public void clearUnused() {
Log log=getLog();
try{
// create cleaner engine for session/client scope
if(session==null)session=new StorageScopeEngine(factory,log,new StorageScopeCleaner[]{
new FileStorageScopeCleaner(Scope.SCOPE_SESSION, null)//new SessionEndListener())
,new DatasourceStorageScopeCleaner(Scope.SCOPE_SESSION, null)//new SessionEndListener())
//,new CacheStorageScopeCleaner(Scope.SCOPE_SESSION, new SessionEndListener())
});
if(client==null)client=new StorageScopeEngine(factory,log,new StorageScopeCleaner[]{
new FileStorageScopeCleaner(Scope.SCOPE_CLIENT, null)
,new DatasourceStorageScopeCleaner(Scope.SCOPE_CLIENT, null)
//,new CacheStorageScopeCleaner(Scope.SCOPE_CLIENT, null) //Cache storage need no control, if there is no listener
});