Added efficient method to retireve VRE logo URLs

git-svn-id: http://svn.research-infrastructures.eu/public/d4science/gcube/trunk/portlets/user/my-vres@131971 82a268e6-3cf1-43bd-a215-b396298e98cf

src/main/java/org/gcube/portlet/user/my_vres/server/MyVREsServiceImpl.java

@@ -2,7 +2,6 @@ package org.gcube.portlet.user.my_vres.server;
 
 import java.util.ArrayList;
 import java.util.Collections;
-import java.util.Date;
 import java.util.LinkedHashMap;
 import java.util.List;
 
@@ -32,6 +31,7 @@ import org.slf4j.LoggerFactory;
 import com.google.gwt.user.server.rpc.RemoteServiceServlet;
 import com.liferay.portal.kernel.exception.PortalException;
 import com.liferay.portal.kernel.exception.SystemException;
+import com.liferay.portal.kernel.util.StringBundler;
 import com.liferay.portal.model.Group;
 import com.liferay.portal.model.VirtualHost;
 import com.liferay.portal.security.auth.PrincipalThreadLocal;
@@ -42,6 +42,8 @@ import com.liferay.portal.service.GroupLocalServiceUtil;
 import com.liferay.portal.service.LayoutSetLocalServiceUtil;
 import com.liferay.portal.service.UserLocalServiceUtil;
 import com.liferay.portal.service.VirtualHostLocalServiceUtil;
+import com.liferay.portal.util.PortalUtil;
+import com.liferay.portal.webserver.WebServerServletTokenUtil;
 
 /**
  * The server side implementation of the RPC service.
@@ -126,7 +128,7 @@ public class MyVREsServiceImpl extends RemoteServiceServlet implements	MyVREsSer
 					_log.error("Cannot find root organziation, please check gcube-data.properties file in $CATALINA_HOME/conf folder, unless your installing the Bundle");
 					return toReturn;
 				}
-				long nowInMillis = new Date().getTime();
+			
 				//for each root sub organizations (VO)
 				for (GCubeGroup vOrg : rootGroupVO.getChildren()) {
 					for (GCubeGroup vre : vOrg.getChildren()) {
@@ -134,7 +136,7 @@ public class MyVREsServiceImpl extends RemoteServiceServlet implements	MyVREsSer
 						vreToAdd.setName(vre.getGroupName());
 						vreToAdd.setGroupName(gm.getInfrastructureScope(vre.getGroupId()));
 						long logoId = vre.getLogoId();
-						String logoURL = "/image/layout_set_logo?img_id="+ logoId+"&t="+nowInMillis;
+						String logoURL = gm.getGroupLogoURL(logoId);
 						vreToAdd.setImageURL(logoURL);
 						String vreUrl = GCubePortalConstants.PREFIX_GROUP_URL+vre.getFriendlyURL();
 						vreToAdd.setFriendlyURL(vreUrl);
@@ -168,7 +170,7 @@ public class MyVREsServiceImpl extends RemoteServiceServlet implements	MyVREsSer
 			return null;
 		}
 	}
-
+	
 
 	/**
 	 *