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# frozen_string_literal: true
module Gitlab
class ProcessMemoryCache
module Helper
def fetch_memory_cache(key, &payload)
cache = cache_backend.read(key)
if cache && !stale_cache?(key, cache)
cache[:data]
else
store_cache(key, &payload)
end
end
def invalidate_memory_cache(key)
touch_cache_timestamp(key)
end
private
def touch_cache_timestamp(key, time = Time.current.to_f)
shared_backend.write(key, time)
end
def stale_cache?(key, cache_info)
shared_timestamp = shared_backend.read(key)
return true unless shared_timestamp
shared_timestamp.to_f > cache_info[:cached_at].to_f
end
def store_cache(key)
data = yield
time = Time.current.to_f
cache_backend.write(key, data: data, cached_at: time)
touch_cache_timestamp(key, time) unless shared_backend.read(key)
data
end
def shared_backend
Rails.cache
end
def cache_backend
::Gitlab::ProcessMemoryCache.cache_backend
end
end
end
end
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