[2] | 1 | #region License Information
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| 2 | /* HeuristicLab
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| 3 | * Copyright (C) 2002-2008 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
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| 4 | *
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| 5 | * This file is part of HeuristicLab.
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| 6 | *
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| 7 | * HeuristicLab is free software: you can redistribute it and/or modify
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| 8 | * it under the terms of the GNU General Public License as published by
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| 9 | * the Free Software Foundation, either version 3 of the License, or
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| 10 | * (at your option) any later version.
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| 11 | *
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| 12 | * HeuristicLab is distributed in the hope that it will be useful,
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| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 15 | * GNU General Public License for more details.
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| 16 | *
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| 17 | * You should have received a copy of the GNU General Public License
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| 18 | * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
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| 19 | */
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| 20 | #endregion
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| 21 |
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| 22 | using System;
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| 23 | using System.Collections.Generic;
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| 24 | using System.Text;
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| 25 | using System.Threading;
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| 26 | using System.ServiceModel;
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| 27 |
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| 28 | namespace HeuristicLab.Grid {
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| 29 | [ServiceBehavior(InstanceContextMode = InstanceContextMode.Single, ConcurrencyMode = ConcurrencyMode.Multiple, UseSynchronizationContext=false)]
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| 30 | public class EngineStore : IEngineStore {
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| 31 | private Queue<Guid> engineQueue;
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| 32 | private Dictionary<Guid, byte[]> waitingEngines;
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| 33 | private Dictionary<Guid, byte[]> runningEngines;
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| 34 | private Dictionary<Guid, byte[]> results;
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| 35 | private object bigLock;
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| 36 |
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| 37 | private event EventHandler ResultRecieved;
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| 38 |
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| 39 | public int WaitingJobs {
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| 40 | get {
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| 41 | return waitingEngines.Count;
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| 42 | }
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| 43 | }
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| 44 |
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| 45 | public int RunningJobs {
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| 46 | get {
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| 47 | return runningEngines.Count;
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| 48 | }
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| 49 | }
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| 50 |
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| 51 | public int WaitingResults {
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| 52 | get {
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| 53 | return results.Count;
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| 54 | }
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| 55 | }
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| 56 |
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| 57 | public EngineStore() {
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| 58 | engineQueue = new Queue<Guid>();
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| 59 | waitingEngines = new Dictionary<Guid, byte[]>();
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| 60 | runningEngines = new Dictionary<Guid, byte[]>();
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| 61 | results = new Dictionary<Guid, byte[]>();
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| 62 | bigLock = new object();
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| 63 | }
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| 64 |
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| 65 | public bool TryTakeEngine(out Guid guid, out byte[] engine) {
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| 66 | lock (bigLock) {
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| 67 | if (engineQueue.Count == 0) {
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| 68 | guid = Guid.Empty;
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| 69 | engine = null;
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| 70 | return false;
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| 71 | } else {
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| 72 | guid = engineQueue.Dequeue();
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| 73 | engine = waitingEngines[guid];
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| 74 | waitingEngines.Remove(guid);
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| 75 | runningEngines[guid] = engine;
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| 76 | return true;
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| 77 | }
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| 78 | }
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| 79 | }
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| 80 |
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| 81 | public void StoreResult(Guid guid, byte[] result) {
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| 82 | lock (bigLock) {
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| 83 | if (!runningEngines.ContainsKey(guid)) return; // ignore result when the engine is not known to be running
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| 84 |
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| 85 | runningEngines.Remove(guid);
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| 86 | results[guid] = result;
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| 87 | OnResultRecieved(guid);
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| 88 | }
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| 89 | }
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| 90 |
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| 91 | internal void AddEngine(Guid guid, byte[] engine) {
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| 92 | lock (bigLock) {
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| 93 | engineQueue.Enqueue(guid);
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| 94 | waitingEngines.Add(guid, engine);
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| 95 | }
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| 96 | }
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| 97 |
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| 98 | internal byte[] RemoveResult(Guid guid) {
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| 99 | lock (bigLock) {
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| 100 | byte[] result = results[guid];
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| 101 | results.Remove(guid);
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| 102 | return result;
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| 103 | }
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| 104 | }
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| 105 |
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| 106 | internal byte[] GetResult(Guid guid) {
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| 107 | ManualResetEvent waitHandle = new ManualResetEvent(false);
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| 108 | lock (bigLock) {
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| 109 | if (results.ContainsKey(guid)) {
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| 110 | byte[] result = results[guid];
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| 111 | results.Remove(guid);
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| 112 | return result;
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| 113 | } else {
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| 114 | ResultRecieved += delegate(object source, EventArgs args) {
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| 115 | ResultRecievedEventArgs resultArgs = (ResultRecievedEventArgs)args;
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| 116 | if (resultArgs.resultGuid == guid) {
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| 117 | waitHandle.Set();
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| 118 | }
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| 119 | };
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| 120 | }
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| 121 | }
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| 122 |
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| 123 | waitHandle.WaitOne();
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| 124 | waitHandle.Close();
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| 125 |
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| 126 | lock (bigLock) {
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| 127 | byte[] result = results[guid];
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| 128 | results.Remove(guid);
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| 129 | return result;
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| 130 | }
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| 131 | }
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| 132 |
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| 133 | private void OnResultRecieved(Guid guid) {
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| 134 | ResultRecievedEventArgs args = new ResultRecievedEventArgs();
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| 135 | args.resultGuid = guid;
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| 136 | if (ResultRecieved != null) {
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| 137 | ResultRecieved(this, args);
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| 138 | }
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| 139 | }
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| 140 |
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| 141 | private class ResultRecievedEventArgs : EventArgs {
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| 142 | public Guid resultGuid;
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| 143 | }
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| 144 | }
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| 145 | }
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