feat: Add support for Dynamic Sampling

src/Sentry/Laravel/Console/TestCommand.php

@@ -140,6 +140,7 @@ public function log($level, $message, array $context = []): void
             $transactionContext = new TransactionContext();
             $transactionContext->setSampled(true);
             $transactionContext->setName('Sentry Test Transaction');
+            $transactionContext->setSource(TransactionSource::custom());
             $transactionContext->setOp('sentry.test');
 
             $transaction = $hub->startTransaction($transactionContext);

src/Sentry/Laravel/Integration.php

@@ -247,7 +247,25 @@ public static function sentryTracingMeta(): string
         }
 
         $content = sprintf('<meta name="sentry-trace" content="%s"/>', $span->toTraceparent());
-        // $content .= sprintf('<meta name="sentry-trace-data" content="%s"/>', $span->getDescription());
+
+        return $content;
+    }
+
+    /**
+     * Retrieve the meta tags with baggage information to link this request to front-end requests.
+     * This propagates the Dynamic Sampling Context.
+     *
+     * @return string
+     */
+    public static function sentryBaggageMeta(): string
+    {
+        $span = self::currentTracingSpan();
+
+        if ($span === null) {
+            return '';
+        }
+
+        $content = sprintf('<meta name="baggage" content="%s"/>', $span->toBaggage());
 
         return $content;
     }

src/Sentry/Laravel/Tracing/EventHandler.php

@@ -16,11 +16,14 @@
 use Sentry\Tracing\SpanContext;
 use Sentry\Tracing\SpanStatus;
 use Sentry\Tracing\TransactionContext;
+use Sentry\Tracing\TransactionSource;
 
 class EventHandler
 {
     public const QUEUE_PAYLOAD_TRACE_PARENT_DATA = 'sentry_trace_parent_data';
 
+    public const QUEUE_PAYLOAD_BAGGAGE_DATA = 'sentry_baggage_data';
+
     /**
      * Map event handlers to events.
      *
@@ -153,6 +156,7 @@ public function subscribeQueueEvents(QueueManager $queue): void
 
                 if ($currentSpan !== null && $payload !== null) {
                     $payload[self::QUEUE_PAYLOAD_TRACE_PARENT_DATA] = $currentSpan->toTraceparent();
+                    $payload[self::QUEUE_PAYLOAD_BAGGAGE_DATA] = $currentSpan->toBaggage();
                 }
 
                 return $payload;
@@ -294,10 +298,11 @@ protected function queueJobProcessingHandler(QueueEvents\JobProcessing $event)
 
         if ($parentSpan === null) {
             $traceParent = $event->job->payload()[self::QUEUE_PAYLOAD_TRACE_PARENT_DATA] ?? null;
+            $baggage = $event->job->payload()[self::QUEUE_PAYLOAD_BAGGAGE_DATA] ?? null;
 
             $context = $traceParent === null
                 ? new TransactionContext
-                : TransactionContext::fromSentryTrace($traceParent);
+                : TransactionContext::fromHeaders($traceParent, $baggage);
 
             // If the parent transaction was not sampled we also stop the queue job from being recorded
             if ($context->getParentSampled() === false) {
@@ -325,6 +330,7 @@ protected function queueJobProcessingHandler(QueueEvents\JobProcessing $event)
 
         if ($context instanceof TransactionContext) {
             $context->setName($resolvedJobName ?? $event->job->getName());
+            $context->setSource(TransactionSource::task());
         }
 
         $context->setOp('queue.process');

src/Sentry/Laravel/Tracing/Middleware.php

@@ -12,6 +12,7 @@
 use Sentry\Tracing\Span;
 use Sentry\Tracing\SpanContext;
 use Sentry\Tracing\TransactionContext;
+use Sentry\Tracing\TransactionSource;
 
 class Middleware
 {
@@ -103,12 +104,14 @@ private function startTransaction(Request $request, HubInterface $sentry): void
     {
         $requestStartTime = $request->server('REQUEST_TIME_FLOAT', microtime(true));
         $sentryTraceHeader = $request->header('sentry-trace');
+        $baggageHeader = $request->header('baggage');
 
         $context = $sentryTraceHeader
-            ? TransactionContext::fromSentryTrace($sentryTraceHeader)
+            ? TransactionContext::fromHeaders($sentryTraceHeader, $baggageHeader)
             : new TransactionContext;
 
         $context->setOp('http.server');
+        $context->setSource(TransactionSource::url());
         $context->setData([
             'url' => '/' . ltrim($request->path(), '/'),
             'method' => strtoupper($request->method()),