How to run cron job at a particular time in Magento 2?

Question

I want to create a cron job which update product price which are disabled and the cron run at a specific time 1 time in a day.

I have created a custom basic module from taking reference from https://www.mageplaza.com/devdocs/magento-2-create-cron-job/

My crontab.xml (path : app/code/Product/Cron/etc/crontab.xml )

<?xml version="1.0" ?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_Cron:etc/crontab.xsd">
<group id="default">
    <job instance="Product\Cron\Cron\Test" method="execute" name="mageplaza_helloworld_cron">
        <schedule>*/1 * * * *</schedule>
    </job>
</group>
</config>

my test.php is

<?php

namespace Cron\Run\Cron; (path : app/code/Product/Cron/Cron/Test.php )

class Test
{

public function execute()
{

    $writer = new \Zend\Log\Writer\Stream(BP . '/var/log/cron.log');
    $logger = new \Zend\Log\Logger();
    $logger->addWriter($writer);
    $logger->info(__METHOD__);

    return $this;

}
}

But it does't show me message in cron.log file. What am i missing any help is appreciated.

Answer 1

Add This Files to your Custom Module and first check your module is enable or not. Your Module must be enable.

Create a class to run cron

app/code/VendoreName/ModuleName/Cron

Test.php

<?php
namespace VendoreName\ModuleName\Cron;

use Psr\Log\LoggerInterface;

class Test {
    protected $logger;

    public function __construct(LoggerInterface $logger) {
        $this->logger = $logger;
    }

    public function execute() {
        $this->logger->info('Cron Works');
    }
}

Create crontab.xml

app/code/VendoreName/ModuleName/etc

crontab.xml

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_Cron:etc/crontab.xsd">
    <group id="default">
        <job name="custom_cronjob" instance="VendoreName\ModuleName\Cron\Test" method="execute">
            <schedule>* * * * *</schedule>
        </job>
    </group>
</config>

Compile and cache clean

bin/magento s:up
bin/magento setup:di:compile
bin/magento cache:clean

Verify the cron job

This step shows how to verify the custom cron job successfully using a SQL query on the cron_schedule database table.

1. Run Magento cron jobs:

bin/magento cron:run

2. Enter the magento cron:run command two or three times.

The first time you enter the command, it queues jobs; subsequently, the cron jobs are run. You must enter the command at least twice.

3. Run the SQL query SELECT * from cron_schedule WHERE job_code like '%custom%'

4. Verify messages are written to Magento’s system log:

var/www/html/magento_root/var/log/system.log

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I Hope This Helps You.