Provides the definition of the Timer MBean. A Timer MBean
maintains a list of scheduled notifications and, because it is a
NotificationBroadcaster, a list of listeners for those
notifications. Whenever the time for one of the scheduled
notifications is reached, each listener receives the
notification. Notifications can be repeated at a fixed
interval, and the number of repetitions can be bounded.
A listener for a Timer MBean can itself be an MBean, using
MBeanServer.addNotificationListener(ObjectName, ObjectName, NotificationFilter, Object). In this way, a
management application can create an MBean representing a task,
then schedule that task using a Timer MBean.