# Elastic search dynamic number of replicas from Java API **URL:** \ **Category:** Elasticsearch\ **Created:** [July 9, 2014, 9:57pm UTC](https://discuss.elastic.co/t/elastic-search-dynamic-number-of-replicas-from-java-api/18563 "2014-07-09T21:57:53Z")\ **Posts on this page:** 2\ **Page:** 2
**Author:** ![jprante](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/jprante/32/44941_2.png) [@jprante](https://discuss.elastic.co/u/jprante)\ **Post date:** [August 25, 2014, 9:49am UTC](https://discuss.elastic.co/t/elastic-search-dynamic-number-of-replicas-from-java-api/18563/21 "2014-08-25T09:49:02Z")
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](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 [elasticsearch@googlegroups.com](mailto:elasticsearch@googlegroups.com) 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 [iv...@brusic.com](mailto:iv...@brusic.com) 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, [joerg...@gmail.com](mailto:joerg...@gmail.com) [joerg...@gmail.com](mailto:joerg...@gmail.com) > > > wrote: > > > > > > > 1. Yes. Use org.elasticsearch.cluster.ClusterStateListener > > > > > > > > -- > > > > You received this message because you are subscribed to the Google > > > > Groups "elasticsearch" group. > > > > To unsubscribe from this group and stop receiving emails from it, send > > > > an email to [elasticsearc...@googlegroups.com](mailto:elasticsearc...@googlegroups.com). > > > > To view this discussion on the web visit [https://groups.google.com/d/](https://groups.google.com/d/) > > > > msgid/elasticsearch/CALY%3DcQBB%3DW\_qG9E7i- > > > > sEc6HZeMskxKgbqzaKgqzSQ26sjgT5%2BQ%[40mail.gmail.com](http://40mail.gmail.com) > > > > [https://groups.google.com/d/msgid/elasticsearch/CALY%3DcQBB%3DW\_qG9E7i-sEc6HZeMskxKgbqzaKgqzSQ26sjgT5%2BQ%40mail.gmail.com?utm\_medium=email&utm\_source=footer](https://groups.google.com/d/msgid/elasticsearch/CALY%3DcQBB%3DW_qG9E7i-sEc6HZeMskxKgbqzaKgqzSQ26sjgT5%2BQ%40mail.gmail.com?utm_medium=email&utm_source=footer) > > > > . > > > > > > For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). > > > > -- > > You received this message because you are subscribed to the Google Groups > > "elasticsearch" group. > > To unsubscribe from this group and stop receiving emails from it, send an > > email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). > > To view this discussion on the web visit > > [https://groups.google.com/d/msgid/elasticsearch/35f6b64e-3787-4891-a3a8-518dfd7638e3%40googlegroups.com](https://groups.google.com/d/msgid/elasticsearch/35f6b64e-3787-4891-a3a8-518dfd7638e3%40googlegroups.com) > > [https://groups.google.com/d/msgid/elasticsearch/35f6b64e-3787-4891-a3a8-518dfd7638e3%40googlegroups.com?utm\_medium=email&utm\_source=footer](https://groups.google.com/d/msgid/elasticsearch/35f6b64e-3787-4891-a3a8-518dfd7638e3%40googlegroups.com?utm_medium=email&utm_source=footer) > > . > > For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). To view this discussion on the web visit [https://groups.google.com/d/msgid/elasticsearch/CAKdsXoEcFAp443apYZfesyF7%2Bkj-KPMiimObDQ5wOeFuQiUHpw%40mail.gmail.com](https://groups.google.com/d/msgid/elasticsearch/CAKdsXoEcFAp443apYZfesyF7%2Bkj-KPMiimObDQ5wOeFuQiUHpw%40mail.gmail.com). For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [July 6, 2017, 1:06am UTC](https://discuss.elastic.co/t/elastic-search-dynamic-number-of-replicas-from-java-api/18563/22 "2017-07-06T01:06:43Z")
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