Magento 2: Custom Log

Copy<?xml version="1.0" encoding="UTF-8"?>
<!--
/**
 * di
 *
 * @copyright Copyright © 2021 Vasan. All rights reserved.
 * @author    survasp@gmail.com
 */
-->
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
    <virtualType name="Vasan\CustomLog\Model\Service\LogHandler" type="Magento\Framework\Logger\Handler\Base">
        <arguments>
            <argument name="fileName" xsi:type="string">/var/log/cust.log</argument>
        </arguments>
    </virtualType>

    <virtualType name="Vasan\CustomLog\Model\Service\Logger" type="Magento\Framework\Logger\Monolog">
        <arguments>
            <argument name="handlers" xsi:type="array">
                <item name="debug" xsi:type="object">Vasan\CustomLog\Model\Service\LogHandler</item>
            </argument>
        </arguments>
    </virtualType>

    <type name="Vasan\CustomLog\Model\Service">
        <arguments>
            <argument name="logger" xsi:type="object">Vasan\CustomLog\Model\Service\Logger</argument>
        </arguments>
    </type>

</config>

Copy<?php
/**
 * Service
 *
 * @copyright Copyright © 2021 Vasan. All rights reserved.
 * @author    survasp@gmail.com
 */

namespace Vasan\CustomLog\Model;


use Magento\Framework\App\Config\ScopeConfigInterface;
use Psr\Log\LoggerInterface;

class Service
{
    const XML_PATH_DEBUG = 'customlog/service/debug_enabled';
    
    /**
     * @var LoggerInterface
     */
    protected $logger;

    /**
     * @var ScopeConfigInterface
     */
    protected $scopeConfig;

    /**
     * @param LoggerInterface $logger
     * @param ScopeConfigInterface $scopeConfig
     */
    public function __construct(
        LoggerInterface $logger,
        ScopeConfigInterface $scopeConfig
    ) {
        $this->logger = $logger;
        $this->scopeConfig = $scopeConfig;
    }


    /**
     * @param $message
     */
    public function log($message)
    {
        $isDebugEnabled = $this->scopeConfig->getValue(static::XML_PATH_DEBUG);
        if ($isDebugEnabled) {
            $this->logger->debug($message);
        }
    }

}