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;
023
024import org.apache.hadoop.hbase.regionserver.HStoreFile;
025
026/**
027 * Class to generate several lists of StoreFiles that are all the same size.
028 */
029class ConstantSizeFileListGenerator extends StoreFileListGenerator {
030
031  /** How many mb's mock storefiles should be. */
032  private static final int FILESIZE = 5;
033
034  ConstantSizeFileListGenerator() {
035    super(ConstantSizeFileListGenerator.class);
036  }
037
038  @Override
039  public final Iterator<List<HStoreFile>> iterator() {
040    return new Iterator<List<HStoreFile>>() {
041      private int count = 0;
042
043      @Override
044      public boolean hasNext() {
045        return count < MAX_FILE_GEN_ITERS;
046      }
047
048      @Override
049      public List<HStoreFile> next() {
050        count += 1;
051        ArrayList<HStoreFile> files = new ArrayList<>(NUM_FILES_GEN);
052        for (int i = 0; i < NUM_FILES_GEN; i++) {
053          files.add(createMockStoreFile(FILESIZE));
054        }
055        return files;
056      }
057
058      @Override
059      public void remove() {
060
061      }
062    };
063  }
064}