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author | Nick Thomas <nick@gitlab.com> | 2019-08-29 20:17:30 +0300 |
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committer | Nick Thomas <nick@gitlab.com> | 2019-09-10 15:45:21 +0300 |
commit | 07323f44b74592e0991c5d3096e7fd0ca260fbab (patch) | |
tree | e9aae29c90354da8f3b9bb921fc2a2ac3860d741 /lib/gitlab/repository_set_cache.rb | |
parent | 6ce21a9c1712c4c64b628fd65207c2f8eb7fc39d (diff) |
Revert "Revert "Cache branch and tag names as Redis sets""
This reverts commit c6ccc07f48c7c1f9da43ecd82015500a4340544d.
Diffstat (limited to 'lib/gitlab/repository_set_cache.rb')
-rw-r--r-- | lib/gitlab/repository_set_cache.rb | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/lib/gitlab/repository_set_cache.rb b/lib/gitlab/repository_set_cache.rb new file mode 100644 index 00000000000..fb634328a95 --- /dev/null +++ b/lib/gitlab/repository_set_cache.rb @@ -0,0 +1,67 @@ +# frozen_string_literal: true + +# Interface to the Redis-backed cache store for keys that use a Redis set +module Gitlab + class RepositorySetCache + attr_reader :repository, :namespace, :expires_in + + def initialize(repository, extra_namespace: nil, expires_in: 2.weeks) + @repository = repository + @namespace = "#{repository.full_path}:#{repository.project.id}" + @namespace = "#{@namespace}:#{extra_namespace}" if extra_namespace + @expires_in = expires_in + end + + def cache_key(type) + [type, namespace, 'set'].join(':') + end + + def expire(key) + with { |redis| redis.del(cache_key(key)) } + end + + def exist?(key) + with { |redis| redis.exists(cache_key(key)) } + end + + def read(key) + with { |redis| redis.smembers(cache_key(key)) } + end + + def write(key, value) + full_key = cache_key(key) + + with do |redis| + redis.multi do + redis.del(full_key) + + # Splitting into groups of 1000 prevents us from creating a too-long + # Redis command + value.in_groups_of(1000, false) { |subset| redis.sadd(full_key, subset) } + + redis.expire(full_key, expires_in) + end + end + + value + end + + def fetch(key, &block) + if exist?(key) + read(key) + else + write(key, yield) + end + end + + def include?(key, value) + with { |redis| redis.sismember(cache_key(key), value) } + end + + private + + def with(&blk) + Gitlab::Redis::Cache.with(&blk) # rubocop:disable CodeReuse/ActiveRecord + end + end +end |