com.sirius.hadoop.job.onlinetime.StatusKeyPartitioner.java Source code

Introduction

Here is the source code for com.sirius.hadoop.job.onlinetime.StatusKeyPartitioner.java

Source

/*
 * *
 *  * 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 com.sirius.hadoop.job.onlinetime;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.io.NullWritable;
import org.apache.hadoop.mapreduce.Partitioner;

/**
 * Created by pippo on 14-9-19.
 */
public class StatusKeyPartitioner extends Partitioner<StatusKey, NullWritable> {

    private static final Log LOG = LogFactory.getLog(StatusKeyPartitioner.class);

    @Override
    public int getPartition(StatusKey key, NullWritable nullWritable, int numPartitions) {
        return (key.userId.hashCode() & Integer.MAX_VALUE) % numPartitions;
    }
}