sisyphus

"... one must imagine sisyphus happy" - Albert Camus

Sisyphus was the O.G Scheduler, he doggedly rolled a rock up the mountain (only to have it roll back down) and he repeated that, everyday. He wasn't with limitations, he could do only one task. That was until he discovered clojure, drunk on the power of clojure, sisyphus can schedule multiple tasks and will do them happily for you, since anything is more fun than rolling a rock up the mountain, that's how one ~~must imagine~~ knows sisyphus is happy.

Usage

There are three functions that you will use the most.

• add-task!
• run-tasks!
• stop-tasks!

add-task!

Tasks are 0-arity clojure functions. i.e. they should take no arguments.

add-task's args [task schedule] [name task schedule]

schedule is a vector containing the gap at which tasks will be scheduled.

(ns user.core 
  (:require [sisyphus.core :as sisy]))

(defn my-task1 [] 
  (println "this is a task"))

(add-task! "task1" my-task1 [:every 1 :day 5 :hours 3 :minutes 1 :second 
                             :starting-at 10 30])
=> Task task1 added successfully
; -----------snip--------------

;; optionally you can omit the task name, and the name of the function will be used.
(add-task! my-task1 [:every 1 :hour])
=> Task user.core/my-task1 added successfully
;-----------------snip-----------------------

Note: you can dynamically add tasks while sisyphus is running.

schedule vector

The first element to the vector is :every followed by an integer and a keyword denoting a time duration like :minute. This is the bare minimum. The valid durations that can be passed are

:days :day
:hours :hour
:minutes :minute
:seconds :second

Optionally you can specify a time that you want the task to run for the first time, using :starting-at like [:starting-at 10 30] a 24 hour format is used.

run-tasks!

This will start sisyphus and run the tasks in another thread, so you can keep doing your work. So you can dynamically add or remove tasks

stop-tasks!

This will gracefulyl stop sisyphus. All tasks currently running will finish running.

logging

Logs can be printed or written to a sisyphus-log.edn file. (print-log!) will print to console for e.g

(print-log!)
SUCCESS writefileSleep 2021-10-24T21:09:48 2021-10-24T21:09:59  
SUCCESS writefile2seconds 2021-10-24T21:09:48 2021-10-24T21:09:48  
SUCCESS writefile2seconds 2021-10-24T21:09:54 2021-10-24T21:09:54  

(write-log!) will write to the edn file.

License

Copyright © 2021 Abhinav Omprakash

This program and the accompanying materials are made available under the terms of the Eclipse Public License 2.0 which is available at http://www.eclipse.org/legal/epl-2.0.

This Source Code may also be made available under the following Secondary Licenses when the conditions for such availability set forth in the Eclipse Public License, v. 2.0 are satisfied: GNU General Public License as published by the Free Software Foundation, either version 2 of the License, or (at your option) any later version, with the GNU Classpath Exception which is available at https://www.gnu.org/software/classpath/license.html.