[jira] [Closed] (IO-448) FileUtils.waitFor(...) swallows thread interrupted status

["Kristian Rosenvold (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/IO-448?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Kristian Rosenvold closed IO-448.
---------------------------------
       Resolution: Fixed
    Fix Version/s: 2.5
         Assignee: Kristian Rosenvold

> FileUtils.waitFor(...) swallows thread interrupted status
> ---------------------------------------------------------
>
>                 Key: IO-448
>                 URL: https://issues.apache.org/jira/browse/IO-448
>             Project: Commons IO
>          Issue Type: Bug
>          Components: Utilities
>    Affects Versions: 2.4
>            Reporter: Björn Buchner
>            Assignee: Kristian Rosenvold
>            Priority: Minor
>             Fix For: 2.5
>
>
> The method waits for a file to appear for a given amount of time. To do so it calls Thread.sleep several times. If the thread is interrupted, the interrupt will be ignored by catching the ThreadInterrupted exception and waiting further.
> Catching the ThreadInterrupted exception automatically clears the thread's interrupted flag. Consequently the calling method has no chance to detect whether the thread was interrupted. A possible solution is to restore the interrupted status before returning - something like this:
> {code}
>     public static boolean waitFor(File file, int seconds) {
>         int timeout = 0;
>         int tick = 0;
>         boolean wasInterrupted = false;
>         try {
>             while (!file.exists()) {
>                 // ...
>                 try {
>                     Thread.sleep(100);
>                 } catch (InterruptedException ignore) {
>                     wasInterrupted = true;
>                 } catch (Exception ex) {
>                     break;
>                 }
>             }
>             return true;
>         } finally {
>             if (wasInterrupted) {
>                    Thread.currentThread.interrupt();
>             }
>         }
>     }
> {code}



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