The technical principles of the JSR107 API and SPI framework in the Java class library

JSR-107 is an important standard in the Java world that is used to define the API and SPI framework for defining the cache system.This article will introduce the technical principles of JSR-107 and provide some Java code examples. 1. What is JSR-107? The JSR-107 defines the API specification of the Java cache system, enabling developers to use cache more easily in applications.It also defines a SPI (Service Provider Interface) framework that allows different cache to achieve specific implementation of suppliers. 2. API The JSR-107 API defines an interface that interacts with cache.Developers can use these interfaces to create, configure, access and manage cache instances.Here are some common interfaces: -javax.cache.cache: indicates a cache instance. -javax.cache.cachemanager: Factory categories used to create and manage cache instances. -javax.cache.configuration.configuration: interface used to configure the cache instance. -javax.cache.cacheloader and javax.cache.cachewriter: The interface used to customize cache loading and writing. -javax.cache.event.cachentryListener: The interface used to monitor the change of the altoscular change. This is an example of creating and using the cache using the JSR-107 API: // Create a cache manager CacheManager cacheManager = CacheManager.getInstance(); // Create a cache configuration MutableConfiguration<String, Integer> config = new MutableConfiguration<>(); config.setTypes(String.class, Integer.class); // Create a cache instance Cache<String, Integer> cache = cacheManager.createCache("myCache", config); // Write data to the cache data cache.put("key", 100); // Read data from the cache Integer value = cache.get("key"); 3. SPI framework The SPI framework of JSR-107 allows cache to achieve specific implementation of suppliers.This SPI framework defines some interfaces and annotations for suppliers to achieve and expand.Here are some important interfaces and annotations in the SPI framework: -javax.cache.spi.cachingProvider: It means a cache provider. -javax.cache.configuration.Factory: Factory interfaces used to create and configure cache instances. -javax.cache.annotation.cacheresult, javax.cache.annotation.cachepput and javax.cache.annotation.cacheremove interfaces are used to enable cache annotations at the method level. -javax.cache.spi.cachewriter and javax.cache.spi.cacheloader: Used to provide a custom cache writing and loaded interface. The following is an example of a custom cache realized supplier: // Create a supplier to implement the CachingProvider interface public class MyCachingProvider implements CachingProvider { // Implement the method in the interface ... } // Create a custom cache writer to implement the Cachewriter interface public class MyCacheWriter implements CacheWriter<String, Integer> { // Implement the method in the interface ... } In summary, the JSR-107 provides a standard API and SPI framework to make the use cache easier.Developers can use the JSR-107 API to create and manage cache instances. At the same time, suppliers can use the SPI framework to provide specific cache implementation.This standard is widely used in Java applications and brings convenience to the development and integration of the cache system.