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Posted to notifications@logging.apache.org by "ASF subversion and git services (Jira)" <ji...@apache.org> on 2020/02/16 19:01:00 UTC
[jira] [Commented] (LOG4J2-2604) Generate reflect-config.json for
GraalVM during annotation processing
[ https://issues.apache.org/jira/browse/LOG4J2-2604?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17037917#comment-17037917 ]
ASF subversion and git services commented on LOG4J2-2604:
---------------------------------------------------------
Commit 6b9035d8a2fb85cefe23e7a80aa17d6b4337604c in logging-log4j2's branch refs/heads/master from terrence
[ https://gitbox.apache.org/repos/asf?p=logging-log4j2.git;h=6b9035d ]
[LOG4J2-2604/2649] Change MethodHandle to Constructor to adapt graalvm (#291)
* change MethodHandle to Constructor
* format space.
* add comment about why change to Constructor
> Generate reflect-config.json for GraalVM during annotation processing
> ---------------------------------------------------------------------
>
> Key: LOG4J2-2604
> URL: https://issues.apache.org/jira/browse/LOG4J2-2604
> Project: Log4j 2
> Issue Type: New Feature
> Components: Configurators
> Reporter: Remko Popma
> Priority: Major
> Time Spent: 1h 20m
> Remaining Estimate: 0h
>
> See [https://github.com/oracle/graal/issues/1209] and [https://github.com/oracle/graal/issues/808]
> Currently log4j2 cannot be used in GraalVM native images because it uses reflection.
> Graal SubstrateVM can [deal with reflection|https://github.com/oracle/graal/blob/master/substratevm/REFLECTION.md] when it’s clear to the AOT compiler what classes, methods and fields are reflected on. The log4j plugin mechanism is too dynamic for the automatic reflection analysis.
> This can be solved by providing a {{reflect-config.json}} configuration file, which may be embedded in the jar under {{META-INF/native-image/some/path/}}.
> The annotation processor is the natural place to generate this configuration file, so that applications that provide custom Log4j components will have the necessary {{META-INF/native-image/org/apache/logging/log4j/core/config/plugins/reflect-config.json}} to accompany their {{META-INF/org/apache/logging/log4j/core/config/plugins/Log4j2Plugins.dat}} file in their jar.
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