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|
<?php
declare(strict_types=1);
namespace OpenTelemetry\SDK\Logs;
use Psr\Log\InvalidArgumentException;
use Psr\Log\LoggerInterface;
use Psr\Log\LoggerTrait;
use Psr\Log\LogLevel;
use ReflectionClass;
use Throwable;
class SimplePsrFileLogger implements LoggerInterface
{
use LoggerTrait;
private const DEFAULT_LOGGER_NAME = 'otel';
private static ?array $logLevels = null;
private string $filename;
private string $loggerName ;
/**
* @param string $filename
*/
public function __construct(string $filename, string $loggerName = self::DEFAULT_LOGGER_NAME)
{
$this->filename = $filename;
$this->loggerName = $loggerName;
}
/**
* @psalm-suppress MoreSpecificImplementedParamType
*/
public function log($level, $message, array $context = []): void
{
$level = strtolower($level);
if (!in_array($level, self::getLogLevels(), true)) {
throw new InvalidArgumentException(
sprintf('Invalid Log level: "%s"', $level)
);
}
file_put_contents($this->filename, $this->formatLog((string) $level, (string) $message, $context), FILE_APPEND);
}
/**
* @param string $level
* @param string $message
* @param array $context
* @return string
*/
private function formatLog(string $level, string $message, array $context = []): string
{
try {
$encodedContext = json_encode($context, JSON_THROW_ON_ERROR);
} catch (Throwable $t) {
$encodedContext = sprintf('(Could not encode context: %s)', $t->getMessage());
}
return sprintf(
'[%s] %s %s: %s %s%s',
date(DATE_RFC3339_EXTENDED),
$this->loggerName,
$level,
$message,
$encodedContext,
PHP_EOL
);
}
/**
* @return array
*/
private static function getLogLevels(): array
{
return self::$logLevels ?? self::$logLevels = (new ReflectionClass(LogLevel::class))->getConstants();
}
}
|
