001/**
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018
019package org.apache.hadoop.ipc.protocolPB;
020
021import java.io.Closeable;
022import java.io.IOException;
023
024import org.apache.hadoop.ipc.ProtobufHelper;
025import org.apache.hadoop.ipc.ProtocolMetaInterface;
026import org.apache.hadoop.ipc.RPC;
027import org.apache.hadoop.ipc.RpcClientUtil;
028import org.apache.hadoop.ipc.RefreshCallQueueProtocol;
029import org.apache.hadoop.ipc.proto.RefreshCallQueueProtocolProtos.RefreshCallQueueRequestProto;
030import org.apache.hadoop.ipc.protocolPB.RefreshCallQueueProtocolPB;
031
032import com.google.protobuf.RpcController;
033import com.google.protobuf.ServiceException;
034
035public class RefreshCallQueueProtocolClientSideTranslatorPB implements
036    ProtocolMetaInterface, RefreshCallQueueProtocol, Closeable {
037
038  /** RpcController is not used and hence is set to null */
039  private final static RpcController NULL_CONTROLLER = null;
040  private final RefreshCallQueueProtocolPB rpcProxy;
041  
042  private final static RefreshCallQueueRequestProto
043  VOID_REFRESH_CALL_QUEUE_REQUEST =
044      RefreshCallQueueRequestProto.newBuilder().build();
045
046  public RefreshCallQueueProtocolClientSideTranslatorPB(
047      RefreshCallQueueProtocolPB rpcProxy) {
048    this.rpcProxy = rpcProxy;
049  }
050
051  @Override
052  public void close() throws IOException {
053    RPC.stopProxy(rpcProxy);
054  }
055
056  @Override
057  public void refreshCallQueue() throws IOException {
058    try {
059      rpcProxy.refreshCallQueue(NULL_CONTROLLER,
060          VOID_REFRESH_CALL_QUEUE_REQUEST);
061    } catch (ServiceException se) {
062      throw ProtobufHelper.getRemoteException(se);
063    }
064  }
065
066  @Override
067  public boolean isMethodSupported(String methodName) throws IOException {
068    return RpcClientUtil.isMethodSupported(rpcProxy,
069        RefreshCallQueueProtocolPB.class,
070        RPC.RpcKind.RPC_PROTOCOL_BUFFER,
071        RPC.getProtocolVersion(RefreshCallQueueProtocolPB.class),
072        methodName);
073  }
074}