Jeff Klukas created BEAM-5910:
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Summary: FileSystems should retrieve lastModified time
Key: BEAM-5910
URL: https://issues.apache.org/jira/browse/BEAM-5910
Project: Beam
Issue Type: Improvement
Components: sdk-java-core
Reporter: Jeff Klukas
Assignee: Jeff Klukas
In the Java SDK, the Filesystems.match facilities are aimed at listing file
names and collect very limited additional metadata from the filesystem
(sizeBytes and isReadSeekEfficient). I propose adding a new field for
lastModified time to MatchResult.Metadata that each FileSystem would populate
when listing files.
This would be a basis for a future improvement to
FileIO.match(...).continuously(...) where we could let the user opt to poll not
just for new file names, but also for existing file names if their content has
been updated.
In the near term, the addition of lastModified to Metadata would allow users to
implement their own polling logic on top of Filesystems.match to detect and
download new files from any of the supported filesystems.
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