| /** |
| * |
| * 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.bookkeeper.bookie.storage.ldb; |
| |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.fail; |
| import io.netty.buffer.ByteBuf; |
| import io.netty.buffer.ByteBufAllocator; |
| import io.netty.buffer.Unpooled; |
| import java.io.File; |
| import java.io.IOException; |
| import java.util.concurrent.ScheduledExecutorService; |
| import org.apache.bookkeeper.bookie.Bookie; |
| import org.apache.bookkeeper.bookie.BookieException.OperationRejectedException; |
| import org.apache.bookkeeper.bookie.BookieImpl; |
| import org.apache.bookkeeper.bookie.CheckpointSource; |
| import org.apache.bookkeeper.bookie.Checkpointer; |
| import org.apache.bookkeeper.bookie.LedgerDirsManager; |
| import org.apache.bookkeeper.bookie.StateManager; |
| import org.apache.bookkeeper.conf.ServerConfiguration; |
| import org.apache.bookkeeper.conf.TestBKConfiguration; |
| import org.apache.bookkeeper.meta.LedgerManager; |
| import org.apache.bookkeeper.stats.StatsLogger; |
| import org.junit.After; |
| import org.junit.Before; |
| import org.junit.Test; |
| |
| /** |
| * Unit test for {@link DbLedgerStorage}. |
| */ |
| public class DbLedgerStorageWriteCacheTest { |
| |
| private DbLedgerStorage storage; |
| private File tmpDir; |
| |
| private static class MockedDbLedgerStorage extends DbLedgerStorage { |
| |
| @Override |
| protected SingleDirectoryDbLedgerStorage newSingleDirectoryDbLedgerStorage(ServerConfiguration conf, |
| LedgerManager ledgerManager, LedgerDirsManager ledgerDirsManager, LedgerDirsManager indexDirsManager, |
| StateManager stateManager, CheckpointSource checkpointSource, Checkpointer checkpointer, |
| StatsLogger statsLogger, ScheduledExecutorService gcExecutor, |
| long writeCacheSize, long readCacheSize) |
| throws IOException { |
| return new MockedSingleDirectoryDbLedgerStorage(conf, ledgerManager, ledgerDirsManager, indexDirsManager, |
| stateManager, checkpointSource, checkpointer, statsLogger, allocator, gcExecutor, writeCacheSize, |
| readCacheSize); |
| } |
| |
| private static class MockedSingleDirectoryDbLedgerStorage extends SingleDirectoryDbLedgerStorage { |
| public MockedSingleDirectoryDbLedgerStorage(ServerConfiguration conf, LedgerManager ledgerManager, |
| LedgerDirsManager ledgerDirsManager, LedgerDirsManager indexDirsManager, StateManager stateManager, |
| CheckpointSource checkpointSource, Checkpointer checkpointer, StatsLogger statsLogger, |
| ByteBufAllocator allocator, ScheduledExecutorService gcExecutor, long writeCacheSize, |
| long readCacheSize) throws IOException { |
| super(conf, ledgerManager, ledgerDirsManager, indexDirsManager, stateManager, checkpointSource, |
| checkpointer, statsLogger, allocator, gcExecutor, writeCacheSize, readCacheSize); |
| } |
| |
| @Override |
| public void flush() throws IOException { |
| flushMutex.lock(); |
| try { |
| // Swap the write caches and block indefinitely to simulate a slow disk |
| WriteCache tmp = writeCacheBeingFlushed; |
| writeCacheBeingFlushed = writeCache; |
| writeCache = tmp; |
| |
| // since the cache is switched, we can allow flush to be triggered |
| hasFlushBeenTriggered.set(false); |
| |
| // Block the flushing thread |
| try { |
| Thread.sleep(1000); |
| } catch (InterruptedException e) { |
| Thread.currentThread().interrupt(); |
| return; |
| } |
| } finally { |
| flushMutex.unlock(); |
| } |
| } |
| } |
| } |
| |
| @Before |
| public void setup() throws Exception { |
| tmpDir = File.createTempFile("bkTest", ".dir"); |
| tmpDir.delete(); |
| tmpDir.mkdir(); |
| File curDir = BookieImpl.getCurrentDirectory(tmpDir); |
| BookieImpl.checkDirectoryStructure(curDir); |
| |
| int gcWaitTime = 1000; |
| ServerConfiguration conf = TestBKConfiguration.newServerConfiguration(); |
| conf.setGcWaitTime(gcWaitTime); |
| conf.setLedgerStorageClass(MockedDbLedgerStorage.class.getName()); |
| conf.setProperty(DbLedgerStorage.WRITE_CACHE_MAX_SIZE_MB, 1); |
| conf.setProperty(DbLedgerStorage.MAX_THROTTLE_TIME_MILLIS, 1000); |
| conf.setLedgerDirNames(new String[] { tmpDir.toString() }); |
| Bookie bookie = new BookieImpl(conf); |
| |
| storage = (DbLedgerStorage) bookie.getLedgerStorage(); |
| } |
| |
| @After |
| public void teardown() throws Exception { |
| storage.shutdown(); |
| tmpDir.delete(); |
| } |
| |
| @Test |
| public void writeCacheFull() throws Exception { |
| storage.setMasterKey(4, "key".getBytes()); |
| assertEquals(false, storage.isFenced(4)); |
| assertEquals(true, storage.ledgerExists(4)); |
| |
| assertEquals("key", new String(storage.readMasterKey(4))); |
| |
| // Add enough entries to fill the 1st write cache |
| for (int i = 0; i < 5; i++) { |
| ByteBuf entry = Unpooled.buffer(100 * 1024 + 2 * 8); |
| entry.writeLong(4); // ledger id |
| entry.writeLong(i); // entry id |
| entry.writeZero(100 * 1024); |
| storage.addEntry(entry); |
| } |
| |
| for (int i = 0; i < 5; i++) { |
| ByteBuf entry = Unpooled.buffer(100 * 1024 + 2 * 8); |
| entry.writeLong(4); // ledger id |
| entry.writeLong(5 + i); // entry id |
| entry.writeZero(100 * 1024); |
| storage.addEntry(entry); |
| } |
| |
| // Next add should fail for cache full |
| ByteBuf entry = Unpooled.buffer(100 * 1024 + 2 * 8); |
| entry.writeLong(4); // ledger id |
| entry.writeLong(22); // entry id |
| entry.writeZero(100 * 1024); |
| |
| try { |
| storage.addEntry(entry); |
| fail("Should have thrown exception"); |
| } catch (OperationRejectedException e) { |
| // Expected |
| } |
| } |
| } |