+
+ YangInstanceIdentifier normalizedII;
+ if (mountPoint != null) {
+ normalizedII = new DataNormalizer(mountPoint.getSchemaContext()).toNormalized(
+ iiWithData.getInstanceIdentifier());
+ } else {
+ normalizedII = controllerContext.toNormalized(iiWithData.getInstanceIdentifier());
+ }
+
+ /*
+ * There is a small window where another write transaction could be updating the same data
+ * simultaneously and we get an OptimisticLockFailedException. This error is likely
+ * transient and The WriteTransaction#submit API docs state that a retry will likely
+ * succeed. So we'll try again if that scenario occurs. If it fails a third time then it
+ * probably will never succeed so we'll fail in that case.
+ *
+ * By retrying we're attempting to hide the internal implementation of the data store and
+ * how it handles concurrent updates from the restconf client. The client has instructed us
+ * to put the data and we should make every effort to do so without pushing optimistic lock
+ * failures back to the client and forcing them to handle it via retry (and having to
+ * document the behavior).
+ */
+ int tries = 2;
+ while(true) {
+ try {
+ if (mountPoint != null) {
+ broker.commitConfigurationDataPut(mountPoint, normalizedII,
+ datastoreNormalizedNode).checkedGet();
+ } else {
+ broker.commitConfigurationDataPut(normalizedII,
+ datastoreNormalizedNode).checkedGet();
+ }
+
+ break;
+ } catch (TransactionCommitFailedException e) {
+ if(e instanceof OptimisticLockFailedException) {
+ if(--tries <= 0) {
+ LOG.debug("Got OptimisticLockFailedException on last try - failing");
+ throw new RestconfDocumentedException(e.getMessage(), e, e.getErrorList());
+ }
+
+ LOG.debug("Got OptimisticLockFailedException - trying again");
+ } else {
+ throw new RestconfDocumentedException(e.getMessage(), e, e.getErrorList());
+ }
+ }
+ }
+
+ return Response.status(Status.OK).build();
+ }
+
+ private void validateTopLevelNodeName(final Node<?> node,
+ final YangInstanceIdentifier identifier) {
+ final String payloadName = getName(node);
+ final Iterator<PathArgument> pathArguments = identifier.getReversePathArguments().iterator();
+
+ //no arguments
+ if (!pathArguments.hasNext()) {
+ //no "data" payload
+ if (!node.getNodeType().equals(NETCONF_BASE_QNAME)) {
+ throw new RestconfDocumentedException("Instance identifier has to contain at least one path argument",
+ ErrorType.PROTOCOL, ErrorTag.MALFORMED_MESSAGE);
+ }
+ //any arguments
+ } else {
+ final String identifierName = pathArguments.next().getNodeType().getLocalName();
+ if (!payloadName.equals(identifierName)) {
+ throw new RestconfDocumentedException("Payload name (" + payloadName
+ + ") is different from identifier name (" + identifierName + ")", ErrorType.PROTOCOL,
+ ErrorTag.MALFORMED_MESSAGE);