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

Example 1 with SnapshotAndINode

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

the class DirectorySnapshottableFeature method dumpTreeRecursively.

@VisibleForTesting
public void dumpTreeRecursively(INodeDirectory snapshotRoot, PrintWriter out, StringBuilder prefix, int snapshot) {
    if (snapshot == Snapshot.CURRENT_STATE_ID) {
        out.println();
        out.print(prefix);
        out.print("Snapshot of ");
        final String name = snapshotRoot.getLocalName();
        out.print(name.isEmpty() ? "/" : name);
        out.print(": quota=");
        out.print(getSnapshotQuota());
        int n = 0;
        for (DirectoryDiff diff : getDiffs()) {
            if (diff.isSnapshotRoot()) {
                n++;
            }
        }
        Preconditions.checkState(n == snapshotsByNames.size(), "#n=" + n + ", snapshotsByNames.size()=" + snapshotsByNames.size());
        out.print(", #snapshot=");
        out.println(n);
        INodeDirectory.dumpTreeRecursively(out, prefix, new Iterable<SnapshotAndINode>() {

            @Override
            public Iterator<SnapshotAndINode> iterator() {
                return new Iterator<SnapshotAndINode>() {

                    final Iterator<DirectoryDiff> i = getDiffs().iterator();

                    private DirectoryDiff next = findNext();

                    private DirectoryDiff findNext() {
                        for (; i.hasNext(); ) {
                            final DirectoryDiff diff = i.next();
                            if (diff.isSnapshotRoot()) {
                                return diff;
                            }
                        }
                        return null;
                    }

                    @Override
                    public boolean hasNext() {
                        return next != null;
                    }

                    @Override
                    public SnapshotAndINode next() {
                        final SnapshotAndINode pair = new SnapshotAndINode(next.getSnapshotId(), getSnapshotById(next.getSnapshotId()).getRoot());
                        next = findNext();
                        return pair;
                    }

                    @Override
                    public void remove() {
                        throw new UnsupportedOperationException();
                    }
                };
            }
        });
    }
}