Spring Cache configuration to variable int as key in @Cacheable annotation

Question

How can I configure Spring cache to accept an int variable as a key?

I tried the following but has not worked. I did read in the API, and I saw that the value for the key must be string. So I'm not 100% sure what is the properly configuration

I tried use this annotation in my method:

@Cacheable(cacheNames="GETREQUIREMENTPRIVATE", key = "#RequirementID")
private Requirement getRequirement(final int RequirementID, final Connection connection)

And I did set this in my ehcache.xml file:

<cache name="GETREQUIREMENTPRIVATE"
statistics="true"
         maxElementsInMemory="1000"
         eternal="true"
         memoryStoreEvictionPolicy="LFU">
</cache>

Answer 1

You can use Integer for the key, but not primitive int there should is Object because for getting String key will use.toString() method. So Integer , not int .