1 | #region License Information
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2 | /*
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3 | * This file is part of SimSharp which is licensed under the MIT license.
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4 | * See the LICENSE file in the project root for more information.
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5 | */
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6 | #endregion
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7 |
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8 | using System;
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9 | using System.Collections.Generic;
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10 | using System.Linq;
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11 |
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12 | namespace SimSharp {
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13 | /// <summary>
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14 | /// A filter store is similar to a <see cref="Store"/>.
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15 | /// However, in Get it is possible to specify the property of the item wished to retrieve.
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16 | ///
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17 | /// FilterStore holds a variable number of individual items.
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18 | /// Put are always performed in FIFO order.
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19 | /// Get are performed in FIFO order only when they match at least one item in the store.
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20 | /// </summary>
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21 | public class FilterStore {
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22 | protected static readonly Func<object, bool> TrueFunc = _ => true;
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23 |
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24 | public int Capacity { get; protected set; }
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25 |
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26 | public int Count { get { return Items.Count; } }
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27 |
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28 | protected Simulation Environment { get; private set; }
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29 |
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30 | protected Queue<StorePut> PutQueue { get; private set; }
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31 | protected LinkedList<FilterStoreGet> GetQueue { get; private set; }
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32 | protected List<StoreItem> Items { get; private set; }
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33 | protected List<Event> WhenNewQueue { get; private set; }
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34 | protected List<Event> WhenAnyQueue { get; private set; }
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35 | protected List<Event> WhenFullQueue { get; private set; }
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36 | protected List<Event> WhenEmptyQueue { get; private set; }
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37 | protected List<Event> WhenChangeQueue { get; private set; }
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38 |
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39 | public ITimeSeriesMonitor Utilization { get; set; }
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40 | public ITimeSeriesMonitor WIP { get; set; }
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41 | public ISampleMonitor LeadTime { get; set; }
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42 | public ITimeSeriesMonitor PutQueueLength { get; set; }
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43 | public ISampleMonitor PutWaitingTime { get; set; }
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44 | public ITimeSeriesMonitor GetQueueLength { get; set; }
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45 | public ISampleMonitor GetWaitingTime { get; set; }
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46 |
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47 | public FilterStore(Simulation environment, int capacity = int.MaxValue) {
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48 | if (capacity <= 0) throw new ArgumentException("Capacity must be > 0", "capacity");
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49 | Environment = environment;
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50 | Capacity = capacity;
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51 | PutQueue = new Queue<StorePut>();
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52 | GetQueue = new LinkedList<FilterStoreGet>();
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53 | Items = new List<StoreItem>();
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54 | WhenNewQueue = new List<Event>();
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55 | WhenAnyQueue = new List<Event>();
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56 | WhenFullQueue = new List<Event>();
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57 | WhenEmptyQueue = new List<Event>();
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58 | WhenChangeQueue = new List<Event>();
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59 | }
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60 | public FilterStore(Simulation environment, IEnumerable<object> items, int capacity = int.MaxValue) {
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61 | if (capacity <= 0) throw new ArgumentException("Capacity must be > 0", "capacity");
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62 | Environment = environment;
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63 | Capacity = capacity;
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64 | PutQueue = new Queue<StorePut>();
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65 | GetQueue = new LinkedList<FilterStoreGet>();
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66 | Items = new List<StoreItem>(items.Select(x => new StoreItem() { AdmissionDate = Environment.Now, Item = x }));
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67 | WhenNewQueue = new List<Event>();
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68 | WhenAnyQueue = new List<Event>();
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69 | WhenFullQueue = new List<Event>();
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70 | WhenEmptyQueue = new List<Event>();
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71 | WhenChangeQueue = new List<Event>();
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72 | if (capacity < Items.Count) throw new ArgumentException("There are more initial items than there is capacity.", "items");
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73 | }
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74 |
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75 | public virtual bool IsAvailable(Func<object, bool> filter) {
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76 | return Items.Select(x => x.Item).Any(filter);
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77 | }
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78 |
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79 | public virtual StorePut Put(object item) {
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80 | var put = new StorePut(Environment, TriggerGet, item);
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81 | PutQueue.Enqueue(put);
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82 | TriggerPut();
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83 | return put;
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84 | }
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85 |
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86 | public virtual FilterStoreGet Get(Func<object, bool> filter = null) {
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87 | var get = new FilterStoreGet(Environment, TriggerPut, filter ?? TrueFunc);
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88 | GetQueue.AddLast(get);
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89 | TriggerGet();
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90 | return get;
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91 | }
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92 |
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93 | public virtual Event WhenNew() {
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94 | var whenNew = new Event(Environment);
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95 | WhenNewQueue.Add(whenNew);
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96 | return whenNew;
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97 | }
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98 |
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99 | public virtual Event WhenAny() {
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100 | var whenAny = new Event(Environment);
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101 | WhenAnyQueue.Add(whenAny);
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102 | TriggerWhenAny();
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103 | return whenAny;
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104 | }
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105 |
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106 | public virtual Event WhenFull() {
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107 | var whenFull = new Event(Environment);
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108 | WhenFullQueue.Add(whenFull);
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109 | TriggerWhenFull();
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110 | return whenFull;
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111 | }
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112 |
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113 | public virtual Event WhenEmpty() {
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114 | var whenEmpty = new Event(Environment);
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115 | WhenEmptyQueue.Add(whenEmpty);
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116 | TriggerWhenEmpty();
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117 | return whenEmpty;
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118 | }
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119 |
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120 | public virtual Event WhenChange() {
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121 | var whenChange = new Event(Environment);
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122 | WhenChangeQueue.Add(whenChange);
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123 | return whenChange;
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124 | }
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125 |
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126 | protected virtual void DoPut(StorePut put) {
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127 | if (Items.Count < Capacity) {
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128 | PutWaitingTime?.Add(Environment.ToDouble(Environment.Now - put.Time));
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129 | Items.Add(new StoreItem() { AdmissionDate = Environment.Now, Item = put.Value });
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130 | put.Succeed();
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131 | }
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132 | }
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133 |
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134 | protected virtual void DoGet(FilterStoreGet get) {
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135 | for (int i = 0; i < Items.Count; i++) {
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136 | var item = Items[i];
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137 | if (!get.Filter(item.Item)) continue;
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138 | GetWaitingTime?.Add(Environment.ToDouble(Environment.Now - get.Time));
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139 | LeadTime?.Add(Environment.ToDouble(Environment.Now - item.AdmissionDate));
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140 | Items.RemoveAt(i);
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141 | get.Succeed(item.Item);
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142 | return;
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143 | }
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144 | }
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145 |
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146 | protected virtual void TriggerPut(Event @event = null) {
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147 | while (PutQueue.Count > 0) {
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148 | var put = PutQueue.Peek();
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149 | DoPut(put);
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150 | if (put.IsTriggered) {
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151 | PutQueue.Dequeue();
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152 | TriggerWhenNew();
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153 | TriggerWhenAny();
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154 | TriggerWhenFull();
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155 | TriggerWhenChange();
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156 | } else break;
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157 | }
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158 | Utilization?.UpdateTo(Count / (double)Capacity);
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159 | WIP?.UpdateTo(Count + PutQueue.Count + GetQueue.Count);
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160 | PutQueueLength?.UpdateTo(PutQueue.Count);
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161 | }
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162 |
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163 | protected virtual void TriggerGet(Event @event = null) {
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164 | var current = GetQueue.First;
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165 | while (current != null) {
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166 | var get = current.Value;
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167 | DoGet(get);
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168 | if (get.IsTriggered) {
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169 | var next = current.Next;
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170 | GetQueue.Remove(current);
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171 | current = next;
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172 | TriggerWhenEmpty();
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173 | TriggerWhenChange();
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174 | } else current = current.Next;
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175 | if (Items.Count == 0) break;
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176 | }
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177 | Utilization?.UpdateTo(Count / (double)Capacity);
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178 | WIP?.UpdateTo(Count + PutQueue.Count + GetQueue.Count);
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179 | GetQueueLength?.UpdateTo(GetQueue.Count);
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180 | }
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181 |
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182 | protected virtual void TriggerWhenNew() {
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183 | if (WhenNewQueue.Count == 0) return;
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184 | foreach (var evt in WhenNewQueue)
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185 | evt.Succeed();
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186 | WhenNewQueue.Clear();
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187 | }
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188 |
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189 | protected virtual void TriggerWhenAny() {
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190 | if (Items.Count > 0) {
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191 | if (WhenAnyQueue.Count == 0) return;
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192 | foreach (var evt in WhenAnyQueue)
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193 | evt.Succeed();
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194 | WhenAnyQueue.Clear();
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195 | }
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196 | }
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197 |
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198 | protected virtual void TriggerWhenFull() {
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199 | if (Count == Capacity) {
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200 | if (WhenFullQueue.Count == 0) return;
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201 | foreach (var evt in WhenFullQueue)
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202 | evt.Succeed();
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203 | WhenFullQueue.Clear();
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204 | }
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205 | }
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206 |
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207 | protected virtual void TriggerWhenEmpty() {
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208 | if (Count == 0) {
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209 | if (WhenEmptyQueue.Count == 0) return;
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210 | foreach (var evt in WhenEmptyQueue)
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211 | evt.Succeed();
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212 | WhenEmptyQueue.Clear();
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213 | }
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214 | }
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215 |
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216 | protected virtual void TriggerWhenChange() {
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217 | if (WhenChangeQueue.Count == 0) return;
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218 | foreach (var evt in WhenChangeQueue)
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219 | evt.Succeed();
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220 | WhenChangeQueue.Clear();
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221 | }
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222 | }
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223 | }
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