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Last Updated: February 25, 2016
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1.664K
· endel

Khronos - Simple HTTP-based Job scheduling for the cloud

Repository: https://github.com/endel/khronos

Features

  • Schedule of HTTP Requests
  • Configure recurrency per request
  • Log HTTP status code for every request made
  • Query the database via REST API
  • Postgresql, MySQL and SQLite supported. (mongodb will be supported soon)

How it works

Khronos use a rack app to schedule and query for scheduled tasks, and a worker
process to execute them in the background.

At 'examples' directory you find two rackup files for these processes.

How to use

Create a scheduled task:

RestClient.post('http://localhost:3000/task', {
  :context => 'test',
  :at => 24.hours.from_now,
  :task_url => "http://myapp.com/do-something-awesome",
  :recurrency => 12.hours
})
# => "{\"active\":true,\"at\":\"2012-09-15T21:24:56-03:00\",\"context\":\"test\",\"id\":1,\"recurrency\":1,\"task_url\":\"http://myapp.com/do-something-awesome\"}"

Query for a scheduled task:

RestClient.get('http://localhost:3000/task', :params => { :context => 'test' })
# => "{\"active\":true,\"at\":\"2012-09-15T21:24:56-03:00\",\"context\":\"test\",\"id\":1,\"recurrency\":1,\"task_url\":\"http://myapp.com/do-something-awesome\"}"

Delete a scheduled task by query:

RestClient.delete('http://localhost:3000/task', :params => { :status_code => 404 })
# => "{\"deleted\":3}"
RestClient.delete('http://localhost:3000/task', :params => { :id => 9 })
# => "{\"deleted\":1}"

Query for logs for tasks that already ran.

RestClient.get('http://localhost:3000/schedule/logs', :params => { :status_code => 500 })
# => "[{\"id\":3,\"schedule_id\":1,\"started_at\":\"2012-09-15T13:38:48-03:00\",\"status_code\":500},{\"id\":5,\"schedule_id\":2,\"started_at\":\"2012-09-15T13:38:48-03:00\",\"status_code\":500}]"

Note: these examples are using rest-client and activesupport.