Elasticsearch - Create index when not exist

createIndex.java

private void createIndex() {
    boolean indexExists = client.admin().indices().prepareExists(INDEX_NAME).execute().actionGet().isExists();
    if (!indexExists) {
        if (LOGGER.isInfoEnabled()) {
            LOGGER.info("Index {} doesn't exist, create it now.", INDEX_NAME);
        }
        client.admin().indices().prepareCreate(INDEX_NAME).execute();
    }
}