安装gem包
$ gem install whenever
或者在Gemfile中添加
gem 'whenever',:require=>false
进入项目根目录,生成schedule.rb文件
$ wheneverize .
显示添加的schedule.rb任务
$ whenever #不会读取或修改crontab文件
添加任务
$ whenever --update-crontab
列举所有添加的cron任务
$ crontab -l
schedule.rb任务举例
every 3.hours do
runner "MyModel.some_process"
rake "my:rake:task"
command "/usr/bin/my_great_command"
end
every 1.day, :at => '4:30 am' do
runner "MyModel.task_to_run_at_four_thirty_in_the_morning"
end
every :hour do # Many shortcuts available: :hour, :day, :month, :year, :reboot
runner "SomeModel.ladeeda"
end
every :sunday, :at => '12pm' do # Use any day of the week or :weekend, :weekday
runner "Task.do_something_great"
end
every '0 0 27-31 * *' do
command "echo 'you can use raw cron syntax too'"
end
# run this task only on servers with the :app role in Capistrano
# see Capistrano roles section below
every :day, :at => '12:20am', :roles => [:app] do
rake "app_server:task"
end
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