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# frozen_string_literal: true
module Gitlab
module Cache
# It replaces Rails.cache with metrics support
class Client
DEFAULT_BACKING_RESOURCE = :unknown
DEFAULT_FEATURE_CATEGORY = :not_owned
def initialize(metrics, backend: Rails.cache)
@metrics = metrics
@backend = backend
end
def read(name, options = nil, labels = {})
read_result = backend.read(name, options)
if read_result.nil?
metrics.increment_cache_miss(labels)
else
metrics.increment_cache_hit(labels)
end
read_result
end
def fetch(name, options = nil, labels = {}, &block)
read_result = read(name, options, labels)
return read_result unless block || read_result
backend.fetch(name, options) do
metrics.observe_cache_generation(labels, &block)
end
end
delegate :write, :exist?, :delete, to: :backend
private
attr_reader :metrics, :backend
end
end
end
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