| /* |
| * 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.hints; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.nio.ByteBuffer; |
| import java.nio.file.Files; |
| import java.util.Iterator; |
| import java.util.UUID; |
| import java.util.concurrent.TimeUnit; |
| import java.util.zip.CRC32; |
| |
| import com.google.common.collect.Iterables; |
| import org.junit.Test; |
| |
| import org.apache.cassandra.SchemaLoader; |
| import org.apache.cassandra.config.CFMetaData; |
| import org.apache.cassandra.config.Schema; |
| import org.apache.cassandra.db.Mutation; |
| import org.apache.cassandra.db.RowUpdateBuilder; |
| import org.apache.cassandra.db.rows.Cell; |
| import org.apache.cassandra.db.rows.Row; |
| import org.apache.cassandra.io.util.FileUtils; |
| import org.apache.cassandra.schema.KeyspaceParams; |
| import org.apache.cassandra.utils.FBUtilities; |
| |
| import static junit.framework.Assert.assertEquals; |
| import static junit.framework.Assert.assertNotNull; |
| import static junit.framework.Assert.assertTrue; |
| |
| import static org.apache.cassandra.Util.dk; |
| import static org.apache.cassandra.utils.ByteBufferUtil.bytes; |
| |
| public class HintsWriteThenReadTest |
| { |
| private static final String KEYSPACE = "hints_write_then_read_test"; |
| private static final String TABLE = "table"; |
| |
| private static final int HINTS_COUNT = 10_000_000; |
| |
| @Test |
| public void testWriteReadCycle() throws IOException |
| { |
| SchemaLoader.prepareServer(); |
| SchemaLoader.createKeyspace(KEYSPACE, KeyspaceParams.simple(1), SchemaLoader.standardCFMD(KEYSPACE, TABLE)); |
| |
| HintsDescriptor descriptor = new HintsDescriptor(UUID.randomUUID(), System.currentTimeMillis()); |
| |
| File directory = Files.createTempDirectory(null).toFile(); |
| try |
| { |
| testWriteReadCycle(directory, descriptor); |
| } |
| finally |
| { |
| directory.deleteOnExit(); |
| } |
| } |
| |
| private void testWriteReadCycle(File directory, HintsDescriptor descriptor) throws IOException |
| { |
| // write HINTS_COUNT hints to a file |
| writeHints(directory, descriptor); |
| |
| // calculate the checksum of the file, then compare to the .crc32 checksum file content |
| verifyChecksum(directory, descriptor); |
| |
| // iterate over the written hints, make sure they are all present |
| verifyHints(directory, descriptor); |
| } |
| |
| private void writeHints(File directory, HintsDescriptor descriptor) throws IOException |
| { |
| try (HintsWriter writer = HintsWriter.create(directory, descriptor)) |
| { |
| write(writer, descriptor.timestamp); |
| } |
| } |
| |
| private static void verifyChecksum(File directory, HintsDescriptor descriptor) throws IOException |
| { |
| File hintsFile = new File(directory, descriptor.fileName()); |
| File checksumFile = new File(directory, descriptor.checksumFileName()); |
| |
| assertTrue(checksumFile.exists()); |
| |
| String actualChecksum = Integer.toHexString(calculateChecksum(hintsFile)); |
| String expectedChecksum = Files.readAllLines(checksumFile.toPath()).iterator().next(); |
| |
| assertEquals(expectedChecksum, actualChecksum); |
| } |
| |
| private void verifyHints(File directory, HintsDescriptor descriptor) |
| { |
| long baseTimestamp = descriptor.timestamp; |
| int index = 0; |
| |
| try (HintsReader reader = HintsReader.open(new File(directory, descriptor.fileName()))) |
| { |
| for (HintsReader.Page page : reader) |
| { |
| Iterator<Hint> hints = page.hintsIterator(); |
| while (hints.hasNext()) |
| { |
| Hint hint = hints.next(); |
| |
| long timestamp = baseTimestamp + index; |
| Mutation mutation = hint.mutation; |
| |
| assertEquals(timestamp, hint.creationTime); |
| assertEquals(dk(bytes(index)), mutation.key()); |
| |
| Row row = mutation.getPartitionUpdates().iterator().next().iterator().next(); |
| assertEquals(1, Iterables.size(row.cells())); |
| assertEquals(bytes(index), row.clustering().get(0)); |
| Cell cell = row.cells().iterator().next(); |
| assertNotNull(cell); |
| assertEquals(bytes(index), cell.value()); |
| assertEquals(timestamp * 1000, cell.timestamp()); |
| |
| index++; |
| } |
| } |
| } |
| |
| assertEquals(index, HINTS_COUNT); |
| } |
| |
| private void write(HintsWriter writer, long timestamp) throws IOException |
| { |
| ByteBuffer buffer = ByteBuffer.allocateDirect(256 * 1024); |
| try (HintsWriter.Session session = writer.newSession(buffer)) |
| { |
| write(session, timestamp); |
| } |
| FileUtils.clean(buffer); |
| } |
| |
| private void write(HintsWriter.Session session, long timestamp) throws IOException |
| { |
| for (int i = 0; i < HINTS_COUNT; i++) |
| session.append(createHint(i, timestamp)); |
| } |
| |
| private static Hint createHint(int idx, long baseTimestamp) |
| { |
| long timestamp = baseTimestamp + idx; |
| return Hint.create(createMutation(idx, TimeUnit.MILLISECONDS.toMicros(timestamp)), timestamp); |
| } |
| |
| private static Mutation createMutation(int index, long timestamp) |
| { |
| CFMetaData table = Schema.instance.getCFMetaData(KEYSPACE, TABLE); |
| return new RowUpdateBuilder(table, timestamp, bytes(index)) |
| .clustering(bytes(index)) |
| .add("val", bytes(index)) |
| .build(); |
| } |
| |
| private static int calculateChecksum(File file) throws IOException |
| { |
| CRC32 crc = new CRC32(); |
| byte[] buffer = new byte[FBUtilities.MAX_UNSIGNED_SHORT]; |
| |
| try (InputStream in = Files.newInputStream(file.toPath())) |
| { |
| int bytesRead; |
| while((bytesRead = in.read(buffer)) != -1) |
| crc.update(buffer, 0, bytesRead); |
| } |
| |
| return (int) crc.getValue(); |
| } |
| } |