feat: add CachedValue#refresher #31
Merged
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This adds a function, similar to fallback values, which allows a value to be recalculated and set in Redis via
#refresh(). The more powerful feature is that this value is automatically set in Redis when the current value is null (it has expired) and a call to#get()is made, returning the new refreshed value.Thus allowing
CachedValuesto support proper cache invalidation, via@ExpireAfter(...)and proper repopulation/on-demand recalculation via a.refresher(...)Supersedes #30