@Override
public boolean rename(final Path src, final Path dst) throws IOException {
// passing resolveLastComponet as false to catch renaming a mount point to
// itself. We need to catch this as an internal operation and fail.
InodeTree.ResolveResult<FileSystem> resSrc = fsState.resolve(getUriPath(src), false);
if (resSrc.isInternalDir()) {
throw readOnlyMountTable("rename", src);
}
InodeTree.ResolveResult<FileSystem> resDst = fsState.resolve(getUriPath(dst), false);
if (resDst.isInternalDir()) {
throw readOnlyMountTable("rename", dst);
}
/**
* // Alternate 1: renames within same file system - valid but we disallow // Alternate 2: (as
* described in next para - valid but we have disallowed it // // Note we compare the URIs. the
* URIs include the link targets. // hence we allow renames across mount links as long as the
* mount links // point to the same target. if (!resSrc.targetFileSystem.getUri().equals(
* resDst.targetFileSystem.getUri())) { throw new IOException("Renames across Mount points not
* supported"); }
*/
//
// Alternate 3 : renames ONLY within the the same mount links.
//
if (resSrc.targetFileSystem != resDst.targetFileSystem) {
throw new IOException("Renames across Mount points not supported");
}
return resSrc.targetFileSystem.rename(resSrc.remainingPath, resDst.remainingPath);
}
@Override
public BlockLocation[] getFileBlockLocations(FileStatus fs, long start, long len)
throws IOException {
final InodeTree.ResolveResult<FileSystem> res = fsState.resolve(getUriPath(fs.getPath()), true);
return res.targetFileSystem.getFileBlockLocations(
new ViewFsFileStatus(fs, res.remainingPath), start, len);
}
@Override
public Path resolvePath(final Path f) throws IOException {
final InodeTree.ResolveResult<FileSystem> res;
res = fsState.resolve(getUriPath(f), true);
if (res.isInternalDir()) {
return f;
}
return res.targetFileSystem.resolvePath(res.remainingPath);
}
@Override
public short getDefaultReplication(Path f) {
try {
InodeTree.ResolveResult<FileSystem> res = fsState.resolve(getUriPath(f), true);
return res.targetFileSystem.getDefaultReplication(res.remainingPath);
} catch (FileNotFoundException e) {
throw new NotInMountpointException(f, "getDefaultReplication");
}
}
@Override
public boolean delete(final Path f, final boolean recursive)
throws AccessControlException, FileNotFoundException, IOException {
InodeTree.ResolveResult<FileSystem> res = fsState.resolve(getUriPath(f), true);
// If internal dir or target is a mount link (ie remainingPath is Slash)
if (res.isInternalDir() || res.remainingPath == InodeTree.SlashPath) {
throw readOnlyMountTable("delete", f);
}
return res.targetFileSystem.delete(res.remainingPath, recursive);
}
@Override
public FileStatus getFileStatus(final Path f)
throws AccessControlException, FileNotFoundException, IOException {
InodeTree.ResolveResult<FileSystem> res = fsState.resolve(getUriPath(f), true);
// FileStatus#getPath is a fully qualified path relative to the root of
// target file system.
// We need to change it to viewfs URI - relative to root of mount table.
// The implementors of RawLocalFileSystem were trying to be very smart.
// They implement FileStatus#getOwener lazily -- the object
// returned is really a RawLocalFileSystem that expect the
// FileStatus#getPath to be unchanged so that it can get owner when needed.
// Hence we need to interpose a new ViewFileSystemFileStatus that
// works around.
FileStatus status = res.targetFileSystem.getFileStatus(res.remainingPath);
return new ViewFsFileStatus(status, this.makeQualified(f));
}
@Override
public FSDataOutputStream create(
final Path f,
final FsPermission permission,
final boolean overwrite,
final int bufferSize,
final short replication,
final long blockSize,
final Progressable progress)
throws IOException {
InodeTree.ResolveResult<FileSystem> res;
try {
res = fsState.resolve(getUriPath(f), false);
} catch (FileNotFoundException e) {
throw readOnlyMountTable("create", f);
}
assert (res.remainingPath != null);
return res.targetFileSystem.create(
res.remainingPath, permission, overwrite, bufferSize, replication, blockSize, progress);
}
@Override
public FSDataOutputStream createNonRecursive(
Path f,
FsPermission permission,
EnumSet<CreateFlag> flags,
int bufferSize,
short replication,
long blockSize,
Progressable progress)
throws IOException {
InodeTree.ResolveResult<FileSystem> res;
try {
res = fsState.resolve(getUriPath(f), false);
} catch (FileNotFoundException e) {
throw readOnlyMountTable("create", f);
}
assert (res.remainingPath != null);
return res.targetFileSystem.createNonRecursive(
res.remainingPath, permission, flags, bufferSize, replication, blockSize, progress);
}
@Override
public FileStatus[] listStatus(final Path f)
throws AccessControlException, FileNotFoundException, IOException {
InodeTree.ResolveResult<FileSystem> res = fsState.resolve(getUriPath(f), true);
FileStatus[] statusLst = res.targetFileSystem.listStatus(res.remainingPath);
if (!res.isInternalDir()) {
// We need to change the name in the FileStatus as described in
// {@link #getFileStatus }
ChRootedFileSystem targetFs;
targetFs = (ChRootedFileSystem) res.targetFileSystem;
int i = 0;
for (FileStatus status : statusLst) {
String suffix = targetFs.stripOutRoot(status.getPath());
statusLst[i++] =
new ViewFsFileStatus(
status,
this.makeQualified(suffix.length() == 0 ? f : new Path(res.resolvedPath, suffix)));
}
}
return statusLst;
}
@Override
public void setTimes(final Path f, final long mtime, final long atime)
throws AccessControlException, FileNotFoundException, IOException {
InodeTree.ResolveResult<FileSystem> res = fsState.resolve(getUriPath(f), true);
res.targetFileSystem.setTimes(res.remainingPath, mtime, atime);
}
@Override
public boolean mkdirs(final Path dir, final FsPermission permission) throws IOException {
InodeTree.ResolveResult<FileSystem> res = fsState.resolve(getUriPath(dir), false);
return res.targetFileSystem.mkdirs(res.remainingPath, permission);
}
@Override
public void setPermission(final Path f, final FsPermission permission)
throws AccessControlException, FileNotFoundException, IOException {
InodeTree.ResolveResult<FileSystem> res = fsState.resolve(getUriPath(f), true);
res.targetFileSystem.setPermission(res.remainingPath, permission);
}
@Override
public boolean setReplication(final Path f, final short replication)
throws AccessControlException, FileNotFoundException, IOException {
InodeTree.ResolveResult<FileSystem> res = fsState.resolve(getUriPath(f), true);
return res.targetFileSystem.setReplication(res.remainingPath, replication);
}
@Override
public void setOwner(final Path f, final String username, final String groupname)
throws AccessControlException, FileNotFoundException, IOException {
InodeTree.ResolveResult<FileSystem> res = fsState.resolve(getUriPath(f), true);
res.targetFileSystem.setOwner(res.remainingPath, username, groupname);
}
@Override
public FSDataOutputStream append(final Path f, final int bufferSize, final Progressable progress)
throws IOException {
InodeTree.ResolveResult<FileSystem> res = fsState.resolve(getUriPath(f), true);
return res.targetFileSystem.append(res.remainingPath, bufferSize, progress);
}
@Override
public FSDataInputStream open(final Path f, final int bufferSize)
throws AccessControlException, FileNotFoundException, IOException {
InodeTree.ResolveResult<FileSystem> res = fsState.resolve(getUriPath(f), true);
return res.targetFileSystem.open(res.remainingPath, bufferSize);
}
@Override
public FileChecksum getFileChecksum(final Path f)
throws AccessControlException, FileNotFoundException, IOException {
InodeTree.ResolveResult<FileSystem> res = fsState.resolve(getUriPath(f), true);
return res.targetFileSystem.getFileChecksum(res.remainingPath);
}
@Override
public FsServerDefaults getServerDefaults(Path f) throws IOException {
InodeTree.ResolveResult<FileSystem> res = fsState.resolve(getUriPath(f), true);
return res.targetFileSystem.getServerDefaults(res.remainingPath);
}
@Override
public ContentSummary getContentSummary(Path f) throws IOException {
InodeTree.ResolveResult<FileSystem> res = fsState.resolve(getUriPath(f), true);
return res.targetFileSystem.getContentSummary(res.remainingPath);
}
public Path getTrashCanLocation(final Path f) throws FileNotFoundException {
final InodeTree.ResolveResult<FileSystem> res = fsState.resolve(getUriPath(f), true);
return res.isInternalDir() ? null : res.targetFileSystem.getHomeDirectory();
}
