项目学习——后台事件监听并触发相应操作

NopCommerce项目学习——后台事件监听并触发相应操作

 

1、Nop.Services.Customers. CustomerService 中操作数据时，调用事件发布者泛型扩展类Nop.Services.Events.EventPublisherExtensions中的扩展方法

_eventPublisher.EntityUpdated(customer);

如

public virtual void UpdateCustomer(Customer customer)

        {

            if (customer == null)

                throw new ArgumentNullException("customer");

 

            _customerRepository.Update(customer);

 

            //event notification

            _eventPublisher.EntityUpdated(customer);

        }

2、Nop.Services.Events.EventPublisherExtensions中的扩展方法调用EventPublisher : IEventPublisher 事件发布者及接口

public virtual void Publish<T>(T eventMessage)

        {

            var subscriptions = _subscriptionService.GetSubscriptions<T>();

            subscriptions.ToList().ForEach(x => PublishToConsumer(x, eventMessage));

        }

（1）   public IList<IConsumer<T>> GetSubscriptions<T>()

        {

//获取所有实现<IConsumer<T>的消费者，其中T为InsertEntity<Order>类似的具体对象

            return EngineContext.Current.ResolveAll<IConsumer<T>>();

        }

（2）PublishToConsumer(x, eventMessage))

x.HandleEvent(eventMessage);调用Consumer的HandleEvent方法 如Nop.Services.Catalog.Cache. PriceCacheEventConsumer