| /** |
| * 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.mapred.gridmix; |
| |
| import java.io.ByteArrayOutputStream; |
| import java.io.IOException; |
| import java.io.OutputStream; |
| import java.util.Arrays; |
| |
| import org.junit.AfterClass; |
| import org.junit.BeforeClass; |
| import org.junit.Test; |
| import static org.junit.Assert.*; |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.FileSystem; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.mapreduce.lib.input.CombineFileSplit; |
| |
| public class TestFileQueue { |
| |
| static final Log LOG = LogFactory.getLog(TestFileQueue.class); |
| static final int NFILES = 4; |
| static final int BLOCK = 256; |
| static final Path[] paths = new Path[NFILES]; |
| static final String[] loc = new String[NFILES]; |
| static final long[] start = new long[NFILES]; |
| static final long[] len = new long[NFILES]; |
| |
| @BeforeClass |
| public static void setup() throws IOException { |
| final Configuration conf = new Configuration(); |
| final FileSystem fs = FileSystem.getLocal(conf).getRaw(); |
| final Path p = new Path(System.getProperty("test.build.data", "/tmp"), |
| "testFileQueue").makeQualified(fs); |
| fs.delete(p, true); |
| final byte[] b = new byte[BLOCK]; |
| for (int i = 0; i < NFILES; ++i) { |
| Arrays.fill(b, (byte)('A' + i)); |
| paths[i] = new Path(p, "" + (char)('A' + i)); |
| OutputStream f = null; |
| try { |
| f = fs.create(paths[i]); |
| f.write(b); |
| } finally { |
| if (f != null) { |
| f.close(); |
| } |
| } |
| } |
| } |
| |
| @AfterClass |
| public static void cleanup() throws IOException { |
| final Configuration conf = new Configuration(); |
| final FileSystem fs = FileSystem.getLocal(conf).getRaw(); |
| final Path p = new Path(System.getProperty("test.build.data", "/tmp"), |
| "testFileQueue").makeQualified(fs); |
| fs.delete(p, true); |
| } |
| |
| static ByteArrayOutputStream fillVerif() throws IOException { |
| final byte[] b = new byte[BLOCK]; |
| final ByteArrayOutputStream out = new ByteArrayOutputStream(); |
| for (int i = 0; i < NFILES; ++i) { |
| Arrays.fill(b, (byte)('A' + i)); |
| out.write(b, 0, (int)len[i]); |
| } |
| return out; |
| } |
| |
| @Test |
| public void testRepeat() throws Exception { |
| final Configuration conf = new Configuration(); |
| Arrays.fill(loc, ""); |
| Arrays.fill(start, 0L); |
| Arrays.fill(len, BLOCK); |
| |
| final ByteArrayOutputStream out = fillVerif(); |
| final FileQueue q = |
| new FileQueue(new CombineFileSplit(paths, start, len, loc), conf); |
| final byte[] verif = out.toByteArray(); |
| final byte[] check = new byte[2 * NFILES * BLOCK]; |
| q.read(check, 0, NFILES * BLOCK); |
| assertArrayEquals(verif, Arrays.copyOf(check, NFILES * BLOCK)); |
| |
| final byte[] verif2 = new byte[2 * NFILES * BLOCK]; |
| System.arraycopy(verif, 0, verif2, 0, verif.length); |
| System.arraycopy(verif, 0, verif2, verif.length, verif.length); |
| q.read(check, 0, 2 * NFILES * BLOCK); |
| assertArrayEquals(verif2, check); |
| |
| } |
| |
| @Test |
| public void testUneven() throws Exception { |
| final Configuration conf = new Configuration(); |
| Arrays.fill(loc, ""); |
| Arrays.fill(start, 0L); |
| Arrays.fill(len, BLOCK); |
| |
| final int B2 = BLOCK / 2; |
| for (int i = 0; i < NFILES; i += 2) { |
| start[i] += B2; |
| len[i] -= B2; |
| } |
| final FileQueue q = |
| new FileQueue(new CombineFileSplit(paths, start, len, loc), conf); |
| final ByteArrayOutputStream out = fillVerif(); |
| final byte[] verif = out.toByteArray(); |
| final byte[] check = new byte[NFILES / 2 * BLOCK + NFILES / 2 * B2]; |
| q.read(check, 0, verif.length); |
| assertArrayEquals(verif, Arrays.copyOf(check, verif.length)); |
| q.read(check, 0, verif.length); |
| assertArrayEquals(verif, Arrays.copyOf(check, verif.length)); |
| } |
| |
| @Test |
| public void testEmpty() throws Exception { |
| final Configuration conf = new Configuration(); |
| // verify OK if unused |
| final FileQueue q = new FileQueue(new CombineFileSplit( |
| new Path[0], new long[0], new long[0], new String[0]), conf); |
| } |
| |
| } |