ya3s

package module
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Published: Aug 4, 2019 License: MIT Imports: 9 Imported by: 0

README

Ya3s - Yet another super simplistic scheduler

This is a work in progress to provide a simple way of scheduling stand alone functions to run at a specific point in time.

Example

import (
   "fmt"
   "github.com/oskar-r/ya3s"
)

func testFunc() error {
    //execute a task
    fmt.Printf("Task executed")
    return nil
}
func testFunc2() error {
    //execute a task
    fmt.Printf("Task executed")
    return nil
}

func main() {
    //Set up the task scheduler
    ya3s.Setup()
    //Add task to run every minute
    ya3s.AddTask(testFunc, "* * * *") 
    //Add task to run every tenth minute
    ya3s.AddTask(testFunc2, "0,10,20,30,40,50 * * *")
}

At this point in time you must your self secure that the task can execute within the timeframe for the task

Todo

  • Dependencies between tasks scheduled to run
  • REST interface to query the task scheduler for status and running tasks

Documentation

Overview

Package ya3s - Yet Another Super Simple Scheduler is a task schedule tkat executed tasks on assigned interval based on a cron syntax

At the begning of each minute assess if any task is up for execution, if so the task is executed and reports back execution statis to the task que. Tasks need to contain all logic needed to execute them and should only return an error

Copyright (C) 2019 by Oskar Roman <roman.oskar@gmail.com> Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: // The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

func AddTask

func AddTask(task Task, schedule string) (string, error)

AddTask add a new task to the que for execution once in the defined schedule (cron style * * * *)

func CleanUp

func CleanUp()

CleanUp is a function a function that sets the task queue to nil

func ListRegisteredTasks

func ListRegisteredTasks()

ListRegisteredTasks returns task and status for all currently registered tasks

func Setup

func Setup()

Setup a new execution que and start up the execution clock. Should be called before AddTask

Types

type Task

type Task func() error

Task is a function that executes when scheduled

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