public RequestHandlerChainer(
IRequestHandlerChain <TRequest, TResponse> requestHandlerChain,
IRequestHandler <TRequest, TResponse> next)
{
this._RequestHandlerChain = requestHandlerChain ?? throw new ArgumentNullException(nameof(requestHandlerChain));
this._Next = next ?? throw new ArgumentNullException(nameof(next));
}
public IRootRequestHandler <TResponse> GetRootRequestHandler <TRequest, TResponse>()
where TRequest : IRequest <TResponse>
{
IRequestHandler <TRequest, TResponse> requestHandler;
IEnumerable <IRequestHandlerChain <TRequest, TResponse> >?requestHandlerChains;
try {
requestHandler = this._RequestHandlerFactory.CreateRequestHandler <IRequestHandler <TRequest, TResponse> >();
} catch (Exception error) {
throw new InvalidOperationException($"Error constructing handler for request of type {typeof(IRequestHandler<TRequest, TResponse>)}.", error);
}
if (requestHandler == null)
{
throw new InvalidOperationException($"Handler was not found for request of type {typeof(IRequestHandler<TRequest, TResponse>)}.");
}
try {
requestHandlerChains = this._RequestHandlerFactory.CreateRequestHandlerChains <IRequestHandlerChain <TRequest, TResponse> >();
} catch (Exception error) {
throw new InvalidOperationException($"Error constructing handler for request of type {typeof(IRequestHandlerChain<TRequest, TResponse>)}.", error);
}
//var lstRequestHandleCfg = new List<RequestHandlerConfiguration>();
var result = requestHandler;
if (requestHandlerChains is object)
{
var lstRequestHandlerChain = requestHandlerChains.ToList();
lstRequestHandlerChain.Sort(IRequestHandlerChainBaseComparer.GetInstance());
for (int idx = lstRequestHandlerChain.Count - 1; idx >= 0; idx--)
{
IRequestHandlerChain <TRequest, TResponse>?chain = lstRequestHandlerChain[idx];
if (chain is object)
{
result = new RequestHandlerChainer <TRequest, TResponse>(chain, result);
}
}
}
return(new RootRequestHandler <TRequest, TResponse>(result));
}