[logback-dev] [JIRA] Commented: (LBCLASSIC-260) Recording appender that dumps debug messages only when error occurs

[Tomasz Nurkiewicz (JIRA)]

    [ http://jira.qos.ch/browse/LBCLASSIC-260?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12419#action_12419 ] 

Tomasz Nurkiewicz commented on LBCLASSIC-260:
---------------------------------------------

Any updates on this issue? I guess more votes are required to consider incorporating it in Logback?

> Recording appender that dumps debug messages only when error occurs
> -------------------------------------------------------------------
>
>                 Key: LBCLASSIC-260
>                 URL: http://jira.qos.ch/browse/LBCLASSIC-260
>             Project: logback-classic
>          Issue Type: New Feature
>          Components: appender
>    Affects Versions: 0.9.28
>            Reporter: Tomasz Nurkiewicz
>            Assignee: Logback dev list
>
> Provide built-in utility appender that silently stores last few logging messages and dumps them (forwards to a target appender) only when an error occurs. Older logging events are replaced with new ones. This is a configuration example:
> <configuration>
>   <appender name="REC" class="ch.qos.logback.classic.RecordingAppender">
>     <appender-ref ref="STDOUT"/>
>     <maxEvents>1000</maxEvents>
>     <dumpThreshold>WARN</dumpThreshold>
>     <expiryTimeMs>15000</expiryTimeMs>
>   </appender>
>   <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
>     <encoder>
>       <pattern>%-4relative [%thread] %-5level - %msg%n</pattern>
>     </encoder>
>   </appender>
>   <root level="DEBUG">
>     <appender-ref ref="REC"/>
>   </root>
> </configuration>
> Such an appender is crafted manually by several users, it would be nice to provide it out of the box. I already implemented this feature (100% test coverage):
> https://github.com/nurkiewicz/logback/tree/recording-appender

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