protected override Task <TestResult> Handle(IExecutionContextReader context, TestQuery request)
{
return(new TestResult
{
Desc = $"{request.Name}FromSecondHandler"
}.WrapInTask());
}
public override Task <IEnumerable <IError> > Validate(IExecutionContextReader context, TestRequest request)
{
return(RuleChecker.For(request)
.Should(x => x.Id.HasValue(), "Id", "Id is required")
.Done()
.WrapInTask());
}
public static async Task <TResult> GetAsync <TResult>(IServiceProvider sp, IExecutionContextReader context, ILogger logger, bool failSafe)
{
var handler = sp.GetServices <IResponseHandlerAsync <TResult> >()
?.Where(h => h.IsApplicable(context)).FirstOrDefault();
if (handler == null)
{
if (failSafe)
{
logger.LogWarning($"No handler found that impement IResponseProvider<{typeof(TResult).FullName}>");
return(default(TResult));
}
throw new RequestBusException($"No response handler defined for type {typeof(IResponseHandlerAsync<TResult>)}");
}
#if DEBUG
var timer = Timer.Start(logger, handler);
#endif
var response = await handler.Handle(context);
#if DEBUG
timer.Completed();
#endif
if (response == null)
{
return(default(TResult));
}
await sp.FilterAsync(context, response, logger);
return(response.Result);
}
protected override Task <TestResponse> Handle(IExecutionContextReader context, TestRequest request)
{
return(new TestResponse
{
Name = "Main"
}.WrapInTask());
}
public override Task Filter(IExecutionContextReader context, IResponse <Customer> response)
{
if (response.IsSucceed)
{
response.Result.Name = response.Result.Name + "Filtered";
}
return(Task.FromResult(0));
}
protected override Task <ShowroomViewModel> Handle(IExecutionContextReader context, ShowroomRequest request)
{
var tenantName = _tenant.Name;
var provider = _providers.FirstOrDefault(x => x.ForTenants.Any(tenant => tenantName.IsSame(tenant)));
return(provider == null
? Task.FromResult <ShowroomViewModel>(null)
: Task.FromResult(provider.Get()));
}
public override Task <IEnumerable <IError> > Validate(IExecutionContextReader context, TestQuery request)
{
return(RuleChecker
.For(request)
.Should(r => !string.IsNullOrWhiteSpace(r.Id), "Id", "Id is required", "TESTQUERY_SECOND_ID_REQUIRED")
.Should(r => !string.IsNullOrWhiteSpace(r.Name), "Name", "Name is required", "TESTQUERY_SECOND_NAME_REQUIRED")
.Done()
.WrapInTask());
}
protected override async Task Handle(IExecutionContextReader context, RegisterUser request)
{
var id = await _userService.Create(request);
await _emailSender.SendAsync(request);
await _authenticator.Authenticate(new UserAuthRequest
{
Email = request.Email,
Id = id
});
}
async Task <IResponse> IRequestHandlerAsync <LoginRequest> .Handle(IExecutionContextReader context, LoginRequest request)
{
var user = await _userService.Retrieve(request);
if (user == null)
{
return(FailedResponse());
}
await _authenticator.Authenticate(new UserAuthRequest
{
Id = user.Id,
Email = user.Email
});
return(Response.Succeed());
}
protected override async Task <ProductDetailsViewModel> Handle(IExecutionContextReader context, LoadProductDetails request)
{
var product = await _productApiProxy.GetAsync(request.Id);
if (product == null)
{
return(null);
}
var discount = _discountCalculator.Calculate(product.Price);
return(new ProductDetailsViewModel
{
Title = product.Title,
PriceText = product.Price.ToString("C"),
DiscountText = discount > 0 ? discount.ToString("C") : string.Empty
});
}
public static Task PublishAsync <TEvent>(IServiceProvider sp, IExecutionContextReader context, ILogger logger, TEvent evnt, bool failSafe)
{
var handlers = sp.GetServices <IEventHandlerAsync <TEvent> >()
?.Where(h => h.IsApplicable(context, evnt));
if (handlers == null)
{
return(Task.FromResult(0));
}
var tasks = handlers.Select(async h => {
if (!failSafe)
{
#if DEBUG
var timer = Timer.Start(logger, h);
#endif
await h.Handle(context, evnt);
#if DEBUG
timer.Completed();
#endif
}
else
{
try
{
#if DEBUG
var timer = Timer.Start(logger, h);
#endif
await h.Handle(context, evnt);
#if DEBUG
timer.Completed();
#endif
}
catch (Exception e)
{
logger.LogError(0, e, e.Message);
}
}
});
return(Task.WhenAll(tasks));
}
public async Task <IExecutionContextReader> GetAsync(IServiceProvider serviceProvider)
{
if (_context != null)
{
return(_context);
}
var populators = serviceProvider.GetServices <IExecutionContextPopulatorAsync>();
var context = new ExecutionContext();
if (populators != null)
{
var tasks = populators.Select(p => p.Init(context));
await Task.WhenAll(tasks);
}
_context = context;
return(_context);
}
protected abstract Task Handle(IExecutionContextReader context, TRequest request);
private static async Task <IResponseUnit <TResult> > HandleResponseHandler <TRequest, TResult>(IExecutionContextReader context, IResponseHandlerAsync <TRequest, TResult> h, TRequest request, ILogger logger)
{
#if DEBUG
var timer = Timer.Start(logger, h);
#endif
IResponse <TResult> rsp;
if (h.ExecutionHint != ExecutionHintType.Main)
{
rsp = await h.Handle(context, request);
}
else
{
try
{
rsp = await h.Handle(context, request);
}
catch (Exception e)
{
rsp = Response.Failed <TResult>();
logger.LogError(0, e, $"ResponseHandler {h.GetType().FullName} failed with message {e.Message}");
}
}
#if DEBUG
timer.Completed();
#endif
return(Convert(rsp, h.ExecutionHint));
}
Task <IResponse> IRequestHandlerAsync <TRequest> .Handle(IExecutionContextReader context, TRequest request)
{
return(Handle(context, request)
.ContinueWith(t => Response.Succeed()));
}
public static async Task <IEnumerable <IResponseUnit <TResult> > > GetAllAsync <TRequest, TResult>(IServiceProvider sp, IExecutionContextReader context, ILogger logger, TRequest request)
{
var errors = await sp.ValidateAsync(context, request, logger);
var result = new List <IResponseUnit <TResult> >();
if (errors.Any())
{
result.Add(new ResponseUnit <TResult>
{
Errors = errors,
IsMainResponse = true,
IsSucceed = false
});
return(result);
}
var allApplicableHandlers = sp.GetServices <IResponseHandlerAsync <TRequest, TResult> >()
?.Where(t => t.IsApplicable(context, request))
?? Enumerable.Empty <IResponseHandlerAsync <TRequest, TResult> >();
var mainHandlers = allApplicableHandlers.Where(t => t.ExecutionHint == ExecutionHintType.Independent ||
t.ExecutionHint == ExecutionHintType.Main);
var mainHandlerTasks = mainHandlers
.Select(h => HandleResponseHandler(context, h, request, logger));
await Task.WhenAll(mainHandlerTasks);
var isMainFailed = false;
foreach (var task in mainHandlerTasks)
{
if (task.Result == null)
{
continue;
}
if (task.Result.IsMainResponse)
{
isMainFailed = !task.Result.IsSucceed;
}
result.Add(task.Result);
}
if (isMainFailed)
{
return(result);
}
var dependentHandlers = allApplicableHandlers.Where(h => h.ExecutionHint == ExecutionHintType.Dependent);
var dependentHandlerTasks = dependentHandlers
.Select(h => HandleResponseHandler(context, h, request, logger));
await Task.WhenAll(dependentHandlerTasks);
foreach (var task in dependentHandlerTasks)
{
if (task.Result == null)
{
continue;
}
result.Add(task.Result);
}
var filters = sp.GetServices <IResponseCollectionFilterAsync <TRequest, TResult> >()
?.Where(x => x.IsApplicable(context, request))
?? Enumerable.Empty <IResponseCollectionFilterAsync <TRequest, TResult> >();
foreach (var filter in filters)
{
#if DEBUG
var timer = Timer.Start(logger, filter);
#endif
await filter.Filter(context, request, result);
#if DEBUG
timer.Completed();
#endif
}
return(result);
}
public override bool IsApplicable(IExecutionContextReader context, TestQuery request)
{
return(context.Get <string>("handler").IsSame("second"));
}
public override bool IsApplicable(IExecutionContextReader context, TestRequest request)
{
var control = context.Get <string>("control");
return(control.IsSame("a"));
}
public abstract Task Handle(IExecutionContextReader context, TEvent evnt);
protected abstract Task <TResult> Handle(IExecutionContextReader context);
public static T Get <T>(this IExecutionContextReader source, string key)
{
return((T)(source.Get(key)));
}
internal static async Task FilterAsync <TRequest, TResult>(this IServiceProvider service, IExecutionContextReader context, TRequest request, IResponse <TResult> response, ILogger logger)
{
if (response == null || !response.IsSucceed || response.Result == null)
{
return;
}
var filters = service.GetServices <IResponseFilterAsync <TRequest, TResult> >()
?.Where(h => h.IsApplicable(context, request));
if (filters == null)
{
return;
}
foreach (var filter in filters)
{
#if DEBUG
var timer = Timer.Start(logger, filter);
#endif
await filter.Filter(context, request, response);
#if DEBUG
timer.Completed();
#endif
}
}
Task <IResponse <TResult> > IResponseHandlerAsync <TResult> .Handle(IExecutionContextReader context)
{
return(Handle(context).ContinueWith(h => Response.Succeed(h.Result)));
}
public Task <IResponse <TestResponse> > Handle(IExecutionContextReader context, TestRequest request)
{
return(Response.Failed <TestResponse>().WrapInTask());
}
public bool IsApplicable(IExecutionContextReader context, TestRequest request)
{
return(context.Get <string>("control").IsSame("mainfailed"));
}
public abstract Task <IEnumerable <IError> > Validate(IExecutionContextReader context, TRequest request);
public virtual bool IsApplicable(IExecutionContextReader context, TRequest request) => true;
internal static async Task <IEnumerable <IError> > ValidateAsync <TRequest>(this IServiceProvider serviceProvider, IExecutionContextReader context, TRequest request, ILogger logger)
{
var validators = serviceProvider.GetServices <IValidatorAsync <TRequest> >()
?.Where(s => s.IsApplicable(context, request))
?? Enumerable.Empty <IValidatorAsync <TRequest> >();
foreach (var val in validators)
{
IEnumerable <IError> errors;
#if DEBUG
var timer = Timer.Start(logger, val);
#endif
errors = await val.Validate(context, request);
#if DEBUG
timer.Completed();
#endif
if (errors != null && errors.Any())
{
return(errors);
}
}
return(Enumerable.Empty <IError>());
}
internal static async Task <IResponse <TResult> > SendAsync <TRequest, TResult>(IServiceProvider serviceProvider, IExecutionContextReader context, ILogger logger, TRequest request, bool failSafe)
{
var errors = await serviceProvider.ValidateAsync(context, request, logger);
if (errors != null && errors.Any())
{
return(Response.Failed <TResult>(errors));
}
var handler = serviceProvider.GetServices <IRequestHandlerAsync <TRequest, TResult> >()
?.Where(h => h.IsApplicable(context, request)).FirstOrDefault();
if (handler == null)
{
if (failSafe)
{
return(Response.NoHandler <TResult>());
}
throw new RequestBusException($"No request handler found that implement IRequestHandlerAsync<{typeof(TRequest).FullName},{typeof(TResult).FullName}>");
}
#if DEBUG
var timer = Timer.Start(logger, handler);
#endif
var result = await handler.Handle(context, request);
#if DEBUG
timer.Completed();
#endif
await serviceProvider.FilterAsync(context, request, result, logger);
return(result);
}
public override bool IsApplicable(IExecutionContextReader context, TestRequest request)
{
return(context.Get <string>("control").IsSame("ValidationFailed"));
}
