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From "Brett Bergquist (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DERBY-6350) Provide a rolling file implementation of derby.log
Date Mon, 23 Sep 2013 18:03:04 GMT

    [ https://issues.apache.org/jira/browse/DERBY-6350?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13774794#comment-13774794

Brett Bergquist commented on DERBY-6350:

I have implemented this as follows and will attach a patch shortly.

I added a new property:


I chose this so that in the future if there is an "logger" implementation, then one could
also support:


When this is set to "rollingFile", then internally, this passes in "org.apache.derby.impl.services.stream.RollingFileStreamProvider.getOutputStream"
to the code that  processes "derby.stream.error.method".   

So now "org.apache.derby.impl.services.stream.RollingFileStreamProvider.getOutputStream" is
not exposed to the user.  

I also modified to not catch any IOException or SecurityException in "org.apache.derby.impl.services.stream.RollingFileStreamProvider".
 If this occurs normal "derby.log" will be used and the error will be logged to "derby.log".
 This is similar as to what happens if you use "derby.stream.error.file" and point it at a
file that cannot be accessed (ie. the directory does not exist for example).   

> Provide a rolling file implementation of derby.log
> --------------------------------------------------
>                 Key: DERBY-6350
>                 URL: https://issues.apache.org/jira/browse/DERBY-6350
>             Project: Derby
>          Issue Type: Improvement
>          Components: Miscellaneous
>            Reporter: Brett Bergquist
>            Priority: Minor
>              Labels: features
>         Attachments: rollingfilelog.patch.txt
> By default, derby.log grows without bounds if the derby.infolog.append property is set
to "true".   Setting this to "true" helps in a hands off production environment to ensure
that if Derby restarts, the derby.log which might contain important information is not lost.
 On the other hand, when set the "true" the derby.log grows without bounds.  This is problematic
in a long running system.  
> What is really needed is the ability to have a rolling derby.log file support where the
maximum file size and maximum number of files can be specified.  Derby has the ability to
configure the location of the log file (ie. derby.stream.error.file) and also two methods
of redirecting the error stream (.ie derby.stream.error.method and derby.stream.error.field).
 There is no standard implementation that supports a rolling derby.log however.
> This facility should be part of the core Derby system so that it works in both embedded
and network server models.

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