Add a pattern resolver to <file> property of FileAppnder
--------------------------------------------------------
Key: LBCORE-68
URL: http://jira.qos.ch/browse/LBCORE-68
Project: logback-core
Issue Type: New Feature
Components: Appender, Joran
Affects Versions: 0.9.11
Environment: Ubuntu 8.04, J2SE 6
Reporter: Nicolas Giraud
Assignee: Logback dev list
Following discussion on the mailing list, it would be very convenient to be
able to use patterns in the filename of a FileAppender. My initial expectation
was to be able to do something like:
<appender name="myFileAppender" class="ch.qos.logback.core.FileAppender">
<file>${logFolder}/SomePrefix.%d.someExt</file>
[...]
</appender>
where %d would be substituted by the current date. However Ralph Goers, when
replying to my question on the mailing list, suggested a more flexibl approach:
<appender name="myFileAppender" class="ch.qos.logback.core.FileAppender">
<File
resolver="com.mycorp.logback.MyPatternResolver">someName.%{host}.%{datetime}.log</File>
[...]
</appender>
with MyPatternResolver implementing an interface like:
package ch.qos.logback.core.pattern;
public interface Resolver {
String resolve(String pattern);
}
Providing a default implementation allowing to generate timestamp, use system
properties, would be nice too.
Currently this can be done programmatically, but it would be most convenient to
have the possibility to do this using the Joran configurator.
Best regards,
Nicolas
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