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FlyWeightFactory is responsible for creating and managing meta-units. When a client requests, the factory needs to check whether there are eligible objects in the current object pool. If so, it returns the existing object. If not, it creates a new object. FlyWeight is a superclass. When it comes to shared pools, It is easy to think of JDBC connection pooling in Java, Considering the characteristics of each connection, It is not difficult for us to sum up: Applies to several objects that are shared, They have some common attributes, Take the database connection pool as an example, url, driverClassName, username, password and dbname, these attributes are the same for each connection, so it is suitable to use the meta-sharing mode to process, build a factory class, take the above similar attributes as internal data and the others as external data, and pass them in as parameters when calling methods, thus saving space and reducing the number of instances.Canoe佘太君亲率众将出征边关，誓死破除天门阵。领军元帅的人选迟迟未定，杨八妹和穆桂英，一个精通兵法、一个善于布阵，一个征战边关多年深得将士信赖，一个统领穆柯寨拥有帅才之能，老太君权衡利弊最终决定任命穆桂英为三军统帅。⑤ Initiation Dispatcher triggers the callback method of the event handler to respond to the Handle in the ready state. When an event occurs, the Initiation Dispatcher will use the Handle activated by the event source as a "key" to find and distribute the appropriate event handler callback method.Four days after the post was posted, Xu Zhixian, who appeared in the news studio of South Korea's JTBC TV station, told his original intention in a trembling voice. "I just want to say to the victims of sexual violence, 'This is not your fault'. It took me eight years to realize this".Comparison of True and False Trademarks