README

Install

To install via Composer, use the command below, it will automatically detect the latest version and bind it with ^.

composer require wyrihaximus/react-cron

Usage

Schedule actions within the ReactPHP Event Loop

use React\Promise\PromiseInterface;
use WyriHaximus\React\Cron;
use WyriHaximus\React\Cron\Action;

use function React\Promise\resolve;

Cron::create(
    new Action(
        'Hour', // Identifier used for mutex locking locking
        60, // TTL for the mutex lock, always set this way higher than the expected execution time, but low enough any failures during the run will cause issues
        '@hourly', // The cron expression used to schedule this action
        function (): PromiseInterface { // The callable ran when this action is due according to it's schedule
            echo 'Another hour has passed!', PHP_EOL;

            return resolve(true); // This callable MUST return a promise, which is used for releasing the mutex lock
        }
    ),
    new Action(
        'Minute',
        0.1,
        '* * * * *',
        function (): PromiseInterface {
            echo 'Another minute has passed!', PHP_EOL;

            return resolve(true);
        }
    )
);

// Stops scheduling new action runs
$cron->stop();

Factory methods

• Cron::create($loop, ...$actions): Cron with in-memory mutex.
• Cron::createWithMutex($loop, $mutex, ...$actions): Cron with supplied mutex.

Mutex

All mutexes must implement wyrihaximus/react-mutex to provide additional implementations beyond the default in memory one. This is meant to do distributed locking of cron jobs.

Error handling

With promise v3 uncaught rejected promises will no longer bubble up. As a result the running con instance will now emit errors when they occur and those must be handled.

$cron = Cron::create(...$actions);
$cron->on('error', static function (Throwable $throwable): void {
    // Handle error
});

License

The MIT License (MIT)

Copyright (c) 2023 Cees-Jan Kiewiet

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.