discourse/lib/discourse_redis.rb

Ignoring revisions in .git-blame-ignore-revs. Click here to bypass and see the normal blame view.

163 lines
4.2 KiB
Ruby
Raw Normal View History

# frozen_string_literal: true
2013-02-05 14:16:51 -05:00
#
# A wrapper around redis that namespaces keys with the current site id
#
2013-02-05 14:16:51 -05:00
class DiscourseRedis
2013-03-25 02:19:59 -04:00
def self.raw_connection(config = nil)
config ||= self.config
Redis.new(config)
2013-03-25 02:19:59 -04:00
end
def self.config
GlobalSetting.redis_config
2013-03-25 02:19:59 -04:00
end
def initialize(config = nil, namespace: true)
@config = config || DiscourseRedis.config
@redis = DiscourseRedis.raw_connection(@config.dup)
@namespace = namespace
2013-02-05 14:16:51 -05:00
end
def without_namespace
# Only use this if you want to store and fetch data that's shared between sites
@redis
end
def self.ignore_readonly
yield
rescue Redis::CommandError => ex
if ex.message =~ /READONLY/
Discourse.received_redis_readonly!
nil
else
raise ex
end
end
2013-02-05 14:16:51 -05:00
# prefix the key with the namespace
def method_missing(meth, *args, **kwargs, &block)
2013-02-05 14:16:51 -05:00
if @redis.respond_to?(meth)
DiscourseRedis.ignore_readonly { @redis.public_send(meth, *args, **kwargs, &block) }
2013-02-05 14:16:51 -05:00
else
super
end
end
# Proxy key methods through, but prefix the keys with the namespace
[:append, :blpop, :brpop, :brpoplpush, :decr, :decrby, :expire, :expireat, :get, :getbit, :getrange, :getset,
2013-05-05 19:51:09 -04:00
:hdel, :hexists, :hget, :hgetall, :hincrby, :hincrbyfloat, :hkeys, :hlen, :hmget, :hmset, :hset, :hsetnx, :hvals, :incr,
:incrby, :incrbyfloat, :lindex, :linsert, :llen, :lpop, :lpush, :lpushx, :lrange, :lrem, :lset, :ltrim,
2015-09-28 02:38:52 -04:00
:mapped_hmset, :mapped_hmget, :mapped_mget, :mapped_mset, :mapped_msetnx, :move, :mset,
2013-05-05 19:51:09 -04:00
:msetnx, :persist, :pexpire, :pexpireat, :psetex, :pttl, :rename, :renamenx, :rpop, :rpoplpush, :rpush, :rpushx, :sadd, :scard,
:sdiff, :set, :setbit, :setex, :setnx, :setrange, :sinter, :sismember, :smembers, :sort, :spop, :srandmember, :srem, :strlen,
:sunion, :ttl, :type, :watch, :zadd, :zcard, :zcount, :zincrby, :zrange, :zrangebyscore, :zrank, :zrem, :zremrangebyrank,
:zremrangebyscore, :zrevrange, :zrevrangebyscore, :zrevrank, :zrangebyscore ].each do |m|
define_method m do |*args, **kwargs|
args[0] = "#{namespace}:#{args[0]}" if @namespace
DiscourseRedis.ignore_readonly { @redis.public_send(m, *args, **kwargs) }
end
2013-02-05 14:16:51 -05:00
end
2020-06-14 21:57:44 -04:00
def exists(*args)
args.map! { |a| "#{namespace}:#{a}" } if @namespace
DiscourseRedis.ignore_readonly { @redis.exists(*args) }
end
2020-06-14 21:57:44 -04:00
def exists?(*args)
args.map! { |a| "#{namespace}:#{a}" } if @namespace
DiscourseRedis.ignore_readonly { @redis.exists?(*args) }
end
2015-09-28 02:38:52 -04:00
def mget(*args)
args.map! { |a| "#{namespace}:#{a}" } if @namespace
2015-09-28 02:38:52 -04:00
DiscourseRedis.ignore_readonly { @redis.mget(*args) }
end
def del(k)
DiscourseRedis.ignore_readonly do
k = "#{namespace}:#{k}" if @namespace
@redis.del k
end
end
def scan_each(options = {}, &block)
DiscourseRedis.ignore_readonly do
match = options[:match].presence || '*'
options[:match] =
if @namespace
"#{namespace}:#{match}"
else
match
end
if block
2021-09-27 08:45:05 -04:00
@redis.scan_each(**options) do |key|
key = remove_namespace(key) if @namespace
block.call(key)
end
else
2021-09-27 08:45:05 -04:00
@redis.scan_each(**options).map do |key|
key = remove_namespace(key) if @namespace
key
end
end
end
end
def keys(pattern = nil)
DiscourseRedis.ignore_readonly do
pattern = pattern || '*'
pattern = "#{namespace}:#{pattern}" if @namespace
keys = @redis.keys(pattern)
if @namespace
len = namespace.length + 1
keys.map! { |k| k[len..-1] }
end
keys
end
end
def delete_prefixed(prefix)
DiscourseRedis.ignore_readonly do
keys("#{prefix}*").each { |k| Discourse.redis.del(k) }
end
end
def reconnect
@redis._client.reconnect
end
def namespace_key(key)
if @namespace
"#{namespace}:#{key}"
else
key
end
end
def namespace
RailsMultisite::ConnectionManagement.current_db
end
2013-02-05 14:16:51 -05:00
def self.namespace
Rails.logger.warn("DiscourseRedis.namespace is going to be deprecated, do not use it!")
2013-02-05 14:16:51 -05:00
RailsMultisite::ConnectionManagement.current_db
end
def self.new_redis_store
Cache.new
end
private
def remove_namespace(key)
key[(namespace.length + 1)..-1]
end
2013-02-05 14:16:51 -05:00
end