Start a new Schedule Job by rest call in Spring Boot - spring-boot

Question

I am doing a spring boot project. Here is main method and a controller method
#SpringBootApplication
#ComponentScan(basePackages="nokia.quartz")
#EnableScheduling
public class App
{
public static void main( String[] args )
{
ConfigurableApplicationContext context =SpringApplication.run(App.class, args);
}
}
Controller:
#RestController
public class Controller {
#Autowired
private SampleTask m_sampletask;
#RequestMapping(value = "start", method = RequestMethod.GET)
public void start() throws Exception {
m_sampletask.work();
}
}
And a Sample class
#Component
public class SampleTask {
String cron_expression="0 0/1 * * * ?";
public void work() {
System.out.println("");
}
}
What the problem here is the rest call "/start" should make the SampleTask work() method a schedule job with the given cron expression when I am calling it from from rest endpoint "/start". Also I should be able to configure it at runtime with another rest endpoint as well as stop it..

Answer 1

You can make use combination of #EnableScheduling annotation and #Scheduled(cron= 0 0/1 * * * ?) for creating a scheduler in Spring boot.
Please add #EnableScheduling at starting of App Class and #Scheduled to the method which you want to run using cron.
PFB the useful link.
https://spring.io/guides/gs/scheduling-tasks/
You can try below option
#Autowired
TaskScheduler taskScheduler;
ScheduledFuture<?> scheduledFuture;
#RequestMapping(value = "start", method = RequestMethod.GET)
public void start() throws Exception {
scheduledFuture = taskScheduler.scheduleAtFixedRate(m_sampletask.work(), FIXED_RATE);
}
Runnable Code of Nawaz:
#Component
public class SampleTask implements Runnable {
String cron_expression="0 0/1 * * * ?";
#Override public void run() { System.out.println("Hello"); }
}