A Resque plugin. Requires Resque 1.7.0.
If you want only one instance of your job queued at a time, extend it with this module.
For example:
require 'resque/plugins/lock'
class UpdateNetworkGraph
extend Resque::Plugins::Lock
def self.perform(repo_id)
heavy_lifting
end
end
While this job is queued or running, no other UpdateNetworkGraph jobs with the same arguments will be placed on the queue.
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 queued at a time, regardless of the repo_id. Normally a job is locked using a combination of its class name and arguments.