public static EngineSettings Match(this IRunningEngineTable table, HttpContext httpContext)
{
if (httpContext == null)
{
throw new ArgumentNullException(nameof(httpContext));
}
var httpRequest = httpContext.Request;
return(table.Match(httpRequest.Host.ToString(), httpRequest.Path, true));
}
public async Task Invoke(HttpContext httpContext)
{
_host.Initialize();
var engineSettings = _runningEngineTable.Match(httpContext);
if (engineSettings != null)
{
var engineContext = _host.GetOrCreateEngineContext(engineSettings);
var hasPendingTasks = false;
using (var scope = engineContext.EnterServiceScope())
{
httpContext.Features.Set(engineContext);
// 把租户前缀加到 cookie 里
httpContext.Response.Cookies.Append("tenant_prefix", engineSettings.RequestUrlPrefix ?? "");
httpContext.Response.Cookies.Append("tenant_host", engineSettings.RequestUrlHost ?? "");
if (!engineContext.IsActivated)
{
var semaphore = _semaphores.GetOrAdd(engineSettings.Name, (name) => new SemaphoreSlim(1));
await semaphore.WaitAsync();
try
{
if (!engineContext.IsActivated)
{
using (var activatingScope = engineContext.EnterServiceScope())
{
var tenantEvents = activatingScope.ServiceProvider.GetServices <IModuleTenantEvents>();
foreach (var tenantEvent in tenantEvents)
{
await tenantEvent.ActivatingAsync();
}
httpContext.Items["BuildPipeline"] = true;
foreach (var tenantEvent in tenantEvents.Reverse())
{
await tenantEvent.ActivatedAsync();
}
}
engineContext.IsActivated = true;
}
}
finally
{
semaphore.Release();
_semaphores.TryRemove(engineSettings.Name, out semaphore);
}
}
await _next.Invoke(httpContext);
var deferredTaskEngine = scope.ServiceProvider.GetService <IDeferredTaskEngine>();
hasPendingTasks = deferredTaskEngine?.HasPendingTasks ?? false;
}
if (hasPendingTasks)
{
engineContext = _host.GetOrCreateEngineContext(engineSettings);
using (var scope = engineContext.EnterServiceScope())
{
var deferredTaskEngine = scope.ServiceProvider.GetService <IDeferredTaskEngine>();
var context = new DeferredTaskContext(scope.ServiceProvider);
await deferredTaskEngine.ExecuteTasksAsync(context);
}
}
}
}