Structured Exception details for DMI

- Introduced DmiErrorMessage in API docs with 502 Bad Gateway
- HttpClientRequestException will be thrown which will be exposed as 502 BAD Gateway for the client from NCMP

Issue-ID: CPS-917
Change-Id: Iba8f159e8216bc1f63a9ab86208e5c802437e2e8
Signed-off-by: mpriyank <priyank.maheshwari@est.tech>

1 files changed, 22 insertions, 2 deletions

diff --git a/cps-ncmp-rest/src/main/java/org/onap/cps/ncmp/rest/exceptions/NetworkCmProxyRestExceptionHandler.java b/cps-ncmp-rest/src/main/java/org/onap/cps/ncmp/rest/exceptions/NetworkCmProxyRestExceptionHandler.java
index 0843e9741..c72373344 100755
--- a/cps-ncmp-rest/src/main/java/org/onap/cps/ncmp/rest/exceptions/NetworkCmProxyRestExceptionHandler.java
+++ b/cps-ncmp-rest/src/main/java/org/onap/cps/ncmp/rest/exceptions/NetworkCmProxyRestExceptionHandler.java
@@ -24,11 +24,14 @@ import lombok.AccessLevel;
 import lombok.NoArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 import org.onap.cps.ncmp.api.impl.exception.DmiRequestException;
+import org.onap.cps.ncmp.api.impl.exception.HttpClientRequestException;
 import org.onap.cps.ncmp.api.impl.exception.InvalidTopicException;
 import org.onap.cps.ncmp.api.impl.exception.NcmpException;
 import org.onap.cps.ncmp.api.impl.exception.ServerNcmpException;
 import org.onap.cps.ncmp.rest.controller.NetworkCmProxyController;
 import org.onap.cps.ncmp.rest.controller.NetworkCmProxyInventoryController;
+import org.onap.cps.ncmp.rest.model.DmiErrorMessage;
+import org.onap.cps.ncmp.rest.model.DmiErrorMessageDmiresponse;
 import org.onap.cps.ncmp.rest.model.ErrorMessage;
 import org.onap.cps.spi.exceptions.CpsException;
 import org.onap.cps.spi.exceptions.DataNodeNotFoundException;
@@ -66,6 +69,12 @@ public class NetworkCmProxyRestExceptionHandler {
         return buildErrorResponse(HttpStatus.INTERNAL_SERVER_ERROR, exception);
     }
 
+    @ExceptionHandler({HttpClientRequestException.class})
+    public static ResponseEntity<Object> handleClientRequestExceptions(
+            final HttpClientRequestException httpClientRequestException) {
+        return wrapDmiErrorResponse(HttpStatus.BAD_GATEWAY, httpClientRequestException);
+    }
+
     @ExceptionHandler({DmiRequestException.class, DataValidationException.class, HttpMessageNotReadableException.class,
             InvalidTopicException.class})
     public static ResponseEntity<Object> handleDmiRequestExceptions(final Exception exception) {
@@ -91,8 +100,19 @@ public class NetworkCmProxyRestExceptionHandler {
         } else {
             errorMessage.setDetails(CHECK_LOGS_FOR_DETAILS);
         }
-        errorMessage.setDetails(exception instanceof CpsException ? ((CpsException) exception).getDetails() :
-            CHECK_LOGS_FOR_DETAILS);
+        errorMessage.setDetails(
+                exception instanceof CpsException ? ((CpsException) exception).getDetails() : CHECK_LOGS_FOR_DETAILS);
         return new ResponseEntity<>(errorMessage, status);
     }
+
+    private static ResponseEntity<Object> wrapDmiErrorResponse(final HttpStatus httpStatus,
+            final HttpClientRequestException httpClientRequestException) {
+        final var dmiErrorMessage = new DmiErrorMessage();
+        final var dmiErrorResponse = new DmiErrorMessageDmiresponse();
+        dmiErrorResponse.setHttpCode(httpClientRequestException.getHttpStatus());
+        dmiErrorResponse.setBody(httpClientRequestException.getDetails());
+        dmiErrorMessage.setMessage(httpClientRequestException.getMessage());
+        dmiErrorMessage.setDmiResponse(dmiErrorResponse);
+        return new ResponseEntity<>(dmiErrorMessage, httpStatus);
+    }
 }