| /** |
| * 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.datatorrent.lib.io.fs; |
| |
| import java.io.IOException; |
| |
| import org.junit.Assert; |
| import org.junit.Before; |
| import org.junit.Test; |
| import org.mockito.Matchers; |
| import org.mockito.Mock; |
| import org.mockito.MockitoAnnotations; |
| |
| import org.apache.hadoop.fs.FileStatus; |
| import org.apache.hadoop.fs.FileSystem; |
| import org.apache.hadoop.fs.Path; |
| |
| import com.datatorrent.lib.io.fs.FileStitcher.BlockNotFoundException; |
| import com.datatorrent.lib.io.fs.HDFSFileMerger.FastMergerDecisionMaker; |
| import com.datatorrent.lib.io.fs.Synchronizer.OutputFileMetadata; |
| |
| import static org.junit.Assert.fail; |
| import static org.mockito.Mockito.when; |
| |
| /** |
| * Unit tests for {@link FastMergerDecisionMaker} |
| */ |
| |
| public class FastMergerDecisionMakerTest |
| { |
| private static final long DEFAULT_BLOCK_SIZE = 100L; |
| private static final short[] DEFAULT_REPLICATION = new short[] {(short)3, (short)3, (short)3 }; |
| |
| FastMergerDecisionMaker fastMergerDecisionMaker; |
| @Mock |
| OutputFileMetadata fileMetadata; |
| @Mock |
| FileSystem appFS; |
| @Mock |
| FileStatus status0; |
| @Mock |
| FileStatus status1; |
| @Mock |
| FileStatus status2; |
| |
| @Before |
| public void setup() throws IOException |
| { |
| MockitoAnnotations.initMocks(this); |
| when(appFS.exists(Matchers.any(Path.class))).thenReturn(true); |
| |
| when(fileMetadata.getNumberOfBlocks()).thenReturn(3); |
| when(fileMetadata.getBlockIds()).thenReturn(new long[] {0L, 1L, 2L }); |
| |
| fastMergerDecisionMaker = new FastMergerDecisionMaker("", appFS, DEFAULT_BLOCK_SIZE); |
| } |
| |
| /** |
| * If some block is missing then expect BlockNotFoundException. |
| * |
| * @throws IOException |
| * @throws BlockNotFoundException |
| */ |
| @Test(expected = BlockNotFoundException.class) |
| public void testMissingBlock() throws IOException, BlockNotFoundException |
| { |
| when(appFS.exists(new Path("/0"))).thenReturn(true); |
| when(appFS.exists(new Path("/1"))).thenReturn(false); |
| |
| when(status0.getReplication()).thenReturn(DEFAULT_REPLICATION[0]); |
| when(status0.getLen()).thenReturn(DEFAULT_BLOCK_SIZE); |
| |
| when(appFS.getFileStatus(new Path("/0"))).thenReturn(status0); |
| |
| fastMergerDecisionMaker.isFastMergePossible(fileMetadata); |
| fail("Failed when one block missing."); |
| } |
| |
| private void initializeMocks(long[] blockSizes, short[] replication) throws IOException, BlockNotFoundException |
| { |
| when(status0.getReplication()).thenReturn(replication[0]); |
| when(status1.getReplication()).thenReturn(replication[1]); |
| when(status2.getReplication()).thenReturn(replication[2]); |
| |
| when(status0.getLen()).thenReturn(blockSizes[0]); |
| when(status1.getLen()).thenReturn(blockSizes[1]); |
| when(status2.getLen()).thenReturn(blockSizes[2]); |
| |
| when(appFS.getFileStatus(new Path("/0"))).thenReturn(status0); |
| when(appFS.getFileStatus(new Path("/1"))).thenReturn(status1); |
| when(appFS.getFileStatus(new Path("/2"))).thenReturn(status2); |
| } |
| |
| /** |
| * All blocks are of same size which is same as default blockSize. Then fast |
| * merge is possible |
| * |
| * @throws IOException |
| * @throws BlockNotFoundException |
| */ |
| @Test |
| public void testAllBlockDefaultBlockSize() throws IOException, BlockNotFoundException |
| { |
| initializeMocks(new long[] {DEFAULT_BLOCK_SIZE, DEFAULT_BLOCK_SIZE, DEFAULT_BLOCK_SIZE }, DEFAULT_REPLICATION); |
| Assert.assertTrue(fastMergerDecisionMaker.isFastMergePossible(fileMetadata)); |
| } |
| |
| /** |
| * All blocks (except last block)are of same size which is same as default |
| * blockSize. Last block is smaller than default blockSize Then fast merge is |
| * possible |
| * |
| * @throws IOException |
| * @throws BlockNotFoundException |
| */ |
| @Test |
| public void testAllExceptLastBlockDefaultBlockSize() throws IOException, BlockNotFoundException |
| { |
| initializeMocks(new long[] {DEFAULT_BLOCK_SIZE, DEFAULT_BLOCK_SIZE, DEFAULT_BLOCK_SIZE - 10 }, |
| DEFAULT_REPLICATION); |
| Assert.assertTrue(fastMergerDecisionMaker.isFastMergePossible(fileMetadata)); |
| } |
| |
| /** |
| * Some block other than last block is of different size. Then fast merge is |
| * not possible |
| * |
| * @throws IOException |
| * @throws BlockNotFoundException |
| */ |
| @Test |
| public void testIntermediateBlockDifferentSize() throws IOException, BlockNotFoundException |
| { |
| initializeMocks(new long[] {DEFAULT_BLOCK_SIZE, DEFAULT_BLOCK_SIZE - 10, DEFAULT_BLOCK_SIZE }, |
| DEFAULT_REPLICATION); |
| Assert.assertFalse(fastMergerDecisionMaker.isFastMergePossible(fileMetadata)); |
| } |
| |
| /** |
| * Some block other than last block is of different size. Then fast merge is |
| * not possible |
| * |
| * @throws IOException |
| * @throws BlockNotFoundException |
| */ |
| @Test |
| public void testAllExceptLastBlockMultipleOfDefaultBlockSize() throws IOException, BlockNotFoundException |
| { |
| initializeMocks(new long[] {2 * DEFAULT_BLOCK_SIZE, 2 * DEFAULT_BLOCK_SIZE, 2 * DEFAULT_BLOCK_SIZE - 10 }, |
| DEFAULT_REPLICATION); |
| Assert.assertTrue(fastMergerDecisionMaker.isFastMergePossible(fileMetadata)); |
| } |
| |
| /** |
| * Some block other than last block is of different size. Then fast merge is |
| * not possible |
| * |
| * @throws IOException |
| * @throws BlockNotFoundException |
| */ |
| @Test |
| public void testReplicationNotMatching() throws IOException, BlockNotFoundException |
| { |
| initializeMocks(new long[] {2 * DEFAULT_BLOCK_SIZE, 2 * DEFAULT_BLOCK_SIZE, 2 * DEFAULT_BLOCK_SIZE - 10 }, |
| new short[] {(short)3, (short)2, (short)3 }); |
| Assert.assertFalse(fastMergerDecisionMaker.isFastMergePossible(fileMetadata)); |
| } |
| |
| } |