| Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
| CountingCache |
|
| 2.0;2 |
| 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.giraph.comm.aggregators; | |
| 20 | ||
| 21 | import com.google.common.collect.Maps; | |
| 22 | ||
| 23 | import java.util.Map; | |
| 24 | ||
| 25 | /** | |
| 26 | * Cache which counts the number of flushes per task id (destination worker | |
| 27 | * id), so we know how many requests were sent to the worker | |
| 28 | */ | |
| 29 | 0 | public abstract class CountingCache { |
| 30 | /** Counts the number of flushes for each worker */ | |
| 31 | 0 | private Map<Integer, Long> countMap = Maps.newHashMap(); |
| 32 | ||
| 33 | /** | |
| 34 | * Increase count of flushes for worker with desired task id. Subclasses | |
| 35 | * should call this method whenever flush is called. | |
| 36 | * | |
| 37 | * @param taskId Task id of worker | |
| 38 | */ | |
| 39 | protected void incrementCounter(Integer taskId) { | |
| 40 | 0 | Long currentCount = countMap.get(taskId); |
| 41 | 0 | countMap.put(taskId, |
| 42 | 0 | (currentCount == null) ? 1 : (currentCount + 1)); |
| 43 | 0 | } |
| 44 | ||
| 45 | /** | |
| 46 | * Get number of flushes for worker with desired task id | |
| 47 | * | |
| 48 | * @param taskId Task id of worker | |
| 49 | * @return Number of objects for the worker | |
| 50 | */ | |
| 51 | protected long getCount(Integer taskId) { | |
| 52 | 0 | Long count = countMap.get(taskId); |
| 53 | 0 | if (count == null) { |
| 54 | 0 | return 0; |
| 55 | } else { | |
| 56 | 0 | return count.longValue(); |
| 57 | } | |
| 58 | } | |
| 59 | ||
| 60 | /** | |
| 61 | * Reset the counts | |
| 62 | */ | |
| 63 | public void reset() { | |
| 64 | 0 | countMap.clear(); |
| 65 | 0 | } |
| 66 | } |