[logback-user] opposite of ThresholdFilter or LevelRangeFilter available?

[Ceki Gülcü]

No, logback does not offer this functionality although it would be very easy to 
write one. Just copy and paste threshhold filter and inverse the comparison logic.

Here it is:

public class InvertedThresholdFilter extends Filter<ILoggingEvent> {

   Level thresholdLevel;

   @Override
   public FilterReply decide(ILoggingEvent event) {
     if (!isStarted()) {
       return FilterReply.NEUTRAL;
     }

     int eventLevelInt = event.getLevel().toInt();
     int thresholdLevelInt = thresholdLevel.toInt();
     if (eventLevelInt <= thresholdLevelInt) {
       return FilterReply.NEUTRAL;
     } else {
       return FilterReply.DENY;
     }
   }

   public void setLevel(String level) {
     this.thresholdLevel = Level.toLevel(level);
   }

   public void start() {
     if (this.level != null) {
       super.start();
     }
   }
}

HTH,

On 16/03/2010 5:13 PM, Christian Migowski wrote:
> Hi,
>
> does logback offer some functionality that can be thought of the
> opposite of the ThresholdFilter, i.e. I want an appender to log only
> events with levels BELOW and equal to the level specified.
> With log4j, there is the org.apache.log4j.varia.LevelRangeFilter
> available that can do such things, does something similar exists in
> logback?
>
> thanks in advance,
> regards,
> christia