Inference Logging with Symfony

Overview

Inference operation logging with Symfony-style context.

Example

<?php
require 'examples/boot.php';

use Cognesy\Events\Dispatchers\EventDispatcher;
use Cognesy\Logging\Enrichers\LazyEnricher;
use Cognesy\Logging\Filters\LogLevelFilter;
use Cognesy\Logging\Formatters\MessageTemplateFormatter;
use Cognesy\Logging\Pipeline\LoggingPipeline;
use Cognesy\Logging\Writers\PsrLoggerWriter;
use Cognesy\Messages\Messages;
use Cognesy\Polyglot\Inference\Config\LLMConfig;
use Cognesy\Polyglot\Inference\Inference;
use Cognesy\Polyglot\Inference\InferenceRuntime;
use Monolog\Handler\StreamHandler;
use Monolog\Logger;
use Symfony\Component\HttpFoundation\Request;

// Mock Symfony request
$request = Request::create('/api/stream');
$request->attributes->set('_route', 'api.stream');

// Create logger
$logger = new Logger('inference');
$logger->pushHandler(new StreamHandler('php://stdout', Logger::DEBUG));

// Create pipeline with Symfony context
$pipeline = LoggingPipeline::create()
    ->filter(new LogLevelFilter('debug'))
    ->enrich(LazyEnricher::framework(fn () => [
        'route' => $request->attributes->get('_route'),
    ]))
    ->format(new MessageTemplateFormatter([
        \Cognesy\Polyglot\Inference\Events\InferenceRequested::class => '🤖 [SYMFONY] Inference requested: {provider}/{model} (Route: {framework.route})',
        \Cognesy\Polyglot\Inference\Events\InferenceResponseCreated::class => '✅ [SYMFONY] Inference completed: {provider}/{model}',
    ], channel: 'inference'))
    ->write(new PsrLoggerWriter($logger))
    ->build();

echo "📋 About to demonstrate Inference logging with Symfony...\n\n";

// Create inference with logging
$events = new EventDispatcher;
$events->wiretap($pipeline);
$inference = Inference::fromRuntime(InferenceRuntime::fromConfig(
    config: LLMConfig::fromPreset('openai'),
    events: $events,
));

echo "🚀 Starting simple Inference to demonstrate logging...\n";

$response = $inference
    ->withMessages(Messages::fromString('What is the capital of France?'))
    ->withMaxTokens(50)
    ->get();

echo "\n✅ Inference completed!\n";

// Handle response properly - it might be a string or object
if (is_string($response)) {
    echo '📊 Response: '.($response ?: 'Empty response')."\n";
} else {
    echo '📊 Response: '.($response->content ?? 'Response object has no content property')."\n";
}

assert(!empty($response));
?>

// TODO: Add "Sample Output" section showing actual log messages
// Example format:
// ### Sample Output
// 📋 About to demonstrate Inference logging with Symfony...
// 🚀 Starting Inference request...
// [2025-12-07 01:18:13] inference.DEBUG: 🔄 [Symfony] Inference requested: openai/gpt-4o-mini
// [2025-12-07 01:18:14] inference.DEBUG: ✅ [Symfony] Inference completed: openai/gpt-4o-mini
// ✅ Inference completed!
// 📊 Response: The capital of France is Paris.