The next step is to add the caching annotations, indicating when something needs to be added or removed from the cache. The following snippet shows an example:

    @Component
    public class ExampleRepository implements Repository {
      @Override
      @Cacheable("something-cache-key")
      public Something getSomething(String id) {
          //Other code
      }
    }

Some of the annotations that are supported are as follows:

• Cacheable: This is used to cache the result of a method invocation. The default implementation constructs the key based on the parameters passed to the method. The method will not be invoked if the value is found in the cache.
• CachePut: This is similar to @Cacheable. A significant difference is that the method is always invoked and the result is put in a cache.
• CacheEvict: This triggers an evict for a specific element from the cache. Typically done when an element is deleted or updated.

A few other important things to note about Spring caching are as follows:

• The default cache used is ConcurrentHashMap.
• The Spring caching abstraction is JSR-107 compliant.
• Other caches that can be auto configured include Ehcache, Redis, and Hazelcast.

Spring Boot Cache starter makes it easy to integrate caching into your application with simple easy-to-use annotations.