如何停用Sidekiq Uniqueness

背景是这样的：

你有一些Sidekiq的job,并且设置了unique_for，然后系统崩溃了，在你的redis里仍然有这个唯一性的锁，但是job却不见了，导致后面的job也进不来，这个时候需要手动disable这个唯一锁。

官网传送：Ent Unique Jobs · mperham/sidekiq Wiki · GitHub

1.先看看unique_for是怎么设置的:

class MyJob
  include Sidekiq::Job
  sidekiq_options unique_for: 10.minutes

  def perform(...)
  end
end

官网解释：

This means that a second job can be pushed to Redis after 10 minutes or after the first job has successfully processed. If your job retries for a while, 10 minutes can pass, thus allowing another copy of the same job to be pushed to Redis. Design your jobs so that uniqueness is considered best effort, not a 100% guarantee A time limit is mandatory so that if a process crashes, any locks it is holding won't last forever.

简单理解就是你设置了10分钟，然后10分钟内只有一个这个job可以跑，不能同时跑两个。

2.关于如何绕过或者停用这个设置，官网是这样说的
If you declare unique_for in the Worker's class-level sidekiq_options but want to push a one-off job that bypasses the uniqueness check, use set to dynamically override the unique_for option:

# disable uniqueness
MyWorker.set(unique_for: false).perform_async(1,2,3)
# set a custom unique time
MyWorker.set(unique_for: 300).perform_async(1,2,3)

3.看看实际案例

正常运行的情况下，可以看到某一时间段内只有一个job

手动停用的情况下，可以看到每次都有一个新的job

 好啦，学会了。