mik-laj opened a new pull request #7521: [AIRFLOW-6897] Simplify DagFileProcessorManager URL: https://github.com/apache/airflow/pull/7521 **Extract start_new_processes and prepare_file_path_queue** These functions are independent of each other, but as separate methods, they are easier to understand. A good methods name is the best documentation. I also changed to `_heartbeat_count` to `_no_run` because it better describes the role. This variable can increase without affecting heartbeat when DagFileProcessorManager is running in asynchronous mode.q **Move emit_metrics call** It is not related to generating file_path_queue, so it should be called by the caller. **Inline heartbeat method** This function does not make sense, because every time a full loop is performed. It only hides the logic and makes it difficult to understand the code. **Move _kill_timed_out_processors to loop** It is not related to generating the collect_results method, so it should be called by the caller. Now I have the impression that the sequence of operations is much more easy to understand because it is only found in the start method. In this PR I do not want to change the sequence of operations. It is only refactoring without functional changes. --- Issue link: WILL BE INSERTED BY [boring-cyborg](https://github.com/kaxil/boring-cyborg) Make sure to mark the boxes below before creating PR: [x] - [X] Description above provides context of the change - [X] Commit message/PR title starts with `[AIRFLOW-NNNN]`. AIRFLOW-NNNN = JIRA ID<sup>*</sup> - [X] Unit tests coverage for changes (not needed for documentation changes) - [X] Commits follow "[How to write a good git commit message](http://chris.beams.io/posts/git-commit/)" - [X] Relevant documentation is updated including usage instructions. - [X] I will engage committers as explained in [Contribution Workflow Example](https://github.com/apache/airflow/blob/master/CONTRIBUTING.rst#contribution-workflow-example). <sup>*</sup> For document-only changes commit message can start with `[AIRFLOW-XXXX]`. --- In case of fundamental code change, Airflow Improvement Proposal ([AIP](https://cwiki.apache.org/confluence/display/AIRFLOW/Airflow+Improvements+Proposals)) is needed. In case of a new dependency, check compliance with the [ASF 3rd Party License Policy](https://www.apache.org/legal/resolved.html#category-x). In case of backwards incompatible changes please leave a note in [UPDATING.md](https://github.com/apache/airflow/blob/master/UPDATING.md). Read the [Pull Request Guidelines](https://github.com/apache/airflow/blob/master/CONTRIBUTING.rst#pull-request-guidelines) for more information.
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