readiness check

backend/src/main/java/com/nttdata/calender/ApplicationStartupListener.java

@@ -0,0 +1,21 @@
+package com.nttdata.calender;
+
+import org.springframework.boot.context.event.ApplicationReadyEvent;
+import org.springframework.context.ApplicationListener;
+import org.springframework.stereotype.Component;
+
+@Component
+public class ApplicationStartupListener implements ApplicationListener<ApplicationReadyEvent> {
+
+    private static boolean applicationReady = false;
+
+    @Override
+    public void onApplicationEvent(ApplicationReadyEvent event) {
+        System.out.println("Application is ready to service requests.");
+        applicationReady = true;
+    }
+
+    public static boolean isApplicationReady() {
+        return applicationReady;
+    }
+}

backend/src/main/java/com/nttdata/calender/ReadyStatus.java

@@ -0,0 +1,17 @@
+package com.nttdata.calender;
+
+public class ReadyStatus {
+    private boolean ready;
+
+    public ReadyStatus(boolean ready) {
+        this.ready = ready;
+    }
+
+    public boolean isReady() {
+        return ready;
+    }
+
+    public void setReady(boolean ready) {
+        this.ready = ready;
+    }
+}

backend/src/main/java/com/nttdata/calender/api/KalenderRestController.java

@@ -8,6 +8,7 @@ import org.apache.logging.log4j.Logger;
 import org.checkerframework.common.util.report.qual.ReportCall;
 import org.json.JSONObject;
 import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.CrossOrigin;
 import org.springframework.web.bind.annotation.GetMapping;
@@ -17,7 +18,10 @@ import org.springframework.web.bind.annotation.ResponseBody;
 import org.springframework.web.bind.annotation.RestController;
 import com.bmc.arsys.api.ARException;
 import com.bmc.arsys.api.Value;
+import com.bmc.thirdparty.org.springframework.context.ApplicationListener;
 import com.fasterxml.jackson.core.JsonProcessingException;
+import com.nttdata.calender.ApplicationStartupListener;
+import com.nttdata.calender.ReadyStatus;
 import com.nttdata.calender.approval.Approval;
 import com.nttdata.calender.approval.ApprovalUpdateRequest;
 import com.nttdata.calender.changes.Change;
@@ -80,6 +84,13 @@ public class KalenderRestController {
         this.stateChange = stateChange;
     }
 
+    @CrossOrigin("*")
+    @PostMapping("/setReady")
+    @ResponseBody
+    public ReadyStatus setReady() {
+        return new ReadyStatus(ApplicationStartupListener.isApplicationReady());
+    }
+
     /**
      * Handles GET request to retrieve all the states and their actual and possible
      * states and results a JSON array.
@@ -102,7 +113,7 @@ public class KalenderRestController {
      * 
      * @return JSON Array of states with actualState, possibleStates, stateNameEN,
      *         stateNameDE
-     * @throws ARException 
+     * @throws ARException
      * @throws JsonProcessingException if an exception occurs during JSON processing
      */
     @CrossOrigin("*")
@@ -114,7 +125,8 @@ public class KalenderRestController {
                 .addFieldId("Name", 1000000017)
                 .build();
 
-        var name = this.javaAPI.queryFieldsById("\'4\'==\"" + javaAPI.getUser() + "\"", query.getFieldIds(), query.getFormName(), null, 0, 0).get(0);
+        var name = this.javaAPI.queryFieldsById("\'4\'==\"" + javaAPI.getUser() + "\"", query.getFieldIds(),
+                query.getFormName(), null, 0, 0).get(0);
         String jsonString = "{\"userId\": \"" + name.get(query.getFieldId("Name")) + "\"}";
         return jsonString;
     }