In-depth understanding of the technical principles of JSR107 API and SPI frameworks in the Java library

In -depth understanding of the technical principles of the JSR107 API and SPI framework in the Java library Overview: The JSR107 API in the Java class library is part of the Java Caching API, which aims to provide Java applications with unified, scalable and insertable cache interfaces.This API defines a set of standard interfaces that interact with various cache implementation (such as memory cache, database cache, etc.).In addition, the JSR107 also introduces SPI (Service Provider Interface) framework to achieve seamless integration with cache realization. Technical principle: The design of the JSR107 API is based on standard Java interfaces and annotations, providing a set of clear and simple cache access methods.It includes the following main components: 1. CacheManager: Responsible for creating, configuration and management cache examples.You can create and obtain a Cachemanager instance by configure files or programming methods. 2. Cache (cache): indicates a specific cache instance that stores data on the form value pair.You can obtain an existing cache instance or create a new cache instance through cachmanager. 3. Key and value: Objects used to store and obtain data in cache.The keys and values can be any Java object, but the Serializable interface must be implemented in order to be serialized and deepened. The JSR107 SPI framework is a mechanism for extending or replacing the default implementation.Through SPI, developers can realize their own cache managers, cache loaders, cache memory and other components to meet specific cache needs. The following is a simple example. It demonstrates how to use the JSR107 API and SPI framework: // Import the required class import javax.cache.Cache; import javax.cache.CacheManager; import javax.cache.Caching; import javax.cache.spi.CachingProvider; // Create a cache manager CachingProvider cachingProvider = Caching.getCachingProvider(); CacheManager cacheManager = cachingProvider.getCacheManager(); // Create a cache instance Cache<String, Integer> cache = cacheManager.createCache("myCache", new MutableConfiguration<>()); // Storing data cache.put("key1", 100); cache.put("key2", 200); // retrieve data Integer value1 = cache.get("key1"); Integer value2 = cache.get("key2"); System.out.println ("Value1:" + Value1); // Output: Value1: 100 System.out.println ("Value2:" + Value2); // Output: Value2: 200 In the above example, we first obtain the cachingProvider through the Caching class, and then use the provider to obtain the CacheManager instance.Then, we use cacheManager to create a cache instance called "MyCache" and store two pairs of key values pairs through the PUT method.Finally, we obtained the stored data through the get method and printed them. Summarize: Through the JSR107 API, developers can easily interact and operate with various caches to improve the performance and scalability of the application.The SPI framework provides developers with the ability to customize and expand cache components to meet different cache needs.Understanding and mastering the technical principles of the JSR107 API and SPI framework is very important for Java developers.