弹性搜索以找到索引存在或不使用Java API

Question

Before am indexing the documents i want to check whether my index name is already existis in the ElasticSearcch or not.

Please find the below piece of code which am using RestLowLevelClient to find my index existis.

public boolean checkIfIndexExists(String indexName) throws IOException {
        Response response = client.getLowLevelClient().performRequest("HEAD", "/" + indexName);
        int statusCode = response.getStatusLine().getStatusCode(); 
        return (statusCode != 404);
    }

But i want to using RestHighLevelClient and how i can modify the same code.

Answer 1

You can simply use the Indices Exists API :

public boolean checkIfIndexExists(String indexName) throws IOException {
    GetIndexRequest request = new GetIndexRequest();
    request.indices(indexName); 
    return client.indices().exists(request, RequestOptions.DEFAULT);
}