Rotating GC Log files with qos Logback - garbage-collection

Question

I am trying to rotate my gc.log file every time my application starts up.
I am using this file appender in my logback.xml file.
...
<appender name="GCFILE" class="ch.qos.logback.core.rolling.RollingFileAppender">
<file>${log.directory}/gc.log</file>
<rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
<fileNamePattern>${log.directory}/gc.log.%d{yyyyMMdd}_%d{HHmmss,aux}.gz</fileNamePattern>
<TimeBasedFileNamingAndTriggeringPolicy class="com.ga.omni.utility.StartupTriggeringPolicy" />
<maxHistory>50</maxHistory>
</rollingPolicy>
<encoder>
<pattern>%msg%n</pattern>
</encoder>
</appender>
...
<root level="INFO">
<appender-ref ref="FILE" />
<appender-ref ref="GCFILE" />
</root>
(the "FILE" ref is a reference to our default logging file for the app.)
The appender references a TimeBasedFileNamingAndTriggeringPolicy named StartupTriggeringPolicy:
#NoAutoStart //won't be autostarted by Joran at config time
public class StartupTriggeringPolicy<E> extends DefaultTimeBasedFileNamingAndTriggeringPolicy<E> {
Logger log = LoggerFactory.getLogger(StartupTriggeringPolicy.class);
public StartupTriggeringPolicy() {
log.info("StartupTriggeringPolicy constructor called");
}
#Override
public void start() {
log.info("StartupTriggeringPolicy start() called... initialting gc.log rollover");
super.start();
//only check this once, on startup.
nextCheck = 0L;
isTriggeringEvent(null, null);
try {
tbrp.rollover();
log.info("StartupTriggeringPolicy start() called... gc.log successfully rolled over.");
} catch (RolloverFailure e) {
log.warn("Error rolling over gc.log file in StartupTriggeringPolicy.start()");
//Do nothing
}
}
}
The trouble that I'm facing is that the app starts up, but the StartupTriggeringPolicy never seems to get instantiated. None of the logs from the constructor or start() method are written, and if I put breakpoints in those methods, the breakpoints don't get hit.
Any suggestions would be greatly apperciated!