hadoop GetDestinationResponsePBImpl 源码

haddop GetDestinationResponsePBImpl 代码

文件路径：/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/store/protocol/impl/pb/GetDestinationResponsePBImpl.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.server.federation.store.protocol.impl.pb;

import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;

import org.apache.hadoop.hdfs.federation.protocol.proto.HdfsServerFederationProtos.GetDestinationResponseProto;
import org.apache.hadoop.hdfs.federation.protocol.proto.HdfsServerFederationProtos.GetDestinationResponseProto.Builder;
import org.apache.hadoop.hdfs.federation.protocol.proto.HdfsServerFederationProtos.GetDestinationResponseProtoOrBuilder;
import org.apache.hadoop.hdfs.server.federation.store.protocol.GetDestinationResponse;
import org.apache.hadoop.hdfs.server.federation.store.records.impl.pb.PBRecord;

import org.apache.hadoop.thirdparty.protobuf.Message;

/**
 * Protobuf implementation of the state store API object
 * GetDestinationResponse.
 */
public class GetDestinationResponsePBImpl
    extends GetDestinationResponse implements PBRecord {

  private FederationProtocolPBTranslator<GetDestinationResponseProto,
      Builder, GetDestinationResponseProtoOrBuilder> translator =
          new FederationProtocolPBTranslator<>(
              GetDestinationResponseProto.class);

  public GetDestinationResponsePBImpl() {
  }

  public GetDestinationResponsePBImpl(
      GetDestinationResponseProto proto) {
    this.translator.setProto(proto);
  }

  @Override
  public GetDestinationResponseProto getProto() {
    // if builder is null build() returns null, calling getBuilder() to
    // instantiate builder
    this.translator.getBuilder();
    return this.translator.build();
  }

  @Override
  public void setProto(Message proto) {
    this.translator.setProto(proto);
  }

  @Override
  public void readInstance(String base64String) throws IOException {
    this.translator.readInstance(base64String);
  }

  @Override
  public Collection<String> getDestinations() {
    return new ArrayList<>(
        this.translator.getProtoOrBuilder().getDestinationsList());
  }

  @Override
  public void setDestinations(Collection<String> nsIds) {
    this.translator.getBuilder().clearDestinations();
    for (String nsId : nsIds) {
      this.translator.getBuilder().addDestinations(nsId);
    }
  }
}

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