jaeger-client -> opentelemetry

vendor/open-telemetry/sdk/Propagation/PropagatorFactory.php

@@ -0,0 +1,55 @@
+<?php
+
+declare(strict_types=1);
+
+namespace OpenTelemetry\SDK\Propagation;
+
+use OpenTelemetry\API\Behavior\LogsMessagesTrait;
+use OpenTelemetry\Context\Propagation\MultiTextMapPropagator;
+use OpenTelemetry\Context\Propagation\NoopTextMapPropagator;
+use OpenTelemetry\Context\Propagation\TextMapPropagatorInterface;
+use OpenTelemetry\SDK\Common\Configuration\Configuration;
+use OpenTelemetry\SDK\Common\Configuration\Variables;
+use OpenTelemetry\SDK\Registry;
+
+class PropagatorFactory
+{
+    use LogsMessagesTrait;
+
+    public function create(): TextMapPropagatorInterface
+    {
+        $propagators = Configuration::getList(Variables::OTEL_PROPAGATORS);
+        switch (count($propagators)) {
+            case 0:
+                return new NoopTextMapPropagator();
+            case 1:
+                return $this->buildPropagator($propagators[0]);
+            default:
+                return new MultiTextMapPropagator($this->buildPropagators($propagators));
+        }
+    }
+
+    /**
+     * @return array<TextMapPropagatorInterface>
+     */
+    private function buildPropagators(array $names): array
+    {
+        $propagators = [];
+        foreach ($names as $name) {
+            $propagators[] = $this->buildPropagator($name);
+        }
+
+        return $propagators;
+    }
+
+    private function buildPropagator(string $name): TextMapPropagatorInterface
+    {
+        try {
+            return Registry::textMapPropagator($name);
+        } catch (\RuntimeException $e) {
+            self::logWarning($e->getMessage());
+        }
+
+        return NoopTextMapPropagator::getInstance();
+    }
+}