org.apache.hadoop.hdfs.protocolPB.InterDatanodeProtocolTranslatorPB Maven / Gradle / Ivy
/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.hdfs.protocolPB;
import java.io.Closeable;
import java.io.IOException;
import java.net.InetSocketAddress;
import javax.net.SocketFactory;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hdfs.protocol.ExtendedBlock;
import org.apache.hadoop.hdfs.protocol.proto.HdfsProtos.BlockProto;
import org.apache.hadoop.hdfs.protocol.proto.InterDatanodeProtocolProtos.InitReplicaRecoveryRequestProto;
import org.apache.hadoop.hdfs.protocol.proto.InterDatanodeProtocolProtos.InitReplicaRecoveryResponseProto;
import org.apache.hadoop.hdfs.protocol.proto.InterDatanodeProtocolProtos.UpdateReplicaUnderRecoveryRequestProto;
import org.apache.hadoop.hdfs.server.protocol.BlockRecoveryCommand.RecoveringBlock;
import org.apache.hadoop.hdfs.server.protocol.InterDatanodeProtocol;
import org.apache.hadoop.hdfs.server.protocol.ReplicaRecoveryInfo;
import org.apache.hadoop.ipc.ProtobufHelper;
import org.apache.hadoop.ipc.ProtobufRpcEngine2;
import org.apache.hadoop.ipc.ProtocolMetaInterface;
import org.apache.hadoop.ipc.RPC;
import org.apache.hadoop.ipc.RpcClientUtil;
import org.apache.hadoop.security.UserGroupInformation;
import org.apache.hadoop.thirdparty.protobuf.RpcController;
import org.apache.hadoop.thirdparty.protobuf.ServiceException;
/**
* This class is the client side translator to translate the requests made on
* {@link InterDatanodeProtocol} interfaces to the RPC server implementing
* {@link InterDatanodeProtocolPB}.
*/
@InterfaceAudience.Private
@InterfaceStability.Stable
public class InterDatanodeProtocolTranslatorPB implements
ProtocolMetaInterface, InterDatanodeProtocol, Closeable {
/** RpcController is not used and hence is set to null */
private final static RpcController NULL_CONTROLLER = null;
final private InterDatanodeProtocolPB rpcProxy;
public InterDatanodeProtocolTranslatorPB(InetSocketAddress addr,
UserGroupInformation ugi, Configuration conf, SocketFactory factory,
int socketTimeout)
throws IOException {
RPC.setProtocolEngine(conf, InterDatanodeProtocolPB.class,
ProtobufRpcEngine2.class);
rpcProxy = RPC.getProxy(InterDatanodeProtocolPB.class,
RPC.getProtocolVersion(InterDatanodeProtocolPB.class), addr, ugi, conf,
factory, socketTimeout);
}
@Override
public void close() {
RPC.stopProxy(rpcProxy);
}
@Override
public ReplicaRecoveryInfo initReplicaRecovery(RecoveringBlock rBlock)
throws IOException {
InitReplicaRecoveryRequestProto req = InitReplicaRecoveryRequestProto
.newBuilder().setBlock(PBHelper.convert(rBlock)).build();
InitReplicaRecoveryResponseProto resp;
try {
resp = rpcProxy.initReplicaRecovery(NULL_CONTROLLER, req);
} catch (ServiceException e) {
throw ProtobufHelper.getRemoteException(e);
}
if (!resp.getReplicaFound()) {
// No replica found on the remote node.
return null;
} else {
if (!resp.hasBlock() || !resp.hasState()) {
throw new IOException("Replica was found but missing fields. " +
"Req: " + req + "\n" +
"Resp: " + resp);
}
}
BlockProto b = resp.getBlock();
return new ReplicaRecoveryInfo(b.getBlockId(), b.getNumBytes(),
b.getGenStamp(), PBHelper.convert(resp.getState()));
}
@Override
public String updateReplicaUnderRecovery(ExtendedBlock oldBlock,
long recoveryId, long newBlockId, long newLength) throws IOException {
UpdateReplicaUnderRecoveryRequestProto req =
UpdateReplicaUnderRecoveryRequestProto.newBuilder()
.setBlock(PBHelperClient.convert(oldBlock))
.setNewLength(newLength).setNewBlockId(newBlockId)
.setRecoveryId(recoveryId).build();
try {
return rpcProxy.updateReplicaUnderRecovery(NULL_CONTROLLER, req
).getStorageUuid();
} catch (ServiceException e) {
throw ProtobufHelper.getRemoteException(e);
}
}
@Override
public boolean isMethodSupported(String methodName) throws IOException {
return RpcClientUtil.isMethodSupported(rpcProxy,
InterDatanodeProtocolPB.class, RPC.RpcKind.RPC_PROTOCOL_BUFFER,
RPC.getProtocolVersion(InterDatanodeProtocolPB.class), methodName);
}
}