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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (LOG4J2-1838) Add support for appending common suffix to each line of throwable stack trace
Date Tue, 07 Mar 2017 16:38:38 GMT

    [ https://issues.apache.org/jira/browse/LOG4J2-1838?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15899729#comment-15899729

ASF GitHub Bot commented on LOG4J2-1838:

Github user jvz commented on the issue:

    That's a pretty good point! I should have time later today to merge this unless someone
else swoops in during the day to do it. Thanks for the contribution!

> Add support for appending common suffix to each line of throwable stack trace
> -----------------------------------------------------------------------------
>                 Key: LOG4J2-1838
>                 URL: https://issues.apache.org/jira/browse/LOG4J2-1838
>             Project: Log4j 2
>          Issue Type: New Feature
>          Components: Pattern Converters
>    Affects Versions: 2.8.1
>            Reporter: Zilong Song
>              Labels: features
>             Fix For: 2.8.2
> Add support for appending common suffix to each line of throwable stack trace. The suffix
can be configured by patterns just like patterns used elsewhere. 
> For example, pattern {{%xEx&#123;suffix(- %mdc&#123;key&#125;)&#125;}}
will append a string generated by pattern {{-&#32;}}  and {{%mdc&#123;key&#125;}}.
> But patterns that handles throwable will be automatically ignored, because they will
make the rendered result confusing. So pattern {{%xEx&#123;suffix(- %rEx%mdc&#123;key&#125;)&#125;}}
has the same effect with {{%xEx&#123;suffix(- %mdc&#123;key&#125;)&#125;}},
as if the nested {{%rEx}} pattern has never appeared.
> Following is an example of the with such suffix: 
> {code:title=stack trace, with pattern "%xEx&#123;suffix(- %mdc&#123;key&#125;)&#125;"
and MDC(key)="test mdc suffix"|borderStyle=solid}
> java.lang.IllegalArgumentException: IllegalArgument - test mdc suffix
> 	at org.apache.logging.log4j.core.pattern.ExtendedThrowablePatternConverterTest.testSuffixFromNormalPattern(ExtendedThrowablePatternConverterTest.java:48)
[test-classes/:?] - test mdc suffix
> 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_91] - test
mdc suffix
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
~[?:1.8.0_91] - test mdc suffix
> 	at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_91] - test mdc suffix
> 	at com.intellij.rt.execution.application.AppMain.main(AppMain.java:147) [idea_rt.jar:?]
- test mdc suffix
> Caused by: java.lang.NullPointerException: null pointer - test mdc suffix
> 	at org.apache.logging.log4j.core.pattern.ExtendedThrowablePatternConverterTest.testSuffixFromNormalPattern(ExtendedThrowablePatternConverterTest.java:47)
~[test-classes/:?] - test mdc suffix
> 	... 27 more - test mdc suffix
> }}
> {code}

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