https://github.com/codezeilen/scheduler
A Squeak/Smalltalk task scheduler
https://github.com/codezeilen/scheduler
Last synced: 4 months ago
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A Squeak/Smalltalk task scheduler
- Host: GitHub
- URL: https://github.com/codezeilen/scheduler
- Owner: codeZeilen
- License: mit
- Created: 2018-10-05T13:39:05.000Z (over 6 years ago)
- Default Branch: master
- Last Pushed: 2020-03-06T14:26:14.000Z (over 5 years ago)
- Last Synced: 2025-01-14T12:15:55.830Z (5 months ago)
- Language: Smalltalk
- Size: 26.4 KB
- Stars: 2
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
# Scheduler [](https://travis-ci.org/codeZeilen/Scheduler) [](https://coveralls.io/github/codeZeilen/Scheduler?branch=master)
A Squeak/Smalltalk task scheduler similar to cron.
This is a fork from the original Scheduler package provided by John Pierce. The original project remains largely unchanged except for some adjustments to match the present-day Squeak standard library. The license is MIT as with the original source code.
## How to install
1. Get [Squeak 4.6 or later](http://www.squeak.org)
2. Load [Metacello](https://github.com/metacello/metacello)
3. Finally, load Scheduler with the following command:
```Smalltalk
Metacello new
baseline: 'Scheduler';
repository: 'github://codezeilen/scheduler/packages';
load.
```
## Usage
Note: The following is based on the original SqueakMap description
An easy-to-use task scheduler that can run arbitrary blocks:
* Every so often (e.g. every hour starting now)
* Daily at a given time
* Periodically starting at a given time (e.g. every other hour starting a noon)
* Per a provide schedule (e.g. using Schedule instance you can run tasks every Monday and Friday)
* A one time task at some point in the future
For ease of use tasks can be blocks passed to the scheduler (or any object that understands #value). For example:
```Smalltalk
"Start a new task scheduler and keep it around"
scheduler := TaskScheduler new.
scheduler start.
"Let's save the image every hour"
scheduler
do: [Smalltalk snapshot: true andQuit: false]
every: 60 minutes.
"Let's run a backup at 2am every day"
scheduler
do: ["backup code here"]
at: '2am'
"Let's perform a bank transfer every other hour starting at 1pm"
scheduler
do: ["swiss bank account transfer code"]
at: '1pm'
every: 2 hours.
"Let's do a one time email reminder"
scheduler
doOnce: ["email reminder to go on honeymoon"]
at: '2005-1-15T8:00'
"You can delete tasks by sending #delete to them"
(scheduler taskAt: 1) delete
"Stop the scheduler from running -- but don't delete its tasks"
scheduler stop.```
Read the provided tests for more examples.