private object GetHandler <TResult>(IQuerySpec <TResult> querySpec)
{
if (_dict.ContainsKey(querySpec.GetType()))
{
return(_dict[querySpec.GetType()]);
}
var handlerType = typeof(IQueryHandler <,>).MakeGenericType(querySpec.GetType(), typeof(TResult));
var handler = _serviceProvider.GetRequiredService(handlerType);
_dict.Add(querySpec.GetType(), handler);
return(handler);
}
public async Task <TResult> ExecuteQuery <TResult>(IQuerySpec <TResult> querySpec)
{
var handler = GetHandler(querySpec);
try
{
_logger.LogInformation($"Handling query {querySpec.GetType()}");
var result = await(Task <TResult>)((dynamic)handler).Handle((dynamic)querySpec);
return(result);
}
catch (Exception e)
{
_logger.LogError(e,
$"Query exception occured during handling of {querySpec.GetType()} query in {handler.GetType()}");
throw; //TODO: Decide if throwing is required
}
}