Added Post system. Notification system

src/main/java/site/easystartup/web/notification/controller/NotificationController.java

@@ -0,0 +1,28 @@
+package site.easystartup.web.notification.controller;
+
+import lombok.RequiredArgsConstructor;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.messaging.handler.annotation.Payload;
+import org.springframework.messaging.simp.SimpMessagingTemplate;
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.DeleteMapping;
+import org.springframework.web.bind.annotation.GetMapping;
+import site.easystartup.web.notification.domian.Notification;
+
+import java.security.Principal;
+import java.util.logging.Logger;
+
+@Controller
+@RequiredArgsConstructor(onConstructor_ = @Autowired)
+public class NotificationController {
+    private final SimpMessagingTemplate messagingTemplate;
+    Logger logger = Logger.getGlobal();
+
+    @GetMapping("/notify")
+    public void notification(Principal principal, @Payload Notification notification) {
+        logger.info("Web socket sent notification to " + principal.getName());
+        messagingTemplate.convertAndSendToUser(principal.getName(), "queue/notification", notification);
+    }
+
+
+}