質問編集履歴
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コードにコメントを追加
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@@ -214,7 +214,7 @@
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if (entity == null) return;
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await DomainService.HeavyWork(entity);
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await DomainService.HeavyWork(entity); // 他のUseCaseが呼ばれるとエラー
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DataUpdated?.Invoke(this, EventArgs.Empty);
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コードの例の追加
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@@ -39,3 +39,295 @@
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重い処理（タスク）を管理する仕組みがあるのではないかと思うのですが、
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そういった仕組みを作って解決するべきでしょうか。
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####### 追記
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コードの例です。WPFなのでViewModelでBindingを行っていますが、質問の部分はInteractorの各UseCaseです。
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例のためTask.Delayを使っていますが、ProcUseCaseを呼び出した直後にLoadUseCaseを呼び出すとエラーになります。
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各UseCaseを排他的に呼び出す処理をInteractorに持たせるか、もしくは非同期な処理を管理するクラスを作るか、
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このあたりの設計が分からず悩んでいます。
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書いていて思ったのですが後者のほうが簡単かもしれません…
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```C#
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using System;
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using System.Threading.Tasks;
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using System.Windows;
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namespace WpfArchTestApp
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{
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internal class Entity
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{
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public string Data
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{
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get { return disposed ? throw new ObjectDisposedException("Entity") : data; }
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set { data = value; }
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}
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private string data;
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private bool disposed = false;
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public void Dispose() { disposed = true; }
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}
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internal class Repository
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{
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public async Task<Entity> Load()
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{
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await Task.Delay(1000);
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return new Entity { Data = "TestStringData" };
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}
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public async Task Save(Entity _)
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{
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await Task.Delay(1000);
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}
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}
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internal class DomainService
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{
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public static async Task HeavyWork(Entity entity)
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{
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for (int i = 0; i < entity.Data.Length; ++i)
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{
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for (int j = 0; j < entity.Data.Length; ++j)
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{
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if (entity.Data[i] >= entity.Data[j]) continue;
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char[] charArray = entity.Data.ToCharArray();
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charArray[j] = entity.Data[i];
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charArray[i] = entity.Data[j];
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entity.Data = new string(charArray);
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await Task.Delay(20);
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}
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}
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}
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}
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internal class Interactor
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{
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public event EventHandler DataUpdated;
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public string Data { get { return entity == null ? "" : entity.Data; } }
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private readonly Repository repository;
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private Entity entity;
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public Interactor(Repository repository)
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{
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this.repository = repository;
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}
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public async void LoadUseCase()
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{
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if (entity != null)
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{
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entity.Dispose();
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entity = null;
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}
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entity = await repository.Load();
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DataUpdated?.Invoke(this, EventArgs.Empty);
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}
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public async void ProcUseCase()
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{
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if (entity == null) return;
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await DomainService.HeavyWork(entity);
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DataUpdated?.Invoke(this, EventArgs.Empty);
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}
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public async void SaveUseCase()
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{
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if (entity == null) return;
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await repository.Save(entity);
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entity.Dispose();
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entity = null;
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DataUpdated?.Invoke(this, EventArgs.Empty);
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}
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}
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internal class MainWindowViewModel : VMCommon.ViewModelBase
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{
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public VMCommon.DelegateCommand LoadCommand { get; }
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public VMCommon.DelegateCommand ProcCommand { get; }
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public VMCommon.DelegateCommand SaveCommand { get; }
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public string Data
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{
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get { return data; }
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private set
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{
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if (data == value) return;
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data = value;
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RaiseProeprtyChanged();
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}
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}
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private readonly Interactor interactor;
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private string data;
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public MainWindowViewModel()
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{
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Repository repository = new Repository();
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interactor = new Interactor(repository);
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LoadCommand = new VMCommon.DelegateCommand(_ => interactor.LoadUseCase());
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ProcCommand = new VMCommon.DelegateCommand(_ => interactor.ProcUseCase());
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SaveCommand = new VMCommon.DelegateCommand(_ => interactor.SaveUseCase());
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interactor.DataUpdated += Interactor_DataUpdated;
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}
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private void Interactor_DataUpdated(object sender, EventArgs e)
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{
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Data = interactor.Data;
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}
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}
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public partial class MainWindow : Window
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316
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{
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318
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319
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public MainWindow()
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320
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321
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{
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322
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InitializeComponent();
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DataContext = new MainWindowViewModel();
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}
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328
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}
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330
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331
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}
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332
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333
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+
```
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