added sending of event on eventBus when session expires

git-svn-id: http://svn.research-infrastructures.eu/public/d4science/gcube/trunk/portlets/widgets/session-checker@93509 82a268e6-3cf1-43bd-a215-b396298e98cf

src/main/java/org/gcube/portlets/widgets/sessionchecker/client/CheckSession.java

@@ -3,10 +3,12 @@ package org.gcube.portlets.widgets.sessionchecker.client;
 import org.gcube.portlets.user.gcubewidgets.client.popup.GCubeDialog;
 import org.gcube.portlets.widgets.sessionchecker.client.bundle.CheckSessionBundle;
 import org.gcube.portlets.widgets.sessionchecker.client.elements.Div;
+import org.gcube.portlets.widgets.sessionchecker.client.event.SessionTimeoutEvent;
 import org.gcube.portlets.widgets.sessionchecker.shared.SessionInfoBean;
 
 import com.google.gwt.core.client.GWT;
 import com.google.gwt.dom.client.Style.Display;
+import com.google.gwt.event.shared.HandlerManager;
 import com.google.gwt.user.client.Timer;
 import com.google.gwt.user.client.rpc.AsyncCallback;
 import com.google.gwt.user.client.ui.HTML;
@@ -23,6 +25,10 @@ public class CheckSession {
 	static {
 		CheckSessionBundle.INSTANCE.css().ensureInjected();
 	}
+	/**
+	 * the eventbus where to launch the events 
+	 */
+	private HandlerManager eventBus = null;
 	/**
 	 * Create a remote service proxy to talk to the server-side Greeting service.
 	 */
@@ -36,13 +42,34 @@ public class CheckSession {
 	private Div maskDiv = new Div();
 	
 	private static CheckSession singleton;
-
+	/**
+	 * use this method if you want to get an event when session expires
+	 * @param eventBus your GWT webapp instance of {@link HandlerManager}
+	 */
+	public static CheckSession getInstance(HandlerManager eventBus) {
+		if (singleton == null)
+			singleton = new CheckSession(eventBus);
+		return singleton;
+	}
+	/**
+	 * method with no events launching when session expires
+	 */
 	public static CheckSession getInstance() {
 		if (singleton == null)
 			singleton = new CheckSession();
 		return singleton;
 	}
-
+	/**
+	 * use this constructor if you want to get an event when session expires
+	 * @param eventBus GWT webapp instance of {@link HandlerManager}
+	 */
+	private CheckSession(HandlerManager eventBus) {	
+		this();
+		this.eventBus = eventBus;
+	}
+	/**
+	 * constructor with no events launching when session expires
+	 */
 	private CheckSession() {	
 		
 		addMaskDiv2DOM();
@@ -66,6 +93,9 @@ public class CheckSession {
 								mask(true);
 								stopPolling();
 								showLogoutDialog();
+								if (eventBus != null) {
+									eventBus.fireEvent(new SessionTimeoutEvent(result));
+								}
 							}
 						}	
 						else {

src/main/java/org/gcube/portlets/widgets/sessionchecker/client/event/SessionTimeoutEvent.java

@@ -0,0 +1,31 @@
+package org.gcube.portlets.widgets.sessionchecker.client.event;
+
+import org.gcube.portlets.widgets.sessionchecker.shared.SessionInfoBean;
+
+import com.google.gwt.event.shared.GwtEvent;
+
+
+
+public class SessionTimeoutEvent  extends GwtEvent<SessionTimoutEventHandler> {
+	public static Type<SessionTimoutEventHandler> TYPE = new Type<SessionTimoutEventHandler>();
+		
+	private SessionInfoBean sessionInfo;
+	
+	public SessionTimeoutEvent(SessionInfoBean sessionInfo) {
+		this.sessionInfo = sessionInfo;
+	}
+
+	public SessionInfoBean getSessionInfo() {
+		return sessionInfo;
+	}
+
+	@Override
+	public Type<SessionTimoutEventHandler> getAssociatedType() {
+		return TYPE;
+	}
+
+	@Override
+	protected void dispatch(SessionTimoutEventHandler handler) {
+		handler.onSessionExpiration(this);
+	}
+}

src/main/java/org/gcube/portlets/widgets/sessionchecker/client/event/SessionTimoutEventHandler.java

@@ -0,0 +1,7 @@
+package org.gcube.portlets.widgets.sessionchecker.client.event;
+
+import com.google.gwt.event.shared.EventHandler;
+
+public interface SessionTimoutEventHandler extends EventHandler {
+  void onSessionExpiration(SessionTimeoutEvent event);
+}