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Event Handler: It consists of multiple callback methods, which constitute an application-related feedback mechanism for an event. There is no event handler mechanism in the Java NIO field for us to call or make callbacks, but we write our own code. Netty has made an upgrade in the role of event handler compared with Java NIO. It provides us developers with a large number of callback methods for us to implement corresponding callback methods for business logic processing when specific events are generated, namely ChannelHandler. The methods in ChannelHandler correspond to callbacks to each event.《海绵宝宝：营救大冒险》讲述了海绵宝宝心爱的宠物小蜗被绑架后，海绵宝宝和派大星前往失落的大西洋城展开营救冒险的故事。在这场充满危险又妙趣横生的营救行动中，海绵宝宝和他的朋友们用实际行动证明了友谊的力量无限大！At 4 a.m. the next day, Daguan wanted to end up with everyone and one person was missing.Mark said it was disconsolate that the PC was not updated.天下舰船数以万计，谁不知东方满地皆黄金？谁不知搞几艘船就可以贩货？可大多数人知道了也没有办法，因为马六甲在弗朗机手中，他们远比收过路费的新加坡要贪婪，除本国指定人外，其余舰船想都甭想，皆为走私。