Controller to show Phystrix metrics using symfony2 phystrix-bundle config

config.yml

odesk_phystrix:
    default:
        # Whether fallback logic of the phystrix command is enabled
        fallback: false
        circuitBreaker:
            # How many failed request it might be before we open the circuit (disallow consecutive requests)
            errorThresholdPercentage: 5
            # If true, the circuit breaker will always be open regardless the metrics
            forceOpen: false
            # If true, the circuit breaker will always be closed, allowing all requests, regardless the metrics
            forceClosed: false
            # How many requests we need minimally before we can start making decisions about service stability
            requestVolumeThreshold: 1
            # For how long to wait before attempting to access a failing service
            sleepWindowInMilliseconds: 5000
        metrics:
            # This is for caching metrics so they are not recalculated more often than needed
            healthSnapshotIntervalInMilliseconds: 1000
            # The period of time within which we the stats are collected
            rollingStatisticalWindowInMilliseconds: 50000
            # The more buckets the more precise and actual the stats and slower the calculation.
            rollingStatisticalWindowBuckets: 10
        # Request cache, if enabled and a command has getCacheKey implemented caches results within current http request
        requestCache: false
        # Request log collects all commands executed within current http request
        requestLog: true

PhystrixController.php

// When working with Phystrix-bundle you must supply configuration in config.yml.
// Phystrix-Dashboard offers helper classes to serve phystrix metrics but you need to pass a config array with
// the config.
// Next code shows how you can create a symfony2 controller that passes the phystrix config.yml configuration and
// avoids duplications.

<?php

namespace MyBundle\Controller;

use Odesk\PhystrixDashboard\MetricsEventStream\ApcMetricsPoller;
use Odesk\PhystrixDashboard\MetricsEventStream\MetricsServer;
use Sensio\Bundle\FrameworkExtraBundle\Configuration\Route;
use Symfony\Bundle\FrameworkBundle\Controller\Controller;
use Symfony\Component\HttpFoundation\StreamedResponse;
use Zend\Config\Config;

class PhystrixController extends Controller
{
    /**
     * Streaming response to return Phystrix statistics.
     *
     * @Route("/phystrix_status", name="phystrix_status")
     */
    public function statusAction()
    {
        // Made this end point accesible from local host in production environment
        if ('prod' === $this->get('kernel')->getEnvironment()) {
            if (isset($_SERVER['HTTP_CLIENT_IP'])
                || isset($_SERVER['HTTP_X_FORWARDED_FOR'])
                || !(in_array(@$_SERVER['REMOTE_ADDR'], array('127.0.0.1', 'fe80::1', '::1')) || php_sapi_name() === 'cli-server')
            ) {
                header('HTTP/1.0 403 Forbidden');
                exit('You are not allowed to access this file.');
            }
        }

        $response = new StreamedResponse();
        $response->setCallback(function () {

            // Get phystrix data configuration
            $configData = $this->getParameter('phystrix.configuration.data');

            $config = new Config($configData);
            $metricsPoller = new ApcMetricsPoller($config);
            $metricsServer = new MetricsServer($metricsPoller);
            $metricsServer->run();
        });
        $response->send();
    }
}