AutoCloseable blocking or not

[Kasper Nielsen]

Hi,

I have a question about the AutoCloseable interface. Since I cannot
find any mention about how asynchronously closeable resources should
be handled.

Say I wanted juc.ThreadPoolExecutorService to implement AutoCloseable.
When close() returned should the executor be in the shutdown phase or
in the terminated phase?

In other words should I implement close() like this (which I believe)

public void close() {
 executor.shutdown();
 executor.awaitTermination(Long.MAX_VALUE, TimeUnit.SECONDS); //ignore
any interrupted exceptions
}

or like this

public void close() {
 executor.shutdown();
}

- Kasper