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https://issues.apache.org/jira/browse/CASSANDRA-16924?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17416858#comment-17416858
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Sam Tunnicliffe edited comment on CASSANDRA-16924 at 9/20/21, 12:28 PM:
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Branch: https://github.com/beobal/cassandra/tree/16924-trunk 
PR: https://github.com/beobal/cassandra/pull/4



was (Author: beobal):
[16924-trunk|https://github.com/beobal/cassandra/tree/16924-trunk]

> Blocking Concurrency Primitives
> -------------------------------
>
>                 Key: CASSANDRA-16924
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-16924
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Legacy/Core
>            Reporter: Benedict Elliott Smith
>            Assignee: Benedict Elliott Smith
>            Priority: Normal
>
> To support CEP-10 it is necessary to support alternative implementations of 
> the blocking concurrency primitives we use on the project. At the same time, 
> the project is very inconsistent in its usage of these APIs, so this work 
> includes a number of improvements to the coherency of the codebase. 
> This ticket introduces new abstractions and standardises old ones, migrating 
> all blocking concurrency operations besides Futures returned by Executors to 
> these new APIs. This includes a migration of SimpleCondition to a new 
> Conditioninterface, new CountDownLatch and Semaphore interfaces, and new 
> static factory methods for creating these objects (as well as WaitQueue) that 
> can be intercepted by byte weaving. Additionally the internal Netty Future 
> implementation is improved to support more general use (though this is only 
> fully realised in a later ticket), OpOrder is improved to more easily support 
> mocking WaitQueue.
> Finally we standardise the propagation of InterruptedExecption, with the new 
> UncheckedInterruptedException, so that simulations may be terminated cleanly.



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