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https://issues.apache.org/jira/browse/LOG4J2-1823?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Matt Sicker closed LOG4J2-1823.
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Resolution: Fixed
Changed in master.
> Remove deprecation on MessageSupplier lambda functions in Logger API
> --------------------------------------------------------------------
>
> Key: LOG4J2-1823
> URL: https://issues.apache.org/jira/browse/LOG4J2-1823
> Project: Log4j 2
> Issue Type: Improvement
> Components: API
> Affects Versions: 2.6
> Reporter: Matt Sicker
> Assignee: Matt Sicker
> Fix For: 2.8.1
>
>
> The changes done in LOG4J2-1286 to deprecate MessageSupplier were not
> properly tested in practice. Using log4j-api ever since the deprecation, the
> following code causes deprecation warnings:
> {code}
> logger.info(() -> new SimpleMessage("Hello, world!"));
> {code}
> This is because the compiler interprets this as a {{MessageSupplier}} instead
> of the more generic {{Supplier<Message>}} version which is the intended API.
> Although manual use of {{MessageSupplier}} should be discouraged, users
> should not have to manually cast the above lambda just to prevent a
> deprecation warning:
> {code}
> logger.info((Supplier<Message>) () -> new SimpleMessage("Hello, world!"));
> {code}
> {{MessageSupplier}} should become a normal part of log4j-api with a note on
> both it and {{Supplier<T>}} that these interfaces would be removed in a
> log4j-api 3.0 release and replaced with the Java 8 version.
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