[jira] [Updated] (LOG4J2-3472) Allow configuration of custom Disruptor WaitStrategy

["Volkan Yazici (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/LOG4J2-3472?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Volkan Yazici updated LOG4J2-3472:
----------------------------------
    Fix Version/s: 2.18.0
                       (was: 2.17.3)

> Allow configuration of custom Disruptor WaitStrategy
> ----------------------------------------------------
>
>                 Key: LOG4J2-3472
>                 URL: https://issues.apache.org/jira/browse/LOG4J2-3472
>             Project: Log4j 2
>          Issue Type: New Feature
>          Components: Configuration, Core
>    Affects Versions: 2.17.2
>            Reporter: Remko Popma
>            Assignee: Remko Popma
>            Priority: Major
>             Fix For: 2.18.0
>
>
> See also LOG4J2-2858.
> Currently Log4j allows a fixed set of disruptor WaitStrategies to be configured. The current code has two drawbacks:
>  * the fixed set does not include all built-in WaitStrategies that the disruptor library provides
>  * the configuration does not allow custom implementations of the {{com.lmax.disruptor.WaitStrategy}} interface.
> h4. Proposal:
> Introduce a {{org.apache.logging.log4j.core.async.WaitStrategyProvider}} interface. Users may configure instances of this interface by setting system property {{log4j2.asyncWaitStrategyProvider}}.
> Proposed implementation is to modify {{DisruptorUtil::createWaitStrategy}} to check for the existence of this system property, before doing anything else. If this property exists and a class can be instantiated based on the value of this property, and the resulting WaitStrategyProvider instance provides a non-null {{com.lmax.disruptor.WaitStrategy}} instance, then this waitstrategy is returned from  {{DisruptorUtil::createWaitStrategy}}. Otherwise, we fall back to the existing logic.
> Note that for simplicity I do not propose to have separate system properties for Async Loggers and Async LoggerConfigs.



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