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https://issues.apache.org/jira/browse/HADOOP-16848?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18035428#comment-18035428
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ASF GitHub Bot commented on HADOOP-16848:
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steveloughran closed pull request #1839: HADOOP-16848. Refactoring: initial
layering
URL: https://github.com/apache/hadoop/pull/1839
> add initial S3A layering + async init
> -------------------------------------
>
> Key: HADOOP-16848
> URL: https://issues.apache.org/jira/browse/HADOOP-16848
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: fs/s3
> Affects Versions: 3.3.0
> Reporter: Steve Loughran
> Assignee: Steve Loughran
> Priority: Major
> Labels: pull-request-available
> Time Spent: 1.5h
> Remaining Estimate: 0h
>
> Split the S3A code into layers
> * S3AFileSystem
> * S3AStore + Impl
> * RawS3A + Impl
> S3AFS will create the others and start in order: DelegationTokens, RawS3A,
> S3AStore, Metastore
> this will involve wrapping all access of DTs, s3client, Metastore to block
> until that layer is complete, or raise an exception if instantiation of
> it/predecessor failed.
> New layers will all be subclasses of Service, split into Interface and Impl,
> so we can manage the init/start/stop lifecycle with existing code
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