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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  class SinusoidalFileListGenerator extends StoreFileListGenerator {
28    SinusoidalFileListGenerator() {
29      super(SinusoidalFileListGenerator.class);
30    }
31  
32    @Override
33    public Iterator<List<StoreFile>> iterator() {
34  
35  
36      return new Iterator<List<StoreFile>>() {
37        private int count = 0;
38        @Override
39        public boolean hasNext() {
40          return count < MAX_FILE_GEN_ITERS;
41        }
42  
43        @Override
44        public List<StoreFile> next() {
45          count += 1;
46          ArrayList<StoreFile> files = new ArrayList<StoreFile>(NUM_FILES_GEN);
47          for (int x = 0; x < NUM_FILES_GEN; x++) {
48            int fileSize = (int) Math.abs(64 * Math.sin((Math.PI * x) / 50.0)) + 1;
49            files.add(createMockStoreFile(fileSize));
50          }
51          return files;
52        }
53  
54        @Override
55        public void remove() {
56        }
57      };
58    }
59  }