log rollover should be configurable using %d multiple times in file name pattern
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Key: LBCORE-242
URL: http://jira.qos.ch/browse/LBCORE-242
Project: logback-core
Issue Type: Improvement
Components: Rolling
Affects Versions: 1.0.0
Reporter: Thomas Corte
Assignee: Logback dev list
Trying to configure a log rollover with logs being *rolled daily* and put into
a directory named "yyyy-MM", i.e. one folder for each *month* containing that
month's logs, I'm using the following appender config:
{noformat}
<appender name="FILE" class="ch.qos.logback.core.rolling.RollingFileAppender">
<file>app.log</file>
<rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
<!-- rollover every minute -->
<fileNamePattern%d{yyyy-MM}/app.%d{yyyy-MM-dd}.log</fileNamePattern>
</rollingPolicy>
<encoder>
<pattern>%d{"yyyy-MM-dd HH:mm:ss,SSS"} [%thread] %-5level %logger{36} -
%msg%n%xEx</pattern>
</encoder>
</appender>
{noformat}
However, it seems as if the current logback implementation merely considers the
first %d specification, which leads to a log rotation only once per month
instead of the desired once per day frequency.
I figure this is because via %d, the log rotation frequency and the file name
pattern are somewhat tied together and seemingly can't be specified
independently.
It would be nice if either multiple %d specifiers would be supported, with an
option to specify which one should be considered for the rollover period.
Even better, it might be a good idea to support the rollover period to be
specified separately and independently from the file name pattern; arguably,
using the file name patterns for both is somewhat convenient, but violates the
principle of "separation of concerns".
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