# Spring Data Elasticsearch - Reactive Examples The `ReactiveElasticsearchClient` is a client based on `WebClient`. It uses the request/response objects provided by the Elasticsearch core project. Calls are directly operated on the reactive stack, not wrapping async (thread pool bound) responses into reactive types. ```java @SpringBootApplication class ApplicationConfiguration {} ``` The `ReactiveElasticsearchClient` can be used with the `ReactiveElasticsearchOperations` and `ReactiveElasticsearchRepository`. ```java @Autowired ReactiveElasticsearchOperations operations; // ... CriteriaQuery query = new CriteriaQuery("keywords").contains("java"); Flux result = operations.find(query, Conference.class); ``` ```java interface ConferenceRepository extends ReactiveCrudRepository { Flux findAllByKeywordsContains(String keyword); } // ... @Autowired ConferenceRepository repository; // ... Flux result = repository.findAllByKeywordsContains("java"); ``` **Requirements:** * [Maven](http://maven.apache.org/download.cgi) * [Elasticsearch](https://www.elastic.co/de/downloads/elasticsearch) **Running Elasticsearch** ```bash $ cd elasticsearch $ ./bin/elasticsearch ```