lucene - ElasticSeach JAVA API to find aliases given index -


how find aliases given index in elasticsearch using java?

by using rest api pretty easy

https://www.elastic.co/guide/en/elasticsearch/reference/1.x/indices-aliases.html#alias-retrieving

but unable find reference on how via java api

while working elasticsearch, ran issue needed list of aliases based on provided index.

while getting list of aliases pretty straightforward:

 client.admin().cluster()     .preparestate().execute()     .actionget().getstate()     .getmetadata().aliases();

i struggled find easy way able aliases given index without having iterate through first.

my first implementation looked this:

    immutableopenmap<string, immutableopenmap<string, aliasmetadata>> aliases = client.admin().cluster()         .preparestate().execute()         .actionget().getstate()         .getmetadata().aliases();      (objectcursor<string> key: aliases.keys()) {         immutableopenmap<string, aliasmetadata> indextoaliasesmap = client.admin().cluster()           .state(requests.clusterstaterequest())           .actionget().getstate()           .getmetadata().aliases().get(key.value);          if(indextoaliasesmap != null && !indextoaliasesmap.isempty()){             string index= indextoaliasesmap.keys().iterator().next().value;             string alias = indextoaliasesmap.values().iterator().next().value.alias();         }     }

i did not it... , after poking around, able idea on how more efficiently looking @ restgetindicesaliasesaction (package org.elasticsearch.rest.action.admin.indices.alias.get)

this end with:

    clusterstaterequest clusterstaterequest = requests.clusterstaterequest()             .routingtable(false)             .nodes(false)             .indices("your_index_name_goes_here");      objectlookupcontainer<string> setaliases= client             .admin().cluster().state(clusterstaterequest)             .actionget().getstate().getmetadata()             .aliases().keys();

you able find aliases index specified in setaliases

hope helps someone!


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