ajfabbri commented on a change in pull request #568: HADOOP-15691 Add
PathCapabilities to FS and FC to complement StreamCapabilities
URL: https://github.com/apache/hadoop/pull/568#discussion_r326421016
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File path:
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/AbstractFileSystem.java
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@@ -1371,4 +1373,16 @@ public boolean equals(Object other) {
new CompletableFuture<>(), () -> open(path, bufferSize));
}
+ public boolean hasPathCapability(final Path path,
+ final String capability)
Review comment:
Been talking about something like this for years, thanks for working on
this. Taking a `Path` instead of a `scheme` seems right: it is flexible
(general design, specific implementation applies here). Was curious about
examples where different paths in the same FS would have different
capabilities. I suppose S3A could have different buckets in different regions
or with different configurations (e.g. permissions, or S3Guard
enabled/disabled, etc.) Just noticed you mentioned ViewFS as well. Another
good case for per-path capabilities.
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