While I got my LevelRangeFilter working I didn't get an answer to #1 below.
Can someone answer that for me so that I can code appropriately?
Thanks,
Nick
> From: nic...@msn.com
> To: log4j-user@logging.apache.org
> Subject: plugins
> Date: Thu, 27 Aug 2015 14:51:58 -0400
>
>
>
>
> I've got a couple questions regarding plugins I'm hoping someone might be
> able to help me with. I checked the docs and it's still not quite clear.
>
> 1. I'm unsure what to set printObject to in my Plugin annotation. From
> http://logging.apache.org/log4j/2.x/manual/extending.html it says:
>
> "Specifying the printObject attribute with a value of "true" indicates that a
> call to toString will format the arguments to the filter as the configuration
> is being processed."
>
> which unfortunately doesn't clear things up any. I looked at the docs for
> printObject and that doesn't say anything other than it's a Boolean and its
> default is false.
>
> 2. I created a LevelRangeFiler and I'm trying to figure out how to get it
> loaded by log4j. I read over the instructions on plugins located at
> http://logging.apache.org/log4j/2.x/manual/plugins.html but since I'm a java
> noob I'm still a bit lost. I'm wondering, if I just have a .java class which
> I compile to a .class file, can that be used? If so, how?
>
> Below is the filter I wrote based on looking at the threshold filter example
> at http://logging.apache.org/log4j/2.x/manual/extending.html.
>
> import org.apache.logging.log4j.core.filter.AbstractFilter;
> import org.apache.logging.log4j.core.Filter;
> import org.apache.logging.log4j.core.config.plugins.Plugin;
> import org.apache.logging.log4j.core.config.plugins.PluginAttribute;
> import org.apache.logging.log4j.core.config.plugins.PluginFactory;
> import org.apache.logging.log4j.Level;
> import org.apache.logging.log4j.core.LogEvent;
> import org.apache.logging.log4j.core.Logger;
> import org.apache.logging.log4j.Marker;
> import org.apache.logging.log4j.message.Message;
>
> @Plugin(name="LevelRangeFilter", category="Core", elementType="filter",
> printObject=true)
> public class LevelRangeFilter extends AbstractFilter
> {
> private final Level minLevel;
> private final Level maxLevel;
>
> public LevelRangeFilter(Level minLevel, Level maxLevel,
> Filter.Result onMatch, Filter.Result onMismatch)
> {
> super(onMatch, onMismatch);
> this.minLevel = minLevel;
> this.maxLevel = maxLevel;
> }
>
> private Result filter(Level level)
> {
> if (level.isMoreSpecificThan(this.minLevel) &&
> level.isLessSpecificThan(this.maxLevel))
> {
> return this.onMatch;
> }
> return this.onMismatch;
> }
>
> public Filter.Result filter(Logger logger, Level level,
> Marker marker, String msg, Object[] params)
> {
> return filter(level);
> }
>
> public Filter.Result filter(Logger logger, Level level,
> Marker marker, Object msg, Throwable t)
> {
> return filter(level);
> }
>
> public Filter.Result filter(Logger logger, Level level,
> Marker marker, Message msg, Throwable t)
> {
> return filter(level);
> }
>
> public Filter.Result filter(LogEvent event)
> {
> return filter(event.getLevel());
> }
>
> @PluginFactory
> public static LevelRangeFilter createFilter(
> @PluginAttribute(value="minLevel",
> defaultString="DEBUG") Level minLevel,
> @PluginAttribute(value="maxLevel",
> defaultString="FATAL") Level maxLevel,
> @PluginAttribute(value="onMatch",
> defaultString="NEUTRAL") Result onMatch,
> @PluginAttribute(value="onMismatch",
> defaultString="DENY") Result onMismatch)
> {
> return new LevelRangeFilter(minLevel, maxLevel, onMatch, onMismatch);
> }
> }
>
> Thanks,
> Nick
>
>
>
