| /** |
| * 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.server.datanode.fsdataset.impl; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.io.RandomAccessFile; |
| import java.nio.channels.FileChannel; |
| import java.nio.channels.FileLock; |
| import java.nio.channels.OverlappingFileLockException; |
| import java.util.Collection; |
| import java.util.Random; |
| |
| import org.apache.hadoop.hdfs.protocol.Block; |
| import org.apache.hadoop.hdfs.protocol.ExtendedBlock; |
| import org.apache.hadoop.hdfs.server.common.Storage; |
| import org.apache.hadoop.hdfs.server.datanode.DataNode; |
| import org.apache.hadoop.hdfs.server.datanode.ReplicaInfo; |
| import org.apache.hadoop.hdfs.server.datanode.StorageLocation; |
| import org.apache.hadoop.hdfs.server.datanode.fsdataset.FsDatasetSpi; |
| import org.apache.hadoop.io.IOUtils; |
| |
| import static org.junit.Assert.assertNotNull; |
| import static org.junit.Assert.fail; |
| |
| public class FsDatasetTestUtil { |
| |
| public static File getFile(FsDatasetSpi<?> fsd, String bpid, long bid) { |
| return ((FsDatasetImpl)fsd).getFile(bpid, bid, false); |
| } |
| |
| public static File getBlockFile(FsDatasetSpi<?> fsd, String bpid, Block b |
| ) throws IOException { |
| return ((FsDatasetImpl)fsd).getBlockFile(bpid, b.getBlockId()); |
| } |
| |
| public static File getMetaFile(FsDatasetSpi<?> fsd, String bpid, Block b) |
| throws IOException { |
| return FsDatasetUtil.getMetaFile(getBlockFile(fsd, bpid, b), b |
| .getGenerationStamp()); |
| } |
| |
| public static boolean breakHardlinksIfNeeded(FsDatasetSpi<?> fsd, |
| ExtendedBlock block) throws IOException { |
| final ReplicaInfo info = ((FsDatasetImpl)fsd).getReplicaInfo(block); |
| return info.breakHardLinksIfNeeded(); |
| } |
| |
| public static ReplicaInfo fetchReplicaInfo (final FsDatasetSpi<?> fsd, |
| final String bpid, final long blockId) { |
| return ((FsDatasetImpl)fsd).fetchReplicaInfo(bpid, blockId); |
| } |
| |
| public static Collection<ReplicaInfo> getReplicas(FsDatasetSpi<?> fsd, |
| String bpid) { |
| return ((FsDatasetImpl)fsd).volumeMap.replicas(bpid); |
| } |
| |
| /** |
| * Stop the lazy writer daemon that saves RAM disk files to persistent storage. |
| * @param dn |
| */ |
| public static void stopLazyWriter(DataNode dn) { |
| FsDatasetImpl fsDataset = ((FsDatasetImpl) dn.getFSDataset()); |
| ((FsDatasetImpl.LazyWriter) fsDataset.lazyWriter.getRunnable()).stop(); |
| } |
| |
| /** |
| * Asserts that the storage lock file in the given directory has been |
| * released. This method works by trying to acquire the lock file itself. If |
| * locking fails here, then the main code must have failed to release it. |
| * |
| * @param dir the storage directory to check |
| * @throws IOException if there is an unexpected I/O error |
| */ |
| public static void assertFileLockReleased(String dir) throws IOException { |
| StorageLocation sl = StorageLocation.parse(dir); |
| File lockFile = new File(sl.getFile(), Storage.STORAGE_FILE_LOCK); |
| try (RandomAccessFile raf = new RandomAccessFile(lockFile, "rws"); |
| FileChannel channel = raf.getChannel()) { |
| FileLock lock = channel.tryLock(); |
| assertNotNull(String.format( |
| "Lock file at %s appears to be held by a different process.", |
| lockFile.getAbsolutePath()), lock); |
| if (lock != null) { |
| try { |
| lock.release(); |
| } catch (IOException e) { |
| FsDatasetImpl.LOG.warn(String.format("I/O error releasing file lock %s.", |
| lockFile.getAbsolutePath()), e); |
| throw e; |
| } |
| } |
| } catch (OverlappingFileLockException e) { |
| fail(String.format("Must release lock file at %s.", |
| lockFile.getAbsolutePath())); |
| } |
| } |
| } |