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About duplicating the compression logic, one way would be:

1. Add the following functions in ByteBufferMessageSet as:

fill(buffer: ByteBuffer, compressionCodec: CompressionCodec, messages: 
MessageAndOffset*): Int

2. Change ByteBufferMessageSet.create() as:

create(offsetCounter: AtomicLong, compressionCodec: CompressionCodec, messages: 
Message*): ByteBuffer = {

  // 1. pair messages to MessageAndOffset with offsetCounter
  // 2. create the buffer as 
ByteBuffer.allocate(MessageSet.messageSetSize(messages))
  // 3. call fill()
}


core/src/main/scala/kafka/log/LogCleaner.scala
<https://reviews.apache.org/r/34397/#comment135612>

    I think the coding style convention is
    
    if {
    
    } else {
    
    }



core/src/main/scala/kafka/message/ByteBufferMessageSet.scala
<https://reviews.apache.org/r/34397/#comment135613>

    Do we need to modify this comment as well?


- Guozhang Wang


On May 19, 2015, 7:54 a.m., Joel Koshy wrote:
> 
> -----------------------------------------------------------
> This is an automatically generated e-mail. To reply, visit:
> https://reviews.apache.org/r/34397/
> -----------------------------------------------------------
> 
> (Updated May 19, 2015, 7:54 a.m.)
> 
> 
> Review request for kafka.
> 
> 
> Bugs: KAFKA-1374
>     https://issues.apache.org/jira/browse/KAFKA-1374
> 
> 
> Repository: kafka
> 
> 
> Description
> -------
> 
> Rebased patch; incorporate edits and further changes from Manikumar
> 
> 
> Diffs
> -----
> 
>   core/src/main/scala/kafka/log/LogCleaner.scala 
> abea8b251895a5cc0788c6e25b112a2935a3f631 
>   core/src/main/scala/kafka/message/ByteBufferMessageSet.scala 
> 9dfe914991aaf82162e5e300c587c794555d5fd0 
>   core/src/test/scala/kafka/tools/TestLogCleaning.scala 
> 844589427cb9337acd89a5239a98b811ee58118e 
>   core/src/test/scala/unit/kafka/log/LogCleanerIntegrationTest.scala 
> 3b5aa9dc3b7ac5893c1d281ae1326be0e9ed8aad 
>   core/src/test/scala/unit/kafka/log/LogTest.scala 
> 76d3bfd378f32fd2b216b3ebdec86e2070491924 
> 
> Diff: https://reviews.apache.org/r/34397/diff/
> 
> 
> Testing
> -------
> 
> 
> Thanks,
> 
> Joel Koshy
> 
>

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