rikudou/cron-bundle

Simple and effective cron implementation for Symfony 4

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Type:symfony-bundle

v0.1.1 2018-11-06 14:59 UTC

README

Via composer: composer require rikudou/cron-bundle.

The bundle should be enabled automatically if you use the Symfony Flex.

How to use

Every cron job must implement the Rikudou\CronBundle\Cron\CronJobInterface (every class that implements the interface is automatically registered as cron job), which defines two methods:

  • string getCronExpression() - the cron expression
  • execute(InputInterface $input, OutputInterface $output, LoggerInterface $logger) - the method that will be executed, you can write to console output, use console input and use logger

Example:

<?php

namespace App\CronJobs;

use Psr\Log\LoggerInterface;
use Rikudou\CronBundle\Cron\CronJobInterface;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Output\OutputInterface;

class MyTestCronJob implements CronJobInterface
{

    /**
     * The cron expression for triggering this cron job
     * @return string
     */
    public function getCronExpression(): string
    {
        return "*/5 * * * *";
    }

    /**
     * This method will be executed when cron job runs
     *
     * @param InputInterface $input
     * @param OutputInterface $output
     * @param LoggerInterface $logger
     * @return mixed
     */
    public function execute(InputInterface $input, OutputInterface $output, LoggerInterface $logger)
    {
        $logger->debug("The cron job was executed!");
    }
}

The cron jobs are executed using the console command cron:run, this command should be executed every minute.

Example for crontab:

* * * * * php /path/to/project/bin/console cron:run

Listing cron jobs

If you want to see list of all jobs, run cron:list command from Symfony console.

Example: php bin/console cron:list

Example output:

+----------------------------+---------+-----------------+--------+---------------------+
| Class                      | Enabled | Cron expression | Is due | Next run            |
+----------------------------+---------+-----------------+--------+---------------------+
| App\CronJobs\MyTestCronJob | yes     | */5 * * * *     | no     | 2018-08-07 18:30:00 |
+----------------------------+---------+-----------------+--------+---------------------+

The listing will also let you know if the cron expression is invalid:

+----------------------------+---------+-----------------+----------------------------+----------------------------+
| Class                      | Enabled | Cron expression | Is due                     | Next run                   |
+----------------------------+---------+-----------------+----------------------------+----------------------------+
| App\CronJobs\MyTestCronJob | yes     | */5 * * * * *   | Cron expression is invalid | Cron expression is invalid |
+----------------------------+---------+-----------------+----------------------------+----------------------------+

Disabling a cron job

If you have a cron job that you don't want to delete but at the same time you don't want to trigger it, you can define method isEnabled() and let it return false.

You can also use the packaged helper trait Rikudou\CronBundle\Helper\DisabledCronJob.

Example 1 (wihout trait):

<?php

namespace App\CronJobs;

use Psr\Log\LoggerInterface;
use Rikudou\CronBundle\Cron\CronJobInterface;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Output\OutputInterface;

class MyTestCronJob implements CronJobInterface
{

    /**
     * The cron expression for triggering this cron job
     * @return string
     */
    public function getCronExpression(): string
    {
        return "*/5 * * * *";
    }

    /**
     * This method will be executed when cron job runs
     *
     * @param InputInterface $input
     * @param OutputInterface $output
     * @param LoggerInterface $logger
     * @return mixed
     */
    public function execute(InputInterface $input, OutputInterface $output, LoggerInterface $logger)
    {
        $logger->debug("The cron job was executed!");
    }

    public function isEnabled() {
        return false;
    }
}

Example 2 (using trait):

<?php

namespace App\CronJobs;

use Psr\Log\LoggerInterface;
use Rikudou\CronBundle\Cron\CronJobInterface;
use Rikudou\CronBundle\Helper\DisabledCronJob;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Output\OutputInterface;

class MyTestCronJob implements CronJobInterface
{

    use DisabledCronJob;

    /**
     * The cron expression for triggering this cron job
     * @return string
     */
    public function getCronExpression(): string
    {
        return "*/5 * * * *";
    }

    /**
     * This method will be executed when cron job runs
     *
     * @param InputInterface $input
     * @param OutputInterface $output
     * @param LoggerInterface $logger
     * @return mixed
     */
    public function execute(InputInterface $input, OutputInterface $output, LoggerInterface $logger)
    {
        $logger->debug("The cron job was executed!");
    }

}

In both cases the output will be similar to:

+----------------------------+---------+-----------------+--------+---------------------+
| Class                      | Enabled | Cron expression | Is due | Next run            |
+----------------------------+---------+-----------------+--------+---------------------+
| App\CronJobs\MyTestCronJob | no      | */5 * * * *     | no     | 2018-08-07 18:40:00 |
+----------------------------+---------+-----------------+--------+---------------------+

Running commands as cron jobs

If you want to run commands as cron jobs, you must configure them in yaml file.

Example:

rikudou_cron:
    commands:
      clearCache:
        command: cache:clear
        cron_expression: "*/2 * * * *"

This setting will run cache:clear every two minutes.

The config file will be created (if it doesn't already exist) when you first run any cron command (cron:list, cron:run) at %projectDir%/config/packages/rikudou_cron.yaml.

Example output from cron:list:

Classes
+----------------------------+---------+-----------------+--------+---------------------+
| Class                      | Enabled | Cron expression | Is due | Next run            |
+----------------------------+---------+-----------------+--------+---------------------+
| App\CronJobs\MyTestCronJob | no      | */5 * * * *     | no     | 2018-09-06 15:25:00 |
+----------------------------+---------+-----------------+--------+---------------------+
Commands
+-------------+-----------------+--------+---------------------+
| Command     | Cron expression | Is due | Next run            |
+-------------+-----------------+--------+---------------------+
| cache:clear | */2 * * * *     | yes    | 2018-09-06 15:24:00 |
+-------------+-----------------+--------+---------------------+