Spring cacheable annotation with multiple key

Question

I have 2 ways to lookup a customer record (code below), customerGuid and customerId are 2 different fields in Customer object.

Suppose that i lookup customer by customerId once, is there a way for me to lookup customer by guid directly from cache without querying backend, Assuming both the methods return type is Customer.

public class CustomerLookup { @Cacheable("customerCache") public Customer getCustomerByGuid(final String customerGuid) { // some implementation here... } @Cacheable("customerCache") public Customer getCustomerByCustId(final String customerId) { // some implementation here... } }

akuma8 · Accepted Answer · 2018-09-17 19:57:56Z

You can add a 2nd parameter to one method which will only serve as cache key. Example use customerId as key and proceed like this:

@Service public class CustomerLookup { @Autowired @Lazy private CustomerLookup self; @CachePut("customerCache", key="#customerId") public Customer getCustomerByGuid(final String customerGuid, String customerId) { Customer customer = self.getCustomerByCustId(final String customerId); //...... } }

Note the self-injection of CustomerLookup if you don't do that the cache won't work when you call the getCustomerByCustId(final String customerId) method in getCustomerByGuid. Also note the @CachePut instead of @Cacheable on getCustomerByGuid, with this you are sure that this method will be called everytime.

Thanks for your answer, however in mycase the caller of getCustomerByGuid() mayn't always know or have customerId. Thats one of the reason why there are 2 lookup methods.

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