content: /*
   * 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.spark.network.shuffle.protocol;
  
  import java.util.Arrays;
  
  import com.google.common.base.Objects;
  import io.netty.buffer.ByteBuf;
  
  import org.apache.spark.network.protocol.Encoders;
  
  // Needed by ScalaDoc. See SPARK-7726
  import static org.apache.spark.network.shuffle.protocol.BlockTransferMessage.Type;
  
  /** Request to read a set of blocks. Returns {@link StreamHandle}. */
  public class OpenBlocks extends BlockTransferMessage {
    public final String appId;
    public final String execId;
    public final String[] blockIds;
  
    public OpenBlocks(String appId, String execId, String[] blockIds) {
      this.appId = appId;
      this.execId = execId;
      this.blockIds = blockIds;
    }
  
    @Override
    protected Type type() { return Type.OPEN_BLOCKS; }
  
    @Override
    public int hashCode() {
      return Objects.hashCode(appId, execId) * 41 + Arrays.hashCode(blockIds);
    }
  
    @Override
    public String toString() {
      return Objects.toStringHelper(this)
        .add("appId", appId)
        .add("execId", execId)
        .add("blockIds", Arrays.toString(blockIds))
        .toString();
    }
  
    @Override
    public boolean equals(Object other) {
      if (other != null && other instanceof OpenBlocks) {
        OpenBlocks o = (OpenBlocks) other;
        return Objects.equal(appId, o.appId)
          && Objects.equal(execId, o.execId)
          && Arrays.equals(blockIds, o.blockIds);
      }
      return false;
    }
  
    @Override
    public int encodedLength() {
      return Encoders.Strings.encodedLength(appId)
        + Encoders.Strings.encodedLength(execId)
        + Encoders.StringArrays.encodedLength(blockIds);
    }
  
    @Override
    public void encode(ByteBuf buf) {
      Encoders.Strings.encode(buf, appId);
      Encoders.Strings.encode(buf, execId);
      Encoders.StringArrays.encode(buf, blockIds);
    }
  
    public static OpenBlocks decode(ByteBuf buf) {
      String appId = Encoders.Strings.decode(buf);
      String execId = Encoders.Strings.decode(buf);
      String[] blockIds = Encoders.StringArrays.decode(buf);
      return new OpenBlocks(appId, execId, blockIds);
    }
  }
  