Add a SelectorProvider that reuses custom provider implementations. #19186
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Tasks:
Changes:
The SelectorProvider fixes an issue where the static method
Selector.open()would create a system-wide default SelectorProvider object whereas in our case we need a custom SelectorProvider.This implementation utilizes ThreadLocal so that each thread can reuse the configured provider within its' own context.
The Selector code is updated to use our custom SelectorProvider from
org.apache.kafka.common.network.