public SnapshotableArrayList(SnapshotManager manager, ArrayList<T> initial) {
if (initial != null) {
snapshot = new ArrayList<T>(initial);
} else {
snapshot = new ArrayList<T>();
}
live = Collections.synchronizedList(new ArrayList<T>(snapshot));
manager.add(this);
}
/**
* Load the snapshots section from fsimage. Also convert snapshottable directories into {@link
* INodeDirectorySnapshottable}.
*/
public void loadSnapshotSection(InputStream in) throws IOException {
SnapshotManager sm = fsn.getSnapshotManager();
SnapshotSection section = SnapshotSection.parseDelimitedFrom(in);
int snum = section.getNumSnapshots();
sm.setNumSnapshots(snum);
sm.setSnapshotCounter(section.getSnapshotCounter());
for (long sdirId : section.getSnapshottableDirList()) {
INodeDirectory dir = fsDir.getInode(sdirId).asDirectory();
final INodeDirectorySnapshottable sdir;
if (!dir.isSnapshottable()) {
sdir = new INodeDirectorySnapshottable(dir);
fsDir.addToInodeMap(sdir);
} else {
// dir is root, and admin set root to snapshottable before
sdir = (INodeDirectorySnapshottable) dir;
sdir.setSnapshotQuota(INodeDirectorySnapshottable.SNAPSHOT_LIMIT);
}
sm.addSnapshottable(sdir);
}
loadSnapshots(in, snum);
}
/** save all the snapshottable directories and snapshots to fsimage */
public void serializeSnapshotSection(OutputStream out) throws IOException {
SnapshotManager sm = fsn.getSnapshotManager();
SnapshotSection.Builder b =
SnapshotSection.newBuilder()
.setSnapshotCounter(sm.getSnapshotCounter())
.setNumSnapshots(sm.getNumSnapshots());
INodeDirectorySnapshottable[] snapshottables = sm.getSnapshottableDirs();
for (INodeDirectorySnapshottable sdir : snapshottables) {
b.addSnapshottableDir(sdir.getId());
}
b.build().writeDelimitedTo(out);
int i = 0;
for (INodeDirectorySnapshottable sdir : snapshottables) {
for (Snapshot s : sdir.getSnapshotsByNames()) {
Root sroot = s.getRoot();
SnapshotSection.Snapshot.Builder sb =
SnapshotSection.Snapshot.newBuilder().setSnapshotId(s.getId());
INodeSection.INodeDirectory.Builder db =
buildINodeDirectory(sroot, parent.getSaverContext());
INodeSection.INode r =
INodeSection.INode.newBuilder()
.setId(sroot.getId())
.setType(INodeSection.INode.Type.DIRECTORY)
.setName(ByteString.copyFrom(sroot.getLocalNameBytes()))
.setDirectory(db)
.build();
sb.setRoot(r).build().writeDelimitedTo(out);
i++;
if (i % FSImageFormatProtobuf.Saver.CHECK_CANCEL_INTERVAL == 0) {
context.checkCancelled();
}
}
}
Preconditions.checkState(i == sm.getNumSnapshots());
parent.commitSection(headers, FSImageFormatProtobuf.SectionName.SNAPSHOT);
}