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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.上古禁決，生死爭奪競存亡。The Sports biographical drama on indian-haryana based boxer Sultan Ali Khan.　　该剧讲述了一个努力生活只求安稳的平凡女性，面对丈夫的背叛与恶意，生活的重担和磨难，完成了一场完美的自我拯救的故事D战》根据真实案例改编，是首部展现中国网络警察国际执法的电影，影片讲述了中国网络警察运用高科技手段展开缜密侦查，最终成功缉捕犯罪嫌疑人，摧毁黑客组织的惊险故事。