은행 창구 관리 앱 [Step3] 이지, hong #92
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| Original file line number | Diff line number | Diff line change |
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| // | ||
| // Bank.swift | ||
| // BankManagerConsoleApp | ||
| // | ||
| // Created by dopamint on 1/31/24. | ||
| // | ||
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| import Foundation | ||
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| final class Bank { | ||
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| private var banker = Banker() | ||
| private var customerQueue = Queue<Customer>() | ||
| private let depositSemaphore: DispatchSemaphore | ||
| private let loanSemaphore: DispatchSemaphore | ||
| private let group = DispatchGroup() | ||
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| init(depositBankerCount: Int, loanBankerCount: Int) { | ||
| self.depositSemaphore = DispatchSemaphore(value: depositBankerCount) | ||
| self.loanSemaphore = DispatchSemaphore(value: loanBankerCount) | ||
| } | ||
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| func open() { | ||
| let startTime = Date() | ||
| Messages.openBank.printMessage() | ||
| let numberOfCustomers = Int.random(in: 10...30) | ||
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| print("고객 수: \(numberOfCustomers)") | ||
| setUpCustomerQueue(count: numberOfCustomers) | ||
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| while let customer = customerQueue.dequeue() { | ||
| switch customer.taskType { | ||
| case .deposit: | ||
| serveCustomer(semaphore: depositSemaphore, customer: customer) | ||
| case .loan: | ||
| serveCustomer(semaphore: loanSemaphore, customer: customer) | ||
| } | ||
| } | ||
| group.wait() | ||
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There was a problem hiding this comment. Dispatchgroup에서의 enter, leave, enotify, wait에 대해서 각각 설명해주시고 이번 프로젝트에서는 왜 wait을 사용하셔서 구현했는지 이유를 설명해주세요 There was a problem hiding this comment.
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| let endTime = Date() | ||
| let elapsedTime = endTime.timeIntervalSince(startTime).formattedDecimal | ||
| Messages.closeBank(customerCount: numberOfCustomers, totalTime: elapsedTime).printMessage() | ||
| } | ||
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| private func serveCustomer(semaphore: DispatchSemaphore, customer: Customer) { | ||
| DispatchQueue.global().async(group: group) { | ||
| semaphore.wait() | ||
| self.banker.processCustomer(customer) | ||
| semaphore.signal() | ||
| } | ||
| } | ||
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| private func setUpCustomerQueue(count: Int) { | ||
| for number in 1...count { | ||
| let customer = Customer(number: number) | ||
| customerQueue.enqueue(customer) | ||
| } | ||
| } | ||
| } | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,17 @@ | ||
| // | ||
| // Banker.swift | ||
| // BankManagerConsoleApp | ||
| // | ||
| // Created by dopamint on 1/31/24. | ||
| // | ||
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| import Foundation | ||
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| final class Banker { | ||
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| func processCustomer(_ customer: Customer) { | ||
| Messages.taskStart(number: customer.number, taskType: customer.taskType.description).printMessage() | ||
| Thread.sleep(forTimeInterval: customer.taskType.taskTime) | ||
| Messages.taskDone(number: customer.number, taskType: customer.taskType.description).printMessage() | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,16 @@ | ||
| // | ||
| // Customer.swift | ||
| // BankManagerConsoleApp | ||
| // | ||
| // Created by dopamint on 1/31/24. | ||
| // | ||
| final class Customer { | ||
| let number: Int | ||
| let taskType: TaskType | ||
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| init(number: Int) { | ||
| self.number = number | ||
| self.taskType = TaskType.random() | ||
| } | ||
| } | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,34 @@ | ||
| // | ||
| // WorkType.swift | ||
| // BankManagerConsoleApp | ||
| // | ||
| // Created by dopamint on 2/1/24. | ||
| // | ||
| enum TaskType { | ||
| case loan | ||
| case deposit | ||
| } | ||
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| extension TaskType { | ||
| var description: String { | ||
| switch self { | ||
| case .loan: | ||
| return "대출" | ||
| case .deposit: | ||
| return "예금" | ||
| } | ||
| } | ||
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| var taskTime: Double { | ||
| switch self { | ||
| case .loan: | ||
| return 1.1 | ||
| case .deposit: | ||
| return 0.7 | ||
| } | ||
| } | ||
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| static func random() -> TaskType { | ||
| return Bool.random() ? .loan : .deposit | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,12 @@ | ||
| // | ||
| // String+.swift | ||
| // BankManagerConsoleApp | ||
| // | ||
| // Created by dopamint on 1/31/24. | ||
| // | ||
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| extension Double { | ||
| var formattedDecimal: String { | ||
| return String(format: "%.2f", self) | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,41 @@ | ||
| // | ||
| // Messages.swift | ||
| // BankManagerConsoleApp | ||
| // | ||
| // Created by dopamint on 2/1/24. | ||
| // | ||
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| enum Messages { | ||
| case menu | ||
| case exit | ||
| case openBank | ||
| case taskStart(number: Int, taskType: String) | ||
| case taskDone(number: Int, taskType: String) | ||
| case closeBank(customerCount: Int, totalTime: String) | ||
| case menuError | ||
| case numberError | ||
| } | ||
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| extension Messages { | ||
| func printMessage() { | ||
| switch self { | ||
| case .menu: | ||
| print("1 : 은행계정\n2 : 종료") | ||
| print("입력 : ", terminator: "") | ||
| case .exit: | ||
| print("프로그램을 종료합니다.") | ||
| case .openBank: | ||
| print("은행 문이 열렸습니다.") | ||
| case .taskStart(let number, let taskType): | ||
| print("\(number) 고객 \(taskType)업무 시작") | ||
| case .taskDone(let number, let taskType): | ||
| print("\(number) 고객 \(taskType)업무 종료") | ||
| case .closeBank(let customerCount, let totalTime): | ||
| print("업무가 마감되었습니다. 오늘 업무를 처리한 고객은 총 \(customerCount)명 이며, 총 업무시간은 \(totalTime)초 입니다.") | ||
| case .menuError: | ||
| print("올바른 메뉴를 선택해주세요.") | ||
| case .numberError: | ||
| print("숫자를 입력해주세요.") | ||
| } | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,57 @@ | ||
| // | ||
| // LinkedList.swift | ||
| // BankManagerConsoleApp | ||
| // | ||
| // Created by yujaehong on 1/31/24. | ||
| // | ||
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| final class LinkedList<T> { | ||
| var front: Node<T>? | ||
| var rear: Node<T>? | ||
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| init(front: Node<T>? = nil, rear: Node<T>? = nil) { | ||
| self.front = front | ||
| self.rear = rear | ||
| } | ||
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| var first: T? { | ||
| return front?.value | ||
| } | ||
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| var isEmpty: Bool { | ||
| return front == nil | ||
| } | ||
| } | ||
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| extension LinkedList { | ||
| func append(_ value: T) { | ||
| let newNode = Node(value) | ||
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| if isEmpty { | ||
| front = newNode | ||
| rear = front | ||
| } else { | ||
| rear?.next = newNode | ||
| rear = newNode | ||
| } | ||
| } | ||
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| func removeFirst() -> T? { | ||
| if front === rear { | ||
| let result = front | ||
| front = nil | ||
| rear = nil | ||
| return result?.value | ||
| } | ||
| guard let currentFront = front else { return nil } | ||
| front = front?.next | ||
| return currentFront.value | ||
| } | ||
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| func removeAll() { | ||
| front = nil | ||
| rear = nil | ||
| } | ||
| } | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,15 @@ | ||
| // | ||
| // Node.swift | ||
| // BankManagerConsoleApp | ||
| // | ||
| // Created by yujaehong on 1/31/24. | ||
| // | ||
| final class Node<T> { | ||
| var value: T | ||
| var next: Node? | ||
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| init(_ value: T, _ next: Node? = nil) { | ||
| self.value = value | ||
| self.next = next | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,37 @@ | ||
| // | ||
| // Queue.swift | ||
| // BankManagerConsoleApp | ||
| // | ||
| // Created by yujaehong on 1/31/24. | ||
| // | ||
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| final class Queue<T> { | ||
| private var linkedList: LinkedList<T> | ||
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| init(linkedList: LinkedList<T> = LinkedList()) { | ||
| self.linkedList = linkedList | ||
| } | ||
| } | ||
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| extension Queue { | ||
| func enqueue(_ value: T) { | ||
| linkedList.append(value) | ||
| } | ||
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| func dequeue() -> T? { | ||
| return linkedList.removeFirst() | ||
| } | ||
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| func clear() { | ||
| linkedList.removeAll() | ||
| } | ||
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| func peek() -> T? { | ||
| return linkedList.first | ||
| } | ||
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| func isEmpty() -> Bool { | ||
| return linkedList.isEmpty | ||
| } | ||
| } |
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DispatchGroup을 Bank 타입 내부 변수로 선언해주신 이유는 무언인가요?
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작업별로 나뉘어진 메서드에서 접근하기 위해 Bank타입에 DispatchGroup를 선언했습니다.