Add getKeys function to org.springframework.cache.Cache [SPR-8878]

[spring-projects-issues]

y b opened SPR-8878 and commented

It would be nice to get access to all the keys of a specific cache from org.springframework.cache.Cache, in the same way possible for the Ehcache net.sf.ehcache.Cache version.

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Affects: 3.1 RC2

[spring-projects-issues]

Costin Leau commented

It's unlikely we'll ever introduce such a method because, while on a local cache everything is in memory and this call would not create issues, in a distributed environment it would be unreliable.
Consider a cache with 100k items - if you ask for the keys, most likely you'll end up with an OOM.

Use the native cache API - that gives you the feature you want right now, with minimal effort.