/**
* @param clusterKey
* @return Serialized protobuf of <code>clusterKey</code> with pb magic prefix prepended suitable
* for use as content of a this.peersZNode; i.e. the content of PEER_ID znode under
* /hbase/replication/peers/PEER_ID
*/
private static byte[] toByteArray(final String clusterKey) {
byte[] bytes =
ZooKeeperProtos.ReplicationPeer.newBuilder()
.setClusterkey(clusterKey)
.build()
.toByteArray();
return ProtobufUtil.prependPBMagic(bytes);
}
/** This acts as the ack for a completed procedure */
@Override
public void sendMemberCompleted(Subprocedure sub, byte[] data) throws IOException {
String procName = sub.getName();
LOG.debug(
"Marking procedure '" + procName + "' completed for member '" + memberName + "' in zk");
String joinPath = ZKUtil.joinZNode(zkController.getReachedBarrierNode(procName), memberName);
// ProtobufUtil.prependPBMagic does not take care of null
if (data == null) {
data = new byte[0];
}
try {
ZKUtil.createAndFailSilent(
zkController.getWatcher(), joinPath, ProtobufUtil.prependPBMagic(data));
} catch (KeeperException e) {
member.controllerConnectionFailure(
"Failed to post zk node:" + joinPath + " to join procedure barrier.", e, procName);
}
}
/**
* This should be called by the member and should write a serialized root cause exception as to
* the abort znode.
*/
@Override
public void sendMemberAborted(Subprocedure sub, ForeignException ee) {
if (sub == null) {
LOG.error("Failed due to null subprocedure", ee);
return;
}
String procName = sub.getName();
LOG.debug("Aborting procedure (" + procName + ") in zk");
String procAbortZNode = zkController.getAbortZNode(procName);
try {
String source = (ee.getSource() == null) ? memberName : ee.getSource();
byte[] errorInfo = ProtobufUtil.prependPBMagic(ForeignException.serialize(source, ee));
ZKUtil.createAndFailSilent(zkController.getWatcher(), procAbortZNode, errorInfo);
LOG.debug("Finished creating abort znode:" + procAbortZNode);
} catch (KeeperException e) {
// possible that we get this error for the procedure if we already reset the zk state, but in
// that case we should still get an error for that procedure anyways
zkController.logZKTree(zkController.getBaseZnode());
member.controllerConnectionFailure(
"Failed to post zk node:" + procAbortZNode + " to abort procedure", e, procName);
}
}
/**
* Sets the location of <code>hbase:meta</code> in ZooKeeper to the specified server address.
*
* @param zookeeper
* @param serverName
* @param replicaId
* @param state
* @throws KeeperException
*/
public static void setMetaLocation(
ZooKeeperWatcher zookeeper, ServerName serverName, int replicaId, RegionState.State state)
throws KeeperException {
LOG.info("Setting hbase:meta region location in ZooKeeper as " + serverName);
// Make the MetaRegionServer pb and then get its bytes and save this as
// the znode content.
MetaRegionServer pbrsr =
MetaRegionServer.newBuilder()
.setServer(ProtobufUtil.toServerName(serverName))
.setRpcVersion(HConstants.RPC_CURRENT_VERSION)
.setState(state.convert())
.build();
byte[] data = ProtobufUtil.prependPBMagic(pbrsr.toByteArray());
try {
ZKUtil.setData(zookeeper, zookeeper.getZNodeForReplica(replicaId), data);
} catch (KeeperException.NoNodeException nne) {
if (replicaId == HRegionInfo.DEFAULT_REPLICA_ID) {
LOG.debug("META region location doesn't exist, create it");
} else {
LOG.debug("META region location doesn't exist for replicaId " + replicaId + ", create it");
}
ZKUtil.createAndWatch(zookeeper, zookeeper.getZNodeForReplica(replicaId), data);
}
}
/**
* @return This instance serialized as protobuf w/ a magic pb prefix.
* @see #parseFrom(byte[])
*/
public byte[] toByteArray() {
byte[] bytes = convert().toByteArray();
return ProtobufUtil.prependPBMagic(bytes);
}