org.apache.hadoop.hdfs.qjournal.protocolPB.InterQJournalProtocolTranslatorPB 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.qjournal.protocolPB;
import org.apache.hadoop.thirdparty.protobuf.RpcController;
import org.apache.hadoop.thirdparty.protobuf.ServiceException;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;
import org.apache.hadoop.hdfs.qjournal.protocol.InterQJournalProtocol;
import org.apache.hadoop.hdfs.qjournal.protocol.QJournalProtocolProtos.GetEditLogManifestRequestProto;
import org.apache.hadoop.hdfs.qjournal.protocol.QJournalProtocolProtos.GetEditLogManifestResponseProto;
import org.apache.hadoop.hdfs.qjournal.protocol.QJournalProtocolProtos;
import org.apache.hadoop.ipc.ProtobufHelper;
import org.apache.hadoop.ipc.ProtocolMetaInterface;
import org.apache.hadoop.ipc.RPC;
import org.apache.hadoop.ipc.RpcClientUtil;
import java.io.Closeable;
import java.io.IOException;
/**
* This class is the client side translator to translate the requests made on
* {@link InterQJournalProtocol} interfaces to the RPC server implementing
* {@link InterQJournalProtocolPB}.
*/
@InterfaceAudience.Private
@InterfaceStability.Stable
public class InterQJournalProtocolTranslatorPB implements ProtocolMetaInterface,
InterQJournalProtocol, Closeable {
/* RpcController is not used and hence is set to null. */
private final static RpcController NULL_CONTROLLER = null;
private final InterQJournalProtocolPB rpcProxy;
public InterQJournalProtocolTranslatorPB(InterQJournalProtocolPB rpcProxy) {
this.rpcProxy = rpcProxy;
}
@Override
public void close() {
RPC.stopProxy(rpcProxy);
}
@Override
public GetEditLogManifestResponseProto getEditLogManifestFromJournal(
String jid, String nameServiceId, long sinceTxId, boolean inProgressOk)
throws IOException {
try {
GetEditLogManifestRequestProto.Builder req;
req = GetEditLogManifestRequestProto.newBuilder()
.setJid(convertJournalId(jid))
.setSinceTxId(sinceTxId)
.setInProgressOk(inProgressOk);
if (nameServiceId !=null) {
req.setNameServiceId(nameServiceId);
}
return rpcProxy.getEditLogManifestFromJournal(NULL_CONTROLLER,
req.build()
);
} catch (ServiceException e) {
throw ProtobufHelper.getRemoteException(e);
}
}
private QJournalProtocolProtos.JournalIdProto convertJournalId(String jid) {
return QJournalProtocolProtos.JournalIdProto.newBuilder()
.setIdentifier(jid)
.build();
}
@Override
public boolean isMethodSupported(String methodName) throws IOException {
return RpcClientUtil.isMethodSupported(rpcProxy,
InterQJournalProtocolPB.class, RPC.RpcKind.RPC_PROTOCOL_BUFFER,
RPC.getProtocolVersion(InterQJournalProtocolPB.class), methodName);
}
}