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.TH snmpa_notification_filter 3 "snmp 4.11" "Ericsson AB" "ERLANG MODULE DEFINITION"
.SH MODULE
snmpa_notification_filter \- Behaviour module for the SNMP agent notification filters\&.
.SH DESCRIPTION
.LP
This module defines the behaviour of the agent notification filters\&. A \fIsnmpa_notification_filter\fR compliant module must export the following functions:
.RS 2
.TP 2
*
handle_notification/2
.RE
.LP
The semantics of them and their exact signatures are explained below\&.
.LP
The purpose of notification filters is to allow for modification and/or suppression of a notification\&.
.LP
A misbehaving filter will be removed\&.
.SH EXPORTS
.LP
.B
handle_notification(Notif, Data) -> Reply
.br
.RS
.TP
Types
Reply = send | {send, NewNotif} | dont_send
.br
Notif = NewNotif = notification() | trap()
.br
Data = term()
.br
.RE
.RS
.LP
Handle a notification to be sent\&. The filter can either accept the notification as is, return \fIsend\fR, modify the notification, return \fI{send, NewNotif}\fR or suppress the notification, return \fIdont_send\fR\&.
.LP
\fIData\fR is supplied at filter registration time, see register_notification_filter\&.
.RE
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