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https://issues.apache.org/jira/browse/LOG4J2-1874?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15970437#comment-15970437
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ASF GitHub Bot commented on LOG4J2-1874:
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Github user leventov commented on the issue:
https://github.com/apache/logging-log4j2/pull/71
> A complicating factor is that there may be users who subclassed any of
these classes, and we don't want to break their stuff.
If users could implement `ByteBufferDestination`, there is a problem,
because new methods added to this interface.
> Did all the tests pass for you?
Yes, except obviously unrelated failures with something about TCP/network
> Add ByteBufferDestionation.write(ByteBuffer) and write(byte[], int, int)
> methods and call them from TextEncoderHelper whenever possible
> ---------------------------------------------------------------------------------------------------------------------------------------
>
> Key: LOG4J2-1874
> URL: https://issues.apache.org/jira/browse/LOG4J2-1874
> Project: Log4j 2
> Issue Type: Improvement
> Reporter: Roman Leventov
> Assignee: Remko Popma
>
> Existing ByteBufferDestination API: getByteBuffer() and drain() is designed
> so that synchronization couldn't be avoided. This doesn't allow to implement
> LOG4J2-928.
> Github PR: https://github.com/apache/logging-log4j2/pull/71
> Added methods: write(ByteBuffer data) and write(byte[] data, int offset, int
> length) are designed so that they should care about synchronization
> themselves, internally, if needed. They should also synchronize with possible
> concurrent users of the synchronized getByteBuffer() + drain() API.
> Nevertheless, it allows for ByteBufferDestination implementations to
> implement write() methods without lock-free.
> TextEncoderHelper (hence StringBuilderEncoder, which delegates it's logic to
> TextEncoderHelper) is changed so that it calls ByteBufferDestination.write()
> whenever possible. There is an expectation that most of encoded events fit
> the thread-local buffers, and write() could be called instead of writing to
> destination.getByteBuffer() with synchronization.
> The PR also includes a sanity improvement: uses ByteBuffer.arrayOffset() at
> some places.
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