SPI for integrators to provide their own thread pools

Description

In particular Infinispan has globally-configured thread pools. It would be nice to allow them to plug in their own thread pool to replace the Lucene backend thread pool, for example.

See https://infinispan.zulipchat.com/#narrow/stream/118645-infinispan/topic/Query.20-.20thread.20pools

Environment

None

Assignee

Unassigned

Reporter

Yoann Rodière

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Pull Request

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Fix versions

Priority

Major
Configure