Steve Loughran created HADOOP-15691:
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Summary: Add PathCapabilities to FS and FC to complement
StreamCapabilities
Key: HADOOP-15691
URL: https://issues.apache.org/jira/browse/HADOOP-15691
Project: Hadoop Common
Issue Type: New Feature
Reporter: Steve Loughran
Assignee: Steve Loughran
Add a {{PathCapabilities}} interface to both FileSystem and FileContext to
declare the capabilities under the path of an FS
This is needed for
* HADOOP-15407: declare that a dest FS supports permissions
* object stores to declare that they offer PUT-in-place alongside (slow-rename)
* Anything else where the implementation semantics of an FS is so different
caller apps would benefit from probing for the underlying semantics
I know, we want all filesystem to work *exactly* the same. But it doesn't hold,
especially for object stores —and to efficiently use them, callers need to be
able to ask for specific features.
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