Implement a small example dynamic schedule

backend/src/main/java/core/DemoApplication.java

@@ -5,12 +5,16 @@ import core.entities.UserRole;
 import core.repositories.RoleRepository;
 import core.repositories.UserRepository;
 import core.services.PropertyService;
+import core.services.TaskScheduleService;
+import core.services.ntfy.TaskSchedulingService;
 import org.springframework.boot.CommandLineRunner;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 import org.springframework.context.annotation.Bean;
+import org.springframework.scheduling.annotation.EnableScheduling;
 
 @SpringBootApplication
+@EnableScheduling
 public class DemoApplication{
 
 	public static void main(String[] args) {
@@ -18,19 +22,10 @@ public class DemoApplication{
 	}
 
 
-	/*@Bean
-	public CommandLineRunner init(RoleRepository roleRepository, UserRepository userRepository, PropertyService propertyService) {
+	@Bean
+	public CommandLineRunner init() {
 		return args -> {
-			for (UserRole userRole :  UserRole.values()) {
-				if(!roleRepository.existsByName(userRole)) {
-					roleRepository.save(new RoleEntity(userRole));
-				}
-			}
-
-			propertyService.init();
-
-			FirstUserObserver observer = new FirstUserObserver(userRepository);
-			observer.start();
+			TaskSchedulingService.scheduleTask();
 		};
-	}*/
+	}
 }

backend/src/main/java/core/services/ntfy/NtfyTask.java

@@ -0,0 +1,8 @@
+package core.services.ntfy;
+
+public class NtfyTask implements Runnable{
+    @Override
+    public void run() {
+        System.out.println("A little Test");
+    }
+}

backend/src/main/java/core/services/ntfy/TaskSchedulingService.java

@@ -0,0 +1,21 @@
+package core.services.ntfy;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.scheduling.TaskScheduler;
+import org.springframework.scheduling.concurrent.ThreadPoolTaskScheduler;
+import org.springframework.scheduling.support.CronTrigger;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.TimeZone;
+import java.util.concurrent.ScheduledFuture;
+
+public class TaskSchedulingService {
+
+
+   public static void scheduleTask() {
+       ThreadPoolTaskScheduler threadPoolTaskScheduler = new ThreadPoolTaskScheduler();
+       threadPoolTaskScheduler.initialize();
+       threadPoolTaskScheduler.schedule(new NtfyTask(), new CronTrigger("0 0/1 * 1/1 * *"));
+   }
+}

backend/src/main/resources/application.properties

@@ -27,6 +27,7 @@ spring.jpa.open-in-view=false
 
 
 
+
 # Spring Data Rest Setup
 spring.data.rest.base-path=/api