The main changes are:
- Updating the pipeline to allow for doing a background refresh of the
cache
- Remove the use of the EventAwareCacheWrapper for the posts public
cache
### Background refresh
This is just an initial implementation, and tbh it doesn't sit right
with me that the logic for this is in the pipeline - I think this should
sit in the cache implementation itself, and then we call out to it with
something like: `cache.get(key, fetchData)` and then the updates can
happen internally.
The `cache-manager` project actually has a method like this called
`wrap` - but every time I've used it it hangs, and debugging was a pain,
so I don't really trust it.
### EventAwareCacheWrapper
This is such a small amount of logic, I don't think it's worth creating
an entire wrapper for it, at least not a class based one. I would be
happy to refactor this to use a `Proxy` too, so that we don't have to
add methods to it each time we wanna change the underlying cache
implementation.
refs https://github.com/TryGhost/Arch/issues/5
- Current event-aware cache wrapper has been using a timestamp as a way to create keys in Redis cache and reset them all at once. We are now moving on to the updated Redis adapter that supports "reset()" natively, so there's no need for synthetic resets.
As discussed with the product team we want to enforce kebab-case file names for
all files, with the exception of files which export a single class, in which
case they should be PascalCase and reflect the class which they export.
This will help find classes faster, and should push better naming for them too.
Some files and packages have been excluded from this linting, specifically when
a library or framework depends on the naming of a file for the functionality
e.g. Ember, knex-migrator, adapter-manager
refs https://github.com/TryGhost/Toolbox/issues/522
- The main feature of this cache wrapper is being able to "reset" the the cache without calling the "reset" on the wrapped cache. Being able to invalidate caches without accessing the data is a feature needed to run on caches with shared environment.
- Cache invalidation happens through a special "reset time" key being added to each key when setting or getting a value, when the cache is reset the reset time is set to a new value - essentially invalidating all previously accessible values.
