Drupal Logger

Introduction

Drupal Logger is a module in the Drupal CMS that provides a flexible system for recording and managing logs. It allows developers to easily log important information, errors, warnings, and other events that occur during the execution of a Drupal site.

Features

• Logging Levels: Drupal Logger supports different levels of logging, including debug, info, notice, warning, error, critical, and alert. This allows developers to categorize and prioritize log entries based on their importance.
• Logging Channels: The module allows developers to define different logging channels, such as database, file, syslog, etc. Developers can specify where the logs should be stored, making it easier to manage and analyze them later.
• Log Messages: Drupal Logger provides a robust system for logging messages. Developers can include contextual information, such as timestamps, user IDs, request URLs, and custom variables, along with the log message. This helps in debugging and troubleshooting.
• Custom Loggers: The module allows developers to create custom loggers, enabling them to implement specific logging functionality as per their requirements. Developers can extend the default logger or create new ones to suit their needs.
• Log Filtering and Reporting: Drupal Logger provides filtering options to view logs based on logging level, channel, time period, and other criteria. It also supports generating reports, which can be helpful in identifying patterns, errors, and performance issues.

Usage

Logging a Message

To log a message using the Drupal Logger module, you can use the following code snippet:

\Drupal::logger('my_module')->debug('This is a debug message.');

Here, 'my_module' is the logging channel name, and 'This is a debug message.' is the log message. You can replace 'debug' with any other logging level of your choice.

Creating a Custom Logger

To create a custom logger in Drupal Logger, you can extend the LoggerChannelInterface class or implement it in your custom class. Here's an example of creating a custom logger:

use Drupal\Core\Logger\LoggerChannelInterface;
use Psr\Log\LoggerInterface;

class MyCustomLogger implements LoggerChannelInterface {

  protected $logger;

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

  public function log($level, $message, array $context = array()) {
    $this->logger->log($level, $message, $context);
  }

}

This custom logger can then be used like any other logger in Drupal Logger.

Viewing Logs

Logs can be viewed in various ways in Drupal. You can use contributed modules like "Devel" or access the logs directly in the Drupal admin panel. The method may vary based on the specific configuration and modules installed on your Drupal site.

For more information on Drupal Logger, refer to the official documentation here.

Note: The above code snippets and usage examples are based on Drupal 8/9 versions.