How to use Event based retention

Hello,

            1) I have set the below parameters before commiting the image in centera to set Event based retention with the duration as 1000 milliseconds

    

                xSet.createRetention(true, "event");

                xSet.setRetentionEnabledFlag("event", false, true);

                xSet.setRetentionDuration("event", false, 1000);

                xSet.setRetentionStarttime("event", false);

             After 1000 milliseconds when i try to delete the document, i get Xset is under retention. This could be because the Event has not been triggered yet. How to trigger the event ? 

            

                2) If we dont specify any retention during image commital , Does it mean the image would be stored with infinite retention ? can we specify the retention at a later stage ?