How to cache the list of entires based on its primary key using spring caching

Question

I want to cache the response of the repository class which has the following methods:

@Cacheable(cacheNames = "books", key="#id")
Book findById(Long Id);

@CacheEvict(cacheNames = "books", key = "#id")
void deleteById(Long id);

@Cacheable(cacheNames = "books", key="#book.id")
Book save(Book book);

@Cacheable("books")
List<Book> findAll();

Except the findAll() method, others are working as expected.

How to make findAll() to populate the books cache with book.id as key?

Answer 1

You need to provide a customized CacheManager and Cache implementation for your caching provider (e.g. Ehcache, Redis or Hazelcast).

By default, OOTB, Spring's Cache Abstraction does not split up cached method array/collection type return values into separate entries in the targeted cache. You must handle this yourself.

See my last response for this nearly identical question.