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Posted to log4j-dev@logging.apache.org by "Ralph Goers (JIRA)" <ji...@apache.org> on 2012/04/30 09:44:14 UTC

[jira] [Resolved] (LOG4J2-3) Minimal (aka fine grained) locking

     [ https://issues.apache.org/jira/browse/LOG4J2-3?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ralph Goers resolved LOG4J2-3.
------------------------------

       Resolution: Fixed
    Fix Version/s: 2.0-alpha1
         Assignee: Ralph Goers

In Log4j 2 the core components are designed to be immutable and thread safe. However, annotations aren't being used since everything is expected to work that way. I'm going to mark this as resolved, however feel free to reopen this if you believe more needs to be done.
                
> Minimal (aka fine grained) locking
> ----------------------------------
>
>                 Key: LOG4J2-3
>                 URL: https://issues.apache.org/jira/browse/LOG4J2-3
>             Project: Log4j 2
>          Issue Type: Wish
>          Components: Core
>            Reporter: Curt Arnold
>            Assignee: Ralph Goers
>             Fix For: 2.0-alpha1
>
>
> Most components of log4j 1.2 are not inherently thread-safe but depend on locks that are acquired after the threshold check and are not released until processing is completed.  Unless the AsyncAppender is used, this effectively limits log4j 1.2 to handlng only one logging request at a time.
> Core classes in log4j 2.0 should not depend on external synchronization for thread safety.  
> Immutable classes should be preferred in the logging pipeline.  
> Class attributes (aka @Immutable and @ThreadSafe) should be used to document thread-safety.

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