chore: fixes NPE in case of unfavorable SD entries and improves logging to find a hidden exceptions

Author: jekutzsche

iris-client-bff/src/main/java/iris/client_bff/status/eps/EPSStatusClient.java

@@ -14,6 +14,7 @@
 import java.net.ConnectException;
 import java.net.SocketTimeoutException;
 import java.util.List;
+import java.util.Objects;
 import java.util.Set;
 
 import javax.validation.Valid;
@@ -43,6 +44,7 @@ public Apps getAvailableApps() {
 			return epsRpcClient.invoke(methodName, null, Directory.class).entries().stream()
 					.filter(directoryEntry -> directoryEntry.groups().contains("checkin-apps"))
 					.map(DirectoryEntry::name)
+					.filter(Objects::nonNull)
 					.map(App::new)
 					.collect(collectingAndThen(toList(), Apps::new));
 

iris-client-bff/src/main/java/iris/client_bff/status/web/AppStatusController.java

@@ -8,6 +8,7 @@
 import iris.client_bff.status.web.AppStatusController.AppStatusInfo.Info;
 import lombok.AllArgsConstructor;
 import lombok.Value;
+import lombok.extern.slf4j.Slf4j;
 
 import java.util.List;
 
@@ -27,6 +28,7 @@
 @RequestMapping("/status/checkin-apps")
 @Validated
 @AllArgsConstructor
+@Slf4j
 public class AppStatusController {
 
 	private StatusService statusService;
@@ -37,6 +39,9 @@ public List<App> getApps() {
 		try {
 			return statusService.getApps().toList();
 		} catch (Exception e) {
+
+			log.error("Can't get apps from StatusService: ", e);
+
 			throw new ResponseStatusException(HttpStatus.BAD_REQUEST, e.getMessage());
 		}
 	}