| /** |
| * 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.hbase.wal; |
| |
| import java.io.IOException; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.FileSystem; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.hbase.io.asyncfs.FanOutOneBlockAsyncDFSOutput; |
| import org.apache.hadoop.hbase.io.asyncfs.FanOutOneBlockAsyncDFSOutputHelper; |
| import org.apache.hadoop.hbase.io.asyncfs.FanOutOneBlockAsyncDFSOutputSaslHelper; |
| import org.apache.hadoop.hbase.regionserver.wal.AsyncFSWAL; |
| import org.apache.hadoop.hbase.regionserver.wal.AsyncProtobufLogWriter; |
| import org.apache.hadoop.hbase.regionserver.wal.WALUtil; |
| import org.apache.hadoop.hbase.util.CommonFSUtils; |
| import org.apache.hadoop.hbase.util.CommonFSUtils.StreamLacksCapabilityException; |
| import org.apache.hadoop.hbase.util.Pair; |
| import org.apache.yetus.audience.InterfaceAudience; |
| import org.apache.yetus.audience.InterfaceStability; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import org.apache.hbase.thirdparty.com.google.common.base.Throwables; |
| import org.apache.hbase.thirdparty.io.netty.channel.Channel; |
| import org.apache.hbase.thirdparty.io.netty.channel.EventLoopGroup; |
| |
| /** |
| * A WAL provider that use {@link AsyncFSWAL}. |
| */ |
| @InterfaceAudience.Private |
| @InterfaceStability.Evolving |
| public class AsyncFSWALProvider extends AbstractFSWALProvider<AsyncFSWAL> { |
| |
| private static final Logger LOG = LoggerFactory.getLogger(AsyncFSWALProvider.class); |
| |
| // Only public so classes back in regionserver.wal can access |
| public interface AsyncWriter extends WALProvider.AsyncWriter { |
| /** |
| * @throws IOException if something goes wrong initializing an output stream |
| * @throws StreamLacksCapabilityException if the given FileSystem can't provide streams that |
| * meet the needs of the given Writer implementation. |
| */ |
| void init(FileSystem fs, Path path, Configuration c, boolean overwritable, long blocksize) |
| throws IOException, CommonFSUtils.StreamLacksCapabilityException; |
| } |
| |
| private EventLoopGroup eventLoopGroup; |
| |
| private Class<? extends Channel> channelClass; |
| |
| @Override |
| protected AsyncFSWAL createWAL() throws IOException { |
| return new AsyncFSWAL(CommonFSUtils.getWALFileSystem(conf), CommonFSUtils.getWALRootDir(conf), |
| getWALDirectoryName(factory.factoryId), |
| getWALArchiveDirectoryName(conf, factory.factoryId), conf, listeners, true, logPrefix, |
| META_WAL_PROVIDER_ID.equals(providerId) ? META_WAL_PROVIDER_ID : null, |
| eventLoopGroup, channelClass); |
| } |
| |
| @Override |
| protected void doInit(Configuration conf) throws IOException { |
| Pair<EventLoopGroup, Class<? extends Channel>> eventLoopGroupAndChannelClass = |
| NettyAsyncFSWALConfigHelper.getEventLoopConfig(conf); |
| eventLoopGroup = eventLoopGroupAndChannelClass.getFirst(); |
| channelClass = eventLoopGroupAndChannelClass.getSecond(); |
| } |
| |
| /** |
| * Public because of AsyncFSWAL. Should be package-private |
| */ |
| public static AsyncWriter createAsyncWriter(Configuration conf, FileSystem fs, Path path, |
| boolean overwritable, EventLoopGroup eventLoopGroup, |
| Class<? extends Channel> channelClass) throws IOException { |
| return createAsyncWriter(conf, fs, path, overwritable, WALUtil.getWALBlockSize(conf, fs, path), |
| eventLoopGroup, channelClass); |
| } |
| |
| /** |
| * Public because of AsyncFSWAL. Should be package-private |
| */ |
| public static AsyncWriter createAsyncWriter(Configuration conf, FileSystem fs, Path path, |
| boolean overwritable, long blocksize, EventLoopGroup eventLoopGroup, |
| Class<? extends Channel> channelClass) throws IOException { |
| // Configuration already does caching for the Class lookup. |
| Class<? extends AsyncWriter> logWriterClass = conf.getClass( |
| "hbase.regionserver.hlog.async.writer.impl", AsyncProtobufLogWriter.class, AsyncWriter.class); |
| try { |
| AsyncWriter writer = logWriterClass.getConstructor(EventLoopGroup.class, Class.class) |
| .newInstance(eventLoopGroup, channelClass); |
| writer.init(fs, path, conf, overwritable, blocksize); |
| return writer; |
| } catch (Exception e) { |
| if (e instanceof CommonFSUtils.StreamLacksCapabilityException) { |
| LOG.error("The RegionServer async write ahead log provider " + |
| "relies on the ability to call " + e.getMessage() + " for proper operation during " + |
| "component failures, but the current FileSystem does not support doing so. Please " + |
| "check the config value of '" + CommonFSUtils.HBASE_WAL_DIR + "' and ensure " + |
| "it points to a FileSystem mount that has suitable capabilities for output streams."); |
| } else { |
| LOG.debug("Error instantiating log writer.", e); |
| } |
| Throwables.propagateIfPossible(e, IOException.class); |
| throw new IOException("cannot get log writer", e); |
| } |
| } |
| |
| /** |
| * Test whether we can load the helper classes for async dfs output. |
| */ |
| public static boolean load() { |
| try { |
| Class.forName(FanOutOneBlockAsyncDFSOutput.class.getName()); |
| Class.forName(FanOutOneBlockAsyncDFSOutputHelper.class.getName()); |
| Class.forName(FanOutOneBlockAsyncDFSOutputSaslHelper.class.getName()); |
| return true; |
| } catch (Throwable e) { |
| return false; |
| } |
| } |
| } |