Genesis and Use of the New Java Client for Elasticsearch

on YouTube ↗47m

" summary

A new Java client for Elasticsearch released in October 2021 was designed to be lighter, faster and mostly generated from a formal model: the team modeled the ~400 API endpoints and ~2000 data types using TypeScript types compiled into a generation model instead of OpenAPI. The talk explains the development workflow for that generated library and demonstrates using fluent functional builders and tagged unions in Java to provide a DSL-like, IDE-autocomplete-driven experience for navigating large, polymorphic tree structures with many variants.

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" chapters (13)

1. 0:00Intro
2. 1:40The Elasticsearch API in numbers
3. 2:48Architecture of existing Java clients
4. 4:10Problems with the High Level Rest Client
5. 8:37Architecture of the new Java client
6. 24:06Polymorphic types
7. 26:55ReST API specification Open API?
8. 28:27JSON API specification TypeScript!
9. 29:49Example: search request
10. 31:46Example: search response
11. 32:48Example: query
12. 34:35Validating the specification
13. 37:50Code generation pipelines

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