CONTENTS OF THIS FILE
---------------------

 * Introduction
 * Requirements
 * Installation
 * Configuration
 * Maintainers


INTRODUCTION
------------

The Ultimate Cron module runs cron jobs individually in parallel using
configurable rules, pool management and load balancing.

 * For a full description of the module, visit the project page:
   https://www.drupal.org/project/ultimate_cron

 * To submit bug reports and feature suggestions, or to track changes:
   https://www.drupal.org/project/issues/ultimate_cron


REQUIREMENTS
------------

This module requires no modules outside of Drupal core.


INSTALLATION
------------

 * Install the Ultimate Cron module as you would normally install a
   contributed Drupal module. Visit
   https://www.drupal.org/node/1897420 for further information.


CONFIGURATION
-------------

To add a cron job you can use either hook_cron() or use configuration files with
custom parameters for multiple/additional cron jobs in a module.

The easiest way to declare a cron job is to use hook_cron() and then configure
the cron job through the UI and export it, then change the cron jobs callback
method.

Another way to register a cron job is to add a cron configuration object in a
custom module. In your custom module add in the sub directory
my_module/config/optional a yaml file named
ultimate_cron.job.my_custom_cron_job_name.yml

For an example see the cron configuration of the simplenews module:
http://cgit.drupalcode.org/simplenews/tree/config/optional/ultimate_cron.job.simplenews_cron.yml

After installing the custom module the configuration will become available.
During development you can use the config_devel module to import configuration.

The cron configuration yaml file could look like:

```
langcode: en
status: true
dependencies:
  module:
    - user
title: 'Pings users'
id: user_ping
module: my_module
callback: _my_module_user_ping_cron
scheduler:
  id: simple
  configuration:
    rules:
      - '*/5@ * * * *'
launcher:
  id: serial
  configuration:
    timeouts:
      lock_timeout: 3600
      max_execution_time: 3600
    launcher:
      max_threads: 1
logger:
  id: database
  configuration:
    method: '3'
    expire: 1209600
    retain: 1000
```

The following details of the cron job can be specified:
 - "title": The title of the cron job. If not provided, the
   name of the cron job will be used.
 - "module": The module where this job lives.
 - "callback": The callback to call when running the job.
   Defaults to the job name.
 - "scheduler": Default scheduler (plugin type) for this job.
 - "launcher": Default launcher (plugin type) for this job.
 - "logger": Default logger (plugin type) for this job.


MAINTAINERS
-----------

 * Sascha Grossenbacher (Berdir) - https://www.drupal.org/u/berdir
 * Arne Jørgensen (arnested) - https://www.drupal.org/u/arnested
 * Thomas Gielfeldt (gielfeldt) - https://www.drupal.org/u/gielfeldt
 * Lukas Schneider (LKS90) - https://www.drupal.org/u/lks90

Supporting organizations:

 * MD Systems - https://www.drupal.org/md-systems
 * Reload! - https://www.drupal.org/reload

Thanks to Mark James for the icons:

 * http://www.famfamfam.com/lab/icons/silk/