StefanRRichter opened a new pull request #8692: [FLINK-12804] Introduce mailbox-based ExecutorService URL: https://github.com/apache/flink/pull/8692 ## What is the purpose of the change This PR introduced an {{ExecutorService}} frontend to the mailbox that can be used by client code. For this purpose, the mailbox was also extended with open->quiesce -> close lifecycle methods. ## Brief change log - Intoduce {{TaskMailboxExecutorService}}, an {{ExecutorService}} with additional non-blocking alternative to {{execute}} and a {{yield()}} functionality. - Enhanced {{Mailbox}} with lifecycle methods. - Improvements to the mailbox usage in {{StreamTask}} ## Verifying this change Introduced {{TaskMailboxExecutorServiceImplTest}} and extended {{MailboxImplTest}}. ## Does this pull request potentially affect one of the following parts: - Dependencies (does it add or upgrade a dependency): (no) - The public API, i.e., is any changed class annotated with `@Public(Evolving)`: (no) - The serializers: (no) - The runtime per-record code paths (performance sensitive): (yes) - Anything that affects deployment or recovery: JobManager (and its components), Checkpointing, Yarn/Mesos, ZooKeeper: (no) - The S3 file system connector: (no) ## Documentation - Does this pull request introduce a new feature? (no) - If yes, how is the feature documented? (not applicable)
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