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diff --git a/opendaylight/samples/clustersession/src/main/java/org/opendaylight/controller/clustersession/service/ClusterSessionService.java b/opendaylight/samples/clustersession/src/main/java/org/opendaylight/controller/clustersession/service/ClusterSessionService.java
new file mode 100644
index 0000000000..9991b33f80
--- /dev/null
+++ b/opendaylight/samples/clustersession/src/main/java/org/opendaylight/controller/clustersession/service/ClusterSessionService.java
@@ -0,0 +1,84 @@
+package org.opendaylight.controller.clustersession.service;
+
+import java.util.HashMap;
+
+import org.apache.catalina.Session;
+import org.apache.catalina.util.SessionIdGenerator;
+import org.opendaylight.controller.clustersession.ClusterSession;
+
+/**
+ * A service to handle session persistence and retrieval in any data store
+ *
+ * @author harman singh
+ *
+ */
+public interface ClusterSessionService {
+
+  /**
+   * This method performs all startup operations
+   */
+  void startInternal(SessionIdGenerator sessionIdGenerator);
+
+  /**
+   * Method to perform all clean up operations
+   */
+  void stopInternal();
+
+  /**
+   * Find Session object based on provided session id from persistance
+   * @param id
+   * @return an instance of Session
+   */
+  Session findSession(final String id);
+
+  /**
+   * Get an array of session objects available in storage
+   */
+  Session[] findSessions();
+
+  /**
+   * Remove a session object from persistence
+   * @param id of session object need to be removed
+   */
+  void removeSession(final String id);
+
+  /**
+   * Expire and remove a session object from persistence
+   * @param id of session object need to be expired
+   */
+  void expireSession(final String id);
+
+  /**
+   * Create a session object based on session id, if session is not present
+   * use random session id
+   * @param sessionId
+   * @return an instance of Session
+   */
+  Session createSession(final String sessionId);
+
+  /**
+   * Add a session object in persistence
+   * @param session an instance of ClusterSession
+   */
+  void addSession(final ClusterSession session);
+
+  /**
+   * Create an empty Session object
+   * @return session object
+   */
+  Session createEmptySession();
+
+  /**
+   * Fetch attributes of Session object fetched by supplied session id
+   * @param sessionId
+   * @return
+   */
+  HashMap<String, String> getSession(String sessionId);
+
+  /**
+   * update the session object in persistence
+   * @param session
+   */
+  void updateSession(final ClusterSession session);
+
+}