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<?php |
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declare(strict_types=1); |
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namespace TechDeCo\ElasticApmAgent\Convenience\Middleware; |
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use Psr\Http\Message\ResponseInterface; |
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use Psr\Http\Message\ServerRequestInterface; |
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use Psr\Http\Server\RequestHandlerInterface; |
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use Ramsey\Uuid\Exception\InvalidUuidStringException; |
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use Ramsey\Uuid\Uuid; |
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use Ramsey\Uuid\UuidInterface; |
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use TechDeCo\ElasticApmAgent\Client; |
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use TechDeCo\ElasticApmAgent\Convenience\HttplugHttpClient\HttpClientWrapper; |
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use TechDeCo\ElasticApmAgent\Convenience\OpenTransaction; |
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use TechDeCo\ElasticApmAgent\Exception\ClientException; |
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use TechDeCo\ElasticApmAgent\Message\Process; |
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use TechDeCo\ElasticApmAgent\Message\Service; |
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use TechDeCo\ElasticApmAgent\Message\System; |
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use TechDeCo\ElasticApmAgent\Message\Timestamp; |
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use TechDeCo\ElasticApmAgent\Request\Transaction; |
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use function sprintf; |
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final class TransactionMiddleware extends Middleware |
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{ |
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public const TRANSACTION_ATTRIBUTE = 'apm-transaction'; |
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/** |
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* @var Capturer[] |
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*/ |
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private $capturerList = []; |
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public function __construct( |
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Client $client, |
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Service $service, |
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Process $process, |
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System $system, |
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Capturer ...$capturerList |
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) { |
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parent::__construct($client, $service, $process, $system); |
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$this->capturerList = $capturerList; |
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} |
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/** |
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* @throws ClientException |
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*/ |
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public function process(ServerRequestInterface $request, RequestHandlerInterface $handler): ResponseInterface |
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{ |
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$openTransaction = new OpenTransaction( |
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Uuid::uuid4(), |
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sprintf('%s %s', $request->getMethod(), $request->getUri()->__toString()), |
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new Timestamp(), |
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'request', |
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$this->getCorrelationId($request) |
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); |
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foreach ($this->capturerList as $capturer) { |
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$capturer->captureFromRequest($openTransaction, $request); |
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} |
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try { |
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$request = $request->withAttribute(self::TRANSACTION_ATTRIBUTE, $openTransaction); |
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$response = $handler->handle($request); |
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foreach ($this->capturerList as $capturer) { |
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$capturer->captureFromResponse($openTransaction, $response); |
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} |
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return $response; |
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} finally { |
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$transaction = (new Transaction($this->service, $openTransaction->toTransaction())) |
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->onSystem($this->system) |
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->inProcess($this->process); |
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$this->client->sendTransaction($transaction); |
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} |
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} |
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private function getCorrelationId(ServerRequestInterface $request): UuidInterface |
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{ |
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try { |
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return Uuid::fromString($request->getHeaderLine(HttpClientWrapper::CORRELATION_ID_HEADER)); |
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} catch (InvalidUuidStringException $e) { |
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return Uuid::uuid4(); |
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} |
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} |
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} |
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frankkoornstra /
elastic-apm-agent
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