/// <summary>
/// 查询执行元素
/// </summary>
/// <typeparam name="TEvent">事件类型</typeparam>
/// <param name="commandContext">命令上下文</param>
/// <param name="e">事件</param>
/// <returns></returns>
private List <EventExcutingElement> FindEventExcutingElement <TEvent>(ICommandContext commandContext, TEvent e)
where TEvent : IEvent
{
try
{
var provider = new EventHandlerProvider(this.serviceLocator.BeginLifetimeScope());
var elements = EventBusExcutingHelper.FindEventExcutingElement(provider, commandContext, e);
commandContext.Items["BeginLifetimeScope"] = provider.Scope;
return(elements);
}
catch
{
throw;
}
}
internal static List <EventExcutingElement> FindEventExcutingElement <TEvent>(EventHandlerProvider provider, ICommandContext commandContext, TEvent e) where TEvent : IEvent
{
var eventHandlers = provider.FindHandler <TEvent>();
if (eventHandlers == null)
{
return new List <EventExcutingElement> {
}
}
;
/*先获取到每个eventHandler的所有属性*/
var elements = new List <EventExcutingElement>();
foreach (var item in eventHandlers)
{
var handlerType = item.GetType();
var attributes = HandlerBehaviorStorager.Default.GetAttributes(handlerType);
var sortAttribute = ObjectExtension.GetAttribute <EventHandlerPriorityAttribute>(attributes);
var loggerAttribute = ObjectExtension.GetAttribute <Aop.LoggerAttribute>(attributes);
ILoggerBuilder loggerBuilder = null;
if (loggerAttribute != null)
{
try
{
loggerBuilder = loggerAttribute.RegisterKey.IsNotNullOrEmpty() ? provider.Scope.Resolve <ILoggerBuilder>(loggerAttribute.RegisterKey) : provider.Scope.ResolveOptional <ILoggerBuilder>();
}
catch
{
}
}
var eventContext = provider.FindEventContext();
if (eventContext is DefaultEventContext)
{
((DefaultEventContext)eventContext).WorkTime = eventContext.WorkTime;
}
elements.Add(new EventExcutingElement()
{
Order = (sortAttribute == null || sortAttribute.Order < 0) ? 1 : sortAttribute.Order,
EventContext = eventContext,
EventHandler = item,
EventHandlerType = handlerType,
LoggerBuilder = loggerBuilder ?? LoggerBuilder.Empty,
LoggerAttribute = loggerAttribute,
HandlerFilters = ObjectExtension.GetAttributes <EventHandlerFilterAttribute>(HandlerBehaviorStorager.Default.GetAttributes(handlerType, e.GetType()))
});
}
elements.Sort((x, y) =>
{
if (x.Equals(y))
{
return(1);
}
return(x.Order > y.Order ? 1 : -1);
});
return(elements);
}