Specifies the objects that are being used for messages: Job, JobChains, Timers,
MasterMessage, TaskWarning, TaskIfLongerThan, TaskIfShorterThan.
Notifications can be restricted to certain jobs or job chains for which messages
are forwarded to a specific System Monitor or System Monitor service.
TimerRef includes checks that verify if a certain threshold has been exceeded
by a minimum or maximum value. Such checks can include to verify the
duration of a job chain or specific values that are reported by jobs.
MasterMessage includes problems detected by a JobScheduler Master, e.g. database connection lost.
TaskWarning includes job execution warning messages.
TaskIfLongerThan includes the feature to send notification in case that the execution of job requires
a longer duration than expected.
TaskIfShorterThan includes the feature to send notification in case that the execution of job requires
a shorter duration than expected.