| /** |
| * 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 java.util.ArrayList; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.concurrent.Callable; |
| import java.util.concurrent.CompletionService; |
| import java.util.concurrent.ConcurrentHashMap; |
| import java.util.concurrent.ExecutionException; |
| import java.util.concurrent.Future; |
| |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.hbase.util.Bytes; |
| import org.apache.hadoop.io.MultipleIOException; |
| import org.apache.yetus.audience.InterfaceAudience; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * Class that manages the output streams from the log splitting process. |
| * Bounded means the output streams will be no more than the size of threadpool |
| */ |
| @InterfaceAudience.Private |
| public class BoundedLogWriterCreationOutputSink extends LogRecoveredEditsOutputSink { |
| private static final Logger LOG = |
| LoggerFactory.getLogger(BoundedLogWriterCreationOutputSink.class); |
| |
| private ConcurrentHashMap<String, Long> regionRecoverStatMap = new ConcurrentHashMap<>(); |
| |
| public BoundedLogWriterCreationOutputSink(WALSplitter walSplitter, |
| WALSplitter.PipelineController controller, EntryBuffers entryBuffers, int numWriters) { |
| super(walSplitter, controller, entryBuffers, numWriters); |
| } |
| |
| @Override |
| public List<Path> finishWritingAndClose() throws IOException { |
| boolean isSuccessful; |
| List<Path> result; |
| try { |
| isSuccessful = finishWriting(false); |
| } finally { |
| result = close(); |
| } |
| if (isSuccessful) { |
| splits = result; |
| } |
| return splits; |
| } |
| |
| @Override |
| boolean executeCloseTask(CompletionService<Void> completionService, List<IOException> thrown, |
| List<Path> paths) throws InterruptedException, ExecutionException { |
| for (final Map.Entry<byte[], WALSplitter.RegionEntryBuffer> buffer : entryBuffers.buffers |
| .entrySet()) { |
| LOG.info("Submitting writeThenClose of {}", |
| Bytes.toString(buffer.getValue().encodedRegionName)); |
| completionService.submit(new Callable<Void>() { |
| @Override |
| public Void call() throws Exception { |
| Path dst = writeThenClose(buffer.getValue()); |
| paths.add(dst); |
| return null; |
| } |
| }); |
| } |
| boolean progress_failed = false; |
| for (int i = 0, n = entryBuffers.buffers.size(); i < n; i++) { |
| Future<Void> future = completionService.take(); |
| future.get(); |
| if (!progress_failed && reporter != null && !reporter.progress()) { |
| progress_failed = true; |
| } |
| } |
| |
| return progress_failed; |
| } |
| |
| /** |
| * since the splitting process may create multiple output files, we need a map |
| * regionRecoverStatMap to track the output count of each region. |
| * @return a map from encoded region ID to the number of edits written out for that region. |
| */ |
| @Override |
| public Map<byte[], Long> getOutputCounts() { |
| Map<byte[], Long> regionRecoverStatMapResult = new HashMap<>(); |
| for (Map.Entry<String, Long> entry : regionRecoverStatMap.entrySet()) { |
| regionRecoverStatMapResult.put(Bytes.toBytes(entry.getKey()), entry.getValue()); |
| } |
| return regionRecoverStatMapResult; |
| } |
| |
| /** |
| * @return the number of recovered regions |
| */ |
| @Override |
| public int getNumberOfRecoveredRegions() { |
| return regionRecoverStatMap.size(); |
| } |
| |
| /** |
| * Append the buffer to a new recovered edits file, then close it after all done |
| * @param buffer contain all entries of a certain region |
| * @throws IOException when closeWriter failed |
| */ |
| @Override |
| public void append(WALSplitter.RegionEntryBuffer buffer) throws IOException { |
| writeThenClose(buffer); |
| } |
| |
| private Path writeThenClose(WALSplitter.RegionEntryBuffer buffer) throws IOException { |
| WALSplitter.WriterAndPath wap = appendBuffer(buffer, false); |
| if (wap != null) { |
| String encodedRegionName = Bytes.toString(buffer.encodedRegionName); |
| Long value = regionRecoverStatMap.putIfAbsent(encodedRegionName, wap.editsWritten); |
| if (value != null) { |
| Long newValue = regionRecoverStatMap.get(encodedRegionName) + wap.editsWritten; |
| regionRecoverStatMap.put(encodedRegionName, newValue); |
| } |
| } |
| |
| Path dst = null; |
| List<IOException> thrown = new ArrayList<>(); |
| if (wap != null) { |
| dst = closeWriter(Bytes.toString(buffer.encodedRegionName), wap, thrown); |
| } |
| if (!thrown.isEmpty()) { |
| throw MultipleIOException.createIOException(thrown); |
| } |
| return dst; |
| } |
| } |