Detailed explanation of the technical principles of EHCACHE Spring Annotations Core framework in the Java library

EHCACHE Spring Annotations Core framework in the Java Library EHCACHE is an open source Java library for providing cache support.It can efficiently manage objects in memory and provide fast access and response time.The combination of EHCACHE and Spring Annitations Core framework provides developers with a simple and flexible method to use the cache mechanism to improve the performance of the application. The main goal of EHCACHE Spring Annotations Core (hereinafter referred to as EHCACHE Annotations) is to separate the cache logic from business logic and achieve cache configuration and management through annotations.Developers can define cache behavior by adding specific annotations to the method of Spring management. EHCACHE Annotions provides some core notes that can be divided into two categories: cache creation and cache update. First, let's take a look at the core annotation of cache creation: 1. @cacheable: This annotation can be cached for the results of the indicator method.Each call with this annotation method will first check whether there are corresponding results in the cache.If you exist, return the cache result directly without performing the actual method logic.If it does not exist, the logic of the method will be executed and the result is stored in the cache. 2. @cacheevict: This annotation is used to remove related cache items after the indicator method is executed.You can use this annotation to remove a single cache item, or you can use a pass to clear a set of cache items.For example, when updating or deleting a certain object, @cacheevict can be used to ensure that the related cache is cleared. 3. @cachepput: This annotation is used to force the result to the cache after the method execution is enforced, whether or not it exists.Unlike @cacheable comments,@cacheput comments always execute method logic and store the results in the cache. Then, let's take a look at the core annotation of the cache update: 1. @cacheupdate: This annotation is used to update related cache items after the indicator method is executed.Unlike @cacheable comments,@cacheupdate notes will not check whether there are results in the cache.It always executes method logic and stores the results in the cache. In addition to the above annotations, EHCache Annotations also provide other comments, such as@cachedefaults,@cacheResult,@cacheRemove,@cacheRemoveal, etc., to define caching behaviors more flexibly. The principle of implementing EHCACHE Annotations is to intercept the method of comments by using AOP (facing -oriented programming) in Spring, and read, write, update, and clear at the appropriate time point.When running, Spring will generate an agent object to intercept the method call and perform cache -related operations according to the type and configuration of the annotation before the target method is performed. The following is a simple example, demonstrating how to use EHCACHE Annotations to configure and use cache in Spring: @Service public class BookService { @Cacheable(cacheName = "books") public Book getBook(String isbn) { // Fetch book details from database // ... return book; } @CachePut(cacheName = "books") public void saveBook(Book book) { // Save book details to database // ... } @CacheEvict(cacheName = "books", allEntries = true) public void deleteBook(String isbn) { // Delete book details from database // ... } } In the above example, the note of@cacheable` is used to query the details of the books and cache the result.If you query the same books again, the results will be obtained directly from the cache without performing actual database queries.`@CachePut` Note used to preserve books details. It always executes method logic and stores the result in the cache.`@Cacheevict` Note to delete books details, which will clear the corresponding entries in the cache at the same time. By using EHCACHE Annotations, developers can easily integrate the cache mechanism into the Spring framework, and use simple annotation configuration to improve the performance and response time of the application. Summary: The technical principles of EHCACHE Spring Annotations Core framework in the Java library are to configure and manage cache behaviors by combining EHCACHE and Spring AOP mechanisms.By using different annotations, developers can define the creation, update and clear behavior of cache, thereby improving the performance and response time of the application. I hope this article will help you understand the technical principles of EHCACHE Spring Annotations Core framework.