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Initiation Dispatcher: This is actually the Reactor role. It defines some specifications, which are used to control the scheduling mode of events, and at the same time provide facilities for applications to register and delete event handlers. It itself is the core of the entire event handler, and Initiation Dispatcher waits for events to occur through Synchronous Event Demultiplexer. Once an event occurs, the Initiation Dispatcher first separates each event, then calls the event handler, and finally calls the relevant callback method to handle these events. Each callback method in Netty's ChannelHandler is called by an EventLoop in BossGroup or WorkGroup.The combination mode is also called part-to-whole mode. The combination mode combines objects into a tree structure, which is used to represent the relationship between the whole and the part. The combination mode enables clients to treat individual objects and combined objects equally. For example, in. NET, simple controls such as WinForm controls, TextBox and Label inherit from the Control class, while composite controls such as GroupBox also inherit from the Control class. The specific structure diagram of the combination mode is shown below.Explain the template method mode, which means: in an abstract class, there is a main method, and then define 1... n methods, which can be abstract or actual methods, define a class, inherit the abstract class, override the abstract method, and realize the call to subclasses by calling the abstract class. First look at a diagram:背水一战。他们是因为彭城之战，家乡遭毁的人，实在是厌倦了北上经常的战乱。学校发生连环杀人事件，受害者都是离奇死亡。到底谁是幕后凶手？破案率高超的青年警员郭少将参与了此连环离奇死亡案件，郭少将拥有“后瞻”的超能力。查此案中发现案件不是一般人类想象的简单。并发现这所学校有许多学生也拥有不为人知的超能力。郭少将在调查过程中，聚集拥有“预知能力”、“分身术”、“瞬间移动”、“读心术”的学生组成一支异能队，巧妙玄机的侦查凶案。却不知事件背后是狄少受魔帝指使利用“时间静止”超能力杀人。异能队各大成员发挥自己的超能力一步步接近事情的真相。魔帝的杀人动机是什么？"They need to make a flexible assessment of their systems and ensure that their service providers are ready to deal with potential attacks and can provide them with adequate protection," she concluded.