Writing Monitors for the Event Monitoring Service (December 1999)

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monitoring requests.
polling interval specifies how
often the resource monitor should
check the resource value to see if it
satisfies the notification criteria.
Valid values are 1-86400 seconds
(24 hours).
Registrar The Registrar process
provides the link between resource
status consumers (clients) and
resourcestatus providers (resource
monitors).
resource May be any entity an
application developer names.
Examples include a network
interface, CPU statistics, a MIB
object, a network service, and the
status of a database.
resource class Refers to a
category of resources (for example,
/net/interfaces) and is useful
during configuration.
resource dictionary A file or
files describing the hierarchy of
resources that can be monitored
andthe processes that will perform
the resource monitoring.
resource instance Refers to an
actual instantiation of a resource.
For example,
/net/interfaces/lan0 may refer
to a particular network interface
that is installed on the monitored
system.
resource monitor The process
that is used to obtain the status of
a resource and send event
notifications if appropriate. A
monitor checks resources on the
local system and sends
notifications to the target
application.
restart notification A Restart
Notification object identifies
resources that were affected by an
outage of a resource monitor.
SNMP Trap A message that
reports a problem or significant
event using the Simple Network
Management Protocol. SNMP
traps are designed for use by
target applications such as
CA/Unicenter and OpenView
Network Node Manager and
IT/Operations.
state The current value of a
resource (for example, UP or
DOWN). For some resource
instances, a monitor may need to
maintain a history of past events
or conditions in order to know the
resource value. In this case, a
monitor is said to be maintaining