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For example, in Java, the Selector's select () method is used to implement this synchronous blocking operation waiting for an event to occur. In the implementation of select () under Linux operating system, a) will call epollCtl (epfd, opcode, fd, events) to register the events that have been registered in Initiation Dispatcher into Linux system, where fd means Handle and events means Handle events that we are interested in; B) Synchronize the occurrence of a blocked wait registered event by calling the epollWait method. Events on different event sources may occur at the same time. Once an event is triggered, the epollWait method will return. C) Finally, find the associated SelectorKeyImpl object by the event that occurred, set the event that occurred to the ready state, and then put the SelectorKeyImpl into the selectedSet. In this way, we can get the event-ready SelectorKeyImpl collection through the Selector.selectedKeys () method.倒不是她讲排场，而是后山就是青山书院，常有男子进进出出的，那些读书人又讲究礼数，小媳妇和少女自然要规避些。然后再让周勃之子周冠夫一路护卫，取道临江国南下。Reflective attacks typically use protocols that do not require authentication or handshake, The reflection attack needs to forge the source ip address of the requested data into the ip address of the target. If the protocol used requires authentication or handshake, the authentication or handshake process cannot be completed and the next attack cannot be carried out. Therefore, most reflection attacks are carried out by network services based on udp protocol.板栗见娘使劲给爹戴高帽子，爹乐得满脸开花，两人一副恩爱模样，忙一个劲地点头称是。Move许负以为自己要摔在冰冷的地上，可没想到接触到了是一片温暖，继而发现是尹旭温暖的胸膛。