exp: jaeger tracing

classes/tracer.php

@@ -0,0 +1,49 @@
+<?php
+use OpenTracing\GlobalTracer;
+use OpenTracing\Scope;
+
+class Tracer {
+	private static $instance;
+
+	public function __construct() {
+		$config = new \Jaeger\Config(
+			[
+				'sampler' => [
+					'type' => \Jaeger\SAMPLER_TYPE_CONST,
+					'param' => true,
+				],
+				'logging' => true,
+				"local_agent" => [
+					"reporting_host" => "172.17.172.39",
+					"reporting_port" => 6832
+				],
+				'dispatch_mode' => \Jaeger\Config::JAEGER_OVER_BINARY_UDP,
+			],
+			'tt-rss'
+		);
+
+		$config->initializeTracer();
+
+		register_shutdown_function(function() {
+			$tracer = GlobalTracer::get();
+			$tracer->flush();
+		});
+	}
+
+	private function _start(string $name, array $options = []) {
+		$tracer = GlobalTracer::get();
+		return $tracer->startActiveSpan($name, $options);
+	}
+
+	public static function start(string $name, array $options = []) : Scope {
+		return self::get_instance()->_start($name, $options);
+	}
+
+	public static function get_instance() : Tracer {
+		if (self::$instance == null)
+			self::$instance = new self();
+
+		return self::$instance;
+	}
+
+}