Is it possible to remove an index with org.springframework.data.elasticsearch.core.ReactiveElasticsearchTemplate?

Question

The non-reactive counterpart of Elasticsearch Spring Data's org.springframework.data.elasticsearch.core.ElasticsearchTemplate provides a method public boolean deleteIndex(String indexName), which I can use to delete indices. However, I cannot find any hints of similar functionality in the ReactiveElasticsearchTemplate.

Answer 1

The DefaultReactiveElasticsearchClient which is created by

ReactiveRestClients.create(ClientConfiguration clientConfiguration)

implements the interface org.springframework.data.elasticsearch.client.reactive.ReactiveElasticsearchClient.Indices which has two methods to delete an index:

    default Mono<Void> deleteIndex(DeleteIndexRequest deleteIndexRequest) {
        return deleteIndex(HttpHeaders.EMPTY, deleteIndexRequest);
    }

    default Mono<Void> deleteIndex(Consumer<DeleteIndexRequest> consumer) {
        DeleteIndexRequest request = new DeleteIndexRequest();
        consumer.accept(request);
        return deleteIndex(request);
    }

    default Mono<Void> deleteIndex(DeleteIndexRequest deleteIndexRequest) {
        return deleteIndex(HttpHeaders.EMPTY, deleteIndexRequest);
    }

So nothing to pass in an index name directly, but DeleteIndexRequesthas a constructor that just takes index name(s).

((DefaultReactiveElasticsearchClient)client).deleteIndex(new DeleteIndexRequest(indexname)).

So currently it's ugly with this cast but can be done. We have a ticket to add this functionality in the Operations interface and implementations.