请问下各位大佬，目前有基于数据库实现分布式锁的 gem 吗 看了下只找到了一个 redlock，基于 redis 实现的 但是项目中的版本比较旧，使用 redlock 的话需要升级 ruby 和 rails 版本，怕影响太大
require 'active_record'
require 'mutex_m'
class ScheduleLock
def initialize
@locked = false
@mutex = Mutex.new
end
def lock(name)
@mutex.synchronize do
ActiveRecord::Base.transaction do
lock = ActiveLock.find_or_create_by!(name: name)
host_name = `hostname`.strip
if lock.locked?
Rails.logger.error "Lock #{name} is already locked by #{lock.host}"
return
else
lock.update!(locked: true, host: host_name)
@locked = true
end
end
end
end
def unlock(name)
@mutex.synchronize do
ActiveRecord::Base.transaction do
lock = ActiveLock.find_or_create_by!(name: name)
if lock.locked?
lock.update!(locked: false)
@locked = false
end
end
end
end
def with_lock(name)
lock(name)
return unless @locked
begin
yield
ensure
unlock(name)
end
end
end
可以自己写一个，我在自己项目里面就这样简单的基于 activerecord 做一个
