An example of a server-side cluster state listener is in JDBC river plugin

https://github.com/jprante/elasticsearch-river-jdbc/blob/master/src/main/java/org/xbib/elasticsearch/action/river/jdbc/state/RiverStateService.java

I use it to augment the cluster state with river state info.

Jörg


On Fri, Aug 22, 2014 at 10:08 AM, 'Sandeep Ramesh Khanzode' via
elasticsearch <[email protected]> wrote:

> Hi Jorg,
>
> Can you please give a server-side or client-side example of using
> CLusterStateListener?
> Do I have to use a plugin. if so, which module do I register/override?
> If not, do I have to use a Node Client (not a TransportClient), and
> retrieve the ClusterService somehow and then register?
>
> Thanks
> Sandeep
>
>
> On Thursday, 10 July 2014 22:25:51 UTC+5:30, Jörg Prante wrote:
>
>> On the client side, you can't use cluster state listener, it is for nodes
>> that have access to a local copy of the master cluster state. Clients must
>> execute an action to ask for cluster state, and with the current transport
>> request/response cycle, they must poll for new events ...
>>
>> Jörg
>>
>>
>> On Thu, Jul 10, 2014 at 6:38 PM, Ivan Brusic <[email protected]> wrote:
>>
>>> Jörg, have you actually implemented your own ClusterStateListener? I
>>> never had much success. Tried using that interface or even
>>> PublishClusterStateAction.NewClusterStateListener, but either I could
>>> not configure successfully the module (the former) or received no events
>>> (the latter). Implemented on the client side, not as a plugin.
>>>
>>> Cheers,
>>>
>>> Ivan
>>>
>>>
>>>
>>> On Wed, Jul 9, 2014 at 4:21 PM, [email protected] <[email protected]>
>>> wrote:
>>>
>>>>
>>>> 4. Yes. Use org.elasticsearch.cluster.ClusterStateListener
>>>>
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