Cisco Cisco Evolved Programmable Network Manager 2.0 Developer's Guide
Cisco Evolved Programmable Network Manager 2.0.1 RESTCONF API Guide
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8.7 High-Availability Notifications
HA notifications are sent for:
Failover: when the secondary becomes active
Failback: when the primary becomes active again.
8.7.1 Sample HA Notifications
8.7.1.1 Failover
<?
xml
version
=
"1.0"
encoding
=
"UTF-8"
standalone
=
"yes"
?>
<
ns1:push-change-update
xmlns:ns1
=
"urn:cisco:params:xml:ns:yang:yang-push:v1"
>
<
ns1:topic
>
ha
</
ns1:topic
>
<
ns1:time-of-update
>
Thu Jun 23 05:31:50 UTC 2016
</
ns1:time-of-update
>
<
ns1:operation
>
ns14:ha
</
ns1:operation
>
<
ns1:ha-notification
>
<
ns1:operation-type
>
failover
</
ns1:operation-type
>
<
ns1:host
>
epnm-secondary
</
ns1:host
>
<
ns1:message
>
The Cisco EPN-M server at epnm-secondary is now ONLINE
</
ns1:message
>
</
ns1:ha-notification
>
</
ns1:push-change-update
>
8.7.1.2 Failback
<?
xml
version
=
"1.0"
encoding
=
"UTF-8"
standalone
=
"yes"
?>
<
ns1:push-change-update
xmlns:ns1
=
"urn:cisco:params:xml:ns:yang:yang-push:v1"
>
<
ns1:topic
>
ha
</
ns1:topic
>
<
ns1:time-of-update
>
Thu Jun 24 05:31:50 UTC 2016
</
ns1:time-of-update
>
<
ns1:operation
>
ns14:ha
</
ns1:operation
>
<
ns1:ha-notification
>
<
ns1:operation-type
>
failback
</
ns1:operation-type
>
<
ns1:host
>
epnm-primary
</
ns1:host
>
<
ns1:message
>
The Cisco EPN-M server at epnm-primary is now ONLINE
</
ns1:message
>
</
ns1:ha-notification
>
</
ns1:push-change-update
>
8.8 Notifications Client
The notifications client that is supported by EPN-M restconf should ideally be supporting
web-sockets. The recommendation is to use a client that works with "Atmosphere
framework".
8.8.1 Sample client code
import
java.util.Scanner;
import
org.atmosphere.wasync.ClientFactory;
import
org.atmosphere.wasync.Event;
import
org.atmosphere.wasync.Function;
import
org.atmosphere.wasync.Request;
import
org.atmosphere.wasync.RequestBuilder;
import
org.atmosphere.wasync.Socket;
import
org.atmosphere.wasync.impl.AtmosphereClient;