====== RestHighLevelClient ======
  * [[search:elasticsearch|Elastic Search]]가 제공해주는 Java 용 Client.
  * 동기/비동기 처리가 가능하다. 따라서, [[reactive_programming:reactor|Project Reactor]], [[springframework:webflux|Spring WebFlux]] 등과 연동이 가능하다.

===== 참조 =====
  * [[https://dzone.com/articles/spring-reactor-and-elasticsearch-from-callbacks-to|Spring, Reactor, and ElasticSearch: From Callbacks to Reactive Streams]]
  * [[https://nevercaution.github.io/2018/06/17/elasticsearch-java-high-level-client/|Elasticsearch Java Rest High Level Client 사용하기]]