DelayedJob.md

Delayed Job

Source http://stackoverflow.com/questions/3638250/how-to-cancel-scheduled-job-with-delayed-job-in-rails

List jobs

Delayed::Job.all

Delete a job

job = Delayed::Job.find(params[:id])
job.delete

Custom job

class MyJob < Struct.new(:some_value);
    def perform
        # ...
    end
end

my_job = MyJob.new('xyz')
job = Delayed::Job.enqueue(my_job, {:priority => 0, :run_at => 1.hour.from_now})
job.name
# => "MyJob"
job.handler

Custom job name

class MyJob < Struct.new(:user_id);
    def perform
        # ...
    end

    def display_name
        return "MyJob-User-#{user_id}"
    end 
end

Init.d script

Create /etc/init.d/delayed_job Remember to change [app] to your app name and your deploy user

#! /bin/sh
set_path="cd /u/[app]/current"
deploy_user="deploy"

case "$1" in
    start)
    echo -n "Starting delayed_job: "
    su - $deploy_user -c "$set_path; RAILS_ENV=production script/delayed_job start" >> /var/log/delayed_job.log 2>&1
    echo "done."
    ;;
    stop)
    echo -n "Stopping delayed_job: "
    su - $deploy_user -c "$set_path; RAILS_ENV=production script/delayed_job stop" >> /var/log/delayed_job.log 2>&1
    echo "done."
    ;;
    *)
    echo "Usage: $N {start|stop}" >&2
    exit 1
    ;;
esac

exit 0

Then chmod it

sudo chmod +x /etc/init.d/delayed_job

Monit

From http://www.funonrails.com/2011/03/monitor-delayedjob-in-rails.html

Create delayed_job.monitrc under /etc/monit/conf.d (Be sure that /etc/monit/monitrc has include /etc/monit/conf.d at the bottom)

check process delayed_job with pidfile /u/[app]/shared/pids/delayed_job.pid
    stop program = "/etc/init.d/delayed_job stop"
    start program = "/etc/init.d/delayed_job start"
    if totalmem > 100.0 MB for 3 cycles then restart
    if cpu usage > 95% for 3 cycles then restart