/// * // * Copyright 1999-2012 Alibaba Group. // * // * Licensed 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 fm.liu.timo.route.util; // // import org.junit.Assert; // import org.junit.Test; // // import fm.liu.timo.route.util.PartitionUtil; // /// ** // * @author xianmao.hexm from PartitionUtil.main() // */ // public class PartitionUtilTest { // // @Test // public void testPartition() { // // 本例的分区策略:希望将数据水平分成3份,前两份各占25%,第三份占50%。(故本例非均匀分区) // // |<---------------------1024------------------------>| // // |<----256--->|<----256--->|<----------512---------->| // // | partition0 | partition1 | partition2 | // // | 共2份,故count[0]=2 | 共1份,故count[1]=1 | // int[] count = new int[] {2, 1}; // int[] length = new int[] {256, 512}; // PartitionUtil pu = new PartitionUtil(count, length); // // // 下面代码演示分别以offerId字段或memberId字段根据上述分区策略拆分的分配结果 // int DEFAULT_STR_HEAD_LEN = 8; // timo默认会配置为此值 // long offerId = 12345; // String memberId = "qiushuo"; // // // 若根据offerId分配,partNo1将等于0,即按照上述分区策略,offerId为12345时将会被分配到partition0中 // int partNo1 = pu.partition(offerId); // // // 若根据memberId分配,partNo2将等于2,即按照上述分区策略,memberId为qiushuo时将会被分到partition2中 // int partNo2 = pu.partition(memberId, 0, DEFAULT_STR_HEAD_LEN); // // Assert.assertEquals(0, partNo1); // Assert.assertEquals(2, partNo2); // } // // }