1 /** 2 * 3 * Licensed to the Apache Software Foundation (ASF) under one 4 * or more contributor license agreements. See the NOTICE file 5 * distributed with this work for additional information 6 * regarding copyright ownership. The ASF licenses this file 7 * to you under the Apache License, Version 2.0 (the 8 * "License"); you may not use this file except in compliance 9 * with the License. You may obtain a copy of the License at 10 * 11 * http://www.apache.org/licenses/LICENSE-2.0 12 * 13 * Unless required by applicable law or agreed to in writing, software 14 * distributed under the License is distributed on an "AS IS" BASIS, 15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 16 * See the License for the specific language governing permissions and 17 * limitations under the License. 18 */ 19 package org.apache.hadoop.hbase.mob.mapreduce; 20 21 import org.apache.hadoop.hbase.classification.InterfaceAudience; 22 import org.apache.hadoop.hbase.KeyValue; 23 import org.apache.hadoop.hbase.mob.MobFileName; 24 import org.apache.hadoop.io.Text; 25 import org.apache.hadoop.mapreduce.Partitioner; 26 27 /** 28 * The partitioner for the sweep job. 29 * The key is a mob file name. We bucket by date. 30 */ 31 @InterfaceAudience.Private 32 public class MobFilePathHashPartitioner extends Partitioner<Text, KeyValue> { 33 34 @Override 35 public int getPartition(Text fileName, KeyValue kv, int numPartitions) { 36 MobFileName mobFileName = MobFileName.create(fileName.toString()); 37 String date = mobFileName.getDate(); 38 int hash = date.hashCode(); 39 return (hash & Integer.MAX_VALUE) % numPartitions; 40 } 41 }