@Cacheable when keyBuilder return null, then throw error to main thread

[wangsp188]

spring-projects/spring-data-redis#3089 (comment)
Can we not handle the cache when return is null not throw error to main thread?

[quaff]

You can return Optional.empty() instead of null if #34258 is accepted.

[wangsp188]

@quaff Thanks

why not is support return null?
By the way, please.

[quaff]

why not is support return null? By the way, please.

It's bad to change the method contract.

[snicoll]

spring-projects/spring-data-redis#3089 (comment):

But we can't predict whether the method's entry is reasonable or not. ,

You should. The cache key must be predictable and provide a proper contract. If you decide to provide your own algorithm you are responsible for it to be a valid key for whatever you intend to cache.