com.metamx.tranquility.partition.HashCodePartitioner.scala Maven / Gradle / Ivy

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/*
 * Licensed to Metamarkets Group Inc. (Metamarkets) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  Metamarkets 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 com.metamx.tranquility.partition

import com.google.common.hash.Hashing

/**
  * Partitioner that uses the hashCode of the underlying object. This is rarely going to be what you want, but at
  * least it's simple.
  */
class HashCodePartitioner[A] extends Partitioner[A]
{
  override def partition(a: A, numPartitions: Int): Int = {
    Hashing.consistentHash(a.hashCode(), numPartitions)
  }
}