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https://issues.apache.org/jira/browse/HADOOP-12311?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14679309#comment-14679309
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Chris Nauroth commented on HADOOP-12311:
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Hi [[email protected]]. It's an interesting idea, and thank you for filing
the issue. I'm linking this to HDFS-8250 as a pre-requisite. HDFS-8250
proposes a {{java.nio.file.FileSystem}} binding to Hadoop's
{{org.apache.hadoop.fs.FileSystem}}. This much could be done within the 2.x
line, since it only would require Java 7. Stream support was added in Java 8,
and that can target trunk/Hadoop 3.
> Implement stream-based Filesystem API
> -------------------------------------
>
> Key: HADOOP-12311
> URL: https://issues.apache.org/jira/browse/HADOOP-12311
> Project: Hadoop Common
> Issue Type: New Feature
> Components: fs
> Reporter: Victor Malov
> Priority: Minor
>
> After looking at Filesystem API, I couldn't find Stream-based API, which will
> be work well with Java lambda-functions and be able chain calls.
> As Hadoop 3.0 is going to support JDK 8, I propose implement general
> stream-based Filesystem API similar to as implemented in Java SE 8:
> static Stream<String> lines(Path path, Charset cs)
> This probably will looks similar to this:
> try (Stream<Path> stream = Files.list(Paths.get(""))) {
> String joined = stream
> . map(String::valueOf)
> .filter(path -> !path.startsWith("."))
> .sorted()
> .collect(Collectors.joining("; "));
> System.out.println("List: " + joined);
> }
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