Detailed tutorial on using JetCache cache in SpringBoot project

introduction

Spring Boot is a very popular Java development framework, and JetCache is an annotation-based high-performance caching framework. Connecting JetCache cache in Spring Boot project can improve system performance and concurrency capabilities.

This article will explain how to use JetCache cache in Spring Boot projects and provide a detailed case for how to configure and use JetCache.

1. Add dependencies

First of all,Add JetCache dependencies to the file:

<!-- JetCache -->
<dependency>
    <groupId></groupId>
    <artifactId>jetcache-starter-redis</artifactId>
    <version>2.6.0</version>
</dependency>

JetCache provides multiple different types of cache adapters, such as Redis, Caffeine, EhCache, etc. Select the appropriate adapter and add the corresponding dependencies.

2. Configure the cache adapter

Configuration files in Spring Boot project (or) configure the relevant parameters of the cache adapter. Take Redis adapter as an example:

# Redis cache adapter configuration=redis
=localhost
=6379
=

You can modify the above parameters according to the actual situation to make them adapt to your Redis instance.

3. Add cache annotation

On the methods that require cache use, add the cache annotation of JetCache. JetCache provides multiple annotations, such as@Cached、@CacheInvalidate、@CacheUpdateetc., used to cache the results of methods, fail caches and update caches.

@Service
public class UserService {
    
    @Cached(name = "userCache", key = "#id", expire = 3600)
    public User getUserById(int id) {
        // Query user information from the database        User user = (id);
        return user;
    }
    
    @CacheInvalidate(name = "userCache", key = "#id")
    public void deleteUserById(int id) {
        // Delete user information        (id);
    }
    
    @CacheUpdate(name = "userCache", key = "#", value = "#user")
    public void updateUser(User user) {
        // Update user information        (user);
    }
    
}

In the above code example,@CachedAnnotations are used for cachegetUserByIdThe result of the method,@CacheInvalidateAnnotations are used for failure cache,@CacheUpdateAnnotations are used to update the cache.

4. Test the cache effect

To verify the cache effect, you can write a simple controller to test it:

@RestController
public class UserController {
    
    @Autowired
    private UserService userService;
    
    @GetMapping("/user/{id}")
    public User getUser(@PathVariable int id) {
        return (id);
    }
    
    @DeleteMapping("/user/{id}")
    public void deleteUser(@PathVariable int id) {
        (id);
    }
    
    @PutMapping("/user")
    public void updateUser(@RequestBody User user) {
        (user);
    }
    
}

Start the Spring Boot application and access the /user/{id} interface to obtain user information. You can see that the first request will query the user information from the database and cache it. The subsequent request will directly obtain user information from the cache.

After calling the /user/{id} interface, call the /user/{id} interface and then find that the result has not changed, indicating that the cache has taken effect. When the /user/{id} interface is called and the /user/{id} interface is called, you will find that the result has changed, indicating that the cache has expired.

5. Summary

JetCache is a powerful and easy-to-use caching framework that enables high-performance caching with simple annotations and configurations. This article describes how to connect to JetCache cache in Spring Boot project and provides a detailed example of how to configure and use JetCache.

Through JetCache's caching mechanism, the system's performance and concurrency capabilities can be significantly improved, the access pressure to the database can be reduced, and the system's response speed can be improved. In actual projects, depending on specific needs and business scenarios, you can flexibly use various annotations provided by JetCache and select suitable cache adapters.

The above is the detailed tutorial on using JetCache cache in SpringBoot project. For more information about SpringBoot using JetCache cache, please follow my other related articles!