jaeger-client -> opentelemetry

vendor/open-telemetry/sdk/Metrics/MetricSourceInterface.php

@@ -0,0 +1,24 @@
+<?php
+
+declare(strict_types=1);
+
+namespace OpenTelemetry\SDK\Metrics;
+
+use OpenTelemetry\SDK\Metrics\Data\Metric;
+
+interface MetricSourceInterface
+{
+    /**
+     * Returns the last metric collection timestamp.
+     *
+     * @return int last collection timestamp
+     */
+    public function collectionTimestamp(): int;
+
+    /**
+     * Collects metric data from the underlying provider.
+     *
+     * @return Metric collected metric
+     */
+    public function collect(): Metric;
+}