Add mappings to an Elasticsearch index in realtime

 

Changing mapping on existing index is not an easy task. You may find the reason and possible solutions in here:

http://www.elasticsearch.org/blog/changing-mapping-with-zero-downtime/

to get current mapping details, here is the sample code:

 

ClusterState cs = client.admin().cluster().prepareState().setFilterIndices("myIndex").execute().actionGet().getState();

IndexMetaData imd = cs.getMetaData().index("myIndex")

MappingMetaData mdd = imd.mapping("myType")

 

 

Put Mappings In Real time:

 

private void putMapping() {

    if (client != null) {

       if (client.admin().indices().prepareExists(IndexName).execute().actionGet().isExists()) {

          XContentBuilder mappings = null;

          try {

             mappings = XContentFactory.jsonBuilder()

		.startObject()

		    .startObject(INDEX_TYPE)

		        .startObject("properties")

			.startObject(FIELD_NAME)

       			 .field("type","string")

		      	 .field("store","yes")

			 .field("index", "analyzed")

			 .field("analyzer", "simple")

			.endObject()

		        .endObject()

		      .endObject()

		.endObject();

          } catch (IOException e) {

	     e.printStackTrace();

          }

          client.admin().indices().prepareClose(IndexName).execute().actionGet();

          client.admin().indices().prepareDeleteMapping(IndexName).setType(INDEX_TYPE).execute().actionGet();

          client.admin().indices().preparePutMapping(IndexName).setIgnoreConflicts(true).setType(INDEX_TYPE).setSource(mappings).execute().actionGet();

	  client.admin().indices().prepareOpen(IndexName).execute().actionGet();

       }



    } else {

	throw new IllegalStateException(" Elastic Search not initialized properly..");

    }

}