com.chinamobile.bcbsp.router.RangeRoute.java Source code

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Here is the source code for com.chinamobile.bcbsp.router.RangeRoute.java

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/*
 * 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.chinamobile.bcbsp.router;

import java.util.HashMap;

import org.apache.hadoop.io.Text;

/**
 * The RangeRoute implements route to decide a vertex is belong to which
 * partition.
 * @author wyj
 */
public class RangeRoute implements route {
    /**The RangeRouter is a HashMap which the key is the maxcountid of a
     *partition,the value is the partitionid.*/
    private HashMap<Integer, Integer> rangerouter = null;

    /**
     * Constructor of the class.
     * @param aRangeRouter is a HashMap which the key is the maxcountid of a
     * partition,the value is the partitionid.
     */
    RangeRoute(HashMap<Integer, Integer> aRangeRouter) {
        this.rangerouter = aRangeRouter;
    }

    /**The method decide the vertexid is belong to which partition.
     * @param vertexID The id of the vertex.
     * @return partitionid
     */
    @Override
    public int getpartitionID(Text vertexID) {
        int vertexid = Integer.parseInt(vertexID.toString());
        int tempMaxMin = Integer.MAX_VALUE;
        for (Integer e : rangerouter.keySet()) {
            if (vertexid <= e) {
                if (tempMaxMin > e) {
                    tempMaxMin = e;
                }
            }
        }
        return rangerouter.get(tempMaxMin);
    }
}