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Contents
# typed: true
require_relative 'patcher'
module Datadog
module Tracing
module Contrib
module ActiveSupport
module Cache
# Support for Redis with ActiveSupport
module Redis
# Patching behavior for Redis with ActiveSupport
module Patcher
# For Rails < 5.2 w/ redis-activesupport...
# When Redis is used, we can't only patch Cache::Store as it is
# Cache::RedisStore, a sub-class of it that is used, in practice.
# We need to do a per-method monkey patching as some of them might
# be redefined, and some of them not. The latest version of redis-activesupport
# redefines write but leaves untouched read and delete:
# https://github.com/redis-store/redis-activesupport/blob/v4.1.5/lib/active_support/cache/redis_store.rb
#
# For Rails >= 5.2 w/o redis-activesupport...
# ActiveSupport includes a Redis cache store internally, and does not require these overrides.
# https://github.com/rails/rails/blob/master/activesupport/lib/active_support/cache/redis_cache_store.rb
def patch_redis?(meth)
!Gem.loaded_specs['redis-activesupport'].nil? \
&& defined?(::ActiveSupport::Cache::RedisStore) \
&& ::ActiveSupport::Cache::RedisStore.instance_methods(false).include?(meth)
end
def cache_store_class(meth)
if patch_redis?(meth)
::ActiveSupport::Cache::RedisStore
else
super
end
end
end
# Decorate Cache patcher with Redis support
Cache::Patcher.singleton_class.prepend(Redis::Patcher)
end
end
end
end
end
end
Version data entries
12 entries across 12 versions & 1 rubygems