High performance/availability cache setup - feature request about cache-manager

[BryanDonovan]

Are you saying you need methods like cacheStore.getTtl()?

[PuKoren]

Something like that, for a given key. It will be needed for this feature

I can add it to memory cache, as well as redis cache, but for other caches it may cause the feature to not work because this method wont be available. Any idea for this?

[BryanDonovan]

I suppose this could just be added like it is in caching.js:

    /**
     * Binds to the underlying store's `ttl` function if it exists.
     * @function
     * @name ttl
     */
    if (typeof self.store.ttl === 'function') {
        self.ttl = self.store.ttl.bind(self.store);
    }

Your new feature should probably check if the ttl function exists before trying to use it.. or maybe throw an error so it fails hard.

[PuKoren]

Thanks for your answer, I will assume that .ttl function is required for this feature then. I would like to keep backward compatibility so I don't think I will throw any error, but rather disabling the feature if ttl function is undefined on one of the stores.

[BryanDonovan]

I think this sounds good. This should probably be something a user enables via config. Something like autoUpdateLowerPriorityCaches: true (hopefully you can think of a better name though).

[PuKoren]

Ok, will go for a config var then, thanks for your inputs!

[amit777]

@PuKoren I was looking to do something almost exactly the same (in fact your solution sounds better than what I was thinking). Did you end up creating something for this?