Liferay has similar functionality in Blogs (display-date), Web-content (schedule-content), Calendar (event reminders) etc.
Email notificationI am giving an example as to how you can send the email notification by taking example from Liferay's Calendar-portlet.
You can check calendar portlet's liferay-portlet.xml and search for an entry like:
<scheduler-entry>
<scheduler-event-listener-class>com.liferay.calendar.messaging.CheckBookingsMessageListener</scheduler-event-listener-class>
<trigger>
<simple>
<property-key>calendar.notification.check.interval</property-key>
<time-unit>minute</time-unit> <!-- this can be second, minute, day etc -->
</simple>
</trigger>
</scheduler-entry>
What this does is it will the run the code in CheckBookingsMessageListener after so many minutes as specified for property "calendar.notification.check.interval" in portlet.properties. So if the value specified in portlet.properties is:
calendar.notification.check.interval=2
Then the method doReceive() in CheckBookingsMessageListener (as shown below) will run every 2 minutes:
public class CheckBookingsMessageListener extends BaseMessageListener {
protected void doReceive(Message message) throws Exception {
CalendarBookingLocalServiceUtil.checkCalendarBookings();
}
}
You would need to implement a custom listener like this as shown above.
Now you can write your code logic inside this method to fetch all those videos for the different users whose displayDate (set by the User from the portlet) is going to come in next 6 hrs and after fetching you can send the notification.
Displaying the content on scheduled time when user comes on the pageThere are two ways:
- Similar to Liferay's Blogs portlet, just fetch those media items in the portlet whose displayDate is reached.
- Using the above notification mechanism, set a certain flag value for the media items in the DB whose displayDate is reached and then show only the items for which the flag is set to that value
Hope this makes sense and I hope I have understood what is required.
