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