> On March 13, 2015, 11:43 p.m., Guozhang Wang wrote:
> > core/src/main/scala/kafka/message/MessageWriter.scala, line 29
> > <https://reviews.apache.org/r/31742/diff/1/?file=884487#file884487line29>
> >
> >     Add a check that codec should not be NoCompression.

Why the codec should not be NoCompression? The code works with NoCompression, 
too.


> On March 13, 2015, 11:43 p.m., Guozhang Wang wrote:
> > core/src/main/scala/kafka/message/MessageWriter.scala, line 97
> > <https://reviews.apache.org/r/31742/diff/1/?file=884487#file884487line97>
> >
> >     Could we use comments in 
> >     
> >     /**
> >      *
> >      */
> >      
> >     format?

Is this comment style prohibitted? This class is for internal use with fairly 
localized usage.


> On March 13, 2015, 11:43 p.m., Guozhang Wang wrote:
> > core/src/main/scala/kafka/message/MessageWriter.scala, line 117
> > <https://reviews.apache.org/r/31742/diff/1/?file=884487#file884487line117>
> >
> >     We can just pass in the Byte here.

This is a contract of OutputStream.


> On March 13, 2015, 11:43 p.m., Guozhang Wang wrote:
> > core/src/main/scala/kafka/message/MessageWriter.scala, line 135
> > <https://reviews.apache.org/r/31742/diff/1/?file=884487#file884487line135>
> >
> >     Better group the private functions together after the public functions.

Well, I don't think it is particulary better way to organize code, but if you 
insist I can change it.
Kafka code base doesn't seem to follow that convention...


On March 13, 2015, 11:43 p.m., Yasuhiro Matsuda wrote:
> > The inheritance of MessageWriter from BufferingOutputStream is a bit 
> > confusing, since it will always use itself in the writePayload function 
> > parameter. 
> > 
> > I feel it is more clear to read the code if we just let MessageWriter 
> > contains a var of BufferingOutputStream; and instead of pass in the 
> > function logic of writing the message, we can just pass in messages and 
> > offsetCounter in the write() call which will then write the messages itself.

It is true that the current code writes only through writePayload. But I wanted 
MessageWriter to be a subclass of OutputStream to be more generic in case we 
need to write additional inforation other than messages in future.


- Yasuhiro


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On March 4, 2015, 7:43 p.m., Yasuhiro Matsuda wrote:
> 
> -----------------------------------------------------------
> This is an automatically generated e-mail. To reply, visit:
> https://reviews.apache.org/r/31742/
> -----------------------------------------------------------
> 
> (Updated March 4, 2015, 7:43 p.m.)
> 
> 
> Review request for kafka.
> 
> 
> Bugs: KAFKA-527
>     https://issues.apache.org/jira/browse/KAFKA-527
> 
> 
> Repository: kafka
> 
> 
> Description
> -------
> 
> less byte copies
> 
> 
> Diffs
> -----
> 
>   core/src/main/scala/kafka/message/ByteBufferMessageSet.scala 
> 9c694719dc9b515fb3c3ae96435a87b334044272 
>   core/src/main/scala/kafka/message/MessageWriter.scala PRE-CREATION 
>   core/src/test/scala/unit/kafka/message/MessageWriterTest.scala PRE-CREATION 
> 
> Diff: https://reviews.apache.org/r/31742/diff/
> 
> 
> Testing
> -------
> 
> 
> Thanks,
> 
> Yasuhiro Matsuda
> 
>

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