gitlab-org--gitlab-foss/lib/gitlab/diff/stats_cache.rb

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# frozen_string_literal: true
#
module Gitlab
module Diff
class StatsCache
include Gitlab::Utils::StrongMemoize
EXPIRATION = 1.week
# The DiffStats#as_json representation is tied to the Gitaly protobuf version
VERSION = Gem.loaded_specs['gitaly'].version.to_s
def initialize(cachable_key:)
@cachable_key = cachable_key
end
def read
strong_memoize(:cached_values) do
content = cache.fetch(key)
next unless content
stats = content.map { |stat| Gitaly::DiffStats.new(stat) }
Gitlab::Git::DiffStatsCollection.new(stats)
end
end
def write_if_empty(stats)
return if cache.exist?(key)
return unless stats
cache.write(key, stats.map(&:to_h).as_json, expires_in: EXPIRATION)
clear_memoization(:cached_values)
end
def clear
cache.delete(key)
end
private
attr_reader :cachable_key
def cache
Rails.cache
end
def key
strong_memoize(:redis_key) do
['diff_stats', cachable_key, VERSION].join(":")
end
end
end
end
end