Benedict Elliott Smith created CASSANDRA-16924:
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Summary: Blocking Concurrency Primitives
Key: CASSANDRA-16924
URL: https://issues.apache.org/jira/browse/CASSANDRA-16924
Project: Cassandra
Issue Type: Improvement
Reporter: Benedict Elliott Smith
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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