| /** |
| * 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.cassandra.io.compress; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.io.RandomAccessFile; |
| import java.util.Random; |
| |
| import org.junit.Test; |
| import org.apache.cassandra.db.ClusteringComparator; |
| import org.apache.cassandra.db.marshal.BytesType; |
| import org.apache.cassandra.exceptions.ConfigurationException; |
| import org.apache.cassandra.io.sstable.CorruptSSTableException; |
| import org.apache.cassandra.io.sstable.metadata.MetadataCollector; |
| import org.apache.cassandra.io.util.ChannelProxy; |
| import org.apache.cassandra.io.util.DataPosition; |
| import org.apache.cassandra.io.util.MmappedRegions; |
| import org.apache.cassandra.io.util.RandomAccessReader; |
| import org.apache.cassandra.io.util.SequentialWriter; |
| import org.apache.cassandra.schema.CompressionParams; |
| import org.apache.cassandra.utils.ChecksumType; |
| import org.apache.cassandra.utils.SyncUtil; |
| |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertNotNull; |
| import static org.junit.Assert.assertSame; |
| import static org.junit.Assert.assertTrue; |
| |
| public class CompressedRandomAccessReaderTest |
| { |
| @Test |
| public void testResetAndTruncate() throws IOException |
| { |
| // test reset in current buffer or previous one |
| testResetAndTruncate(File.createTempFile("normal", "1"), false, false, 10); |
| testResetAndTruncate(File.createTempFile("normal", "2"), false, false, CompressionParams.DEFAULT_CHUNK_LENGTH); |
| } |
| |
| @Test |
| public void testResetAndTruncateCompressed() throws IOException |
| { |
| // test reset in current buffer or previous one |
| testResetAndTruncate(File.createTempFile("compressed", "1"), true, false, 10); |
| testResetAndTruncate(File.createTempFile("compressed", "2"), true, false, CompressionParams.DEFAULT_CHUNK_LENGTH); |
| } |
| |
| @Test |
| public void testResetAndTruncateCompressedMmap() throws IOException |
| { |
| // test reset in current buffer or previous one |
| testResetAndTruncate(File.createTempFile("compressed_mmap", "1"), true, true, 10); |
| testResetAndTruncate(File.createTempFile("compressed_mmap", "2"), true, true, CompressionParams.DEFAULT_CHUNK_LENGTH); |
| } |
| |
| @Test |
| public void test6791() throws IOException, ConfigurationException |
| { |
| File f = File.createTempFile("compressed6791_", "3"); |
| String filename = f.getAbsolutePath(); |
| try(ChannelProxy channel = new ChannelProxy(f)) |
| { |
| |
| MetadataCollector sstableMetadataCollector = new MetadataCollector(new ClusteringComparator(BytesType.instance)); |
| try(CompressedSequentialWriter writer = new CompressedSequentialWriter(f, filename + ".metadata", CompressionParams.snappy(32), sstableMetadataCollector)) |
| { |
| |
| for (int i = 0; i < 20; i++) |
| writer.write("x".getBytes()); |
| |
| DataPosition mark = writer.mark(); |
| // write enough garbage to create new chunks: |
| for (int i = 0; i < 40; ++i) |
| writer.write("y".getBytes()); |
| |
| writer.resetAndTruncate(mark); |
| |
| for (int i = 0; i < 20; i++) |
| writer.write("x".getBytes()); |
| writer.finish(); |
| } |
| |
| try(RandomAccessReader reader = new CompressedRandomAccessReader.Builder(channel, |
| new CompressionMetadata(filename + ".metadata", f.length(), ChecksumType.CRC32)) |
| .build()) |
| { |
| String res = reader.readLine(); |
| assertEquals(res, "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"); |
| assertEquals(40, res.length()); |
| } |
| } |
| finally |
| { |
| if (f.exists()) |
| assertTrue(f.delete()); |
| File metadata = new File(filename+ ".metadata"); |
| if (metadata.exists()) |
| metadata.delete(); |
| } |
| } |
| |
| private static void testResetAndTruncate(File f, boolean compressed, boolean usemmap, int junkSize) throws IOException |
| { |
| final String filename = f.getAbsolutePath(); |
| try(ChannelProxy channel = new ChannelProxy(f)) |
| { |
| MetadataCollector sstableMetadataCollector = new MetadataCollector(new ClusteringComparator(BytesType.instance)); |
| try(SequentialWriter writer = compressed |
| ? new CompressedSequentialWriter(f, filename + ".metadata", CompressionParams.snappy(), sstableMetadataCollector) |
| : SequentialWriter.open(f)) |
| { |
| writer.write("The quick ".getBytes()); |
| DataPosition mark = writer.mark(); |
| writer.write("blue fox jumps over the lazy dog".getBytes()); |
| |
| // write enough to be sure to change chunk |
| for (int i = 0; i < junkSize; ++i) |
| { |
| writer.write((byte) 1); |
| } |
| |
| writer.resetAndTruncate(mark); |
| writer.write("brown fox jumps over the lazy dog".getBytes()); |
| writer.finish(); |
| } |
| assert f.exists(); |
| |
| CompressionMetadata compressionMetadata = compressed ? new CompressionMetadata(filename + ".metadata", f.length(), ChecksumType.CRC32) : null; |
| RandomAccessReader.Builder builder = compressed |
| ? new CompressedRandomAccessReader.Builder(channel, compressionMetadata) |
| : new RandomAccessReader.Builder(channel); |
| |
| if (usemmap) |
| { |
| if (compressed) |
| builder.regions(MmappedRegions.map(channel, compressionMetadata)); |
| else |
| builder.regions(MmappedRegions.map(channel, f.length())); |
| } |
| |
| try(RandomAccessReader reader = builder.build()) |
| { |
| String expected = "The quick brown fox jumps over the lazy dog"; |
| assertEquals(expected.length(), reader.length()); |
| byte[] b = new byte[expected.length()]; |
| reader.readFully(b); |
| assert new String(b).equals(expected) : "Expecting '" + expected + "', got '" + new String(b) + '\''; |
| } |
| |
| if (usemmap) |
| builder.regions.close(); |
| } |
| finally |
| { |
| if (f.exists()) |
| assertTrue(f.delete()); |
| File metadata = new File(filename + ".metadata"); |
| if (compressed && metadata.exists()) |
| metadata.delete(); |
| } |
| } |
| |
| @Test |
| public void testDataCorruptionDetection() throws IOException |
| { |
| String CONTENT = "Lorem ipsum dolor sit amet, consectetur adipiscing elit. Etiam vitae."; |
| |
| File file = new File("testDataCorruptionDetection"); |
| file.deleteOnExit(); |
| |
| File metadata = new File(file.getPath() + ".meta"); |
| metadata.deleteOnExit(); |
| |
| assertTrue(file.createNewFile()); |
| assertTrue(metadata.createNewFile()); |
| |
| MetadataCollector sstableMetadataCollector = new MetadataCollector(new ClusteringComparator(BytesType.instance)); |
| try (SequentialWriter writer = new CompressedSequentialWriter(file, metadata.getPath(), CompressionParams.snappy(), sstableMetadataCollector)) |
| { |
| writer.write(CONTENT.getBytes()); |
| writer.finish(); |
| } |
| |
| try(ChannelProxy channel = new ChannelProxy(file)) |
| { |
| // open compression metadata and get chunk information |
| CompressionMetadata meta = new CompressionMetadata(metadata.getPath(), file.length(), ChecksumType.CRC32); |
| CompressionMetadata.Chunk chunk = meta.chunkFor(0); |
| |
| try(RandomAccessReader reader = new CompressedRandomAccessReader.Builder(channel, meta).build()) |
| {// read and verify compressed data |
| assertEquals(CONTENT, reader.readLine()); |
| |
| Random random = new Random(); |
| RandomAccessFile checksumModifier = null; |
| |
| try |
| { |
| checksumModifier = new RandomAccessFile(file, "rw"); |
| byte[] checksum = new byte[4]; |
| |
| // seek to the end of the compressed chunk |
| checksumModifier.seek(chunk.length); |
| // read checksum bytes |
| checksumModifier.read(checksum); |
| // seek back to the chunk end |
| checksumModifier.seek(chunk.length); |
| |
| // lets modify one byte of the checksum on each iteration |
| for (int i = 0; i < checksum.length; i++) |
| { |
| checksumModifier.write(random.nextInt()); |
| SyncUtil.sync(checksumModifier); // making sure that change was synced with disk |
| |
| try (final RandomAccessReader r = new CompressedRandomAccessReader.Builder(channel, meta).build()) |
| { |
| Throwable exception = null; |
| try |
| { |
| r.readLine(); |
| } |
| catch (Throwable t) |
| { |
| exception = t; |
| } |
| assertNotNull(exception); |
| assertSame(exception.getClass(), CorruptSSTableException.class); |
| assertSame(exception.getCause().getClass(), CorruptBlockException.class); |
| } |
| } |
| |
| // lets write original checksum and check if we can read data |
| updateChecksum(checksumModifier, chunk.length, checksum); |
| |
| try (RandomAccessReader cr = new CompressedRandomAccessReader.Builder(channel, meta).build()) |
| { |
| // read and verify compressed data |
| assertEquals(CONTENT, cr.readLine()); |
| // close reader |
| } |
| } |
| finally |
| { |
| if (checksumModifier != null) |
| checksumModifier.close(); |
| } |
| } |
| } |
| } |
| |
| private static void updateChecksum(RandomAccessFile file, long checksumOffset, byte[] checksum) throws IOException |
| { |
| file.seek(checksumOffset); |
| file.write(checksum); |
| SyncUtil.sync(file); |
| } |
| } |