Live components - properly set sentry transaction name

Author: JanMikes

config/packages/sentry.php

@@ -26,7 +26,6 @@
                 NotFoundHttpException::class,
             ],
             'traces_sampler' => 'sentry.traces_sampler',
-            'before_send_transaction' => 'sentry.before_send_transaction',
             'profiles_sample_rate' => 1.0, // Profile all traced requests (sampling controlled by traces_sampler)
             'ignore_transactions' => [
                 // Symfony profiler/debug toolbar routes

config/services.php

@@ -148,7 +148,4 @@
 
     $services->set('sentry.traces_sampler', \Closure::class)
         ->factory([service(SentryTracesSampler::class), '__invoke']);
-
-    $services->set('sentry.before_send_transaction', \Closure::class)
-        ->factory([service(SentryTransactionNameEnhancer::class), '__invoke']);
 };

src/Services/SentryLiveComponentTransactionListener.php

@@ -0,0 +1,58 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SpeedPuzzling\Web\Services;
+
+use Sentry\State\HubInterface;
+use Symfony\Component\EventDispatcher\Attribute\AsEventListener;
+use Symfony\Component\HttpKernel\Event\ResponseEvent;
+use Symfony\Component\HttpKernel\KernelEvents;
+
+/**
+ * Enhances Sentry transaction names for Live Component requests.
+ *
+ * Uses RESPONSE event to ensure the component name and action are fully resolved
+ * after the controller has executed.
+ */
+#[AsEventListener(event: KernelEvents::RESPONSE, priority: 10)]
+readonly final class SentryLiveComponentTransactionListener
+{
+    public function __construct(
+        private HubInterface $hub,
+    ) {
+    }
+
+    public function __invoke(ResponseEvent $event): void
+    {
+        if ($event->isMainRequest() === false) {
+            return;
+        }
+
+        $request = $event->getRequest();
+
+        if ($request->attributes->has('_live_component') === false) {
+            return;
+        }
+
+        $transaction = $this->hub->getTransaction();
+
+        if ($transaction === null) {
+            return;
+        }
+
+        $componentName = $request->attributes->get('_component_name')
+            ?? $request->attributes->get('_live_component');
+
+        if (!is_string($componentName) || $componentName === '') {
+            return;
+        }
+
+        $liveAction = $request->attributes->get('_live_action');
+        $action = is_string($liveAction) && $liveAction !== '' ? $liveAction : 'render';
+
+        $transaction->setName(
+            sprintf('LiveComponent::%s::%s', $componentName, $action)
+        );
+    }
+}