Consider letting MonolineFormatter send output to stderr
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                 Key: GEOT-1555
                 URL: http://jira.codehaus.org/browse/GEOT-1555
             Project: GeoTools
          Issue Type: Wish
          Components: core metadata
    Affects Versions: 2.5-M0, 2.4-RC0
            Reporter: Martin Desruisseaux
            Assignee: Martin Desruisseaux
            Priority: Minor


The GeoTools {{MonolineFormatter}} is a formatter for the Java Logging 
framework that formats logs on a single line, a little bit like the Log4J 
output. By comparaison, the standard {{SimpleFormatter}} provided in the 
standard Java library formats the log on two lines.

The default Java Logging framework send the output to the standard _error_ 
stream, not the standard _output_ stream. From a very quick overview I did on 
some other logging frameworks, it seems to me that other frameworks do the 
same. I believe this is because the standard output stream is used for writing 
data processed by a program (like most Unix shell commands), and we don't want 
those data to be polluted by loggings. If a standard logging stream existed, we 
would use it. But since there is nothing like a logging stream, logging 
frameworks fallback on the error stream instead.

In GeoTools {{MonolineFormatter}}, we wrote a patch for redirecting loggings to 
the standard output stream. It was a user demand a few years ago. Given that 
GeoServer uses Log4J and uDig wants to use some framework bundled in Eclipse, 
maybe that old demand is not applicable anymore. I suggest to remove the hack 
and let {{MonolineFormatter}} send its output to the usual stream, i.e. the 
error stream like {{SimpleFormatter}} and many other logging framework do.

This changes will impact only users of the Java Logging framework. It does not 
impact Log4J users.


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