Example: Using default scheduler calendars

Use The SIMPLE and CRON calendars from any J2EE application.

Use default scheduler calendars involves looking up the default UserCalendarHome Enterprise JavaBeans (EJB) home object, creating the UserCalendar bean and calling the applyDelta() method. For details on the applyDelta method as well as the syntax for the SIMPLE and CRON calendars, see the UserCalendar interface topic.

Example:

import java.util.Date;
import javax.naming.InitialContext;
import javax.rmi.PortableRemoteObject;
import com.ibm.websphere.scheduler.UserCalendar;
import com.ibm.websphere.scheduler.UserCalendarHome;

// Create an initial context
InitialContext ctx = new InitialContext();

// Lookup and narrow the default UserCalendar home.
UserCalendarHome defaultCalHome=(UserCalendarHome)
	PortableRemoteObject.narrow(ctx.lookup(
      UserCalendarHome.DEFAULT_CALENDAR_JNDI_NAME), 
	   UserCalendarHome.class);

// Create the default UserCalendar instance.
UserCalendar defaultCal = defaultCalHome.create();

// Calculate a date using CRON based on the current
// date and time.  Return the next date that is 
// Saturday at 2AM
Date newDate = 
    defaultCal.applyDelta(new Date(), 
        "CRON", "0 0 2 ? * SAT");

Related:

Scheduler calendars

Scheduler daemon

Install default scheduler calendars

Manage schedulers

Developing and scheduling tasks

UserCalendar interface