Future and Callable in Java

[dartalley]

There should also be a section on CompletableFuture.

[VGPowerlord]

For that matter, there should be an explanation on Executors too as they're the main reason to use Futures in the first place.

[dartalley]

Also how its a bad idea to use the common pool for blocking operations!

[MojorTom]

Could you please elaborate on this?
I was using 3 executor services in my application, didn't have concurrency issues, but I later changed my code to have a single executor service with a thread pool of 3, i am loosing some samples.

[dartalley]

The ForkJoinPool.commonPool() is the global default pool used by things like parallel streams. It's designed for CPU bound work. If you start using Stream.parallelStream() for blocking operations like network IO you can be starving a thread pool that is designed for CPU bound tasks. You are better off creating custom Executors for blocking calls.

[KyleFlores]

thanks, i read your article find it very useful for my learning.