AsynchronousFileChannel.open() - is it blocking? (original) (raw)

Zhong Yu zhong.j.yu at gmail.com
Fri Mar 2 05:46:35 PST 2012

Thanks Alan.

Are you sure about size()? If a file is open, reading its size attribute may require IO?

And what about close()? Could it also block?

Zhong Yu

On Fri, Mar 2, 2012 at 2:46 AM, Alan Bateman <Alan.Bateman at oracle.com> wrote:

On 01/03/2012 22:52, Zhong Yu wrote:

Is open() a potentially blocking action? Apparently so because some sanity checking (e.g. existence of the file) requires disk spin. If that's the case, it should probably be explicitly documented. And after open(), are following methods blocking or non-blocking? size(); truncate(); The asynchronous operations defined by AsynchronousFileChannel are read, write, and lock. The other methods, including the open method to create or open the file, are synchronous and potentially blocking. -Alan.

More information about the nio-dev mailing list