[jira] [Commented] (LOG4J2-3388) Migration from log4j1.x to log4j2.x

["Piotr P. Karwasz (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/LOG4J2-3388?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17486245#comment-17486245 ] 

Piotr P. Karwasz commented on LOG4J2-3388:
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All depends on the kind of customizations you made. For the classes you mention:
 * {{PatternParser}} is {{{}final{}}}, but you can add patterns as plugins: the plugin must implement [PatternConverter|https://logging.apache.org/log4j/2.x/log4j-core/apidocs/org/apache/logging/log4j/core/pattern/PatternConverter.html],
 * {{FileAppender}} basically contains just the configuration logic and an {{OutputStream}} factory method. [OutputStreamAppender|https://logging.apache.org/log4j/2.x/log4j-core/apidocs/org/apache/logging/log4j/core/appender/OutputStreamAppender.html] is the real horse behind it. You can extend the latter.

 

> Migration from log4j1.x to log4j2.x
> -----------------------------------
>
>                 Key: LOG4J2-3388
>                 URL: https://issues.apache.org/jira/browse/LOG4J2-3388
>             Project: Log4j 2
>          Issue Type: Question
>            Reporter: Janardhan Naidu
>            Priority: Major
>
> We are planning to upgrade log4j1.x to log4j2.x.
> So we went through the migration document: 
> [https://logging.apache.org/log4j/2.x/manual/migration.html] 
> in the above document, It says that (They must not access methods and classes internal to the Log4j 1.x implementation such as Appenders, LoggerRepository or Category’s callAppenders method.) 
> and In our product, currently we are using log4j1.x and we are extending some of the log4j1.x classes like PatternParser, FileAppender etc... which were made final in log4j2.x  so can we make use of Log4j 1.x bridge.?  If yes how we can do that.
>  
> what could be the better option to migrate log4j 1.x to log4j 2.x as we are making use of log4j internal classes? 
>  



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