private async Task ExecutePostHandleBehaviorsAsync(CommandBehaviorResult result, CommandResponse <TResponse> response)
{
var behaviors = new List <ICommandBehavior>(this.behaviors.Safe().Reverse()); // TODO: order!
foreach (var behavior in behaviors) // build up the behaviors chain
{
behavior.SetNext(behaviors.NextOf(behavior));
}
this.Logger.LogDebug($"{{LogKey:l}} command behaviors chain: post={behaviors.Select(e => e.GetType().PrettyName()).ToString("|")}", LogKeys.AppCommand);
if (behaviors.Count > 0) // execute all chained behaviors
{
await this.behaviors.First().ExecutePostHandleAsync(response, result).AnyContext();
}
}
private async Task <CommandBehaviorResult> ExecutePreHandleBehaviorsAsync(TCommand request)
{
var behaviors = new List <ICommandBehavior>(this.behaviors.Safe()); // TODO: order!
foreach (var behavior in behaviors) // build up the behaviors chain
{
behavior.SetNext(behaviors.NextOf(behavior));
}
this.Logger.LogDebug($"{{LogKey:l}} command behaviors chain: pre={behaviors.Select(e => e.GetType().PrettyName()).ToString("|")}", LogKeys.AppCommand);
var result = new CommandBehaviorResult();
if (behaviors.Count > 0) // execute all chained behaviors
{
await this.behaviors.First().ExecutePreHandleAsync(request, result).AnyContext();
}
return(result);
}
public async Task ExecutePostHandleAsync <TResponse>(CommandResponse <TResponse> response, CommandBehaviorResult result)
{
if (!result.Cancelled && this.next != null)
{
await this.next.ExecutePostHandleAsync(response, result).AnyContext();
}
}
/// <summary>
/// Executes this behavior for the specified command.
/// </summary>
/// <typeparam name="TResponse">The type of the response.</typeparam>
/// <param name="request">The command.</param>
public async Task ExecutePreHandleAsync <TResponse>(Command <TResponse> request, CommandBehaviorResult result)
{
EnsureArg.IsNotNull(request);
var validationResult = request.Validate();
if (!validationResult.IsValid)
{
// TODO: log validation errors
if (this.throwOnNotIsValid)
{
throw new ValidationException($"{request.GetType().Name} has validation errors: " + validationResult.Errors.Safe().Select(e => $"{e.PropertyName}={e}").ToString(", "), validationResult.Errors);
}
else
{
result.SetCancelled($"{request.GetType().Name} has validation errors: " + validationResult.Errors.Safe().Select(e => $"{e.PropertyName}={e}").ToString(", "));
}
}
if (!result.Cancelled && this.next != null)
{
await this.next.ExecutePreHandleAsync(request, result).AnyContext();
}
// terminate here
}
/// <summary>
/// Executes this behavior for the specified command.
/// </summary>
/// <typeparam name="TResponse">The type of the response.</typeparam>
/// <param name="request">The command.</param>
public async Task ExecutePreHandleAsync <TResponse>(Command <TResponse> request, CommandBehaviorResult result)
{
EnsureArg.IsNotNull(request);
//ISpan parentSpan = null;
//if (request.Properties.ContainsKey(CommandPropertyKeys.TraceId) && request.Properties.ContainsKey(CommandPropertyKeys.ParentSpanId))
//{
// // dehydrate parent span
// parentSpan = new Span(request.Properties.GetValueOrDefault(CommandPropertyKeys.TraceId) as string, request.Properties.GetValueOrDefault(CommandPropertyKeys.ParentSpanId) as string);
//}
//this.scope = this.tracer?.BuildSpan(
// $"command {request.GetType().PrettyName()}".ToLowerInvariant(),
// LogKeys.AppCommand,
// SpanKind.Consumer,
// parentSpan).Activate(this.logger);
if (!result.Cancelled && this.next != null)
{
await this.next.ExecutePreHandleAsync(request, result).AnyContext();
}
else
{
//this.scope?.Dispose();
}
// terminate here
}
/// <summary>
/// Executes this behavior for the specified command.
/// </summary>
/// <typeparam name="TResponse">The type of the response.</typeparam>
/// <param name="request">The command.</param>
public async Task ExecutePreHandleAsync <TResponse>(Command <TResponse> request, CommandBehaviorResult result)
{
EnsureArg.IsNotNull(request);
this.logger.LogJournal(LogKeys.AppCommand, $"send (name={request.GetType().PrettyName()}, id={request.Id})", LogPropertyKeys.TrackSendCommand);
if (!result.Cancelled && this.next != null)
{
await this.next.ExecutePreHandleAsync(request, result).AnyContext();
}
// terminate here
}
/// <summary>
/// Executes this behavior for the specified command.
/// </summary>
/// <typeparam name="TResponse">The type of the response.</typeparam>
/// <param name="request">The command.</param>
public async Task ExecutePreHandleAsync <TResponse>(Command <TResponse> request, CommandBehaviorResult result)
{
EnsureArg.IsNotNull(request);
// TODO: implement
// - check if command exists in repo/filestorage
// - if not add to repo, return CommandBehaviorResult
if (!result.Cancelled && this.next != null)
{
await this.next.ExecutePreHandleAsync(request, result).AnyContext();
}
// terminate here
}