commons-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Sebb (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (IO-376) FileUtils.copyFile for the locked file (windows)
Date Tue, 16 Apr 2013 11:15:17 GMT

    [ https://issues.apache.org/jira/browse/IO-376?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13632754#comment-13632754
] 

Sebb commented on IO-376:
-------------------------

Is this even possible from Java? 
Last time I checked, I could not find a way to open a locked file.

A work-round might be to use a system call to run DOS copy - but does that even work?
                
> FileUtils.copyFile for the locked file (windows)
> ------------------------------------------------
>
>                 Key: IO-376
>                 URL: https://issues.apache.org/jira/browse/IO-376
>             Project: Commons IO
>          Issue Type: New Feature
>          Components: Streams/Writers
>    Affects Versions: 2.4
>         Environment: Windows
>            Reporter: Peter B.
>            Priority: Minor
>
> The use case:
> - log4j writes to the file using RollingFileAppender.
> - in parallel I need to read the file contents for later manipulation (storing it's contents
elsewhere)
> Problem on windows:
> - I open FileInputStream for reading from file
> - when using IOUtils.copy(InputStream input, OutputStream output) exception is thrown:
> {code} 
> java.io.IOException: The process cannot access the file because another process has locked
a portion of the file
> {code} 
> It would be great to have API enabling to copy contents of the locked file (on windows)
to OutputStream.
> The method available in the API currently:
> {code:java} 
> FileUtils.copyFile(File input, OutputStream output)
> {code} 
> does the job, except for the files that are locked (in the windows environment) as they're
currently written to.
> Some of the functionality is already in use in the: Tailer
> However (non-bloked) copying full contents is not provided.
> I'd need to retrieve a snapshot of the file.
> Not sure about the right API, but generally I see 2 options:
> - custom (File)InputSteam implementation or maybe
> - custom FileUtils.copyFile(File input, OutputStream output)

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira

Mime
View raw message