Examples with INodeDirectory org.apache.hadoop.hdfs.server.namenode.INodeDirectory used on opensource projects

Example 46 with INodeDirectory

use of org.apache.hadoop.hdfs.server.namenode.INodeDirectory in project hadoop by apache.

the class SnapshotManager method diff.

/**
   * Compute the difference between two snapshots of a directory, or between a
   * snapshot of the directory and its current tree.
   */
public SnapshotDiffReport diff(final INodesInPath iip, final String snapshotRootPath, final String from, final String to) throws IOException {
    // Find the source root directory path where the snapshots were taken.
    // All the check for path has been included in the valueOf method.
    final INodeDirectory snapshotRoot = getSnapshottableRoot(iip);
    if ((from == null || from.isEmpty()) && (to == null || to.isEmpty())) {
        // both fromSnapshot and toSnapshot indicate the current tree
        return new SnapshotDiffReport(snapshotRootPath, from, to, Collections.<DiffReportEntry>emptyList());
    }
    final SnapshotDiffInfo diffs = snapshotRoot.getDirectorySnapshottableFeature().computeDiff(snapshotRoot, from, to);
    return diffs != null ? diffs.generateReport() : new SnapshotDiffReport(snapshotRootPath, from, to, Collections.<DiffReportEntry>emptyList());
}