Introduction to Autoservice Processor framework in Java Library

Autoservice Processor is a commentary processor framework in the Java class library to help developers automatically generate META-Inf/Services/Services/Services/Services/.It is part of Google's open source, which is mainly used to simplify the implementation of SPI. In Java, SPI is a mechanism for extending frameworks or libraries.It separates the interface from implementation, allowing developers to expand the function of the application by listing the implementation class in the configuration file.However, manual management of these configuration files will become tedious and easy to make mistakes.The purpose of Autoservice Processor is to help developers automate to generate these configuration files and simplify the implementation process of SPI. It is very simple to use Autoservice Processor.First, use the @Autoservice annotation on the interface to identify the interface as a service provider interface.Then use the compiler to compile, and use the Autoservice annotation processor in the code generated by the compiler.The processor scan all interfaces with @Autoservice comments and automatically generate the corresponding configuration file. The following is an example code, which demonstrates how to use Autoservice Processor: // Define the service provider interface public interface MyService { void doSomething(); } // Lag on the interface @Autoservice Note @AutoService(MyService.class) public class MyServiceImpl implements MyService { @Override public void doSomething() { System.out.println("Doing something..."); } } 在编译时，AutoService Processor会生成META-INF/services/MyService配置文件，并将MyServiceImpl类的全限定名写入该文件，以便让框架或库能够发现和加载MyServiceImpl实例作为MyService的实现。 The advantage of using Autoservice Processor is that it simplifies the implementation process of the service provider interface.Developers no longer need to manually maintain the configuration file, just use the @AutoserVice annotation in the code, and the configuration file automatically generated by the compilation to achieve SPI.In this way, developers can focus more on the realization of business logic without spending extra energy to manage configuration files. To sum up, Autoservice Processor is an annotation processor framework that can automatically generate the configuration file that can automatically generate the service provider interface, which simplifies the implementation of the SPI.Its use is very simple, just use @Autoservice annotations on the interface, and then automatically generate the SPI function by compiling the configuration file.