public async Task <IQueryResult <TQuery, TResult> > Execute <TQuery, TResult>(TQuery query) where TQuery : IQuery <TResult>
{
var queryHandler = this._dependencyResolver.Get <IQueryHandler <TQuery, TResult> >();
var result = new QueryExecutionResult <TQuery, TResult>(this._dependencyResolver);
var success = await queryHandler.CheckContext(query, this._context, result) &&
await queryHandler.CheckParameters(query, result) &&
await this.ExecuteQueryHandler(query, queryHandler, result);
return(result);
}
public async Task <IQueryResult <TResult> > ExecuteInternal <TQuery, TResult>(TQuery command,
Func <TQuery, TResult> resultAccessor) where TQuery : IQuery
{
var result = new QueryExecutionResult <TResult>(teclyn);
this.CheckContextInternal(command, result);
this.CheckParametersInternal(command, result);
if (!result.Errors.Any())
{
// execute
await command.Execute(result);
// get result
result.Result = resultAccessor(command);
result.SetSuccess();
}
return(result);
}
private async Task <bool> ExecuteQueryHandler <TQuery, TResult>(TQuery command, IQueryHandler <TQuery, TResult> queryHandler, QueryExecutionResult <TQuery, TResult> result) where TQuery : IQuery <TResult>
{
try
{
var handlerResult = await queryHandler.Execute(command, result);
result.SetSuccess();
result.Result = handlerResult;
return(true);
}
catch (Exception exception)
{
result.SetFailure(exception.ToString());
return(false);
}
}
private void CheckContextInternal(IQuery query, QueryExecutionResult result)
{
result.ContextIsValid = query.CheckContext(context, result);
}
private void CheckParametersInternal(IQuery query, QueryExecutionResult result)
{
result.ParametersAreValid = query.CheckParameters(result);
}
public UserFriendlyQueryResult(QueryExecutionResult <TResult> result)
{
this.Success = result.Success;
this.Errors = result.Errors.ToArray();
this.Result = result.Result;
}