In -depth understanding of the technical principles of the Circumflex Cache framework in the Java class library
In -depth understanding of the technical principles of the Circumflex Cache framework in the Java class library
Overview:
Circumflex Cache is a Java -based high -performance cache framework to accelerate data access and improve the response speed of the system.It is a cache framework based on memory, which can cache data in the application to avoid repeated calculation or database access, thereby improving system performance.This article will explore the technical principles of the Circumflex Cache framework.
1. Cache concept and working principle:
The cache is a storage medium that is used for temporary storage data to accelerate the speed of subsequent access.The Circumflex Cache framework stores data in memory to provide fast and efficient access.
Circumflex cache working principle is as follows:
-Son when the application needs to obtain data, first check whether the data exists in the cache.If the data exists in the cache, the result is returned directly.
-If the data does not exist in the cache, obtain data from the data source (such as database) and store it in the cache for future access and use.
2. Circumflex Cache core component:
Circumflex Cache framework contains the following core components:
-Cache Manager: Responsible for managing the entire cache framework, including creating and destroying cache, and processing the cache life cycle.
-Cache Interface: Provide applications with methods and operations of caching access.It includes a series of APIs to store, obtain, update, and delete data from cache.
-Cache Implementation: Use different cache strategies and algorithms to achieve cache according to specific needs and business scenarios.Circumflex Cache provides multiple cache implementations, such as LRU (recently used) and FIFO (advanced first).
-Cache Configuration File: It is used to configure the attributes and behaviors of the cache.By configured files, you can specify the cache size, failure time, and clear strategy.
3. Example code:
The following is a simple example code that demonstrates how to use the Circumflex Cache framework:
import com.googlecode.cqengine.ConcurrentIndexedCollection;
import com.googlecode.cqengine.IndexedCollection;
import com.googlecode.cqengine.index.navigable.NavigableIndex;
import com.googlecode.cqengine.index.unique.UniqueIndex;
import com.googlecode.cqengine.query.Query;
import com.googlecode.cqengine.query.option.QueryOptions;
public class CircumflexCacheExample {
public static void main(String[] args) {
// Create a cache collection
IndexedCollection<User> cache = new ConcurrentIndexedCollection<>();
// Add data to the cache
cache.addIndex(NavigableIndex.onAttribute(User.NAME));
cache.addIndex(UniqueIndex.onAttribute(User.ID));
cache.addAll(getUsersFromDataSource());
// Obtain data from the cache
Query<User> query = User.NAME.startsWith("John");
Iterable<User> users = cache.retrieve(query);
// Output results
for (User user : users) {
System.out.println(user);
}
}
private static List<User> getUsersFromDataSource() {
// Obtain user data from the data source
// ...
}
}
class User {
private int id;
private String name;
// Other attributes and methods
// Construct function, Getter and Setter omit
}
In the above example code, we first created a cache collection `indexedCollection` and added indexes to it.Then obtain user data from the data source and add it to the cache.Finally, we use query conditions to retrieve user data from the cache and print the results.
Through this simple example, you can experience the convenience and efficiency of the Circumflex Cache framework. Through a reasonable cache strategy, you can greatly improve the system's response speed.
Summarize:
Circumflex Cache framework is a high -performance Java cache framework that uses memory cache data to improve system performance and response speed.This article introduces the technical principles and core components of Circumflex Cache, and provides a simple example code to help readers better understand and use this framework.I hope this article can help you in depth to understand the Circumflex Cache framework!
