Cache, allow custom wrapper types other than java.util.Optional [SPR-16530]

[spring-projects-issues]

Ken Schosinsky opened SPR-16530 and commented

Currently the caching annotations can only work with java.util.Optional. There's no support for other wrapper types (e.g. Vavr's Option/Try/Either/Lazy etc.).

I would like to be able to register custom return value unwrappers or something equivalent to the key property for the return value:

// Example with Vavr's Either
@CachePut(cacheNames = "myCache", condition = "#result.isRight()", result = "#result.getRight()")
Either<String, CacheData> myMethod(int id);

Greetings,
Ken

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Issue Links:

• Allow transaction control via Vavr Try type [SPR-15806] #20361 Allow transaction control via well-known method return types
• Incorrect return type of Kotlin suspending functions [SPR-16515] #21058 Incorrect return type of Kotlin suspending functions