[jira] [Resolved] (IO-303) TeeOutputStream does not call branch.close() when main.close() throws an exception

["Gary D. Gregory (Resolved) (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/IO-303?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Gary D. Gregory resolved IO-303.
--------------------------------

    Resolution: Fixed

This is the solution I implemented. For simplicity's sake, note that the exception thrown is the last exception encountered.

{code:java}
    /**
     * Closes both output streams.
     * 
     * If closing the main output stream throws an exception, attempt to close the branch output stream.
     * 
     * If closing the main and branch output streams both throw exceptions, which exceptions is thrown by this method is
     * currently unspecified and subject to change.
     * 
     * @throws IOException
     *             if an I/O error occurs
     */
    @Override
    public void close() throws IOException {        
        try {
            super.close();
        } catch (IOException e) {
            this.branch.close();
            throw e;
        }
        this.branch.close();
    }
{code}
                
> TeeOutputStream does not call branch.close() when main.close() throws an exception
> ----------------------------------------------------------------------------------
>
>                 Key: IO-303
>                 URL: https://issues.apache.org/jira/browse/IO-303
>             Project: Commons IO
>          Issue Type: Bug
>          Components: Streams/Writers
>    Affects Versions: 2.1
>            Reporter: Fabian Barney
>            Assignee: Gary D. Gregory
>              Labels: close, stream
>             Fix For: 2.2
>
>
> TeeOutputStream.close() looks like this:
> {code:title=TeeOutputStream.java|borderStyle=solid}
>     /**
>      * Closes both streams. 
>      * @throws IOException if an I/O error occurs
>      */
>     @Override
>     public void close() throws IOException {
>         super.close();
>         this.branch.close();
>     }
> {code} 
> It is obvious that {{this.branch.close()}} is not executed when {{super.close()}} raises an exception. {{super.close()}} may in fact raise an IOException since {{ProxyOutputStream.handleIOException(IOException)}} is not overridden.

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