io.druid.timeline.partition.NumberedShardSpec Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of druid-server Show documentation
Druid Server
The newest version!
/*
 * Druid - a distributed column store.
 * Copyright (C) 2012, 2013  Metamarkets Group Inc.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */

package io.druid.timeline.partition;

import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonIgnore;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.google.common.base.Preconditions;
import io.druid.data.input.InputRow;

public class NumberedShardSpec implements ShardSpec
{
  @JsonIgnore
  final private int partitionNum;

  @JsonIgnore
  final private int partitions;

  @JsonCreator
  public NumberedShardSpec(
      @JsonProperty("partitionNum") int partitionNum,
      @JsonProperty("partitions") int partitions
  )
  {
    Preconditions.checkArgument(partitionNum >= 0, "partitionNum >= 0");
    Preconditions.checkArgument(partitionNum < partitions, "partitionNum < partitions");
    this.partitionNum = partitionNum;
    this.partitions = partitions;
  }

  @JsonProperty("partitionNum")
  @Override
  public int getPartitionNum()
  {
    return partitionNum;
  }

  @JsonProperty("partitions")
  public int getPartitions()
  {
    return partitions;
  }

  @Override
  public  PartitionChunk createChunk(T obj)
  {
    return NumberedPartitionChunk.make(partitionNum, partitions, obj);
  }

  @Override
  public boolean isInChunk(InputRow inputRow)
  {
    return true;
  }

  @Override
  public String toString()
  {
    return "NumberedShardSpec{" +
           "partitionNum=" + partitionNum +
           ", partitions=" + partitions +
           '}';
  }
}