-
Notifications
You must be signed in to change notification settings - Fork 34
/
CallCenter.java
253 lines (234 loc) · 7.95 KB
/
CallCenter.java
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
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
package callCenter;
import java.time.LocalDateTime;
import java.util.*;
import java.util.concurrent.atomic.AtomicInteger;
public class CallCenter{
public static void main(String[] args) {
CallHandler callHandler = new CallHandler();
EmployeeFactory employeeFactory = new EmployeeFactory();
List<Employee> employees = new ArrayList<>();
employees.add(employeeFactory.createEmployee(EmpType.Operator,callHandler));
employees.add(employeeFactory.createEmployee(EmpType.Operator,callHandler));
employees.add(employeeFactory.createEmployee(EmpType.Manager,callHandler));
employees.add(employeeFactory.createEmployee(EmpType.Operator,callHandler));
employees.add(employeeFactory.createEmployee(EmpType.Operator,callHandler));
employees.add(employeeFactory.createEmployee(EmpType.Manager,callHandler));
employees.add(employeeFactory.createEmployee(EmpType.Operator,callHandler));
employees.add(employeeFactory.createEmployee(EmpType.Manager,callHandler));
employees.add(employeeFactory.createEmployee(EmpType.Director,callHandler));
Thread t1 = new Thread(() -> {
for (int i = 0; i < 10; i++) {
Call call = new Call();
call.received = LocalDateTime.now();
callHandler.handleCall(call);
System.out.println("Adding a callCenter.Call");
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
});
AtomicInteger counter = new AtomicInteger();
Thread t2 = new Thread(() -> {
while (true){
if(callHandler.havePendingCalls()){
counter.set(0);
for(Employee emp : employees){
emp.getNextCall();
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
try {
counter.getAndIncrement();
Thread.sleep(500);
if(counter.intValue() > 10){
break;
}
} catch (InterruptedException e) {
e.printStackTrace();
}
}
});
t1.start();
t2.start();
}
}
class EmployeeFactory{
public Employee createEmployee(EmpType type, CallHandler callHandler){
if(type.equals(EmpType.Operator)){
return new Operator(callHandler);
}else if(type.equals(EmpType.Manager)){
return new Manager(callHandler);
}else{
return new Director(callHandler);
}
}
}
class CallHandler{
Queue<Call> operatorCall = new LinkedList<>();
Queue<Call> managerCall = new LinkedList<>();
Queue<Call> directorCall = new LinkedList<>();
public void handleCall(Call call){
System.out.println(" operatorCall = " + operatorCall);
System.out.println(" managerCall = " + managerCall);
System.out.println(" directorCall = " + directorCall);
if (call.type.equals(EmpType.Operator)){
operatorCall.add(call);
}else if (call.type.equals(EmpType.Manager)){
managerCall.add(call);
}else if (call.type.equals(EmpType.Director)){
directorCall.add(call);
}else{
throw new RuntimeException("The callCenter.Call type is invalid");
}
}
public boolean havePendingCalls(){
return !operatorCall.isEmpty() || !managerCall.isEmpty() || !directorCall.isEmpty();
}
public Call getNextCall(EmpType type){
if (type.equals(EmpType.Operator)){
return operatorCall.isEmpty() ? null : operatorCall.poll();
}else if (type.equals(EmpType.Manager)){
return managerCall.isEmpty() ? null : managerCall.poll();
}else if (type.equals(EmpType.Director)){
return directorCall.isEmpty() ? null : directorCall.poll();
}else{
throw new RuntimeException("The callCenter.Call type is invalid");
}
}
}
class Call{
EmpType type = EmpType.Operator;
CallStatus status;
LocalDateTime received;
@Override
public String toString() {
return "callCenter.Call{" +
"type=" + type +
", status=" + status +
", received=" + received +
'}';
}
}
enum EmpType {
Operator, Manager, Director;
}
enum CallStatus{
Received, In_Progress, Ended;
}
abstract class Employee{
CallHandler handler;
Random random = new Random();
Employee(CallHandler handler){
this.handler = handler;
}
void takeCall(Call call){
call.status = CallStatus.In_Progress;
receiveCall(call);
}
void endCall(Call call){
call.status = CallStatus.Ended;
getNextCall();
}
abstract void receiveCall(Call call);
abstract void getNextCall();
abstract void escalateCall(Call call);
}
class Operator extends Employee{
Operator(CallHandler handler) {
super(handler);
}
@Override
public void receiveCall(Call call){
System.out.println("callCenter.Operator: Receiving callCenter.Call.");
if (random.nextInt(10) % 2 == 0){
// When even then escalate call.
escalateCall(call);
}else{
endCall(call);
}
}
@Override
void getNextCall(){
System.out.println("callCenter.Operator: GetNext callCenter.Call.");
Call call = handler.getNextCall(EmpType.Operator);
if(call == null){
System.out.println("callCenter.Operator: I am ideal.");
}else{
receiveCall(call);
}
}
@Override
void escalateCall(Call call){
call.type = EmpType.Manager;
call.status = CallStatus.Received;
System.out.println("callCenter.Operator: Escalating callCenter.Call.");
handler.handleCall(call);
}
}
class Manager extends Employee{
Manager(CallHandler handler){
super(handler);
}
@Override
public void receiveCall(Call call){
System.out.println("callCenter.Manager: Receiving callCenter.Call.");
if (random.nextInt(10) % 2 == 0){
// When even then escalate call.
escalateCall(call);
}else{
endCall(call);
}
}
@Override
public void getNextCall(){
System.out.println("callCenter.Manager: GetNext callCenter.Call.");
Call call = handler.getNextCall(EmpType.Manager);
if(call == null){
System.out.println("callCenter.Manager: I am ideal.");
}else{
receiveCall(call);
}
}
@Override
public void escalateCall(Call call){
call.type = EmpType.Director;
call.status = CallStatus.Received;
System.out.println("callCenter.Manager: Escalating callCenter.Call.");
handler.handleCall(call);
}
}
class Director extends Employee{
Director(CallHandler handler){
super(handler);
}
@Override
public void receiveCall(Call call){
System.out.println("callCenter.Director: Receiving callCenter.Call.");
if (random.nextInt(10) % 2 == 0){
// When even then escalate call.
escalateCall(call);
}else{
endCall(call);
}
}
@Override
public void getNextCall(){
System.out.println("callCenter.Director: GetNext callCenter.Call.");
Call call = handler.getNextCall(EmpType.Director);
if(call == null){
System.out.println("callCenter.Director: I am ideal.");
}else{
receiveCall(call);
}
}
@Override
public void escalateCall(Call call){
System.out.println("callCenter.Director: I can handle all callCenter.Call.");
}
}