Hi Thilo, Here is a way how to find the information with what you already know. You know that %xEx prints packaging data. If you look in PatternLayout [1], you'll see that on line 113, the string "xEx" is mapped to ExtendedThrowableProxyConverter [2]. This class derives from ThrowableProxyConverter and overrides the extraData() method. In line 25, you'll see that it invokes the subjoinPackagingData() method in ThrowableProxyUtil to fill in packaging data. See [3] for the implementation of this method. Let us know if this puts you on the right track. -- Ceki http://twitter.com/#!/ceki [1] http://logback.qos.ch/xref/ch/qos/logback/classic/PatternLayout.html#113 [2] http://logback.qos.ch/xref/ch/qos/logback/classic/pattern/ExtendedThrowableP... [3] http://logback.qos.ch/xref/ch/qos/logback/classic/spi/ThrowableProxyUtil.htm... On 20.06.2012 17:16, Thilo-Alexander Ginkel wrote:

Hi there,

I very much like the class packaging information displayed for a stacktrace with the %xEx{depth} pattern.

Due to its IThrowableRenderer mechanism, using %xEx{depth} with an HTMLLayout does not seem to make much sense, though. OTOH, the DefaultThrowableRenderer does not seem to emit this information by default (nor does it seem to be configurable).

Is there a way to get this class packaging information for information rendered by a HTMLLayout's IThrowableRenderer without reinventing the wheel? If the latter is needed, where is the code implemeting the class packaging information retrieval for %xEx{depth} located?

Thanks, Thilo