Add optional observed timestamp in the cps data api

- Added optional query parameter in cps data endpoints
- Updated service layer and notification to use observedTimestamp

Note:
- NCMP REST endpoints are not updated as a part of this patch
- NCMP does not sent observed timestamp when using cps data services

Issue-ID: CPS-477
Signed-off-by: puthuparambil.aditya <aditya.puthuparambil@bell.ca>
Change-Id: I1f92da3da7b3a13c45405fdf44e5fef861991d9a
Signed-off-by: Renu Kumari <renu.kumari@bell.ca>

2 files changed, 46 insertions, 18 deletions

diff --git a/cps-rest/src/main/java/org/onap/cps/rest/controller/DataRestController.java b/cps-rest/src/main/java/org/onap/cps/rest/controller/DataRestController.java
index 5c79472a4c..0e2050e5cc 100755
--- a/cps-rest/src/main/java/org/onap/cps/rest/controller/DataRestController.java
+++ b/cps-rest/src/main/java/org/onap/cps/rest/controller/DataRestController.java
@@ -1,6 +1,6 @@
 /*
  *  ============LICENSE_START=======================================================
- *  Copyright (C) 2020 Bell Canada.
+ *  Copyright (C) 2020-2021 Bell Canada.
  *  Modifications Copyright (C) 2021 Pantheon.tech
  *  Modifications Copyright (C) 2021 Nordix Foundation
  *  ================================================================================
@@ -9,6 +9,7 @@
  *  You may obtain a copy of the License at
  *
  *        http://www.apache.org/licenses/LICENSE-2.0
+ *
  *  Unless required by applicable law or agreed to in writing, software
  *  distributed under the License is distributed on an "AS IS" BASIS,
  *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -21,8 +22,10 @@
 
 package org.onap.cps.rest.controller;
 
-import javax.validation.Valid;
-import javax.validation.constraints.NotNull;
+import java.time.OffsetDateTime;
+import java.time.format.DateTimeFormatter;
+import javax.validation.ValidationException;
+import org.apache.commons.lang3.StringUtils;
 import org.onap.cps.api.CpsDataService;
 import org.onap.cps.rest.api.CpsDataApi;
 import org.onap.cps.spi.FetchDescendantsOption;
@@ -38,25 +41,29 @@ import org.springframework.web.bind.annotation.RestController;
 public class DataRestController implements CpsDataApi {
 
     private static final String ROOT_XPATH = "/";
+    private static final String ISO_TIMESTAMP_FORMAT = "yyyy-MM-dd'T'HH:mm:ss.SSSZ";
+    private static final DateTimeFormatter ISO_TIMESTAMP_FORMATTER = DateTimeFormatter.ofPattern(ISO_TIMESTAMP_FORMAT);
 
     @Autowired
     private CpsDataService cpsDataService;
 
     @Override
     public ResponseEntity<String> createNode(final String dataspaceName, final String anchorName,
-        final String jsonData, final String parentNodeXpath) {
+        final String jsonData, final String parentNodeXpath, final String observedTimestamp) {
         if (isRootXpath(parentNodeXpath)) {
-            cpsDataService.saveData(dataspaceName, anchorName, jsonData);
+            cpsDataService.saveData(dataspaceName, anchorName, jsonData, toOffsetDateTime(observedTimestamp));
         } else {
-            cpsDataService.saveData(dataspaceName, anchorName, parentNodeXpath, jsonData);
+            cpsDataService.saveData(dataspaceName, anchorName, parentNodeXpath, jsonData,
+                toOffsetDateTime(observedTimestamp));
         }
         return new ResponseEntity<>(HttpStatus.CREATED);
     }
 
     @Override
     public ResponseEntity<String> addListNodeElements(final String parentNodeXpath,
-        final String dataspaceName, final String anchorName, final String jsonData) {
-        cpsDataService.saveListNodeData(dataspaceName, anchorName, parentNodeXpath, jsonData);
+        final String dataspaceName, final String anchorName, final String jsonData, final String observedTimestamp) {
+        cpsDataService.saveListNodeData(dataspaceName, anchorName, parentNodeXpath, jsonData,
+            toOffsetDateTime(observedTimestamp));
         return new ResponseEntity<>(HttpStatus.CREATED);
     }
 
@@ -77,33 +84,48 @@ public class DataRestController implements CpsDataApi {
 
     @Override
     public ResponseEntity<Object> updateNodeLeaves(final String dataspaceName,
-        final String anchorName, final String jsonData, final String parentNodeXpath) {
-        cpsDataService.updateNodeLeaves(dataspaceName, anchorName, parentNodeXpath, jsonData);
+        final String anchorName, final String jsonData, final String parentNodeXpath, final String observedTimestamp) {
+        cpsDataService.updateNodeLeaves(dataspaceName, anchorName, parentNodeXpath, jsonData,
+            toOffsetDateTime(observedTimestamp));
         return new ResponseEntity<>(HttpStatus.OK);
     }
 
     @Override
-    public ResponseEntity<Object> replaceNode(final String dataspaceName,
-        final String anchorName, @Valid final String jsonData, @Valid final String parentNodeXpath) {
-        cpsDataService.replaceNodeTree(dataspaceName, anchorName, parentNodeXpath, jsonData);
+    public ResponseEntity<Object> replaceNode(final String dataspaceName, final String anchorName,
+        final String jsonData, final String parentNodeXpath, final String observedTimestamp) {
+        cpsDataService
+            .replaceNodeTree(dataspaceName, anchorName, parentNodeXpath, jsonData, toOffsetDateTime(observedTimestamp));
         return new ResponseEntity<>(HttpStatus.OK);
     }
 
     @Override
-    public ResponseEntity<String> replaceListNodeElements(@NotNull @Valid final String parentNodeXpath,
-        final String dataspaceName, final String anchorName, @Valid final String jsonData) {
-        cpsDataService.replaceListNodeData(dataspaceName, anchorName, parentNodeXpath, jsonData);
+    public ResponseEntity<String> replaceListNodeElements(final String parentNodeXpath,
+        final String dataspaceName, final String anchorName, final String jsonData,
+        final String observedTimestamp) {
+        cpsDataService.replaceListNodeData(dataspaceName, anchorName, parentNodeXpath, jsonData,
+            toOffsetDateTime(observedTimestamp));
         return new ResponseEntity<>(HttpStatus.OK);
     }
 
     @Override
     public ResponseEntity<Void> deleteListNodeElements(final String dataspaceName, final String anchorName,
-                                                         final String listNodeXpath) {
-        cpsDataService.deleteListNodeData(dataspaceName, anchorName, listNodeXpath);
+        final String listNodeXpath, final String observedTimestamp) {
+        cpsDataService
+            .deleteListNodeData(dataspaceName, anchorName, listNodeXpath, toOffsetDateTime(observedTimestamp));
         return new ResponseEntity<>(HttpStatus.NO_CONTENT);
     }
 
     private static boolean isRootXpath(final String xpath) {
         return ROOT_XPATH.equals(xpath);
     }
+
+    private OffsetDateTime toOffsetDateTime(final String datetTimestamp) {
+        try {
+            return StringUtils.isEmpty(datetTimestamp)
+                ? null : OffsetDateTime.parse(datetTimestamp, ISO_TIMESTAMP_FORMATTER);
+        } catch (final Exception exception) {
+            throw new ValidationException(
+                String.format("observed-timestamp must be in '%s' format", ISO_TIMESTAMP_FORMAT));
+        }
+    }
 }
diff --git a/cps-rest/src/main/java/org/onap/cps/rest/exceptions/CpsRestExceptionHandler.java b/cps-rest/src/main/java/org/onap/cps/rest/exceptions/CpsRestExceptionHandler.java
index 143ad8b886..d790e0802d 100755
--- a/cps-rest/src/main/java/org/onap/cps/rest/exceptions/CpsRestExceptionHandler.java
+++ b/cps-rest/src/main/java/org/onap/cps/rest/exceptions/CpsRestExceptionHandler.java
@@ -22,6 +22,7 @@
 package org.onap.cps.rest.exceptions;
 
 import javax.servlet.http.HttpServletRequest;
+import javax.validation.ValidationException;
 import lombok.extern.slf4j.Slf4j;
 import org.onap.cps.rest.controller.AdminRestController;
 import org.onap.cps.rest.controller.DataRestController;
@@ -67,6 +68,11 @@ public class CpsRestExceptionHandler {
         return buildErrorResponse(HttpStatus.BAD_REQUEST, exception);
     }
 
+    @ExceptionHandler({ValidationException.class})
+    public static ResponseEntity<Object> handleBadRequestExceptions(final ValidationException validationException) {
+        return buildErrorResponse(HttpStatus.BAD_REQUEST, validationException);
+    }
+
     @ExceptionHandler({NotFoundInDataspaceException.class, DataNodeNotFoundException.class})
     public static ResponseEntity<Object> handleNotFoundExceptions(final CpsException exception,
         final HttpServletRequest request) {