| /** |
| * 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.hdfs; |
| |
| import java.io.IOException; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.fs.StorageType; |
| import org.apache.hadoop.hdfs.protocol.ExtendedBlock; |
| import org.apache.hadoop.hdfs.server.datanode.*; |
| import org.apache.hadoop.hdfs.server.datanode.fsdataset.FsDatasetSpi; |
| import org.apache.hadoop.test.GenericTestUtils; |
| import org.junit.Test; |
| |
| import static org.hamcrest.core.Is.is; |
| import static org.junit.Assert.*; |
| |
| |
| /** |
| * Test to verify that the DFSClient passes the expected block length to |
| * the DataNode via DataTransferProtocol. |
| */ |
| public class TestWriteBlockGetsBlockLengthHint { |
| static final long DEFAULT_BLOCK_LENGTH = 1024; |
| static final long EXPECTED_BLOCK_LENGTH = DEFAULT_BLOCK_LENGTH * 2; |
| |
| @Test |
| public void blockLengthHintIsPropagated() throws IOException { |
| final String METHOD_NAME = GenericTestUtils.getMethodName(); |
| final Path path = new Path("/" + METHOD_NAME + ".dat"); |
| |
| Configuration conf = new HdfsConfiguration(); |
| FsDatasetChecker.setFactory(conf); |
| conf.setLong(DFSConfigKeys.DFS_BLOCK_SIZE_KEY, DEFAULT_BLOCK_LENGTH); |
| conf.setInt(DFSConfigKeys.DFS_DATANODE_SCAN_PERIOD_HOURS_KEY, -1); |
| MiniDFSCluster cluster = new MiniDFSCluster.Builder(conf).numDataNodes(1).build(); |
| |
| try { |
| cluster.waitActive(); |
| |
| // FsDatasetChecker#createRbw asserts during block creation if the test |
| // fails. |
| DFSTestUtil.createFile( |
| cluster.getFileSystem(), |
| path, |
| 4096, // Buffer size. |
| EXPECTED_BLOCK_LENGTH, |
| EXPECTED_BLOCK_LENGTH, |
| (short) 1, |
| 0x1BAD5EED); |
| } finally { |
| cluster.shutdown(); |
| } |
| } |
| |
| static class FsDatasetChecker extends SimulatedFSDataset { |
| static class Factory extends FsDatasetSpi.Factory<SimulatedFSDataset> { |
| @Override |
| public SimulatedFSDataset newInstance(DataNode datanode, |
| DataStorage storage, Configuration conf) throws IOException { |
| return new FsDatasetChecker(storage, conf); |
| } |
| |
| @Override |
| public boolean isSimulated() { |
| return true; |
| } |
| } |
| |
| public static void setFactory(Configuration conf) { |
| conf.set(DFSConfigKeys.DFS_DATANODE_FSDATASET_FACTORY_KEY, |
| Factory.class.getName()); |
| } |
| |
| public FsDatasetChecker(DataStorage storage, Configuration conf) { |
| super(storage, conf); |
| } |
| |
| /** |
| * Override createRbw to verify that the block length that is passed |
| * is correct. This requires both DFSOutputStream and BlockReceiver to |
| * correctly propagate the hint to FsDatasetSpi. |
| */ |
| @Override |
| public synchronized ReplicaHandler createRbw(StorageType storageType, |
| String storageId, ExtendedBlock b, boolean allowLazyPersist) |
| throws IOException { |
| assertThat(b.getLocalBlock().getNumBytes(), is(EXPECTED_BLOCK_LENGTH)); |
| return super.createRbw(storageType, storageId, b, allowLazyPersist); |
| } |
| } |
| } |