| /** |
| * |
| * 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.regionserver; |
| |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.hadoop.hbase.classification.InterfaceAudience; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.hbase.monitoring.MonitoredTask; |
| import org.apache.hadoop.hbase.regionserver.throttle.ThroughputController; |
| import org.apache.hadoop.util.StringUtils; |
| |
| /** |
| * Default implementation of StoreFlusher. |
| */ |
| @InterfaceAudience.Private |
| public class DefaultStoreFlusher extends StoreFlusher { |
| private static final Log LOG = LogFactory.getLog(DefaultStoreFlusher.class); |
| private final Object flushLock = new Object(); |
| |
| public DefaultStoreFlusher(Configuration conf, Store store) { |
| super(conf, store); |
| } |
| |
| @Override |
| public List<Path> flushSnapshot(MemStoreSnapshot snapshot, long cacheFlushId, |
| MonitoredTask status, ThroughputController throughputController) throws IOException { |
| ArrayList<Path> result = new ArrayList<Path>(); |
| int cellsCount = snapshot.getCellsCount(); |
| if (cellsCount == 0) return result; // don't flush if there are no entries |
| |
| // Use a store scanner to find which rows to flush. |
| long smallestReadPoint = store.getSmallestReadPoint(); |
| InternalScanner scanner = createScanner(snapshot.getScanner(), smallestReadPoint); |
| if (scanner == null) { |
| return result; // NULL scanner returned from coprocessor hooks means skip normal processing |
| } |
| |
| StoreFileWriter writer; |
| try { |
| // TODO: We can fail in the below block before we complete adding this flush to |
| // list of store files. Add cleanup of anything put on filesystem if we fail. |
| synchronized (flushLock) { |
| status.setStatus("Flushing " + store + ": creating writer"); |
| // Write the map out to the disk |
| writer = store.createWriterInTmp(cellsCount, store.getFamily().getCompressionType(), |
| /* isCompaction = */ false, |
| /* includeMVCCReadpoint = */ true, |
| /* includesTags = */ snapshot.isTagsPresent(), |
| /* shouldDropBehind = */ false, |
| snapshot.getTimeRangeTracker()); |
| IOException e = null; |
| try { |
| performFlush(scanner, writer, smallestReadPoint, throughputController); |
| } catch (IOException ioe) { |
| e = ioe; |
| // throw the exception out |
| throw ioe; |
| } finally { |
| if (e != null) { |
| writer.close(); |
| } else { |
| finalizeWriter(writer, cacheFlushId, status); |
| } |
| } |
| } |
| } finally { |
| scanner.close(); |
| } |
| LOG.info("Flushed, sequenceid=" + cacheFlushId +", memsize=" |
| + StringUtils.TraditionalBinaryPrefix.long2String(snapshot.getSize(), "", 1) + |
| ", hasBloomFilter=" + writer.hasGeneralBloom() + |
| ", into tmp file " + writer.getPath()); |
| result.add(writer.getPath()); |
| return result; |
| } |
| } |