hadoop RefreshCallQueueProtocolClientSideTranslatorPB 源码

2022-10-20
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haddop RefreshCallQueueProtocolClientSideTranslatorPB 代码

文件路径：/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ipc/protocolPB/RefreshCallQueueProtocolClientSideTranslatorPB.java

/**
 * 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.ipc.protocolPB;

import java.io.Closeable;
import java.io.IOException;

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 org.apache.hadoop.ipc.RefreshCallQueueProtocol;
import org.apache.hadoop.ipc.proto.RefreshCallQueueProtocolProtos.RefreshCallQueueRequestProto;
import org.apache.hadoop.ipc.protocolPB.RefreshCallQueueProtocolPB;

import org.apache.hadoop.thirdparty.protobuf.RpcController;
import org.apache.hadoop.thirdparty.protobuf.ServiceException;

public class RefreshCallQueueProtocolClientSideTranslatorPB implements
    ProtocolMetaInterface, RefreshCallQueueProtocol, Closeable {

  /** RpcController is not used and hence is set to null */
  private final static RpcController NULL_CONTROLLER = null;
  private final RefreshCallQueueProtocolPB rpcProxy;
  
  private final static RefreshCallQueueRequestProto
  VOID_REFRESH_CALL_QUEUE_REQUEST =
      RefreshCallQueueRequestProto.newBuilder().build();

  public RefreshCallQueueProtocolClientSideTranslatorPB(
      RefreshCallQueueProtocolPB rpcProxy) {
    this.rpcProxy = rpcProxy;
  }

  @Override
  public void close() throws IOException {
    RPC.stopProxy(rpcProxy);
  }

  @Override
  public void refreshCallQueue() throws IOException {
    try {
      rpcProxy.refreshCallQueue(NULL_CONTROLLER,
          VOID_REFRESH_CALL_QUEUE_REQUEST);
    } catch (ServiceException se) {
      throw ProtobufHelper.getRemoteException(se);
    }
  }

  @Override
  public boolean isMethodSupported(String methodName) throws IOException {
    return RpcClientUtil.isMethodSupported(rpcProxy,
        RefreshCallQueueProtocolPB.class,
        RPC.RpcKind.RPC_PROTOCOL_BUFFER,
        RPC.getProtocolVersion(RefreshCallQueueProtocolPB.class),
        methodName);
  }
}

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