EHCACHE Spring Annotations Core framework technical analysis and actual combat

EHCACHE is an open source cache framework widely used in Java applications, which provides an efficient cache management solution.Combined with the Spring Annotations Core framework, EHCACHE can be integrated easier and cached management.This article will analyze the technical principles of the EHCACHE Spring Annotations Core framework and provide a practical example. ## Ehcache Introduction EHCACHE is a Java -based open source cache framework that can store data in memory to speed up access.EHCACHE provides a variety of cache strategies, such as LRU (recently used), LFU (at least often), and FIFO (advanced first).In addition, EHCACHE also supports the persistence of cache and provides a distributed cache solution. ## Spring Annotations Core Framework Introduction Spring Annotations Core framework is a core module in Spring Framework to simplify the development of applications.It reduces the model code by annotations and meta -'solutions, and improves the readability and maintenance of code.The Spring Annotations Core framework also provides commentary AOP -based support (facing cut -out programming) support, making it easier for developers to achieve horizontal section attention in applications. ## EHCACHE Spring Annotations Core Framework Principles EHCACHE Spring Annotions Core framework integration is mainly based on the Spring AOP principle, and cache management is achieved by adding annotations to the method.Before the original method is called, the AOP interceptor will first check whether there is corresponding data in the cache.If you exist, return the data in the cache directly, otherwise the original method is executed and the result is stored in the cache. EHCACHE Spring Annotations Core framework implements cache management through the following key annotations: 1. `@cacheable`: The return value used for marking methods should be cached.When the method is called, the AOP interceptor will first check whether there are corresponding data in the cache.If there is a cache data in the cache, the execution method is executed and the result is stored into the cache. 2. `@cacheevict`: The return value used for the mark method should be deleted from the cache.It can be used to remove specific data items or clear the entire cache. 3. `@cachePut`: The return value used for marking methods should be updated into the cache.It is different from the annotation of `@cacheable` that the method is executed when each method is called and the result is stored into the cache. ## EHCACHE Spring Annotations Core Framework Example The following is an example code that demonstrates how to use EHCACHE Spring Annotations Core framework in Spring applications for cache management. First, you need to configure the EHCACHE cache manager: @Configuration @EnableCaching public class CacheConfig { @Bean public EhCacheManagerFactoryBean ehCacheManagerFactoryBean(){ EhCacheManagerFactoryBean cacheManagerFactoryBean = new EhCacheManagerFactoryBean(); cacheManagerFactoryBean.setConfigLocation(new ClassPathResource("ehcache.xml")); cacheManagerFactoryBean.setShared(true); return cacheManagerFactoryBean; } @Bean public EhCacheCacheManager ehCacheCacheManager(EhCacheManagerFactoryBean factoryBean){ return new EhCacheCacheManager(factoryBean.getObject()); } } Next, you need to use the corresponding annotation in a way to be cached: @Service public class MyService { @Cacheable(value = "myCache", key = "#id") public MyObject getById(Long id) { // Obtain data from the database or other data sources and return } @CacheEvict(value = "myCache", key = "#id") public void deleteById(Long id) { // Delete data from the database or other data sources } @CachePut(value = "myCache", key = "#myObject.id") public MyObject update(MyObject myObject) { // Update data and return } } Introduce the cache configuration in the application's Spring configuration file: <cache:annotation-driven /> <bean id="cacheManager" class="org.springframework.cache.ehcache.EhCacheCacheManager"> <constructor-arg ref="ehCacheManager"/> </bean> <bean id="ehCacheManager" class="org.springframework.cache.ehcache.EhCacheManagerFactoryBean"> <property name="configLocation" value="classpath:ehcache.xml"/> </bean> Now, when the `Getbyid` method is called, if there is no corresponding data in the cache, the method will be executed and the result is stored into the cache.When the `Deletebyid` method is called, the data corresponding to the given key during the cache will be deleted.When calling the `update` method, not only the method is executed, but the new results will also be stored in the cache. This is the basic principles and examples of cache management using EHCACHE Spring Annotations Core framework. Through EHCACHE Spring Annotations Core framework, we can easily integrate EHCACHE and use annotations to manage cache.This greatly simplifies the process of cache management and improves the performance and maintenance of applications.