| /** |
| * 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 org.apache.hadoop.mapreduce.lib.partition; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.io.BinaryComparable; |
| import org.apache.hadoop.io.BytesWritable; |
| import org.apache.hadoop.util.ReflectionUtils; |
| |
| import junit.framework.TestCase; |
| |
| public class TestBinaryPartitioner extends TestCase { |
| |
| public void testDefaultOffsets() { |
| Configuration conf = new Configuration(); |
| BinaryPartitioner<?> partitioner = |
| ReflectionUtils.newInstance(BinaryPartitioner.class, conf); |
| |
| BinaryComparable key1 = new BytesWritable(new byte[] { 1, 2, 3, 4, 5 }); |
| BinaryComparable key2 = new BytesWritable(new byte[] { 1, 2, 3, 4, 5 }); |
| int partition1 = partitioner.getPartition(key1, null, 10); |
| int partition2 = partitioner.getPartition(key2, null, 10); |
| assertEquals(partition1, partition2); |
| |
| key1 = new BytesWritable(new byte[] { 1, 2, 3, 4, 5 }); |
| key2 = new BytesWritable(new byte[] { 6, 2, 3, 4, 5 }); |
| partition1 = partitioner.getPartition(key1, null, 10); |
| partition2 = partitioner.getPartition(key2, null, 10); |
| assertTrue(partition1 != partition2); |
| |
| key1 = new BytesWritable(new byte[] { 1, 2, 3, 4, 5 }); |
| key2 = new BytesWritable(new byte[] { 1, 2, 3, 4, 6 }); |
| partition1 = partitioner.getPartition(key1, null, 10); |
| partition2 = partitioner.getPartition(key2, null, 10); |
| assertTrue(partition1 != partition2); |
| } |
| |
| public void testCustomOffsets() { |
| Configuration conf = new Configuration(); |
| BinaryComparable key1 = new BytesWritable(new byte[] { 1, 2, 3, 4, 5 }); |
| BinaryComparable key2 = new BytesWritable(new byte[] { 6, 2, 3, 7, 8 }); |
| |
| BinaryPartitioner.setOffsets(conf, 1, -3); |
| BinaryPartitioner<?> partitioner = |
| ReflectionUtils.newInstance(BinaryPartitioner.class, conf); |
| int partition1 = partitioner.getPartition(key1, null, 10); |
| int partition2 = partitioner.getPartition(key2, null, 10); |
| assertEquals(partition1, partition2); |
| |
| BinaryPartitioner.setOffsets(conf, 1, 2); |
| partitioner = ReflectionUtils.newInstance(BinaryPartitioner.class, conf); |
| partition1 = partitioner.getPartition(key1, null, 10); |
| partition2 = partitioner.getPartition(key2, null, 10); |
| assertEquals(partition1, partition2); |
| |
| BinaryPartitioner.setOffsets(conf, -4, -3); |
| partitioner = ReflectionUtils.newInstance(BinaryPartitioner.class, conf); |
| partition1 = partitioner.getPartition(key1, null, 10); |
| partition2 = partitioner.getPartition(key2, null, 10); |
| assertEquals(partition1, partition2); |
| } |
| |
| public void testLowerBound() { |
| Configuration conf = new Configuration(); |
| BinaryPartitioner.setLeftOffset(conf, 0); |
| BinaryPartitioner<?> partitioner = |
| ReflectionUtils.newInstance(BinaryPartitioner.class, conf); |
| BinaryComparable key1 = new BytesWritable(new byte[] { 1, 2, 3, 4, 5 }); |
| BinaryComparable key2 = new BytesWritable(new byte[] { 6, 2, 3, 4, 5 }); |
| int partition1 = partitioner.getPartition(key1, null, 10); |
| int partition2 = partitioner.getPartition(key2, null, 10); |
| assertTrue(partition1 != partition2); |
| } |
| |
| public void testUpperBound() { |
| Configuration conf = new Configuration(); |
| BinaryPartitioner.setRightOffset(conf, 4); |
| BinaryPartitioner<?> partitioner = |
| ReflectionUtils.newInstance(BinaryPartitioner.class, conf); |
| BinaryComparable key1 = new BytesWritable(new byte[] { 1, 2, 3, 4, 5 }); |
| BinaryComparable key2 = new BytesWritable(new byte[] { 1, 2, 3, 4, 6 }); |
| int partition1 = partitioner.getPartition(key1, null, 10); |
| int partition2 = partitioner.getPartition(key2, null, 10); |
| assertTrue(partition1 != partition2); |
| } |
| |
| } |