First pre-release of elasticsearch 8.x 🥳
Client
Elastic Transport
The code for the dependency elasticsearch-transport has been promoted to its own repository and the project and gem have been renamed to elastic-transport. This gem now powers elasticsearch and elastic-enterprise-search. The elasticsearch-transport gem won't be maintained after the last release in the 7.x branch, in favour of elastic-transport.
API
X-Pack Deprecation
X-Pack has been deprecated. The elasticsearch-xpack gem will no longer be maintained after the last release in the 7.x branch. The "X-Pack" integration library codebase was merged into elasticsearch-api. All the functionality is available from elasticsearch-api. The xpack namespace was removed for accessing any APIs other than _xpack (client.xpack.info) and _xpack/usage (client.xpack.usage). But APIs which were previously available through the xpack namespace e.g.: client.xpack.machine_learning are now only available directly: client.machine_learning.
Parameter checking was removed
The code in elasticsearch-api will no longer validate all the parameters sent. It will only validate the required parameters such as those needed to build the path for the request. But other API parameters are going to be validated by Elasticsearch. This provides better forwards and backwards compatibility in the client.
Response object
In previous versions of the client, calling an API endpoint would return the JSON body of the response. With 8.0, we are returning a new Response object Elasticsearch::API::Response. It still behaves like a Hash to maintain backwards compatibility, but adds the status and headers methods from the Elastic::Transport:Transport::Response object:
elastic_ruby(main)> response = client.info
=> #<Elasticsearch::API::Response:0x000055752b0c50a8
@response=
#<Elastic::Transport::Transport::Response:0x000055752b0c50f8
@body=
{"name"=>"instance",
"cluster_name"=>"elasticsearch-8-0-0-SNAPSHOT-rest-test",
"cluster_uuid"=>"oIfRARuYRGuVYybjxQJ87w",
"version"=>
{"number"=>"8.0.0-SNAPSHOT",
"build_flavor"=>"default",
"build_type"=>"docker",
"build_hash"=>"7e23c54eb31cc101d1a4811b9ab9c4fd33ed6a8d",
"build_date"=>"2021-11-04T00:21:32.464485627Z",
"build_snapshot"=>true,
"lucene_version"=>"9.0.0",
"minimum_wire_compatibility_version"=>"7.16.0",
"minimum_index_compatibility_version"=>"7.0.0"},
"tagline"=>"You Know, for Search"},
@headers={"X-elastic-product"=>"Elasticsearch", "content-type"=>"application/json", "content-length"=>"567"},
@status=200>>
elastic_ruby(main)> response.status
=> 200
elastic_ruby(main)> response.headers
=> {"X-elastic-product"=>"Elasticsearch", "content-type"=>"application/json", "content-length"=>"567"}
elastic_ruby(main)> response['name']
=> "instance"
elastic_ruby(main)> response['tagline']
=> "You Know, for Search"