Fluent API

Both Elastic requests and queries offer a fluent API so that we could provide optional parameters in chained method calls for each request or query. If you are creating a Bool query that can possibly contain must, mustNot, should, and filter queries, you can just use one of the methods from the ElasticQuery object to create any of them and then just fluently chain any other to the original one.

ElasticQuery.must(ElasticQuery.range("version").gte(7).lt(10)).should(ElasticQuery.startsWith("name", "ZIO"))

And if we wanted to specify lower and upper bounds for a range query:

ElasticQuery.range(User.age).gte(18).lt(100)

Fluent API is also supported for parameters like routing and refresh, for example, if we wanted to add routing and refresh parameters to a deleteById request: Methods refreshTrue and refreshFalse are just shortcuts for using refresh(true) or refresh(false).

ElasticRequest.deleteById(IndexName("index"), DocumentId("documentId")).routing(Routing("routing")).refreshTrue

When creating aggregations we can also use withAgg method to add another aggregation and return the MultipleAggregations type that contains both aggregations.

ElasticAggregation.termsAggregation(name = "firstAggregation", field = "name")
  .withAgg(ElasticAggregation.termsAggregation(name = "secondAggregation", field = "age"))

Creating sort also supports fluent API, as it is shown in the code below:

ElasticSort.sortBy("age").mode(SortMode.Avg)
ElasticSort.sortBy("first_name").missing(Missing.First)
ElasticSort.sortBy("created_at").format("strict_date_optional_time_nanos")