backend/pom.xml

@@ -21,6 +21,11 @@
 			<groupId>org.springframework.boot</groupId>
 			<artifactId>spring-boot-starter-data-jpa</artifactId>
 		</dependency>
+		<dependency>
+			<groupId>org.quartz-scheduler</groupId>
+			<artifactId>quartz</artifactId>
+			<version>2.3.2</version>
+		</dependency>
 		<dependency>
 			<groupId>org.springframework.boot</groupId>
 			<artifactId>spring-boot-starter-security</artifactId>

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

@@ -1,8 +1,29 @@
 package core.services.ntfy;
 
-public class NtfyTask implements Runnable{
+import org.quartz.Job;
+import org.quartz.JobExecutionContext;
+import org.quartz.JobExecutionException;
+
+import java.io.IOException;
+import java.net.*;
+import java.net.http.HttpClient;
+import java.net.http.HttpRequest;
+import java.net.http.HttpResponse;
+
+public class NtfyTask implements Job {
     @Override
-    public void run() {
-        System.out.println("A little Test");
+    public void execute(JobExecutionContext jobExecutionContext) throws JobExecutionException {
+        HttpClient httpClient = HttpClient.newHttpClient();
+
+        try {
+            HttpRequest request = HttpRequest.newBuilder()
+                    .uri(new URI("http://localhost:4280/Test"))
+                    .POST(HttpRequest.BodyPublishers.ofString("A simple testmessage"))
+                    .build();
+
+            httpClient.sendAsync(request, HttpResponse.BodyHandlers.ofString());
+        } catch (URISyntaxException e) {
+            throw new RuntimeException(e);
+        }
     }
 }

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

@@ -1,21 +1,38 @@
 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;
+import org.quartz.*;
+import org.quartz.impl.StdSchedulerFactory;
+
+import java.time.LocalDateTime;
+import java.time.ZoneId;
+import java.util.Date;
 
 public class TaskSchedulingService {
 
 
-   public static void scheduleTask() {
-       ThreadPoolTaskScheduler threadPoolTaskScheduler = new ThreadPoolTaskScheduler();
-       threadPoolTaskScheduler.initialize();
-       threadPoolTaskScheduler.schedule(new NtfyTask(), new CronTrigger("0 0/1 * 1/1 * *"));
+   public static void scheduleTask() throws SchedulerException {
+       Scheduler scheduler = StdSchedulerFactory.getDefaultScheduler();
+       scheduler.start();
+
+       JobDetail job = JobBuilder.newJob(NtfyTask.class).withIdentity("Job 1", "Group 1").build();
+       JobDetail job2 = JobBuilder.newJob(NtfyTask.class).withIdentity("Job 2", "Group 1").build();
+
+       LocalDateTime executionTime = LocalDateTime.of(2024, 3, 14, 9, 18); // Example: March 15, 2024, 10:00 AM
+
+       Trigger trigger = TriggerBuilder.newTrigger()
+               .withIdentity("trigger1", "Group 1")
+               .startAt(calculateDelayInMillis(executionTime)).build();
+       Trigger trigger2 = TriggerBuilder.newTrigger()
+               .withIdentity("trigger2", "Group 1")
+               .startAt(calculateDelayInMillis(executionTime.plusMinutes(1))).build();
+
+       Trigger immediatly = TriggerBuilder.newTrigger().withIdentity("Immediately", "Group 1").startNow().build();
+
+       scheduler.scheduleJob(job, immediatly);
+   }
+
+    private static Date calculateDelayInMillis(LocalDateTime executionTime) {
+        return  Date.from(executionTime.atZone(ZoneId.systemDefault()).toInstant());
     }
 }