Example usage for org.apache.hadoop.hdfs DistributedFileSystem getSnapshottableDirListing

Introduction

In this page you can find the example usage for org.apache.hadoop.hdfs DistributedFileSystem getSnapshottableDirListing.

Prototype

public SnapshottableDirectoryStatus[] getSnapshottableDirListing() throws IOException 

Source Link

Usage

From source file:org.apache.falcon.extensions.mirroring.hdfsSnapshot.HdfsSnapshotMirroringExtension.java

License:Apache License

private static boolean isDirSnapshotable(DistributedFileSystem hdfs, Path path) throws FalconException {
    try {//  w  w w  .  j  a  v a2 s. co  m
        LOG.debug("HDFS Snapshot extension validating if dir {} is snapshotable.", path.toString());
        SnapshottableDirectoryStatus[] snapshotableDirs = hdfs.getSnapshottableDirListing();
        if (snapshotableDirs != null && snapshotableDirs.length > 0) {
            for (SnapshottableDirectoryStatus dir : snapshotableDirs) {
                if (dir.getFullPath().toString().equals(path.toString())) {
                    return true;
                }
            }
        }
        return false;
    } catch (IOException e) {
        LOG.error("Unable to verify if dir {} is snapshot-able. {}", path.toString(), e.getMessage());
        throw new FalconException("Unable to verify if dir " + path.toString() + " is snapshot-able", e);
    }
}

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