On Nov 13, 2007, at 8:43 AM, Mak, Howard wrote:
Hello,
I would like to suggest the following changes to
DailyRollingFileAppender. If this is not the appropriate forum for
this email, please direct me to the proper channels as I'm new to
Log4j. ;)
Feature:
- Allow date pattern to be embedded anywhere in the
file name [not just appended to the end].
- Allow easy addition of custom placeholders in file
name.
Rationale:
- Preserve file extensions in Windows [so that I can
use the same associated program to open both the pending log and
the archived logs]
- Use same log4j.properties to output to different
files depending on run-time state
- Solves http://www.mail-archive.com/log4j-
[EMAIL PROTECTED]/msg06750.html using simpler syntax
Use cases:
1. Typical usage.
Given properties:
log4j.appender.F =
org.apache.log4j.DailyRollingFileAppender
log4j.appender.F.File = trace%d.log
log4j.appender.F.DatePattern = '.'yyyyMMdd
Output goes to
trace.log
trace.20071111.log
trace.20071112.log
2. For reverse compatibility, "%d" is implicitly appended if
omitted.
Given:
log4j.appender.F =
org.apache.log4j.DailyRollingFileAppender
log4j.appender.F.File = trace.log
log4j.appender.F.DatePattern = '.'yyyyMMdd
Output goes to
trace.log
trace.log.20071111
trace.log.20071112
3. Custom placeholder illustration. Output to different
locations depending on the process ID.
Given:
log4j.appender.F =
custom.DailyRollingFileAppenderSubclass
log4j.appender.F.File = trace%p%d.log
log4j.appender.F.DatePattern = '.'yyyyMMdd
where
%p = process ID
Output goes to
trace.log
trace.2342.20071111.log
trace.2342.20071112.log
Thanks for your consideration.
- Howard
<DailyRollingFileAppender.java.patch>
<DailyRollingFileAppender.java>
<DailyRollingFileAppender.java.orig-1.2.15.bak>
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I think it is likely that all of l the use cases are already covered
by the org.apache.log4j.rolling.RollingFileAppender in the extras
companion. The org.apache.log4j.rolling.RollingFileAppender was
designed to replace the org.apache.log4j.RollingFileAppender and
org.apache.log4j.DailyRollingFileAppender.
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