Exploring the technical implementation principle of the Circumflex Cache framework in the Java library

Explore the technical implementation principle of the technology implementation of the Circumflex Cache framework in the Java library introduction: In Java development, cache is one of the important technical means to improve application performance and response speed.Circumflex Cache framework is a powerful and easy -to -use Java class library, which provides a simple and efficient cache solution.This article will explore the technical implementation principles of the Circumflex Cache framework, including its underlying data structure, cache strategy, and data access process. 1. Overview of Circumflex Cache framework The Circumflex Cache framework is a memory -based cache library, which aims to provide high -performance cache support for Java applications.It avoids frequent access to databases or other external resources by cache data, which significantly improves the performance and response speed of the application.The Circumflex Cache framework provides a simple API that allows developers to easily create, read and update cache data. 2. Circumflex Cache underlying data structure The underlying data structure of the Circumflex Cache framework uses the hashmap and a double -way linked list.The hash table is used to quickly find the cache item, while the two -way linked list is used to maintain the access order of the cache item.Each cache item contains a key (key) and a value, stored in the hash table.At the same time, each cache item also contains two pointers, pointing forward and the latter cache item in order to maintain the access order. 3. Circumflex Cache cache strategy The Circumflex Cache framework supports two common cache strategies: LRU (Least Recently Used, recently used at least) and LFU (Least Frequently Used).Developers can choose suitable cache strategies according to actual needs.The LRU strategy eliminates the recent cache items that have been used at least from the cache, while the LFU strategy is eliminated according to the frequency of the use of the cache item.The Circumflex Cache framework uses the LRU strategy by default. Fourth, Circumflex Cache data access process The data access process of the Circumflex Cache framework mainly includes two operations: reading and updating the cache item.First, when the application needs to read the data from the cache, the framework will find the corresponding cache item in the hash table according to the given key.If the cache item is found, the frame will return the value of the cache item and move the cache item to the head of the two -way linked list to indicate the recent use.If the cache items are not found, data is required to read data from external resources (such as databases) and add data to the cache. Secondly, when the application needs to update the data in the cache, the framework will find the corresponding cache item in the hash table based on the given key.If you find the cache item, the frame will update the value of the cache item and move the cache item to the head of the two -way linked list.If the cache item is not found, you need to create a new cache item in the cache and add it to the head of the hash table and the two -way linked list. Below is an example code that uses the Circumflex Cache framework: import com.circumflex.cache.Cache; import com.circumflex.cache.CacheBuilder; public class CacheExample { public static void main(String[] args) { // Create a cache instance Cache<String, String> cache = CacheBuilder.newBuilder() .maximumsize (100) // Set the maximum capacity of the cache .build(); // Put the data into the cache cache.put("key1", "value1"); cache.put("key2", "value2"); // Read data from the cache String value1 = cache.getIfPresent("key1"); System.out.println (Value1); // Output: Value1 // Update data from the cache cache.put("key1", "new value1"); String updatedValue1 = cache.getIfPresent("key1"); System.out.println (updatedvalue1); // Output: New Value1 } } This example code demonstrates how to create, read, and update the cache data with the Circumflex Cache framework.Through the Cachebuilder builder, we can set the maximum capacity of the cache and use the PUT method to put the data into the cache.Using the Getifrence method to read the data from the cache. If the corresponding cache item cannot be found, return NULL.Update the cache data is also very simple, just call the PUT method again. Summarize: The Circumflex Cache framework is a powerful and easy -to -use Java class library, which provides a simple and efficient cache solution.By adopting the underlying data structure of the hash table and the two -way linked list, the two common cache strategies of LRU and LFU are supported, and fast data access is achieved through simple APIs.Developers can choose the Circumflex Cache framework according to the actual needs as the application of the application to improve the performance and response speed of the application.