public async Task run_parent_child_scenario()
{
var hostBuilder = CreateHostBuilder();
var message = new StartParentSaga(Guid.NewGuid(), Guid.NewGuid());
var received = false;
var tokenSource = new CancellationTokenSource(TimeSpan.FromMinutes(2));
Action <ParentSagaCompleted> onMessage = msg =>
{
received = true;
tokenSource.Cancel();
};
hostBuilder.ConfigureServices((ctx, services) => { services.AddSingleton(onMessage); });
var host = hostBuilder.Build();
await host.SetupInfrastructureAsync();
using var scope = host.Services.CreateScope();
var bus = scope.ServiceProvider.GetRequiredService <IMessageBus>();
await Task.WhenAll(new[]
{
host.RunAsync(token: tokenSource.Token),
bus.PublishAsync(message, tokenSource.Token)
});
received.Should().BeTrue();
}
public async Task run_parent_child_scenario(int hostsCount)
{
var message = new StartParentSaga(Guid.NewGuid(), Guid.NewGuid());
var receivedCount = 0;
var tokenSource = new CancellationTokenSource(TimeSpan.FromMinutes(2));
Action <IMessageContext <ParentSagaCompleted> > onMessage = ctx =>
{
receivedCount++;
tokenSource.CancelAfter(TimeSpan.FromSeconds(10));
ctx.Message.CorrelationId.Should().Be(message.CorrelationId);
};
var createHostTasks = Enumerable.Range(1, hostsCount)
.Select(async i =>
{
var host = await SetupHost(onMessage);
await host.StartAsync(tokenSource.Token);
return(host);
}).ToArray();
await Task.WhenAll(createHostTasks);
if (tokenSource.IsCancellationRequested)
{
throw new Exception("a timeout occurred during hosts initialization.");
}
var producerHost = createHostTasks.First().Result;
using var scope = producerHost.Services.CreateScope();
var bus = scope.ServiceProvider.GetRequiredService <IMessageBus>();
await bus.PublishAsync(message, tokenSource.Token);
while (!tokenSource.IsCancellationRequested)
{
await Task.Delay(10);
}
foreach (var t in createHostTasks)
{
try
{
t.Result.Dispose();
}
catch {}
}
receivedCount.Should().Be(1);
}
static async Task Main(string[] args)
{
var hostBuilder = CreateHostBuilder(args);
var host = hostBuilder.Build();
using var scope = host.Services.CreateScope();
var bus = scope.ServiceProvider.GetRequiredService <IMessageBus>();
var message = new StartParentSaga(Guid.NewGuid(), Guid.NewGuid());
await Task.WhenAll(new[]
{
host.RunAsync(),
bus.PublishAsync(message)
});
}
