Custom thread pool in Java 8 parallel stream

Question

Is it possible to specify a custom thread pool for Java 8 parallel stream? I can not find it anywhere.

Imagine that I have a server application and I would like to

Answer 1

If you don't need a custom ThreadPool but you rather want to limit the number of concurrent tasks, you can use:

List paths = List.of("/path/file1.csv", "/path/file2.csv", "/path/file3.csv").stream().map(e -> Paths.get(e)).collect(toList());
List> partitions = Lists.partition(paths, 4); // Guava method

partitions.forEach(group -> group.parallelStream().forEach(csvFilePath -> {
       // do your processing   
}));

(Duplicate question asking for this is locked, so please bear me here)