Delete entire index in ElasticSearch

Question

I'm approaching ElastichSearch with a Java client. I'm trying to delete an entire index. I'm able to delete a single document with the following code:

DeleteResponse response = client.prepareDelete("twitter", "tweet", "1").get();

I would like to delete all documents for a given index in a single instruction. Note that I'm using the version 2.2.

Thanks

EDIT: I've found a similar question but it refers to an old API version. I'm currently working with version 2.2.

Answer 1

The easiest way would be to delete your index, then recreate it.

DeleteIndexResponse deleteResponse = client.admin().indices().delete(new DeleteIndexRequest("your-index")).actionGet()

then

client.admin().indices().prepareCreate("your-index").get();

This will work with the 2.2 api

Answer 2

Same solution as in maximede's answer but using newer version of RestHighLevelClient (non depreciated):

// delete current index
var deleteRequest = new DeleteIndexRequest("index-name");
client.indices().delete(deleteRequest, RequestOptions.DEFAULT);

// create new one
CreateIndexRequest request = new CreateIndexRequest("index-name");
client.indices().create(request, RequestOptions.DEFAULT);

Please make sure to import from the right package:

org.elasticsearch.action.admin.indices.delete.DeleteIndexRequest
org.elasticsearch.client.indices.CreateIndexRequest;

Works fine with micronaut framework io.micronaut.elasticsearch:micronaut-elasticsearch:4.0.0