java - What is the elegant way to handle interruptions on IO? -


i looking @ implementation of ioutils.copy() apache commons @ http://www.docjar.com/html/api/org/apache/commons/io/ioutils.java.html , boils down to:

public static long copylarge(inputstream input, outputstream output)         throws ioexception {     // default_buffer_size 4096     byte[] buffer = new byte[default_buffer_size];     long count = 0;     int n = 0;     while (-1 != (n = input.read(buffer))) {         output.write(buffer, 0, n);         count += n;     }     return count; }

i running in executor, task has timeout etc. if understand correctly if times out , future cancelled, thread keeps on running because there no check thread status anywhere in loop. leads dangerous leak , starvation.

seems need rewrite loop, sane , correct way handle this? throw new ioexception(new interruptedexception())? declare method throwing interruptedexception , throw (hate io helper methods)?

edit: checked bytestreams guava , seem doing same thing. i'm wondering why 2 major libraries don't support interruptions in such loop. missing something?

if close input and/or output, copylarge method throw exception, exiting loop.


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