The principle and design ideas of the Arez Annotations framework

Arez Annotations framework is a Java framework for simplifying application state management.It is based on the concept of reactive programming and aims to provide an elegant and simple way to handle the state changes in the application. Design ideas: 1. Reacting programming: Arez Annotations framework uses the principle of reaction programming to represent the state of the application as an observed object (Observable).When the state changes, Observer is notified and updated the corresponding logic.This idea based on the observer mode makes status management more flexible and scalable. 2. Note Driver: Arez Annotations Framework uses Java's Annotation's function to simplify the development process.Developers only need to add corresponding annotations to the code, and the framework can automatically process the logic of changes in status and the notification of the observer, thereby reducing the manual writing a large number of template code. 3. Treatment during compilation: In order to improve performance and code quality, the Arez Annotations framework puts the processing logic of status management during compilation.By using Java's Annotation Processor function, the framework can automatically generate the corresponding code during the code compilation stage, thereby avoiding the performance loss and potential errors during runtime. 4. Status tracking: Arez Annotations framework provides a convenient way to track the state changes of the application.By introducing a special object type called "Observables", developers can accurately specify which states need to be tracked, thereby avoiding meaningless state change notifications and updates. Example code: Below is a simple example, showing how to use the Arez Annotations framework to manage the state of the application: import arez.annotations.ArezComponent; import arez.annotations.Observable; @ArezComponent public class Counter { private int count; @Observable public int getCount() { return count; } public void setCount(int count) { this.count = count; } } In the above code, the Counter class uses the annotation of the Arez Annotation S frame to mark it as an observed component.Among them, the@ArezcomPonent annotation indicates that the class is a component,@oservable annotation is used to mark the getCount () method, indicating that it is an observed state. After using this framework, we can add an observer to other logic to monitor the state changes of the counter object and perform corresponding logical updates. Summarize: The Arez Annotations framework provides a simple and powerful way to manage the application state by using reactive programming and annotation driven design ideas.Its compilation and state tracking function enables developers to better control and optimize the code and improve the performance and maintenance of applications.