| Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
| AllWorkersInfo |
|
| 0.0;0 |
| 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 | package org.apache.giraph.worker; | |
| 19 | ||
| 20 | import java.util.ArrayList; | |
| 21 | import java.util.List; | |
| 22 | ||
| 23 | import com.google.common.base.Preconditions; | |
| 24 | ||
| 25 | import it.unimi.dsi.fastutil.ints.Int2IntOpenHashMap; | |
| 26 | ||
| 27 | /** | |
| 28 | * Information about all workers, their WorkerInfo values, and indices. | |
| 29 | */ | |
| 30 | public class AllWorkersInfo { | |
| 31 | /** List of workers in current superstep, sorted by task id */ | |
| 32 | private final List<WorkerInfo> workerInfos; | |
| 33 | /** My worker index */ | |
| 34 | private final int myWorkerIndex; | |
| 35 | /** Map of taskId to worker index */ | |
| 36 | private final Int2IntOpenHashMap taskIdToIndex; | |
| 37 | ||
| 38 | /** | |
| 39 | * Constructor | |
| 40 | * @param workers Ordered list of workers | |
| 41 | * @param myWorker My worker | |
| 42 | */ | |
| 43 | 0 | public AllWorkersInfo(List<WorkerInfo> workers, WorkerInfo myWorker) { |
| 44 | 0 | workerInfos = new ArrayList<>(workers); |
| 45 | ||
| 46 | 0 | taskIdToIndex = new Int2IntOpenHashMap(workerInfos.size()); |
| 47 | 0 | taskIdToIndex.defaultReturnValue(-1); |
| 48 | 0 | for (int i = 0; i < workerInfos.size(); i++) { |
| 49 | 0 | int task = workerInfos.get(i).getTaskId(); |
| 50 | 0 | if (i > 0) { |
| 51 | 0 | Preconditions.checkState( |
| 52 | 0 | task > workerInfos.get(i - 1).getTaskId(), "Tasks not ordered"); |
| 53 | } | |
| 54 | 0 | Preconditions.checkState(task >= 0, "Task not specified, %d", task); |
| 55 | 0 | int old = taskIdToIndex.put(task, i); |
| 56 | 0 | Preconditions.checkState(old == -1, |
| 57 | "Task with %d id found twice (positions %d and %d)", | |
| 58 | 0 | task, i, old); |
| 59 | } | |
| 60 | ||
| 61 | 0 | myWorkerIndex = getWorkerIndex(myWorker); |
| 62 | 0 | } |
| 63 | ||
| 64 | /** | |
| 65 | * List of WorkerInfos | |
| 66 | * | |
| 67 | * @return List of WorkerInfos | |
| 68 | */ | |
| 69 | public List<WorkerInfo> getWorkerList() { | |
| 70 | 0 | return workerInfos; |
| 71 | } | |
| 72 | ||
| 73 | /** | |
| 74 | * Get number of workers | |
| 75 | * | |
| 76 | * @return Number of workers | |
| 77 | */ | |
| 78 | public int getWorkerCount() { | |
| 79 | 0 | return workerInfos.size(); |
| 80 | } | |
| 81 | ||
| 82 | /** | |
| 83 | * Get index for this worker | |
| 84 | * | |
| 85 | * @return Index of this worker | |
| 86 | */ | |
| 87 | public int getMyWorkerIndex() { | |
| 88 | 0 | return myWorkerIndex; |
| 89 | } | |
| 90 | ||
| 91 | /** | |
| 92 | * For every worker this method returns unique number | |
| 93 | * between 0 and N, where N is the total number of workers. | |
| 94 | * This number stays the same throughout the computation. | |
| 95 | * TaskID may be different from this number and task ID | |
| 96 | * is not necessarily continuous | |
| 97 | * @param workerInfo worker info object | |
| 98 | * @return worker number | |
| 99 | */ | |
| 100 | public int getWorkerIndex(WorkerInfo workerInfo) { | |
| 101 | 0 | return taskIdToIndex.get(workerInfo.getTaskId()); |
| 102 | } | |
| 103 | } |