spring-data-elasticsearch/src/main/asciidoc/reference/elasticsearch-new.adoc

[[new-features]]
= What's new

[[new-features.4-0-0]]
== New in Spring Data Elasticsearch 4.0

* Uses Spring 5.2.
* Upgrade to Elasticsearch 7.6.2.
* Deprecation of `TransportClient` usage.
* Implements most of the mapping-types available for the index mappings.
* Removal of the Jackson `ObjectMapper`, now using the <<elasticsearch.mapping.meta-model,MappingElasticsearchConverter>>
* Cleanup of the API in the `*Operations` interfaces, grouping and renaming methods so that they match the Elasticsearch API, deprecating the old methods, aligning with other Spring Data modules.
* Introduction of `SearchHit<T>` class to represent a found document together with the relevant result metadata for this document (i.e. _sortValues_).
* Introduction of the `SearchHits<T>` class to represent a whole search result together with the
metadata for the complete search result (i.e. _max_score_).
* Introduction of `SearchPage<T>` class to represent a paged result containing a `SearchHits<T>` instance.
* Introduction of the `GeoDistanceOrder` class to be able to create sorting by geographical distance
* Implementation of Auditing Support
* Implementation of lifecycle entity callbacks

[[new-features.3-2-0]]
== New in Spring Data Elasticsearch 3.2

* Secured Elasticsearch cluster support with Basic Authentication and SSL transport.
* Upgrade to Elasticsearch 6.8.1.
* Reactive programming support with <<elasticsearch.reactive.operations>> and <<elasticsearch.reactive.repositories>>.
* Introduction of the <<elasticsearch.mapping.meta-model,ElasticsearchEntityMapper>> as an alternative to the Jackson `ObjectMapper`.
* Field name customization in `@Field`.
* Support for Delete by Query.