Stop a scheduling job from rest endpoint - spring-boot

Question

I am doing a Spring Boot Project
This is the main class
#SpringBootApplication
#ComponentScan(basePackages="blabla.quartz")
#EnableScheduling
public class App
{
public static void main( String[] args )
{
ConfigurableApplicationContext context =SpringApplication.run(App.class, args);
}
}
This is the controller
#RestController
public class Controller {
#Autowired
private SampleTask m_sampletask;
#Autowired TaskScheduler taskScheduler;
ScheduledFuture scheduledFuture;
int jobid=0;
#RequestMapping(value = "start/{job}", method = RequestMethod.GET)
public void start(#PathVariable String job) throws Exception {
m_sampletask.addJob(job);
Trigger trigger = new Trigger(){
#Override
public Date nextExecutionTime(TriggerContext triggerContext) {
org.quartz.CronExpression cronExp=null;
CronSequenceGenerator generator = new CronSequenceGenerator("0 * * ? * *");
Date nextExecutionDate = generator.next(new Date());
System.out.println(nextExecutionDate);
return nextExecutionDate;
}
};
scheduledFuture = taskScheduler.schedule(m_sampletask, trigger);
}
}
This is the ScheduleConfigurer implementation
#Service
public class MyTask implements SchedulingConfigurer{
#Bean
public TaskScheduler taskScheduler() {
ThreadPoolTaskScheduler scheduler = new ThreadPoolTaskScheduler();
scheduler.setThreadNamePrefix("somegroup-");
scheduler.setPoolSize(10);
scheduler.setWaitForTasksToCompleteOnShutdown(true);
scheduler.setAwaitTerminationSeconds(20);
return scheduler;
}
#Override
public void configureTasks(ScheduledTaskRegistrar taskRegistrar) {
}
}
This is the class which I am calling from controller as scheduled job
#Component
public class SampleTask implements Runnable{
private List<String> jobs=new ArrayList<String>();
private String jobName;
public void addJob(String job){
jobName=job;
}
#Override
public void run() {
System.out.println("Currently running "+jobName);
}
}
How to stop the schedule job by a rest endpoint(Suppose "/stop/{jobname}").. When I have started the job using the "/start/{jobname}" rest endpoint?

Answer 1

You will probably need to use the quartz scheduler (if not already), and add a service with the required methods, then inject that service into your controller.
There's a decent example here: https://github.com/javabypatel/spring-boot-quartz-demo
If you want an in-memory job store (that isn't a database), checkout the RAMJobStore: http://www.quartz-scheduler.org/documentation/quartz-2.x/configuration/ConfigRAMJobStore.html
Stop Example
This is an excerpt from the demo project. Credit goes to Jayesh Patel: https://github.com/javabypatel
/**
* Stop a job
*/
#Override
public boolean stopJob(String jobName) {
System.out.println("JobServiceImpl.stopJob()");
try{
String jobKey = jobName;
String groupKey = "SampleGroup";
Scheduler scheduler = schedulerFactoryBean.getScheduler();
JobKey jkey = new JobKey(jobKey, groupKey);
return scheduler.interrupt(jkey);
} catch (SchedulerException e) {
System.out.println("SchedulerException while stopping job. error message :"+e.getMessage());
e.printStackTrace();
}
return false;
}