+ * @return collection of data node object
+ */
+ Collection<DataNode> getDataNodes(String dataspaceName, String anchorName, String xpath,
+ FetchDescendantsOption fetchDescendantsOption);
+
+ /**
+ * Retrieves multiple datanodes for multiple XPaths, given a dataspace and anchor.
+ *
+ * @param dataspaceName dataspace name
+ * @param anchorName anchor name
+ * @param xpaths collection of xpaths
+ * @param fetchDescendantsOption defines the scope of data to fetch: either single node or all the descendant nodes
+ * (recursively) as well
+ * @return collection of data node object
+ */
+ Collection<DataNode> getDataNodesForMultipleXpaths(String dataspaceName, String anchorName,
+ Collection<String> xpaths,
+ FetchDescendantsOption fetchDescendantsOption);
+
+ /**
+ * Updates data leaves for multiple data nodes.
+ *
+ * @param dataspaceName dataspace name
+ * @param anchorName anchor name
+ * @param updatedLeavesPerXPath Map of xPaths to updated leaf nodes
+ */
+ void batchUpdateDataLeaves(String dataspaceName, String anchorName,
+ Map<String, Map<String, Serializable>> updatedLeavesPerXPath);
+
+ /**
+ * Replaces multiple existing data nodes' content including descendants in a batch operation.
+ *
+ * @param dataspaceName dataspace name
+ * @param anchorName anchor name
+ * @param dataNodes data nodes
+ */
+ void updateDataNodesAndDescendants(String dataspaceName, String anchorName, final Collection<DataNode> dataNodes);
+
+ /**
+ * Replaces list content by removing all existing elements and inserting the given new elements
+ * under given parent, anchor and dataspace.
+ *
+ * @param dataspaceName dataspace name
+ * @param anchorName anchor name
+ * @param parentNodeXpath parent node xpath
+ * @param newListElements collection of data nodes representing the new list content
+ */
+ void replaceListContent(String dataspaceName, String anchorName,
+ String parentNodeXpath, Collection<DataNode> newListElements);
+
+ /**
+ * Deletes any dataNode, yang container or yang list or yang list element.
+ *
+ * @param dataspaceName dataspace name
+ * @param anchorName anchor name
+ * @param targetXpath xpath to list or list element (include [@key=value] to delete a single list element)
+ */
+ void deleteDataNode(String dataspaceName, String anchorName, String targetXpath);
+
+ /**
+ * Deletes multiple dataNode, yang container or yang list or yang list element.
+ *
+ * @param dataspaceName dataspace name
+ * @param anchorName anchor name
+ * @param targetXpaths xpaths of nodes to delete
+ */
+ void deleteDataNodes(String dataspaceName, String anchorName, Collection<String> targetXpaths);
+
+ /**
+ * Deletes all dataNodes in a given anchor.
+ *
+ * @param dataspaceName dataspace name
+ * @param anchorName anchor name
+ */
+ void deleteDataNodes(String dataspaceName, String anchorName);
+
+ /**
+ * Deletes all dataNodes in multiple anchors.
+ *
+ * @param dataspaceName dataspace name
+ * @param anchorNames anchor names
+ */
+ void deleteDataNodes(String dataspaceName, Collection<String> anchorNames);
+
+ /**
+ * Deletes a single existing list element or the whole list.
+ *
+ * @param dataspaceName dataspace name
+ * @param anchorName anchor name
+ * @param targetXpath xpath to list or list element (include [@key=value] to delete a single list element)
+ */
+ void deleteListDataNode(String dataspaceName, String anchorName, String targetXpath);
+
+ /**
+ * Get a datanode by cps path.
+ *
+ * @param dataspaceName dataspace name
+ * @param anchorName anchor name
+ * @param cpsPath cps path
+ * @param fetchDescendantsOption defines whether the descendants of the node(s) found by the query should be
+ * included in the output
+ * @return the data nodes found i.e. 0 or more data nodes
+ */
+ List<DataNode> queryDataNodes(String dataspaceName, String anchorName,
+ String cpsPath, FetchDescendantsOption fetchDescendantsOption);
+
+ /**
+ * Get a datanode by dataspace name and cps path across all anchors.
+ *
+ * @param dataspaceName dataspace name
+ * @param cpsPath cps path
+ * @param fetchDescendantsOption defines whether the descendants of the node(s) found by the query should be
+ * included in the output
+ * @param paginationOption pagination option
+ * @return the data nodes found i.e. 0 or more data nodes
+ */
+ List<DataNode> queryDataNodesAcrossAnchors(String dataspaceName,
+ String cpsPath, FetchDescendantsOption fetchDescendantsOption,
+ PaginationOption paginationOption);
+
+ /**
+ * Starts a session which allows use of locks and batch interaction with the persistence service.
+ *
+ * @return Session ID string
+ */
+ String startSession();
+
+ /**
+ * Close session.
+ *
+ * @param sessionId session ID
+ */
+ void closeSession(String sessionId);
+
+ /**
+ * Lock anchor.
+ * To release locks(s), the session holding the lock(s) must be closed.
+ *
+ * @param sessionID session ID
+ * @param dataspaceName dataspace name
+ * @param anchorName anchor name
+ * @param timeoutInMilliseconds lock attempt timeout in milliseconds
+ */
+ void lockAnchor(String sessionID, String dataspaceName, String anchorName, Long timeoutInMilliseconds);
+
+ /**
+ * Query total anchors for dataspace name and cps path.
+ * @param dataspaceName datasoace name
+ * @param cpsPath cps path
+ * @return total anchors for dataspace name and cps path