Spring boot cache results

Question

I have several read-only resources in my Controller. I want to in-memory cache them, I'm not clear how to do it in Spring Boot. What I've done:

annotated main Application with @EnableCaching
annotated a resource with @Cacheable

@Cacheable
@RequestMapping(value = "/api/graph", method=RequestMethod.GET, produces = { "application/json"})
public @ResponseBody Iterable<Map<String, String>> graph() {
    return Repository.graph();
}

What am I missing? Since it's a read-only resource I guess I don't neet @CachePut am I right?

Obiouvsly I added spring-boot-starter-cache ad dependency in maven

Have a look here: https://stackoverflow.com/questions/24164014/how-to-enable-http-response-caching-in-spring-boot#24179151 — Mateusz Chrzaszcz, Jul 26 '17 at 12:05

score 0 · Answer 1 · answered Jun 22 '19 at 20:19

Here are the steps to enable the Cache. For example i am using Google GuavaCacheManager for this purpose.

Add dependency and Enable the caching by using annotation on Application class.

<dependency>
<groupId>com.google.guava</groupId>
<artifactId>guava</artifactId>
<version>18.0</version>
</dependency>

@SpringBootApplication
@EnableCaching
public class Application extends SpringBootServletInitializer {
}

Expose the GuavaCacheManager as a bean in your Application class.

@Bean
public CacheManager cacheManager() {
GuavaCacheManager cacheManager = new GuavaCacheManager();
// Cache expires every day
cacheManager.setCacheBuilder(CacheBuilder.newBuilder().expireAfterAccess(1, 
TimeUnit.DAYS).expireAfterWrite(1, TimeUnit.DAYS)); 
cacheManager.setCacheNames(Arrays.asList("findUser"));
return cacheManager;
}

Mark the method as Cacheable so all the calls to this method first try to find the entry in Cache if not found then actually calls the method

@Override
@Cacheable("findUser")
public User findUser(String username) {
// biz logic to find the user and return the object
return user;
}

Spring boot cache results

1 Answers1