"Circumflex Cache" framework of technical principles in the Java class library detailed explanation
"Circumflex Cache" framework of technical principles in the Java class library detailed explanation
introduction:
In Java development, cache is one of the important means to optimize application performance.Circumflex Cache is a high -performance Java cache framework, which provides a simple, flexible and scalable way to achieve an object cache.This article will introduce the technical principles of the Circumflex Cache framework in the Java library, and explain the complete programming code and related configuration when necessary.
1. Framework Overview:
Circumflex Cache is an open source Java cache framework that uses high -efficiency memory data structures and algorithms to provide fast cache access.The framework allows developers to store data in memory and provide high -speed reading and writing operations.Circumflex Cache also provides a variety of cache management strategies, such as LRU (recently used), LFU (recently used most often), and FIFO (advanced first) to meet the needs in different application scenarios.
2. Technical principle analysis:
The core idea of Circumflex Cache is to achieve efficient cache access through the combination of the hashmap and double -way linked list.Specifically, in the Circumflex Cache, all the cache items are stored in the hash table in the form of key-value pair and maintain the sequence of cache items through a two-way linked list.
When a cache was accessed, the Circumflex Cache first found the item and returned its value through the hash table.At the same time, it mobilizes the access cache item to the head of the linked list to keep the latest access items at the forefront.This can ensure that the new access items are accessed faster in the memory.
If the cache is full and when the new cache item needs to be stored, the Circumflex Cache will delete the item of the linked list to storage new items.This process is called Cache Ev of Eviction, and different elimination strategies can achieve different cache management methods.
3. Programming example:
Here are a simple Java code example to demonstrate how to use the Circumflex Cache framework:
import com.circumflex.cache.Cache;
import com.circumflex.cache.Caches;
public class CacheExample {
public static void main(String[] args) {
Cache<String, Integer> cache = Caches.builder()
.maximumSize(100)
.build();
cache.put("key1", 10);
cache.put("key2", 20);
cache.put("key3", 30);
Integer value1 = cache.get("key1");
System.out.println("Value for key1: " + value1);
cache.invalidate("key2");
boolean containsKey = cache.containsKey("key3");
System.out.println("Contains key3: " + containsKey);
}
}
In this example, we used the Circumflex Cache framework to create a cache object.Use the caches.builder () method to build a new cache object.We set up the cache maximum capacity of 100 cache through the Maximumsize (100) method.
Then, we used the PUT () method to store three cache items to the cache, using "Key1", "Key2" and "Key3" as keys, respectively, and stored the corresponding integer values.
Next, we use the get () method to obtain the value in the cache through the key "key1" and print it.We then use the INVALIDATE () method to make the cache fail through the key "key2".
Finally, we use the containSkey () method to check whether the cache contains the key "key3" and print the result.
Through this example, you can initially understand the usage of the Circumflex Cache framework, and further configuration and expansion of it according to actual needs.
in conclusion:
Circumflex Cache is a high -performance, flexible and scalable Java cache framework.By using the combination of hash tables and two -way linked lists, it can quickly provide cache access and provide a variety of cache management strategies to meet different application needs.In actual development, you can use Circumflex Cache based on specific business scenarios to optimize the performance of the application.
