public async override Task <AddGreetingCommand> HandleAsync(AddGreetingCommand command,
CancellationToken cancellationToken = default(CancellationToken))
{
await _unitOfWork.BeginTransactionAsync(cancellationToken);
try
{
//Save the new Greeting
var greeting = new Greeting()
{
GreetingMessage = command.GreetingMessage
};
await _dataContext.GreetingsRegister.AddAsync(greeting, cancellationToken);
//Create an Event for externals
var newGreetingAddedEvent = new GreetingAsyncEvent()
{
Greeting = command.GreetingMessage
};
var eventId = await _commandProcessor.DepositPostAsync(newGreetingAddedEvent, cancellationToken : cancellationToken);
await _dataContext.SaveChangesAsync(cancellationToken);
if (command.ThrowError)
{
throw new Exception("something broke error");
}
else
{
//Ensure for Testing to Ensure that Contexts are not shared
Thread.Sleep(5000);
}
await _unitOfWork.CommitAsync(cancellationToken);
//In Case there is no outbox Sweeper
await _commandProcessor.ClearOutboxAsync(new[] { eventId }, cancellationToken : cancellationToken);
Console.WriteLine($"Message {command.GreetingMessage} Saved.");
}
catch (Exception e)
{
Console.WriteLine(e);
await _unitOfWork.RollbackAsync(cancellationToken);
Console.WriteLine($"Message {command.GreetingMessage} not Saved.");
}
return(await base.HandleAsync(command));
}
public async Task <IActionResult> SendMessage()
{
var greetingAsync = new GreetingAsyncEvent("Hello from the web");
var greeting = new GreetingEvent("Hello from the web");
_context.Greetings.Add(greeting);
_context.GreetingsAsync.Add(greetingAsync);
await _context.SaveChangesAsync();
_commandProcessor.Post(greeting);
await _commandProcessor.PostAsync(greetingAsync);
return(View("Index"));
}
public async Task <IActionResult> SaveAndRollbackMessage()
{
var transaction = await _context.Database.BeginTransactionAsync();
// try
// {
var greetingAsync = new GreetingAsyncEvent("Hello from the web - 1");
var greeting = new GreetingEvent("Hello from the web - 1");
_context.Greetings.Add(greeting);
_context.GreetingsAsync.Add(greetingAsync);
await _context.SaveChangesAsync();
_commandProcessor.DepositPost(greeting);
await _commandProcessor.DepositPostAsync(greetingAsync);
//throw new Exception("Something went wrong");
// }
// catch (Exception e)
// {
await transaction.RollbackAsync();
// }
var greetingAsync2 = new GreetingAsyncEvent("Hello from the web - 2");
var greeting2 = new GreetingEvent("Hello from the web - 2");
_context.Greetings.Add(greeting2);
_context.GreetingsAsync.Add(greetingAsync2);
_commandProcessor.DepositPost(greeting2);
await _context.SaveChangesAsync();
await _commandProcessor.DepositPostAsync(greetingAsync2);
var msgs = new List <Guid>();
// msgs.Add(greeting.Id);
// msgs.Add(greetingAsync.Id);
msgs.Add(greeting2.Id);
msgs.Add(greetingAsync2.Id);
await _commandProcessor.ClearOutboxAsync(msgs);
return(View("Index"));
}
