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Cronjobs for the internet!
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README.md

Momo

Cronjob to web hooks.

NPM

Build Status Dependency Status

About

Momo was designed to work as a worker (continuous process), and call it hooks when cron job should be executed.
Also Momo DOES NOT USE A DATABASE, it uses remote CSV file to fetch it hook cron list.

obs.: All dates are forced to be on GMT.

Requirements

Modules

Configuration

All Configuration need to be done through ENV IVARS.

Initialization config

  • CRONS_URL - End point to fetch cronjob list. REQUIRED
  • CRON_FETCH_LOOP - Time interval to Momo fetch CRONS_URL in milliseconds - REQUIRED normally it should be 3600000

Overall Config

  • NEW_RELIC_APP_NAME - New Relic application name. REQUIRED
  • NEW_RELIC_LICENSE_KEY - New Relic license key. REQUIRED

Installation

Start server

$ 'node server.js' OR 'foreman start'

CronJob Syntax

Momo CronJob syntax is very near to the Unix cron syntax, BUT it'll not allow ? character ,words and special keywords. (the last 2, are on roadmap.)


Style

*    *    *    *    *  url_to_be_called
┬    ┬    ┬    ┬    ┬
│    │    │    │    │
│    │    │    │    │
│    │    │    │    └───── day of week (0 - 6) (0 is Sunday)
│    │    │    └────────── month (1 - 12)
│    │    └─────────────── day of month (1 - 31)
│    └──────────────────── hour (0 - 23)
└───────────────────────── min (0 - 59)    

source Wikipedia - but modified


Special Keywords

Keyword Equivalent Description
@yearly OR @annually 0 0 1 1 * Run one time a year, on midnight, January 1.
@monthly 0 0 1 * * Run one time a month, on midnight, first day of month.
@weekly 0 0 * * 0 Run once a week, on midnight, on Sunday.
@daily 0 0 * * * Run once a day, on midnight.
@hourly 0 * * * * Run once a hour, on initial minute of it.

Syntax Rules

  • * - Means deactivated OR if not alone, means anything.
  • 1 (or any number) - Only this number will match.
  • 1,9 OR 1,2,3 - Any of these will match.
  • 1-3 - Range (same as 1,2,3).
  • 1,3-5 - Range and individual (same as 1,3,4,5).

All these commands can be combined with two stage command using the character /.


Samples

  • * * * * * http://example.com - Deactivated cronjob

  • @monthly http://example.com - Will run each month.

  • */* * * * * http://example.com - Will run each 1 minute.

  • * */* * * * http://example.com - Will run each 1 minute.

  • 2/* * * * * http://example.com - Will run every 2 minutes ,checking each minute.

  • 6/2 * * * * http://example.com - Will run every 12 minutes in one hour.

  • 6,2/2 * * * * http://example.com - Will run every 12 and 4 minutes.

  • 2-4/* * * * * http://example.com - Will run every 2,3,4 minutes. (Will not call two times if have an collision, as this sample)

  • */5 * * * * http://example.com - Will run on any minute divisible 5.

  • */7,9 * * * * http://example.com - Will run each on minutes 0,7,9,14,18 and any others divisible by 7 or 9 until 59, that is the minutes limit.

  • */7-9 * * * * http://example.com - Will run each on minutes 0,7,8,9 and any others divisible by 7,8, or 9 until 59, that is the minutes limit.

Contributing

  1. Fork it
  2. Create your feature branch (git checkout -b my-new-feature)
  3. Commit your changes (git commit -am 'Added some feature')
  4. Push to the branch (git push origin my-new-feature)
  5. Create new Pull Request

License

MIT

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