Skip to content

Commit

Permalink
Adds an optional fatal error handler configuration to the Hosted serv…
Browse files Browse the repository at this point in the history 
…ice (#36)
  • Loading branch information
@michaelpduda
michaelpduda authored Sep 5, 2024
2 parents 3ed50bf + db6c5cf commit d262ae2
Show file tree
Hide file tree
Showing 8 changed files with 300 additions and 132 deletions.
15 changes: 15 additions & 0 deletions samples/HostedUpbeatUISample/App.xaml.cs
View file
Original file line number Diff line number Diff line change
Expand Up @@ -37,6 +37,21 @@ await Host.CreateDefaultBuilder(e?.Args ?? Array.Empty<string>()) // Use the .NE
WindowStartupLocation = WindowStartupLocation.CenterScreen,
ModalBackground = new SolidColorBrush(Brushes.LightGray.Color) { Opacity = 0.5 }, // The brush to display underneath the top View.
ModalBlurEffect = new BlurEffect() { Radius = 10.0, KernelType = KernelType.Gaussian }, // The blur effect to apply to Views that are not on top. This is optional, as blur effects can significantly impact performance.
})
.SetFatalErrorHandler(e =>
{
if (MessageBox.Show(
$"Error message: {e.Message}. See stack trace?",
"Fatal Error",
MessageBoxButton.YesNo,
MessageBoxImage.Error) == MessageBoxResult.Yes)
{
_ = MessageBox.Show(
e.StackTrace,
"Fatal Error",
MessageBoxButton.OK,
MessageBoxImage.None);
}
}))
.Build()
.RunAsync().ConfigureAwait(true);
Expand Down
4 changes: 2 additions & 2 deletions samples/HostedUpbeatUISample/HostedUpbeatUISample.csproj
View file
Original file line number Diff line number Diff line change
Expand Up @@ -17,13 +17,13 @@
Version="8.2.*" />
<PackageReference
Include="Microsoft.Extensions.Hosting"
Version="3.1.9" />
Version="7.0.1" />
</ItemGroup>

<ItemGroup>
<PackageReference
Include="UpbeatUI.Extensions.Hosting"
Version="4.2.0" />
Version="5.0.0-rc2" />
<!-- Switch from the PackageReference to the ProjectReference to test local UpbeatUI changes in the samples. -->
<!-- <ProjectReference Include="..\..\source\UpbeatUI.Extensions.Hosting\UpbeatUI.Extensions.Hosting.csproj" /> -->
</ItemGroup>
Expand Down
159 changes: 98 additions & 61 deletions samples/ManualUpbeatUISample/App.xaml.cs
View file
Original file line number Diff line number Diff line change
Expand Up @@ -12,91 +12,128 @@
using System.Threading.Tasks;
using System.Security.Cryptography;
using System.Windows.Media.Effects;
using System.Windows.Threading;

namespace ManualUpbeatUISample;

public partial class App : Application
{
// This app would like to provide a way for the user to cancel exiting. To do so, we create a shared task that can be triggered and reset.
private TaskCompletionSource _closeRequestedTask = new();
private Exception _exception;

private async void HandleApplicationStartup(object sender, StartupEventArgs e)
{
using var sharedTimer = new SharedTimer();

// The UpbeatStack is the central data structure for an UpbeatUI app. One must be created for the life of the application and should be disposed at the end.
using var upbeatStack = new UpbeatStack();
using (var upbeatStack = new UpbeatStack())
{

// The UpbeatStack depends on mappings of Parameters types to ViewModels and controls to determine which ViewModel to create and which View to show. Without an IServiceProvider, you must manually map each Parameters, ViewModel, and View type, along with a constructur the IUpbeatStack can call to create a ViewModel.
upbeatStack.MapViewModel<BottomViewModel.Parameters, BottomViewModel>(
(service, parameters) => new BottomViewModel(service, sharedTimer));
upbeatStack.MapViewModel<ConfirmPopupViewModel.Parameters, ConfirmPopupViewModel>(
(upbeatService, parameters) => new ConfirmPopupViewModel(upbeatService, parameters, sharedTimer));
// The UpbeatStack depends on mappings of Parameters types to ViewModels and controls to determine which ViewModel to create and which View to show. Without an IServiceProvider, you must manually map each Parameters, ViewModel, and View type, along with a constructur the IUpbeatStack can call to create a ViewModel.
upbeatStack.MapViewModel<BottomViewModel.Parameters, BottomViewModel>(
(service, parameters) => new BottomViewModel(service, sharedTimer));
upbeatStack.MapViewModel<ConfirmPopupViewModel.Parameters, ConfirmPopupViewModel>(
(upbeatService, parameters) => new ConfirmPopupViewModel(upbeatService, parameters, sharedTimer));

// The MenuViewModel's constructor requires an Action that it can use to start closing the application. We will provide the shared _closeRequestedTask's TrySetResult() method to indicate the user has requested to close the application.
upbeatStack.MapViewModel<MenuViewModel.Parameters, MenuViewModel>(
(upbeatService, parameters) => new MenuViewModel(upbeatService, () => _closeRequestedTask.TrySetResult(), sharedTimer));
upbeatStack.MapViewModel<PopupViewModel.Parameters, PopupViewModel>(
(upbeatService, parameters) => new PopupViewModel(parameters, sharedTimer));
upbeatStack.MapViewModel<RandomDataViewModel.Parameters, RandomDataViewModel>(
(upbeatService, parameters) => new RandomDataViewModel(upbeatService, RandomNumberGenerator.Create(), sharedTimer));
upbeatStack.MapViewModel<SharedListViewModel.Parameters, SharedListViewModel>(
(upbeatService, parameters) =>
{
// The SharedListViewModel shares an IUpbeatService and scoped SharedList service with its child ViewModel, the SharedListDataViewModel. The scoped service can be manually created and provided to both.
var sharedList = new SharedList();
return new SharedListViewModel(upbeatService, sharedList, sharedTimer,
new SharedListDataViewModel(upbeatService, sharedList));
});
upbeatStack.MapViewModel<TextEntryPopupViewModel.Parameters, TextEntryPopupViewModel>(
(upbeatService, parameters) => new TextEntryPopupViewModel(upbeatService, parameters, sharedTimer));
// The MenuViewModel's constructor requires an Action that it can use to start closing the application. We will provide the shared _closeRequestedTask's TrySetResult() method to indicate the user has requested to close the application.
upbeatStack.MapViewModel<MenuViewModel.Parameters, MenuViewModel>(
(upbeatService, parameters) => new MenuViewModel(upbeatService, () => _closeRequestedTask.TrySetResult(), sharedTimer));
upbeatStack.MapViewModel<PopupViewModel.Parameters, PopupViewModel>(
(upbeatService, parameters) => new PopupViewModel(parameters, sharedTimer));
upbeatStack.MapViewModel<RandomDataViewModel.Parameters, RandomDataViewModel>(
(upbeatService, parameters) => new RandomDataViewModel(upbeatService, RandomNumberGenerator.Create(), sharedTimer));
upbeatStack.MapViewModel<SharedListViewModel.Parameters, SharedListViewModel>(
(upbeatService, parameters) =>
{
// The SharedListViewModel shares an IUpbeatService and scoped SharedList service with its child ViewModel, the SharedListDataViewModel. The scoped service can be manually created and provided to both.
var sharedList = new SharedList();
return new SharedListViewModel(upbeatService, sharedList, sharedTimer,
new SharedListDataViewModel(upbeatService, sharedList));
});
upbeatStack.MapViewModel<TextEntryPopupViewModel.Parameters, TextEntryPopupViewModel>(
(upbeatService, parameters) => new TextEntryPopupViewModel(upbeatService, parameters, sharedTimer));

// The included UpdateMainWindow class already provides the necessary controls to display Views for ViewModels when an IUpbeatStack is set as the DataContext.
var mainWindow = new UpbeatMainWindow()
{
// You must set the DataContext to the UpbeatStack.
DataContext = upbeatStack,
Title = "UpbeatUI Sample Application",
MinHeight = 275,
MinWidth = 275,
Height = 400,
Width = 400,
WindowStartupLocation = WindowStartupLocation.CenterScreen,
ModalBackground = new SolidColorBrush(Brushes.LightGray.Color) { Opacity = 0.5 }, // The brush to display underneath the top View.
ModalBlurEffect = new BlurEffect() { Radius = 10.0, KernelType = KernelType.Gaussian }, // The blur effect to apply to Views that are not on top. This is optional, as blur effects can significantly impact performance.
};
// The included UpdateMainWindow class already provides the necessary controls to display Views for ViewModels when an IUpbeatStack is set as the DataContext.
var mainWindow = new UpbeatMainWindow()
{
// You must set the DataContext to the UpbeatStack.
DataContext = upbeatStack,
Title = "UpbeatUI Sample Application",
MinHeight = 275,
MinWidth = 275,
Height = 400,
Width = 400,
WindowStartupLocation = WindowStartupLocation.CenterScreen,
ModalBackground = new SolidColorBrush(Brushes.LightGray.Color) { Opacity = 0.5 }, // The brush to display underneath the top View.
ModalBlurEffect = new BlurEffect() { Radius = 10.0, KernelType = KernelType.Gaussian }, // The blur effect to apply to Views that are not on top. This is optional, as blur effects can significantly impact performance.
};

// Override the default Window Closing event to request a close instead of immediately closing itself.
void HandleMainWindowClosing(object sender, CancelEventArgs e)
{
e.Cancel = true;
_ = _closeRequestedTask.TrySetResult();
}
mainWindow.Closing += HandleMainWindowClosing;
// When the UpbeatStack has no more view models, the 'ViewModelsEmptied' event will be triggered, so we can count that as a request to close the application.
void HandleUpbeatStackEmpied(object sender, EventArgs e) => _closeRequestedTask.TrySetResult();
upbeatStack.ViewModelsEmptied += HandleUpbeatStackEmpied;
// Override the default Window Closing event to request a close instead of immediately closing itself.
void HandleMainWindowClosing(object sender, CancelEventArgs e)
{
e.Cancel = true;
_ = _closeRequestedTask.TrySetResult();
}
mainWindow.Closing += HandleMainWindowClosing;
// When the UpbeatStack has no more view models, the 'ViewModelsEmptied' event will be triggered, so we can count that as a request to close the application.
void HandleUpbeatStackEmpied(object sender, EventArgs e) => _closeRequestedTask.TrySetResult();
// Add a mechanism to catch unhandled exceptions.
upbeatStack.ViewModelsEmptied += HandleUpbeatStackEmpied;
void HandleApplicationException(object sender, DispatcherUnhandledExceptionEventArgs e)
{
e.Handled = true;
_exception = e.Exception;
_ = _closeRequestedTask.TrySetException(e.Exception);
}
Current.DispatcherUnhandledException += HandleApplicationException;

// Add a base BottomViewModel to the UpbeatStack.
upbeatStack.OpenViewModel(new BottomViewModel.Parameters());
try
{
// Add a base BottomViewModel to the UpbeatStack.
upbeatStack.OpenViewModel(new BottomViewModel.Parameters());

// We are now ready to show the main window.
mainWindow.Show();
// We are now ready to show the main window.
mainWindow.Show();

// We set up an infinite loop to await the shared _closeRequestedTask, then attempt to close all ViewModels. If successful, we can exit the application. If not successful, possibly because the user cancelled closing, then reset the shared task and await again.
while (true)
// We set up an infinite loop to await the shared _closeRequestedTask, then attempt to close all ViewModels. If successful, we can exit the application. If not successful, possibly because the user cancelled closing, then reset the shared task and await again.
while (true)
{
await _closeRequestedTask.Task.ConfigureAwait(true);
if (await upbeatStack.TryCloseAllViewModelsAsync().ConfigureAwait(true))
{
break;
}
_closeRequestedTask = new TaskCompletionSource();
}
}
catch (Exception ex)
{
_exception ??= ex;
}
finally
{
Current.DispatcherUnhandledException -= HandleApplicationException;
upbeatStack.ViewModelsEmptied -= HandleUpbeatStackEmpied;
mainWindow.Closing -= HandleMainWindowClosing;
mainWindow.Close();
}
}
if (_exception is not null)
{
await _closeRequestedTask.Task.ConfigureAwait(true);
if (await upbeatStack.TryCloseAllViewModelsAsync().ConfigureAwait(true))
if (MessageBox.Show(
$"Error message: {_exception.Message}. See stack trace?",
"Fatal Error",
MessageBoxButton.YesNo,
MessageBoxImage.Error) == MessageBoxResult.Yes)
{
break;
_ = MessageBox.Show(
_exception.StackTrace,
"Fatal Error",
MessageBoxButton.OK,
MessageBoxImage.None);
}
_closeRequestedTask = new TaskCompletionSource();
}

upbeatStack.ViewModelsEmptied -= HandleUpbeatStackEmpied;
mainWindow.Closing -= HandleMainWindowClosing;
mainWindow.Close();
}
}

Loading

0 comments on commit d262ae2

Please sign in to comment.