Hi,
How can we receive JMX notifications for backend enable/disable events ?
We've made some tests using the SequoiaNotificationListener provided in
the examples but
even if we disable backend by hand (using the disable command in the JMX
console) or by really disabling the MySQL service,
we never receive any notification about these events.
Are we missing something ?
The example provided by SequoiaNotificationListener is out of date.
JMX notifications related to backend state changes are sent to listeners
registered with Backend's ObjectName and not VDB's ObjectName.
Backend's ObjectName is
"sequoia:type=VirtualDataBase.Backend,VirtualDataBase={0},name={1}"
where 0 => vdb name
1 => backend name
The type of notification for backend state change is
AttributeChangeNotification[1] which contains both the previous and new backend
state value as defined in BackendState[2].
Hope it helps,
jeff
--
[1]
http://java.sun.com/j2se/1.5.0/docs/api/javax/management/AttributeChangeNotification.html
[2] http://sequoia.continuent.org/doc/2.10/api/index.html
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