}

The context/main class Application:

package hello;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.Bean;
import org.springframework.scheduling.TaskScheduler;
import org.springframework.scheduling.annotation.EnableAsync;
import org.springframework.scheduling.annotation.EnableScheduling;
import org.springframework.scheduling.concurrent.ConcurrentTaskScheduler;

@SpringBootApplication
@EnableScheduling
@EnableAsync
public class Application {

    @Bean
    public TaskScheduler taskScheduler() {
        return new ConcurrentTaskScheduler();
    }


    public static void main(String[] args) throws Exception {
        ApplicationContext ctx = SpringApplication.run(Application.class);

        ScheduledTasks scheduledTasks = ctx.getBean(ScheduledTasks.class);

        scheduledTasks.scheduleAllCrons();
    }
}