hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/protocolPB/RefreshAuthorizationPolicyProtocolServerSideTranslatorPB.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.hdfs.protocolPB;

import java.io.IOException;

import org.apache.hadoop.hdfs.protocol.proto.RefreshAuthorizationPolicyProtocolProtos.RefreshServiceAclRequestProto;
import org.apache.hadoop.hdfs.protocol.proto.RefreshAuthorizationPolicyProtocolProtos.RefreshServiceAclResponseProto;
import org.apache.hadoop.hdfs.protocolR23Compatible.ProtocolSignatureWritable;
import org.apache.hadoop.ipc.ProtocolSignature;
import org.apache.hadoop.ipc.RPC;
import org.apache.hadoop.security.authorize.RefreshAuthorizationPolicyProtocol;

import com.google.protobuf.RpcController;
import com.google.protobuf.ServiceException;

public class RefreshAuthorizationPolicyProtocolServerSideTranslatorPB implements
    RefreshAuthorizationPolicyProtocolPB {

  private final RefreshAuthorizationPolicyProtocol impl;

  public RefreshAuthorizationPolicyProtocolServerSideTranslatorPB(
      RefreshAuthorizationPolicyProtocol impl) {
    this.impl = impl;
  }

  @Override
  public long getProtocolVersion(String protocol, long clientVersion)
      throws IOException {
    return RPC.getProtocolVersion(RefreshAuthorizationPolicyProtocolPB.class);
  }

  @Override
  public ProtocolSignature getProtocolSignature(String protocol,
      long clientVersion, int clientMethodsHash) throws IOException {
    /**
     * Don't forward this to the server. The protocol version and signature is
     * that of {@link RefreshAuthorizationPolicyProtocol}
     */
    if (!protocol.equals(RPC
        .getProtocolName(RefreshAuthorizationPolicyProtocolPB.class))) {
      throw new IOException("Namenode Serverside implements "
          + RPC.getProtocolName(RefreshAuthorizationPolicyProtocolPB.class)
          + ". The following requested protocol is unknown: " + protocol);
    }

    return ProtocolSignature.getProtocolSignature(clientMethodsHash,
        RPC.getProtocolVersion(RefreshAuthorizationPolicyProtocolPB.class),
        RefreshAuthorizationPolicyProtocolPB.class);
  }

  @Override
  public ProtocolSignatureWritable getProtocolSignature2(String protocol,
      long clientVersion, int clientMethodsHash) throws IOException {
    /**
     * Don't forward this to the server. The protocol version and signature is
     * that of {@link RefreshAuthorizationPolicyProtocolPB}
     */
    return ProtocolSignatureWritable.convert(this.getProtocolSignature(
        protocol, clientVersion, clientMethodsHash));
  }

  @Override
  public RefreshServiceAclResponseProto refreshServiceAcl(
      RpcController controller, RefreshServiceAclRequestProto request)
      throws ServiceException {
    try {
      impl.refreshServiceAcl();
    } catch (IOException e) {
      throw new ServiceException(e);
    }
    return RefreshServiceAclResponseProto.newBuilder().build();
  }
}