private static void finalize(
Configuration conf, JobConf jobconf, final Path destPath, String presevedAttributes)
throws IOException {
if (presevedAttributes == null) {
return;
}
EnumSet<FileAttribute> preseved = FileAttribute.parse(presevedAttributes);
if (!preseved.contains(FileAttribute.USER)
&& !preseved.contains(FileAttribute.GROUP)
&& !preseved.contains(FileAttribute.PERMISSION)) {
return;
}
FileSystem dstfs = destPath.getFileSystem(conf);
Path dstdirlist = new Path(jobconf.get(DST_DIR_LIST_LABEL));
SequenceFile.Reader in = null;
try {
in = new SequenceFile.Reader(dstdirlist.getFileSystem(jobconf), dstdirlist, jobconf);
Text dsttext = new Text();
FilePair pair = new FilePair();
for (; in.next(dsttext, pair); ) {
Path absdst = new Path(destPath, pair.output);
updatePermissions(pair.input, dstfs.getFileStatus(absdst), preseved, dstfs);
}
} finally {
checkAndClose(in);
}
}
private static void updatePermissions(
FileStatus src, FileStatus dst, EnumSet<FileAttribute> preseved, FileSystem destFileSys)
throws IOException {
String owner = null;
String group = null;
if (preseved.contains(FileAttribute.USER) && !src.getOwner().equals(dst.getOwner())) {
owner = src.getOwner();
}
if (preseved.contains(FileAttribute.GROUP) && !src.getGroup().equals(dst.getGroup())) {
group = src.getGroup();
}
if (owner != null || group != null) {
destFileSys.setOwner(dst.getPath(), owner, group);
}
if (preseved.contains(FileAttribute.PERMISSION)
&& !src.getPermission().equals(dst.getPermission())) {
destFileSys.setPermission(dst.getPath(), src.getPermission());
}
}
private FSDataOutputStream create(Path f, Reporter reporter, FileStatus srcstat)
throws IOException {
if (destFileSys.exists(f)) {
destFileSys.delete(f, false);
}
if (!preserve_status) {
return destFileSys.create(f, true, sizeBuf, reporter);
}
FsPermission permission =
preseved.contains(FileAttribute.PERMISSION) ? srcstat.getPermission() : null;
short replication =
preseved.contains(FileAttribute.REPLICATION)
? srcstat.getReplication()
: destFileSys.getDefaultReplication();
long blockSize =
preseved.contains(FileAttribute.BLOCK_SIZE)
? srcstat.getBlockSize()
: destFileSys.getDefaultBlockSize();
return destFileSys.create(f, permission, true, sizeBuf, replication, blockSize, reporter);
}
static EnumSet<FileAttribute> parse(String s) {
if (s == null || s.length() == 0) {
return EnumSet.allOf(FileAttribute.class);
}
EnumSet<FileAttribute> set = EnumSet.noneOf(FileAttribute.class);
FileAttribute[] attributes = values();
for (char c : s.toCharArray()) {
int i = 0;
for (; i < attributes.length && c != attributes[i].symbol; i++) ;
if (i < attributes.length) {
if (!set.contains(attributes[i])) {
set.add(attributes[i]);
} else {
throw new IllegalArgumentException(
"There are more than one '" + attributes[i].symbol + "' in " + s);
}
} else {
throw new IllegalArgumentException("'" + c + "' in " + s + " is undefined.");
}
}
return set;
}
static Arguments valueOf(String[] args, Configuration conf) throws IOException {
List<Path> srcs = new ArrayList<Path>();
Path dst = null;
Path log = null;
EnumSet<Options> flags = EnumSet.noneOf(Options.class);
String presevedAttributes = null;
String mapredSslConf = null;
long filelimit = Long.MAX_VALUE;
long sizelimit = Long.MAX_VALUE;
for (int idx = 0; idx < args.length; idx++) {
Options[] opt = Options.values();
int i = 0;
for (; i < opt.length && !args[idx].startsWith(opt[i].cmd); i++) ;
if (i < opt.length) {
flags.add(opt[i]);
if (opt[i] == Options.PRESERVE_STATUS) {
presevedAttributes = args[idx].substring(2);
FileAttribute.parse(presevedAttributes); // validation
} else if (opt[i] == Options.FILE_LIMIT) {
filelimit = Options.FILE_LIMIT.parseLong(args, ++idx);
} else if (opt[i] == Options.SIZE_LIMIT) {
sizelimit = Options.SIZE_LIMIT.parseLong(args, ++idx);
}
} else if ("-f".equals(args[idx])) {
if (++idx == args.length) {
throw new IllegalArgumentException("urilist_uri not specified in -f");
}
srcs.addAll(fetchFileList(conf, new Path(args[idx])));
} else if ("-log".equals(args[idx])) {
if (++idx == args.length) {
throw new IllegalArgumentException("logdir not specified in -log");
}
log = new Path(args[idx]);
} else if ("-mapredSslConf".equals(args[idx])) {
if (++idx == args.length) {
throw new IllegalArgumentException("ssl conf file not specified in -mapredSslConf");
}
mapredSslConf = args[idx];
} else if ("-m".equals(args[idx])) {
if (++idx == args.length) {
throw new IllegalArgumentException("num_maps not specified in -m");
}
try {
conf.setInt(MAX_MAPS_LABEL, Integer.valueOf(args[idx]));
} catch (NumberFormatException e) {
throw new IllegalArgumentException("Invalid argument to -m: " + args[idx]);
}
} else if ('-' == args[idx].codePointAt(0)) {
throw new IllegalArgumentException("Invalid switch " + args[idx]);
} else if (idx == args.length - 1) {
dst = new Path(args[idx]);
} else {
srcs.add(new Path(args[idx]));
}
}
// mandatory command-line parameters
if (srcs.isEmpty() || dst == null) {
throw new IllegalArgumentException("Missing " + (dst == null ? "dst path" : "src"));
}
// incompatible command-line flags
final boolean isOverwrite = flags.contains(Options.OVERWRITE);
final boolean isUpdate = flags.contains(Options.UPDATE);
final boolean isDelete = flags.contains(Options.DELETE);
if (isOverwrite && isUpdate) {
throw new IllegalArgumentException("Conflicting overwrite policies");
}
if (isDelete && !isOverwrite && !isUpdate) {
throw new IllegalArgumentException(
Options.DELETE.cmd
+ " must be specified with "
+ Options.OVERWRITE
+ " or "
+ Options.UPDATE
+ ".");
}
return new Arguments(
srcs, dst, log, flags, presevedAttributes, filelimit, sizelimit, mapredSslConf);
}