Cache2k core implementation of the cache loading mechanism in the framework

Cache2k is a high -performance Java cache library that provides a fast and reliable cache loading mechanism.In the core implementation of Cache2K, the cache loading mechanism is a very important part of it, which allows users to load logic in the lack of barriers in the cache as needed. The core idea of the cache loading mechanism is that when the keys in the cache do not exist, the Cache2k will entrust the loader provided by the user to obtain and load the cache item.This loader can be customized for the Cacheloader interface, or it can be defined by the Lambda expression of the Java 8. Let's take a look at a simple example to demonstrate the use of cache loading mechanism in the cache2k: First, we need to add the dependencies of the cache2k library.In the Maven project, it can be achieved by adding the following dependencies to pom.xml: <dependency> <groupId>org.cache2k</groupId> <artifactId>cache2k-api</artifactId> <version>2.2.0.Final</version> </dependency> Next, we need to define a loader to load the cache item.Create a class called CustomCacheloader and implement the Cacheloader interface: import org.cache2k.Cache; import org.cache2k.CacheLoader; import org.cache2k.CacheLoaderException; import org.cache2k.integration.CacheLoaderExceptionPropagator; public class CustomCacheLoader implements CacheLoader<String, String> { @Override public String load(String key) throws Exception { // Customized loading logic // Return to the key to the key or perform the corresponding calculation } } Next, we can use the loader to create and configure a new Cache2k cache instance: import org.cache2k.Cache; import org.cache2k.Cache2kBuilder; public class CacheLoadingExample { public static void main(String[] args) { Cache<String, String> cache = Cache2kBuilder.of(String.class, String.class) .loader(new CustomCacheLoader()) .build(); // Use the cache String value = cache.get("key"); System.out.println(value); } } In the above example, we first created a Cache2kbuilder instance, and then set the custom cacheLoader using the loader () method.Since then, we can use the GET () method to detect the value from the cache. If the value does not exist in the cache, Cache2k will call CustomCacheloader's load () method to load the value. In this way, the cache loading mechanism of Cache2K allows us to customize the loading logic of the cache item as needed, thereby improving the performance and scalability of the application. To sum up, the cache loading mechanism in the Cache2K core implementation framework is a key component, which allows users to load logic as required to customize the lack of bar in the cache as needed.By implementing the cacheLoader interface and configured it in the Cache2k instance, we can easily handle the loading of the cache item.In this way, we can achieve better performance and scalability when storing and accessing data in the cache.