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.compactions;
019
020import java.util.ArrayList;
021import java.util.Iterator;
022import java.util.List;
023import org.apache.hadoop.hbase.regionserver.HStoreFile;
024
025/**
026 * Class to generate several lists of StoreFiles that are all the same size.
027 */
028class ConstantSizeFileListGenerator extends StoreFileListGenerator {
029
030  /** How many mb's mock storefiles should be. */
031  private static final int FILESIZE = 5;
032
033  @Override
034  public final Iterator<List<HStoreFile>> iterator() {
035    return new Iterator<List<HStoreFile>>() {
036      private int count = 0;
037
038      @Override
039      public boolean hasNext() {
040        return count < MAX_FILE_GEN_ITERS;
041      }
042
043      @Override
044      public List<HStoreFile> next() {
045        count += 1;
046        ArrayList<HStoreFile> files = new ArrayList<>(NUM_FILES_GEN);
047        for (int i = 0; i < NUM_FILES_GEN; i++) {
048          files.add(createMockStoreFile(FILESIZE));
049        }
050        return files;
051      }
052
053      @Override
054      public void remove() {
055
056      }
057    };
058  }
059
060}