Spring Boot IntroductionSpring Boot Code StructureSpring boot – beanSpring Boot Dependency Injection(IoC)Spring Boot EventsSpring Boot AOPSpring Boot Api AuthenticationSpring Boot JDBCSpring Boot HibernateSpring Boot Web MVCSpring Boot RestSpringboot – Rest File UploadSpring Boot Migration from SpringSpring Boot Security @Secured on method levelSpring Boot Security ConfigSpring Boot Thread PoolSpringboot MapstructSpringboot CacheSpring Boot TestingSpringboot JMSSpringboot EmailSpringboot with ThymeleafSpringboot with SwaggerSpring Boot – OAuth2Springboot LombokSpring Boot ElasticsearchCode SnippetsSpringBoot Interview QuestionsSpring Boot with Gradle
Springboot Cache
An application without cache is typically slow. Even great code will crawl when handling heavy traffic without cache. Caching can be a fast and relatively cheap way to increase performance.
Caching is a performance boost strategy you must implement into your application. Caching is nothing more than a hash table.
For Redis, all Redis data resides in-memory, in contrast to databases that store data on disk or SSDs. By eliminating the need to access disks, in-memory data stores such as Redis avoid seek time delays and can access data in microseconds. Redis features versatile data structures, high availability, geospatial, Lua scripting, transactions, on-disk persistence, and cluster support making it simpler to build real-time internet-scale apps.
I am going to show you how to implement caching into your Spring Boot application.
1. Include the following dependencies in your pom file.
<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-cache</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-redis</artifactId> </dependency>
In your application.properties file, set Redis configurations. Also set spring.cache.type=redis.
2. Create a configuration class
@Configuration
@EnableCaching
public class CachingConfig{
@Bean("customKeyGenerator")
public KeyGenerator keyGenerator() {
return new CustomKeyGenerator();
}
private class CustomKeyGenerator implements KeyGenerator {
public Object generate(Object target, Method method, Object... params) {
StringBuilder strParams = new StringBuilder(target.getClass().getSimpleName());
strParams.append("_");
strParams.append(method.getName());
for(Object param: params) {
strParams.append("_");
strParams.append(param);
}
System.out.println("key="+strParams.toString());
return strParams.toString();
}
}
}
3. Use @Cacheable to retrieve data
@Cacheable(value="users", key = "#id")
public User getById(Long id) {
// retrieve User from db
...
return user;
}
4. Use @CachePut to update cached data
@CachePut(value="users", key = "#user.id")
public User update(User user) {
....
return user;
}
5. Use @CacheEvict to delete cached data
@CacheEvict(value="users", key = "#id")
public Boolean delete(Long id) {
....
return true;
}
Spring Boot IntroductionSpring Boot Code StructureSpring boot – beanSpring Boot Dependency Injection(IoC)Spring Boot EventsSpring Boot AOPSpring Boot Api AuthenticationSpring Boot JDBCSpring Boot HibernateSpring Boot Web MVCSpring Boot RestSpringboot – Rest File UploadSpring Boot Migration from SpringSpring Boot Security @Secured on method levelSpring Boot Security ConfigSpring Boot Thread PoolSpringboot MapstructSpringboot CacheSpring Boot TestingSpringboot JMSSpringboot EmailSpringboot with ThymeleafSpringboot with SwaggerSpring Boot – OAuth2Springboot LombokSpring Boot ElasticsearchCode SnippetsSpringBoot Interview QuestionsSpring Boot with Gradle