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1   /**
2    * Licensed to the Apache Software Foundation (ASF) under one
3    * or more contributor license agreements.  See the NOTICE file
4    * distributed with this work for additional information
5    * regarding copyright ownership.  The ASF licenses this file
6    * to you under the Apache License, Version 2.0 (the
7    * "License"); you may not use this file except in compliance
8    * with the License.  You may obtain a copy of the License at
9    *
10   *     http://www.apache.org/licenses/LICENSE-2.0
11   *
12   * Unless required by applicable law or agreed to in writing, software
13   * distributed under the License is distributed on an "AS IS" BASIS,
14   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15   * See the License for the specific language governing permissions and
16   * limitations under the License.
17   */
18  
19  package org.apache.hadoop.hbase.regionserver.compactions;
20  
21  import java.util.ArrayList;
22  import java.util.Iterator;
23  import java.util.List;
24  
25  import org.apache.hadoop.hbase.regionserver.StoreFile;
26  
27  /**
28   * Class to generate several lists of StoreFiles that are all the same size.
29   */
30  class ConstantSizeFileListGenerator extends StoreFileListGenerator {
31  
32    /** How many mb's mock storefiles should be. */
33    private static final int FILESIZE = 5;
34  
35    ConstantSizeFileListGenerator() {
36      super(ConstantSizeFileListGenerator.class);
37    }
38  
39    @Override
40    public final Iterator<List<StoreFile>> iterator() {
41      return new Iterator<List<StoreFile>>() {
42        private int count = 0;
43  
44        @Override
45        public boolean hasNext() {
46          return count < MAX_FILE_GEN_ITERS;
47        }
48  
49        @Override
50        public List<StoreFile> next() {
51          count += 1;
52          ArrayList<StoreFile> files = new ArrayList<StoreFile>(NUM_FILES_GEN);
53          for (int i = 0; i < NUM_FILES_GEN; i++) {
54            files.add(createMockStoreFile(FILESIZE));
55          }
56          return files;
57        }
58  
59        @Override
60        public void remove() {
61  
62        }
63      };
64    }
65  }