/**
* Parses an HRegionInfo instance from the passed in stream. Presumes the HRegionInfo was
* serialized to the stream with {@link #toDelimitedByteArray()}
*
* @param in
* @return An instance of HRegionInfo.
* @throws IOException
*/
public static HRegionInfo parseFrom(final DataInputStream in) throws IOException {
// I need to be able to move back in the stream if this is not a pb serialization so I can
// do the Writable decoding instead.
int pblen = ProtobufUtil.lengthOfPBMagic();
byte[] pbuf = new byte[pblen];
if (in.markSupported()) { // read it with mark()
in.mark(pblen);
}
int read =
in.read(pbuf); // assumption: if Writable serialization, it should be longer than pblen.
if (read != pblen) throw new IOException("read=" + read + ", wanted=" + pblen);
if (ProtobufUtil.isPBMagicPrefix(pbuf)) {
return convert(HBaseProtos.RegionInfo.parseDelimitedFrom(in));
} else {
// Presume Writables. Need to reset the stream since it didn't start w/ pb.
if (in.markSupported()) {
in.reset();
HRegionInfo hri = new HRegionInfo();
hri.readFields(in);
return hri;
} else {
// we cannot use BufferedInputStream, it consumes more than we read from the underlying IS
ByteArrayInputStream bais = new ByteArrayInputStream(pbuf);
SequenceInputStream sis = new SequenceInputStream(bais, in); // concatenate input streams
HRegionInfo hri = new HRegionInfo();
hri.readFields(new DataInputStream(sis));
return hri;
}
}
}
/**
* Populate this instance with what we find on the passed in <code>in</code> stream. Can
* deserialize protobuf of old Writables format.
*
* @param in
* @throws IOException
* @see #write(DataOutputStream)
*/
void read(final DataInputStream in) throws IOException {
// This code is tested over in TestHFileReaderV1 where we read an old hfile w/ this new code.
int pblen = ProtobufUtil.lengthOfPBMagic();
byte[] pbuf = new byte[pblen];
if (in.markSupported()) in.mark(pblen);
int read = in.read(pbuf);
if (read != pblen) throw new IOException("read=" + read + ", wanted=" + pblen);
if (ProtobufUtil.isPBMagicPrefix(pbuf)) {
parsePB(HFileProtos.FileInfoProto.parseDelimitedFrom(in));
} else {
if (in.markSupported()) {
in.reset();
parseWritable(in);
} else {
// We cannot use BufferedInputStream, it consumes more than we read from the underlying IS
ByteArrayInputStream bais = new ByteArrayInputStream(pbuf);
SequenceInputStream sis = new SequenceInputStream(bais, in); // Concatenate input streams
// TODO: Am I leaking anything here wrapping the passed in stream? We are not calling
// close on the wrapped
// streams but they should be let go after we leave this context? I see that we keep a
// reference to the
// passed in inputstream but since we no longer have a reference to this after we leave,
// we should be ok.
parseWritable(new DataInputStream(sis));
}
}
}
/**
* Kick off a new sub-procedure on the listener with the data stored in the passed znode.
*
* <p>Will attempt to create the same procedure multiple times if an procedure znode with the same
* name is created. It is left up the coordinator to ensure this doesn't occur.
*
* @param path full path to the znode for the procedure to start
*/
private synchronized void startNewSubprocedure(String path) {
LOG.debug("Found procedure znode: " + path);
String opName = ZKUtil.getNodeName(path);
// start watching for an abort notification for the procedure
String abortZNode = zkController.getAbortZNode(opName);
try {
if (ZKUtil.watchAndCheckExists(zkController.getWatcher(), abortZNode)) {
LOG.debug("Not starting:" + opName + " because we already have an abort notification.");
return;
}
} catch (KeeperException e) {
member.controllerConnectionFailure(
"Failed to get the abort znode (" + abortZNode + ") for procedure :" + opName, e, opName);
return;
}
// get the data for the procedure
Subprocedure subproc = null;
try {
byte[] data = ZKUtil.getData(zkController.getWatcher(), path);
if (!ProtobufUtil.isPBMagicPrefix(data)) {
String msg =
"Data in for starting procuedure "
+ opName
+ " is illegally formatted (no pb magic). "
+ "Killing the procedure: "
+ Bytes.toString(data);
LOG.error(msg);
throw new IllegalArgumentException(msg);
}
LOG.debug("start proc data length is " + data.length);
data = Arrays.copyOfRange(data, ProtobufUtil.lengthOfPBMagic(), data.length);
LOG.debug("Found data for znode:" + path);
subproc = member.createSubprocedure(opName, data);
member.submitSubprocedure(subproc);
} catch (IllegalArgumentException iae) {
LOG.error("Illegal argument exception", iae);
sendMemberAborted(subproc, new ForeignException(getMemberName(), iae));
} catch (IllegalStateException ise) {
LOG.error("Illegal state exception ", ise);
sendMemberAborted(subproc, new ForeignException(getMemberName(), ise));
} catch (KeeperException e) {
member.controllerConnectionFailure(
"Failed to get data for new procedure:" + opName, e, opName);
} catch (InterruptedException e) {
member.controllerConnectionFailure(
"Failed to get data for new procedure:" + opName, e, opName);
Thread.currentThread().interrupt();
}
}
/**
* Pass along the found abort notification to the listener
*
* @param abortZNode full znode path to the failed procedure information
*/
protected void abort(String abortZNode) {
LOG.debug("Aborting procedure member for znode " + abortZNode);
String opName = ZKUtil.getNodeName(abortZNode);
try {
byte[] data = ZKUtil.getData(zkController.getWatcher(), abortZNode);
// figure out the data we need to pass
ForeignException ee;
try {
if (data == null || data.length == 0) {
// ignore
return;
} else if (!ProtobufUtil.isPBMagicPrefix(data)) {
String msg =
"Illegally formatted data in abort node for proc "
+ opName
+ ". Killing the procedure.";
LOG.error(msg);
// we got a remote exception, but we can't describe it so just return exn from here
ee = new ForeignException(getMemberName(), new IllegalArgumentException(msg));
} else {
data = Arrays.copyOfRange(data, ProtobufUtil.lengthOfPBMagic(), data.length);
ee = ForeignException.deserialize(data);
}
} catch (InvalidProtocolBufferException e) {
LOG.warn(
"Got an error notification for op:"
+ opName
+ " but we can't read the information. Killing the procedure.");
// we got a remote exception, but we can't describe it so just return exn from here
ee = new ForeignException(getMemberName(), e);
}
this.member.receiveAbortProcedure(opName, ee);
} catch (KeeperException e) {
member.controllerConnectionFailure(
"Failed to get data for abort znode:" + abortZNode + zkController.getAbortZnode(),
e,
opName);
} catch (InterruptedException e) {
LOG.warn("abort already in progress", e);
Thread.currentThread().interrupt();
}
}
/**
* @param bytes Content of a peer znode.
* @return ClusterKey parsed from the passed bytes.
* @throws DeserializationException
*/
private static String parsePeerFrom(final byte[] bytes) throws DeserializationException {
if (ProtobufUtil.isPBMagicPrefix(bytes)) {
int pblen = ProtobufUtil.lengthOfPBMagic();
ZooKeeperProtos.ReplicationPeer.Builder builder =
ZooKeeperProtos.ReplicationPeer.newBuilder();
ZooKeeperProtos.ReplicationPeer peer;
try {
peer = builder.mergeFrom(bytes, pblen, bytes.length - pblen).build();
} catch (InvalidProtocolBufferException e) {
throw new DeserializationException(e);
}
return peer.getClusterkey();
} else {
if (bytes.length > 0) {
return Bytes.toString(bytes);
}
return "";
}
}
/**
* @param bytes A pb RegionInfo serialized with a pb magic prefix.
* @param offset starting point in the byte array
* @param len length to read on the byte array
* @return A deserialized {@link HRegionInfo}
* @throws DeserializationException
* @see #toByteArray()
*/
public static HRegionInfo parseFrom(final byte[] bytes, int offset, int len)
throws DeserializationException {
if (ProtobufUtil.isPBMagicPrefix(bytes, offset, len)) {
int pblen = ProtobufUtil.lengthOfPBMagic();
try {
HBaseProtos.RegionInfo ri =
HBaseProtos.RegionInfo.newBuilder()
.mergeFrom(bytes, pblen + offset, len - pblen)
.build();
return convert(ri);
} catch (InvalidProtocolBufferException e) {
throw new DeserializationException(e);
}
} else {
try {
HRegionInfo hri = new HRegionInfo();
hri.readFields(bytes, offset, len);
return hri;
} catch (IOException e) {
throw new DeserializationException(e);
}
}
}
/**
* Load the meta region state from the meta server ZNode.
*
* @param zkw
* @param replicaId
* @return regionstate
* @throws KeeperException
*/
public static RegionState getMetaRegionState(ZooKeeperWatcher zkw, int replicaId)
throws KeeperException {
RegionState.State state = RegionState.State.OPEN;
ServerName serverName = null;
try {
byte[] data = ZKUtil.getData(zkw, zkw.getZNodeForReplica(replicaId));
if (data != null && data.length > 0 && ProtobufUtil.isPBMagicPrefix(data)) {
try {
int prefixLen = ProtobufUtil.lengthOfPBMagic();
ZooKeeperProtos.MetaRegionServer rl =
ZooKeeperProtos.MetaRegionServer.PARSER.parseFrom(
data, prefixLen, data.length - prefixLen);
if (rl.hasState()) {
state = RegionState.State.convert(rl.getState());
}
HBaseProtos.ServerName sn = rl.getServer();
serverName = ServerName.valueOf(sn.getHostName(), sn.getPort(), sn.getStartCode());
} catch (InvalidProtocolBufferException e) {
throw new DeserializationException("Unable to parse meta region location");
}
} else {
// old style of meta region location?
serverName = ServerName.parseFrom(data);
}
} catch (DeserializationException e) {
throw ZKUtil.convert(e);
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
}
if (serverName == null) {
state = RegionState.State.OFFLINE;
}
return new RegionState(
RegionReplicaUtil.getRegionInfoForReplica(HRegionInfo.FIRST_META_REGIONINFO, replicaId),
state,
serverName);
}