[logback-user] ThrowableProxy and instanceof in EventEvaluator

[Hontvári József]

Here is a stack trace, dumped from the evaluator expression. It does 
include a ThrowableProxyConverter.convert call.


java.lang.Exception: Stack 
trace                                                                                   

        at 
java.lang.Thread.dumpStack(Thread.java:1206)                                                            

        at 
mireka.E.f(E.java:21)                                                                                   

        at 
SC.eval0(SC.java:3)                                                                                     

        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native 
Method)                                            
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)                           

        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)                   

        at 
java.lang.reflect.Method.invoke(Method.java:597)                                                        

        at 
org.codehaus.janino.ScriptEvaluator.evaluate(ScriptEvaluator.java)                                      

        at 
org.codehaus.janino.ScriptEvaluator.evaluate(ScriptEvaluator.java)                                      

        at 
ch.qos.logback.core.boolex.JaninoEventEvaluatorBase.evaluate(JaninoEventEvaluatorBase.java:53)          

        at 
ch.qos.logback.classic.pattern.ThrowableProxyConverter.convert(ThrowableProxyConverter.java:109)        

        at 
ch.qos.logback.classic.pattern.ThrowableProxyConverter.convert(ThrowableProxyConverter.java:31)         

        at 
ch.qos.logback.core.pattern.FormattingConverter.write(FormattingConverter.java:32)                      

        at 
ch.qos.logback.core.pattern.PatternLayoutBase.writeLoopOnConverters(PatternLayoutBase.java:110)         

        at 
ch.qos.logback.classic.PatternLayout.doLayout(PatternLayout.java:132)                                   

        at 
ch.qos.logback.classic.PatternLayout.doLayout(PatternLayout.java:51)                                    

        at 
ch.qos.logback.core.WriterAppender.subAppend(WriterAppender.java:267)                                   

        at 
ch.qos.logback.core.WriterAppender.append(WriterAppender.java:117)                                      

        at 
ch.qos.logback.core.UnsynchronizedAppenderBase.doAppend(UnsynchronizedAppenderBase.java:89)             

        at 
ch.qos.logback.core.spi.AppenderAttachableImpl.appendLoopOnAppenders(AppenderAttachableImpl.java:60)    

        at 
ch.qos.logback.classic.Logger.appendLoopOnAppenders(Logger.java:271)                                    

        at 
ch.qos.logback.classic.Logger.callAppenders(Logger.java:258)                                            

        at 
ch.qos.logback.classic.Logger.buildLoggingEventAndAppend(Logger.java:440)                               

        at 
ch.qos.logback.classic.Logger.filterAndLog_0_Or3Plus(Logger.java:394)                                   

        at 
ch.qos.logback.classic.Logger.debug(Logger.java:517)                                                    

        at 
org.subethamail.smtp.server.Session.run(Session.java:119)                                               



Hontvári József írta:
> In an event evaluator called in an option of an "ex" formatting 
> specifier I would use a "throwable instanceof example" expression.
> This is the same as in Example 5.3 in the documentation, which also 
> uses instanceof.
>
> This doesn't work because the throwable object is not a Throwable but 
> a ThrowableProxy.
>
> Again, at another place, in the table at the beginning of the 
> "Evaluator Filters taking Java Expressions" section in chapter Filters 
> it is shown that the type of throwable is Throwable (annd not 
> ThrowableProxy).
>
> Somehow I still get a ThrowableProxy instead of Throwable.
>
>
>
>
>
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