Is it possible for two ExecutorServices to share a thread pool?

Question

I've got a collection of records to process, and the processing can be parallelized, so I've created an ExecutorService (via Executors#newCachedThreadPool()). The processing of an individual record is, itself, composed of parallelizable steps, so I'd like to use another ExecutorService. Is there an easy way to make this new one use the same underlying thread pool? Is it even desirable? Thanks.

Answer 1

To answer your question: no, two ExecutorService objects cannot share a thread pool. However you can share an ExecutorService between your objects, or alternatively create several Executors, as necessary, though this is less recommended.

Best solution: share the Executor between your objects.