114 lines
3.1 KiB
Ruby
114 lines
3.1 KiB
Ruby
#
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# A wrapper around redis that namespaces keys with the current site id
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#
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require_dependency 'cache'
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class DiscourseRedis
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def self.raw_connection(config = nil)
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config ||= self.config
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Redis.new(config)
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end
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def self.config
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GlobalSetting.redis_config
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end
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def initialize(config=nil)
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@config = config || DiscourseRedis.config
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@redis = DiscourseRedis.raw_connection(@config)
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end
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def without_namespace
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# Only use this if you want to store and fetch data that's shared between sites
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@redis
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end
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def self.ignore_readonly
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yield
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rescue Redis::CommandError => ex
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if ex.message =~ /READONLY/
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unless Discourse.recently_readonly?
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STDERR.puts "WARN: Redis is in a readonly state. Performed a noop"
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end
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Discourse.received_readonly!
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else
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raise ex
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end
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end
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# prefix the key with the namespace
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def method_missing(meth, *args, &block)
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if @redis.respond_to?(meth)
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DiscourseRedis.ignore_readonly { @redis.send(meth, *args, &block) }
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else
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super
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end
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end
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# Proxy key methods through, but prefix the keys with the namespace
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[:append, :blpop, :brpop, :brpoplpush, :decr, :decrby, :exists, :expire, :expireat, :get, :getbit, :getrange, :getset,
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:hdel, :hexists, :hget, :hgetall, :hincrby, :hincrbyfloat, :hkeys, :hlen, :hmget, :hmset, :hset, :hsetnx, :hvals, :incr,
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:incrby, :incrbyfloat, :lindex, :linsert, :llen, :lpop, :lpush, :lpushx, :lrange, :lrem, :lset, :ltrim,
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:mapped_hmset, :mapped_hmget, :mapped_mget, :mapped_mset, :mapped_msetnx, :move, :mset,
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:msetnx, :persist, :pexpire, :pexpireat, :psetex, :pttl, :rename, :renamenx, :rpop, :rpoplpush, :rpush, :rpushx, :sadd, :scard,
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:sdiff, :set, :setbit, :setex, :setnx, :setrange, :sinter, :sismember, :smembers, :sort, :spop, :srandmember, :srem, :strlen,
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:sunion, :ttl, :type, :watch, :zadd, :zcard, :zcount, :zincrby, :zrange, :zrangebyscore, :zrank, :zrem, :zremrangebyrank,
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:zremrangebyscore, :zrevrange, :zrevrangebyscore, :zrevrank, :zrangebyscore].each do |m|
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define_method m do |*args|
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args[0] = "#{namespace}:#{args[0]}"
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DiscourseRedis.ignore_readonly { @redis.send(m, *args) }
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end
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end
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def mget(*args)
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args.map!{|a| "#{namespace}:#{a}"}
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DiscourseRedis.ignore_readonly { @redis.mget(*args) }
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end
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def del(k)
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DiscourseRedis.ignore_readonly do
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k = "#{namespace}:#{k}"
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@redis.del k
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end
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end
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def keys(pattern=nil)
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DiscourseRedis.ignore_readonly do
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len = namespace.length + 1
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@redis.keys("#{namespace}:#{pattern || '*'}").map{
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|k| k[len..-1]
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}
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end
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end
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def delete_prefixed(prefix)
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DiscourseRedis.ignore_readonly do
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keys("#{prefix}*").each { |k| $redis.del(k) }
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end
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end
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def flushdb
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DiscourseRedis.ignore_readonly do
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keys.each{|k| del(k)}
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end
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end
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def reconnect
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@redis.client.reconnect
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end
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def namespace
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RailsMultisite::ConnectionManagement.current_db
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end
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def self.namespace
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Rails.logger.warn("DiscourseRedis.namespace is going to be deprecated, do not use it!")
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RailsMultisite::ConnectionManagement.current_db
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end
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def self.new_redis_store
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Cache.new
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end
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end
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