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ServiceRunner.cs
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using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using SimpleStack.Enums;
using SimpleStack.Extensions;
using SimpleStack.Interfaces;
using SimpleStack.Logging;
using SimpleStack.Serializers;
using SimpleStack.Tools;
namespace SimpleStack
{
public class ServiceRunner<TRequest> : IServiceRunner<TRequest>
{
private static readonly ILog Log = Logger.CreateLog();
protected readonly IAppHost AppHost;
protected readonly ActionInvokerFn ServiceAction;
protected readonly IHasRequestFilter[] RequestFilters;
protected readonly IHasResponseFilter[] ResponseFilters;
public ServiceRunner() { }
public ServiceRunner(IAppHost appHost, ActionContext actionContext)
{
this.AppHost = appHost;
this.ServiceAction = actionContext.ServiceAction;
this.RequestFilters = actionContext.RequestFilters;
this.ResponseFilters = actionContext.ResponseFilters;
}
public IAppHost GetAppHost()
{
return AppHost ?? EndpointHost.AppHost;
}
public T TryResolve<T>()
{
return this.GetAppHost() == null
? default(T)
: this.GetAppHost().TryResolve<T>();
}
public T ResolveService<T>(IRequestContext requestContext)
{
var service = this.GetAppHost().TryResolve<T>();
var requiresContext = service as IRequiresRequestContext;
if (requiresContext != null)
{
requiresContext.RequestContext = requestContext;
}
return service;
}
public virtual void BeforeEachRequest(IRequestContext requestContext, TRequest request)
{
OnBeforeExecute(requestContext, request);
//var requestLogger = TryResolve<IRequestLogger>();
//if (requestLogger != null)
//{
// requestContext.SetItem("_requestDurationStopwatch", Stopwatch.StartNew());
//}
}
public virtual object AfterEachRequest(IRequestContext requestContext, TRequest request, object response)
{
//var requestLogger = TryResolve<IRequestLogger>();
//if (requestLogger != null)
//{
// try
// {
// var stopWatch = (Stopwatch)requestContext.GetItem("_requestDurationStopwatch");
// requestLogger.Log(requestContext, request, response, stopWatch.Elapsed);
// }
// catch (Exception ex)
// {
// Log.Error("Error while logging request: " + request.Dump(), ex);
// }
//}
//only call OnAfterExecute if no exception occured
return response.IsErrorResponse() ? response : OnAfterExecute(requestContext, response);
}
public virtual void OnBeforeExecute(IRequestContext requestContext, TRequest request) { }
public virtual object OnAfterExecute(IRequestContext requestContext, object response)
{
return response;
}
public virtual object Execute(IRequestContext requestContext, object instance, TRequest request)
{
try
{
BeforeEachRequest(requestContext, request);
var appHost = GetAppHost();
var container = appHost != null ? appHost.Config.ServiceManager.Container : null;
var httpReq = requestContext != null ? requestContext.Get<IHttpRequest>() : null;
var httpRes = requestContext != null ? requestContext.Get<IHttpResponse>() : null;
if (RequestFilters != null)
{
foreach (var requestFilter in RequestFilters)
{
var attrInstance = requestFilter.Copy();
if (container != null)
container.AutoWire(attrInstance);
attrInstance.RequestFilter(httpReq, httpRes, request);
if (appHost != null)
appHost.Release(attrInstance);
if (httpRes != null && httpRes.IsClosed) return null;
}
}
var response = AfterEachRequest(requestContext, request, ServiceAction(instance, request));
if (ResponseFilters != null)
{
foreach (var responseFilter in ResponseFilters)
{
var attrInstance = responseFilter.Copy();
if (container != null)
container.AutoWire(attrInstance);
attrInstance.ResponseFilter(httpReq, httpRes, response);
if (appHost != null)
appHost.Release(attrInstance);
if (httpRes != null && httpRes.IsClosed) return null;
}
}
return response;
}
catch (Exception ex)
{
var result = HandleException(requestContext, request, ex);
if (result == null) throw;
return result;
}
}
//public virtual object Execute(IRequestContext requestContext, object instance, IMessage<TRequest> request)
//{
// return Execute(requestContext, instance, request.GetBody());
//}
public virtual object HandleException(IRequestContext requestContext, TRequest request, Exception ex)
{
var useAppHost = GetAppHost();
object errorResponse = null;
if (useAppHost != null && useAppHost.ServiceExceptionHandler != null)
errorResponse = useAppHost.ServiceExceptionHandler(requestContext.Get<IHttpRequest>(), request, ex);
if (errorResponse == null)
errorResponse = DtoUtils.HandleException(useAppHost, request, ex);
AfterEachRequest(requestContext, request, errorResponse ?? ex);
return errorResponse;
}
public object ExecuteOneWay(IRequestContext requestContext, object instance, TRequest request)
{
/*var msgFactory = TryResolve<IMessageFactory>();
if (msgFactory == null)
{
return Execute(requestContext, instance, request);
}
//Capture and persist this async request on this Services 'In Queue'
//for execution after this request has been completed
using (var producer = msgFactory.CreateMessageProducer())
{
producer.Publish(request);
}
return WebRequestUtils.GetErrorResponseDtoType(request).CreateInstance();
* */
return null;
}
//signature matches ServiceExecFn
public object Process(IRequestContext requestContext, object instance, object request)
{
return requestContext != null && requestContext.EndpointAttributes.Has(EndpointAttributes.OneWay)
? ExecuteOneWay(requestContext, instance, (TRequest)request)
: Execute(requestContext, instance, (TRequest)request);
}
}
}