Steve Loughran created HADOOP-16848:
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Summary: 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
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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