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Ship it!


The code looks good, but could use some explanatory comments in the header 
files. How the channelIds are managed and some one-liners at least for what the 
methods do. returnChannelId may not be too obvious without reading the 
implementing code.

- Steve Huston


On Oct. 24, 2012, 7:55 p.m., Chug Rolke wrote:
> 
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> (Updated Oct. 24, 2012, 7:55 p.m.)
> 
> 
> Review request for qpid.
> 
> 
> Description
> -------
> 
> Previously Link channel numbers are allocated by a simple incrementer. When 
> the counter wrapped then old channel numbers were blindly reused.
> 
> Now a pool of available channel numbers is kept in a RangeSet. Each bridge 
> allocates a channel number from the pool when it is created and returns the 
> channel number to the pool when it is destroyed.
> 
> Debug level messages log the allocation and freeing of channel numbers.
> 
> An exception is thrown if the pool runs empty.
> 
> 
> This addresses bug QPID-4392.
>     https://issues.apache.org/jira/browse/QPID-4392
> 
> 
> Diffs
> -----
> 
>   trunk/qpid/cpp/src/qpid/broker/Bridge.h 1400732 
>   trunk/qpid/cpp/src/qpid/broker/Link.h 1400732 
>   trunk/qpid/cpp/src/qpid/broker/Link.cpp 1400732 
>   trunk/qpid/cpp/src/qpid/broker/LinkRegistry.cpp 1400732 
> 
> Diff: https://reviews.apache.org/r/7727/diff/
> 
> 
> Testing
> -------
> 
> A test broker is built with a pool of only 15 (vs normal 32767) channel 
> numbers. Simple tests verify that 1) old code wraps and causes failures, 2) 
> new code detects pool exhaustion, and 3) new code logs channel numbers being 
> properly reused.
> 
> Normal self tests pass.
> 
> 
> Thanks,
> 
> Chug Rolke
> 
>

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