Hao Zhang created HELIX-708:
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Summary: Prepare controller stages for async execution
Key: HELIX-708
URL: https://issues.apache.org/jira/browse/HELIX-708
Project: Apache Helix
Issue Type: Task
Reporter: Hao Zhang
There are a couple of stages in helix controller that can be executed
asynchronously, but each execution should be done in order. Currently for helix
controller, we have a thread pool for un-ordered execution, but we also need
one for ordered execution.
In this ticket should do the following:
1. Create a pool of configurable workers using DedupEventProcessor
2. Create AbstractAsyncBaseStage for those stages that can be executed
asynchronously to share common code
AC:
Create AbstractAsyncBaseStage and DedupFIFOWorkerPool for async execution, pass
all tests.
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