Index: lams_tool_nb/src/java/org/lamsfoundation/lams/tool/noticeboard/service/INoticeboardService.java
===================================================================
diff -u -r51baa92eb2330b3d5bed3d2a2c4cd622e665b83d -r6cce13e2c656d9cab6d0fc4a133245be0e2299c0
--- lams_tool_nb/src/java/org/lamsfoundation/lams/tool/noticeboard/service/INoticeboardService.java	(.../INoticeboardService.java)	(revision 51baa92eb2330b3d5bed3d2a2c4cd622e665b83d)
+++ lams_tool_nb/src/java/org/lamsfoundation/lams/tool/noticeboard/service/INoticeboardService.java	(.../INoticeboardService.java)	(revision 6cce13e2c656d9cab6d0fc4a133245be0e2299c0)
@@ -23,6 +23,7 @@
 
 import org.lamsfoundation.lams.tool.noticeboard.NoticeboardContent;
 import org.lamsfoundation.lams.tool.noticeboard.NoticeboardSession;
+;
 
 /**
  * Defines the contract that the tool service provider must follow
@@ -31,51 +32,97 @@
  */
 public interface INoticeboardService {
 	
-	/**
-	 * Return the NoticeboardContent object that has id nbContentId.
-	 *
-	 * @param nbContentid The id of the requested NoticeboardContent object
-	 * @return NoticeboardContent object or null if not found
-	 */
-
+    //===================================================================
+    // NoticeboardContent access methods
+    //===================================================================	
+    
+    /**
+     * <p>Retrieve an instance of NoticeboardContent with the given
+     * identifier <code>uid</code> </p>
+     * @param uid The given unique identifier of the NoticeboardContent instance
+     * @return an instance of NoticeboardContent
+     */
+    public NoticeboardContent retrieveNoticeboardByUID(Long uid);
+    
+    /**
+     * <p> Returns the persistent instance of NoticeboardContent
+     * with the given tool session id <code>nbSessionId</code>, returns null if not found.
+     * 
+     * @param nbSessionId The tool session id
+     * @return a persistent instance of NoticeboardContent or null if not found.
+     */	
+	public NoticeboardContent retrieveNoticeboardBySessionID(Long nbSessionId);
+    
+    /**
+	 * <p>Retrieve an instance of NoticeboardContent with the given
+     * tool content id <code>nbContentId</code> </p>
+     * @param nbContentId The tool content id
+     * @return an instance of NoticeboardContent
+     */
 	public NoticeboardContent retrieveNoticeboard(Long nbContentId);
 	
-	/**
-	 * Updates the values of the NoticeboardContent object.
-	 * 
-	 * @param nbContent The NoticeboardContent object to update
-	 *
-	 */	
+	
+	 /**
+     * <p>Update the given persistent instance of NoticeboardContent.</p>
+     * 
+     * @param nbContent The instance of NoticeboardContent to persist.
+     */
 	public void updateNoticeboard(NoticeboardContent nbContent);
 	
 	
 	/**
-	 * Save the content of the NoticeboardContent object
+	 * <p>Persist the given persistent instance of NoticeboardContent.</p>
 	 * 
-	 * @param nbContent the NoticeboardContent object to persist
-	 */	
+	 * @param nbContent The instance of NoticeboardContent to persist.
+	 */
 	public void saveNoticeboard(NoticeboardContent nbContent);
 	
 	
+	 /**
+     * <p>Deletes all instances of NoticeboardSession that are associated
+     * with the given instance of NoticeboardContent</p>
+     * 
+     * @param nbContent The instance of NoticeboardContent in which corresponding instances of NoticeboardSession should be deleted.
+     */
+	public void removeNoticeboardSessions(NoticeboardContent nbContent);
+	
 	/**
-	 * Removes the NoticeboardSessions which is associated with the particular 
-	 * NoticeboardContent object.
+     * <p>Delete the given instance of NoticeboardContent with the
+     * given tool content id <code>nbContentId</code>
+     * 
+     * @param nbContentId The tool content Id. 
+     */
+	public void removeNoticeboard(Long nbContentId);
+	
+	/**
+     * <p>Delete the given instance of NoticeboardContent</p>
+     * 
+     * @param nbContent The instance of NoticeboardContent to delete. 
+     */
+    public void removeNoticeboard(NoticeboardContent nbContent);
+	
+	
+    //===================================================================
+    // NoticeboardSession access methods
+    //===================================================================
+    /**
+	 * <p> Return the persistent instance of a NoticeboardSession
+	 * with the given tool session id <code>nbSessionId</code>,
+	 * returns null if not found.</p>
 	 * 
-	 * @param nbContent The noticeboard content in which its corresponding sessions
-	 * must be removed
-	 *
+	 * @param nbSessionId The tool session id
+	 * @return the persistent instance of a NoticeboardSession or null if not found.
 	 */
+	public NoticeboardSession retrieveNoticeboardSession(Long nbSessionId);
 	
-	public void removeNoticeboardSessions(NoticeboardContent nbContent);
-	
 	/**
-	 * Remove the noticeboard object with content id of
-	 * that specified in the argument.
+	 * <p>Return the persistent instance of a NoticeboardSession  
+	 * with the given identifier <code>uid</code>, returns null if not found. </p>
 	 * 
-	 * @param nbContentid The id of the requested noticeboard object
-	 *
-	 */	
-	public void removeNoticeboard(Long nbContentId);
+	 * @param uid an identifier for the NoticeboardSession object.
+	 * @return the persistent instance of a NoticeboardSession or null if not found
+	 */
+	public NoticeboardSession retrieveNoticeboardSessionByUID(Long uid);
 	
 	/**
 	 * Persists the new NoticeboardSession object into the database.
@@ -85,4 +132,33 @@
 	public void saveNoticeboardSession(NoticeboardSession nbSession);
 	
 	
+	/**
+	 * Updates the values of the noticeboard session.
+	 * @param nbSession
+	 */
+	public void updateNoticeboardSession(NoticeboardSession nbSession);
+	
+	/**
+	 * Remove the noticeboard session object with session id of
+	 * that specified in the argument.
+	 * 
+	 * @param nbSessionId The id of the requested noticeboard object
+	 *
+	 */	
+	public void removeSession(Long nbSessionId);
+	
+	 /**
+     * <p>Delete the given instance of NoticeboardSession</p>
+     * 
+     * @param nbSession The instance of NoticeboardSession to delete. 
+     */
+    public void removeSession(NoticeboardSession nbSession);
+    
+    /**
+     * <p>Delete the given instance of NoticeboardSession with the
+     * given identifier <code>uid</code>
+     * 
+     * @param uid an identifier for the NoticeboardSession instance. 
+     */
+    public void removeSessionByUID(Long uid);
 }