1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
|
package org.elevator;
import org.elevator.event.Event;
import org.elevator.model.Person;
import org.elevator.model.WaitingList;
import org.elevator.student.DumbElevator;
import org.elevator.system.ShadowElevator;
import java.time.LocalTime;
import java.util.*;
public class Building {
public static final int ELEVATOR_CAPACITY = 5;
public static final int MAX_FLOOR = 4;
public static final LocalTime START_TIME = LocalTime.of(6, 0, 0); // 6h 0mn 0s
public static final int MAX_PEOPLE_ARRIVING = 50;
public static final int MAX_NUMBER_OF_PEOPLE_IN_LINE = 7;
public static final float PROBABILITY_TO_SEE_A_NEW_PERSON_IN_LINE = 0.025f;
public static Random random = new Random(10L);
public static void main(String[] args) {
NavigableMap<LocalTime, Event> events = new TreeMap<>();
LocalTime time = START_TIME;
Event startEvent = new Event(Event.ELEVATOR_STARTS);
events.put(time, startEvent);
WaitingList peopleWaitingPerFloor = new WaitingList();
Elevator elevator = new DumbElevator(ELEVATOR_CAPACITY);
int totalNumberOfPeople = peopleWaitingPerFloor.countPeople();
elevator.peopleWaiting(peopleWaitingPerFloor.getLists());
ShadowElevator shadowElevator = new ShadowElevator(ELEVATOR_CAPACITY, peopleWaitingPerFloor);
printInitInfos(peopleWaitingPerFloor, totalNumberOfPeople);
while (totalNumberOfPeople < MAX_PEOPLE_ARRIVING || !shadowElevator.isStopped()) {
if (!events.containsKey(time)) {
if (totalNumberOfPeople < MAX_PEOPLE_ARRIVING) {
totalNumberOfPeople += addNewPersonToWaitingLists(time, peopleWaitingPerFloor, elevator);
if (totalNumberOfPeople == MAX_PEOPLE_ARRIVING) {
shadowElevator.lastPersonArrived();
elevator.lastPersonArrived();
}
}
time = time.plusSeconds(3);
continue;
}
Event nextEvent = events.get(time);
events.remove(time);
if (nextEvent.getName().equals(Event.ELEVATOR_STARTS)) {
Event event = Event.fromElevatorStart(time, elevator, shadowElevator);
LocalTime arrivalTime = event.getTimeOfArrivalFrom(time);
events.put(arrivalTime, event);
} else if (nextEvent.getName().equals(Event.ARRIVES_AT_FLOOR)) {
Event event = Event.fromArrivesAtFloor(time, elevator, shadowElevator);
LocalTime arrivalTime = event.getTimeOfArrivalFrom(time);
events.put(arrivalTime, event);
} else if (nextEvent.getName().equals(Event.DOOR_OPENING)) {
Event event = Event.fromDoorOpening(time, elevator, shadowElevator);
LocalTime arrivalTime = event.getTimeOfArrivalFrom(time);
events.put(arrivalTime, event);
} else if (nextEvent.getName().equals(Event.DOOR_CLOSING)) {
Event event = Event.fromDoorClosing(time, shadowElevator);
LocalTime arrivalTime = time.plus(event.getDuration());
events.put(arrivalTime, event);
} else if (nextEvent.getName().equals(Event.LOADING_FIRST_PERSON)) {
Event event = Event.fromLoadingFirstPerson(time, shadowElevator, elevator, nextEvent);
LocalTime arrivalTime = event.getTimeOfArrivalFrom(time);
events.put(arrivalTime, event);
} else if (nextEvent.getName().equals(Event.LOADING_NEXT_PERSON)) {
Event event = Event.fromLoadingNextPerson(time, shadowElevator, elevator, nextEvent);
LocalTime arrivalTime = event.getTimeOfArrivalFrom(time);
events.put(arrivalTime, event);
} else if (nextEvent.getName().equals(Event.UNLOADING_FIRST_PERSON)) {
Event event = Event.fromUnloadingFirstPerson(time, elevator, shadowElevator, nextEvent);
LocalTime arrivalTime = event.getTimeOfArrivalFrom(time);
events.put(arrivalTime, event);
} else if (nextEvent.getName().equals(Event.UNLOADING_NEXT_PERSON)) {
Event event = Event.fromUnloadingNextPerson(time, elevator, shadowElevator, nextEvent);
LocalTime arrivalTime = event.getTimeOfArrivalFrom(time);
events.put(arrivalTime, event);
} else if (nextEvent.getName().equals(Event.STAND_BY_AT_FLOOR)) {
Event event = Event.fromStandByAtFloor(time, elevator, shadowElevator);
LocalTime arrivalTime = event.getTimeOfArrivalFrom(time);
events.put(arrivalTime, event);
} else if (nextEvent.getName().equals(Event.STOPPING_AT_FLOOR)) {
shadowElevator.stopping();
}
if (totalNumberOfPeople < MAX_PEOPLE_ARRIVING) {
totalNumberOfPeople += addNewPersonToWaitingLists(time, peopleWaitingPerFloor, elevator);
if (totalNumberOfPeople == MAX_PEOPLE_ARRIVING) {
shadowElevator.lastPersonArrived();
elevator.lastPersonArrived();
}
}
time = time.plusSeconds(3);
}
peopleWaitingPerFloor.print();
shadowElevator.printPeople();
System.out.printf("[%s] Times up\n", time);
}
private static void printInitInfos(WaitingList peopleWaitingPerFloor, int totalNumberOfPeople) {
double averageNumberOfPeoplePerMinute = 1d - Math.pow(1d - PROBABILITY_TO_SEE_A_NEW_PERSON_IN_LINE, 20d);
System.out.printf("Average number of people in line per minute = %4.2f\n", averageNumberOfPeoplePerMinute);
System.out.printf("Number of people waiting = %d\n", totalNumberOfPeople);
peopleWaitingPerFloor.print();
}
private static int addNewPersonToWaitingLists(LocalTime time, WaitingList peopleWaitingPerFloor, Elevator elevator) {
Optional<Map.Entry<Integer, Person>> newPersonWaiting = peopleWaitingPerFloor.addNewPeopleToLists();
if (newPersonWaiting.isPresent()) {
int floor = newPersonWaiting.orElseThrow().getKey();
Person person = newPersonWaiting.orElseThrow().getValue();
elevator.newPersonWaitingAtFloor(floor, person);
System.out.printf("\n[%s] %s calls the elevator from floor %d to go to floor %d\n", time, person.getName(), floor, person.getDestinationFloor());
System.out.printf("Waiting list is now:\n");
peopleWaitingPerFloor.print();
return 1;
} else {
return 0;
}
}
} |
