8263873783
Switches most search behavior extensions from push (`onModule(SearchModule)`) to pull (`implements SearchPlugin`). This effort in general gives plugin authors a much cleaner view of how to extend Elasticsearch and starts to set up portions of Elasticsearch as "the plugin API". This commit in particular does that for search-time behavior like customized suggesters, highlighters, score functions, and significance heuristics. It also switches most such customization to being done at search module construction time which is much, much easier to reason about from a testing perspective. It also helps significantly in the process of de-guice-ing Elasticsearch's startup. There are at least two major search time extensions that aren't covered in this commit that will simply have to wait for the next commit on the topic because this one has already grown large: custom aggregations and custom queries. These will likely live in the same SearchPlugin interface as well. |
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