RoadRunner PSR Logger

A PSR-3 compatible logger implementation that integrates with RoadRunner's logging system via RPC calls. This package provides a bridge between PSR-3 logging standards and RoadRunner's centralized logging infrastructure.

RPC Logger vs STDERR Logger

The RPC logger provides several advantages over RoadRunner's built-in STDERR Logger:

• Log Level Control: RPC Logger controls the actual log level sent to RoadRunner server, ensuring proper level filtering and display in RoadRunner logs. Messages from STDERR Logger are processed by RoadRunner with info level.
• Context Support: RPC logger preserves structured context data (arrays, objects). STDERR Logger outputs only the message string, ignoring context.

Installation

composer require roadrunner/psr-logger

Usage

Basic Setup

use RoadRunner\Logger\Logger as AppLogger;
use RoadRunner\PsrLogger\RpcLogger;

// Initialize the RoadRunner app logger
$rpc = \Spiral\Goridge\RPC\RPC::create('127.0.0.1:6001');
$appLogger = new AppLogger($rpc);

// Create the PSR-3 compatible logger
$logger = new RpcLogger($appLogger);

Logging Examples

// Basic logging with different levels
$logger->emergency('System is unusable');
$logger->alert('Action must be taken immediately');
$logger->critical('Critical conditions');
$logger->error('Runtime errors');
$logger->warning('Warning conditions');
$logger->notice('Normal but significant condition');
$logger->info('Informational messages');
$logger->debug('Debug-level messages');

// Logging with context data
$logger->info('User logged in', [
    'user_id' => 123,
    'ip_address' => '192.168.1.1',
    'user_agent' => 'Mozilla/5.0...'
]);

// Using the generic log method
$logger->log(\Psr\Log\LogLevel::ERROR, 'Something went wrong', [
    'exception' => $exception->getMessage(),
    'trace' => $exception->getTraceAsString()
]);

Log Levels

Supported Log Level Types

The logger accepts log levels in multiple formats:

• String values: 'error', 'warning', 'info', 'debug'
• PSR-3 constants: \Psr\Log\LogLevel::ERROR, \Psr\Log\LogLevel::WARNING
• Stringable objects: Any object implementing \Stringable interface
• BackedEnum values: PHP 8.1+ backed enums with string values

// String levels
$logger->log('error', 'Error message');

// PSR-3 constants
$logger->log(\Psr\Log\LogLevel::WARNING, 'Warning message');

// BackedEnum example
enum LogLevel: string
{
    case Error = 'error';
    case Warning = 'warning';
    case Info = 'info';
    case Debug = 'debug';
}

$logger->log(LogLevel::Error, 'Error via enum');

Log Level Mapping

The logger maps PSR-3 log levels to RoadRunner logging methods as follows:

PSR-3 Level	RoadRunner Method
emergency	error
alert	error
critical	error
error	error
warning	warning
notice	info
info	info
debug	debug

Context Handling

The logger supports structured logging with context arrays. When context data is provided, it's passed through to the underlying RoadRunner logger, which can handle complex data structures including:

• Scalar values (string, int, float, bool)
• Arrays and nested arrays
• Objects that implement \Stringable
• DateTime objects and exceptions (TODO)

$logger->info('Order processed', [
    'order_id' => 12345,
    'customer' => [
        'id' => 67890,
        'email' => 'customer@example.com'
    ],
    'amount' => 99.99,
    'processed_at' => new \DateTime(),
    'metadata' => [
        'source' => 'web',
        'campaign' => 'summer_sale'
    ]
]);