Laravel接入Prometheus的代码示例-Laravel

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在原有的基础上增加Counter计数器：

namespace App\Http\Middleware;use Closure;use Illuminate\Http\Request;use traumferienwohnungen\PrometheusExporter\Middleware\AbstractResponseTimeMiddleware;class PrometheusMonitor extends AbstractResponseTimeMiddleware{    protected function getRouteNames()    {        $routeNames = [];        foreach (\Route::getRoutes() as $route){            $routeNames[] = '/'.ltrim($route->uri(), '/');        }        return $routeNames;    }    /**     * Handle an incoming request.     *     * @param  \Illuminate\Http\Request  $request     * @param  \Closure  $next     * @return mixed     */    public function handle(Request $request, Closure $next)    {        if (defined('LARAVEL_START')){            $start = LARAVEL_START;        } elseif (defined('LUMEN_START')){            $start = LUMEN_START;        } else {            $start = microtime(true);        }        $this->request = $request;        /** @var \Illuminate\Http\Response $response */        $response = $next($request);        $route_name = $this->getRouteName();        $method = $request->getMethod();        $status = $response->getStatusCode();        $duration = microtime(true) - $start;        $duration_milliseconds = $duration * 1000.0;        $this->countRequest($route_name, $method, $status, $duration_milliseconds);        $this->initRequestMetrics($method, $status);        return $response;    }    public function getRouteName(){        return request()->getRequestUri();    }    public function initRequestMetrics($method, $status)    {        $namespace = config('prometheus_exporter.namespace_http_server');        $labelNames = $this->getRequestCounterLabelNames();        $name = 'request_wuc';        $help = 'http_requests count';        $counter = $this->registry->getOrRegisterCounter(            $namespace, $name, $help, $labelNames        );        $counter->incBy(1, [$this->getRouteName(), $method, $status]);    }}

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