001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018package org.apache.hadoop.hbase.regionserver;
019
020import java.io.IOException;
021import java.util.Collection;
022import java.util.List;
023import java.util.Map;
024import java.util.NavigableMap;
025import java.util.TreeMap;
026import org.apache.hadoop.hbase.Cell;
027import org.apache.yetus.audience.InterfaceAudience;
028
029/**
030 * class for cell sink that separates the provided cells into multiple files for date tiered
031 * compaction.
032 */
033@InterfaceAudience.Private
034public class DateTieredMultiFileWriter extends AbstractMultiFileWriter {
035
036  private final NavigableMap<Long, StoreFileWriter> lowerBoundary2Writer = new TreeMap<>();
037
038  private final boolean needEmptyFile;
039
040  private final Map<Long, String> lowerBoundariesPolicies;
041
042  /**
043   * @param lowerBoundariesPolicies each window to storage policy map.
044   * @param needEmptyFile           whether need to create an empty store file if we haven't written
045   *                                out anything.
046   */
047  public DateTieredMultiFileWriter(List<Long> lowerBoundaries,
048    Map<Long, String> lowerBoundariesPolicies, boolean needEmptyFile) {
049    for (Long lowerBoundary : lowerBoundaries) {
050      lowerBoundary2Writer.put(lowerBoundary, null);
051    }
052    this.needEmptyFile = needEmptyFile;
053    this.lowerBoundariesPolicies = lowerBoundariesPolicies;
054  }
055
056  @Override
057  public void append(Cell cell) throws IOException {
058    Map.Entry<Long, StoreFileWriter> entry = lowerBoundary2Writer.floorEntry(cell.getTimestamp());
059    StoreFileWriter writer = entry.getValue();
060    if (writer == null) {
061      String lowerBoundaryStoragePolicy = lowerBoundariesPolicies.get(entry.getKey());
062      if (lowerBoundaryStoragePolicy != null) {
063        writer = writerFactory.createWriterWithStoragePolicy(lowerBoundaryStoragePolicy);
064      } else {
065        writer = writerFactory.createWriter();
066      }
067      lowerBoundary2Writer.put(entry.getKey(), writer);
068    }
069    writer.append(cell);
070  }
071
072  @Override
073  protected Collection<StoreFileWriter> writers() {
074    return lowerBoundary2Writer.values();
075  }
076
077  @Override
078  protected void preCommitWriters() throws IOException {
079    if (!needEmptyFile) {
080      return;
081    }
082    for (StoreFileWriter writer : lowerBoundary2Writer.values()) {
083      if (writer != null) {
084        return;
085      }
086    }
087    // we haven't written out any data, create an empty file to retain metadata
088    lowerBoundary2Writer.put(lowerBoundary2Writer.firstKey(), writerFactory.createWriter());
089  }
090}