A Resque plugin. Requires Resque 1.7.0.
If you want only one instance of your job running at a time, extend it with this module.
require 'resque/plugins/lock' class UpdateNetworkGraph extend Resque::Plugins::Lock def self.perform(repo_id) heavy_lifting end end
While other UpdateNetworkGraph jobs will be placed on the queue, the Locked class will check Redis to see if any others are executing with the same arguments before beginning. If another is executing the job will be aborted.
If you want to define the key yourself you can override the
lock class method in your subclass, e.g.
class UpdateNetworkGraph extend Resque::Plugins::Lock Run only one at a time, regardless of repo_id. def self.lock(repo_id) "network-graph" end def self.perform(repo_id) heavy_lifting end end
The above modification will ensure only one job of class UpdateNetworkGraph is running at a time, regardless of the repo_id. Normally a job is locked using a combination of its class name and arguments.