Cache2k core implementation of the cache expiration mechanism in the framework

Cache2k is a high -performance, low -delayed Java cache library. It has flexible configuration options and multiple cache strategies, including the cache expiration mechanism. The cache expiration is an important mechanism for managing the data life cycle in the cache.It ensures that the data in the cache is ineffective when it is appropriate to store the latest data or avoid storing expired data.Cache2k provides a variety of strategies and options to define the expired behavior of cache. The cache expiration mechanism with the cache2k is very simple.First, we need to define the data type stored in the cache.For example, let us create a physical type that represents the user: public class User { private String id; private String name; public User(String id, String name) { this.id = id; this.name = name; } // Getters and setters // ... } Next, we need to create a Cache2k cache instance and set the cache configuration option when creating.Including the expiration settings of the cache.The following is an example: import org.cache2k.Cache; import org.cache2k.Cache2kBuilder; import org.cache2k.expiry.ExpiryTimeValues; import java.util.concurrent.TimeUnit; public class Main { public static void main(String[] args) { Cache<String, User> cache = Cache2kBuilder.of(String.class, User.class) .expireaFTERWRIITE (10, Timeunit.minutes) // Expired time is 10 minutes .expireAFTERACCESS (5, Timeunit.minutes) // No access time is 5 minutes .expirypolicy (ExpirytimeValues.createMaxValue ()) // .build(); // Put the data into the cache User user1 = new User("1", "Alice"); cache.put("user1", user1); // Obtain data from the cache User cachedUser = cache.get("user1"); System.out.println(cachedUser.getName()); } } In the above example, we created a cache with an expiration strategy for 10 minutes, that is, the data in the cache will expire after 10 minutes.At the same time, we also set up 5 minutes without access, which means that if no data in the cache data is not accessed within 5 minutes, the data will also expire.We can also use a customized expiration strategy, such as `ExpiRytimeValues.CreateMaxValue ()` indicates that the data will never expire. At the appropriate time, Cache2K will automatically process expired data to ensure that we always get the latest data or avoid expired data.We can put the data into the cache through the method of `Cache.put (key, value), and then use the` Cache.get (key) "method to obtain the data from the cache. All in all, Cache2k provides a flexible and easy -to -use cache expiration mechanism.We can set up different expiration strategies according to demand to ensure that the data in the cache always maintain the latest.Using Cache2k, we can easily achieve high -performance, low -delay cache systems.