Apache Yetus Audience Annotations in the Java Library

Apache Yetus Audience Annotations in the Java Library Apache Yetus is a tool set of the Apache Software Foundation to support code quality assurance and automation tasks in the software development process.Among them, Audience Annotions is a feature that is used to identify expected users of different methods and classes in the Java class library.This article will introduce how to use Apache Yetus Audience Annotations in the Java library and provide several example code to illustrate the practice method. 1. Understand Audience Annotations Apache Yetus Audience Annotations provides a simple way to associate the method and class in the Java class library with its expected users.By adding these annotations, developers can clearly indicate which methods and classes should be used by them.The advantage of this is that developers can optimize code implementation according to the needs of users and use scenarios, and better perform documentation, error handling and version control. The following is several annotations available in Apache Yetus Audience Annotations: -@Public: It means that this method or class can be visible to all users and is stable and reliable.If you need to disclose API, you should use this annotation. -@Limiteddprivate: It means that the method or class is visible to a set of specific users or modules.These users or modules are specified by the optional value of the annotation. -@Private: This method or class is for internal use and should not be cited by external users. 2. Practical guide to use Audience Annotations in the Java library Below is a practical guide to use Apache Yetus Audience Annotations in the Java library: 2.1 Add dependence First, you need to add the corresponding dependencies of Apache Yetus to the project.You can add the following dependencies in the configuration file of your construction management tools (such as Maven or Gradle): <dependency> <groupId>org.apache.yetus</groupId> <artifactId>audience-annotations</artifactId> <version>1.0.0</version> </dependency> 2.2 Add annotations to the method and class Next, you can add appropriate annotations to the target method and class.According to your needs, you can choose to use@Public,@LimitedPriving or @private.The following are several examples: import org.apache.yetus.audience.InterfaceAudience; @InterfaceAudience.Public public class PublicClass { // Category of public methods } @InterfaceAudience.LimitedPrivate({"module1", "module2"}) public class LimitedClass { // Limited module can be visited by the module } @InterfaceAudience.Private public class PrivateClass { // Internal use class } @InterfaceAudience.Public public void publicMethod() { // Public method implementation } @InterfaceAudience.LimitedPrivate({"module1", "module2"}) public void limitedMethod() { // The method of seeing a limited module can be implemented } @InterfaceAudience.Private public void privateMethod() { // Internal method implementation } 3. The advantage of using Audience Annotations By using Apache Yetus Audience Annotations in the Java library, you can get the following advantages: -Beying documentation: By clearing the audience of the specified method and class, you can write a document more clearly so that users can better understand how to use them correctly. -P better error processing: You can better process and report error information according to the different needs of the user.For example, for public methods, you can provide more friendly errors; for private methods, you can ignore or only output debugging information. -Bomery version control: By connecting different methods and classes with different audiences, you can manage and control the version more targetedly.It can be implemented on the public API, and the method and class of internal use can be implemented more freely changes. In summary, Apache Yetus Audience Annotations provides a simple and effective way to help developers precisely define methods and classes in the Java class library.Using these annotations can optimize code implementation, provide better documentation and error processing, and better manage the version.This will help the development of maintenance, easy -to -use and reliable Java libraries.