stop calling spans scopes

13 files changed, 187 insertions, 167 deletions

diff --git a/backend.php b/backend.php
index 220d0b7b7..b4e118d62 100644
--- a/backend.php
+++ b/backend.php
@@ -30,10 +30,10 @@
 	$op = (string)clean($op);
 	$method = (string)clean($method);
 
-	$scope = Tracer::start(__FILE__);
+	$span = Tracer::start(__FILE__);
 
-	register_shutdown_function(function() use ($scope) {
-	 	$scope->end();
+	register_shutdown_function(function() use ($span) {
+	 	$span->end();
 	});
 
 	startup_gettext();
@@ -55,7 +55,7 @@
 			header("Content-Type: text/json");
 			print Errors::to_json(Errors::E_UNAUTHORIZED);
 
-			$scope->setAttribute('error', Errors::E_UNAUTHORIZED);
+			$span->setAttribute('error', Errors::E_UNAUTHORIZED);
 			return;
 		}
 		UserHelper::load_user_plugins($_SESSION["uid"]);
@@ -64,7 +64,7 @@
 	if (Config::is_migration_needed()) {
 		print Errors::to_json(Errors::E_SCHEMA_MISMATCH);
 
-		$scope->setAttribute('error', Errors::E_SCHEMA_MISMATCH);
+		$span->setAttribute('error', Errors::E_SCHEMA_MISMATCH);
 		return;
 	}
 
@@ -127,7 +127,7 @@
 			header("Content-Type: text/json");
 			print Errors::to_json(Errors::E_UNAUTHORIZED);
 
-			$scope->setAttribute('error', Errors::E_UNAUTHORIZED);
+			$span->setAttribute('error', Errors::E_UNAUTHORIZED);
 			return;
 		}
 
@@ -140,16 +140,16 @@
 		}
 
 		if (implements_interface($handler, 'IHandler')) {
-			$scope->addEvent("construct/$op");
+			$span->addEvent("construct/$op");
 			$handler->__construct($_REQUEST);
 
 			if (validate_csrf($csrf_token) || $handler->csrf_ignore($method)) {
 
-				$scope->addEvent("before/$method");
+				$span->addEvent("before/$method");
 				$before = $handler->before($method);
 
 				if ($before) {
-					$scope->addEvent("method/$method");
+					$span->addEvent("method/$method");
 					if ($method && method_exists($handler, $method)) {
 						$reflection = new ReflectionMethod($handler, $method);
 
@@ -159,7 +159,7 @@
 							user_error("Refusing to invoke method $method of handler $op which has required parameters.", E_USER_WARNING);
 							header("Content-Type: text/json");
 
-							$scope->setAttribute('error', Errors::E_UNAUTHORIZED);
+							$span->setAttribute('error', Errors::E_UNAUTHORIZED);
 							print Errors::to_json(Errors::E_UNAUTHORIZED);
 						}
 					} else {
@@ -168,19 +168,19 @@
 						} else {
 							header("Content-Type: text/json");
 
-							$scope->setAttribute('error', Errors::E_UNKNOWN_METHOD);
+							$span->setAttribute('error', Errors::E_UNKNOWN_METHOD);
 							print Errors::to_json(Errors::E_UNKNOWN_METHOD, ["info" => get_class($handler) . "->$method"]);
 						}
 					}
 
-					$scope->addEvent("after/$method");
+					$span->addEvent("after/$method");
 					$handler->after();
 					return;
 				} else {
 					header("Content-Type: text/json");
 					print Errors::to_json(Errors::E_UNAUTHORIZED);
 
-					$scope->setAttribute('error', Errors::E_UNAUTHORIZED);
+					$span->setAttribute('error', Errors::E_UNAUTHORIZED);
 					return;
 				}
 			} else {
@@ -188,7 +188,7 @@
 				header("Content-Type: text/json");
 				print Errors::to_json(Errors::E_UNAUTHORIZED);
 
-				$scope->setAttribute('error', Errors::E_UNAUTHORIZED);
+				$span->setAttribute('error', Errors::E_UNAUTHORIZED);
 				return;
 			}
 		}
@@ -197,4 +197,4 @@
 	header("Content-Type: text/json");
 	print Errors::to_json(Errors::E_UNKNOWN_METHOD, [ "info" => (isset($handler) ? get_class($handler) : "UNKNOWN:".$op) . "->$method"]);
 
-	$scope->setAttribute('error', Errors::E_UNKNOWN_METHOD);
+	$span->setAttribute('error', Errors::E_UNKNOWN_METHOD);
diff --git a/classes/article.php b/classes/article.php
index c14804485..2aeb31b99 100755
--- a/classes/article.php
+++ b/classes/article.php
@@ -298,7 +298,7 @@ class Article extends Handler_Protected {
 	 * @return array{'formatted': string, 'entries': array<int, array<string, mixed>>}
 	 */
 	static function _format_enclosures(int $id, bool $always_display_enclosures, string $article_content, bool $hide_images = false): array {
-		$scope = Tracer::start(__METHOD__);
+		$span = Tracer::start(__METHOD__);
 
 		$enclosures = self::_get_enclosures($id);
 		$enclosures_formatted = "";
@@ -326,7 +326,7 @@ class Article extends Handler_Protected {
 			$enclosures_formatted, $enclosures, $id, $always_display_enclosures, $article_content, $hide_images);
 
 		if (!empty($enclosures_formatted)) {
-			$scope->end();
+			$span->end();
 			return [
 					'formatted' => $enclosures_formatted,
 					'entries' => []
@@ -370,7 +370,7 @@ class Article extends Handler_Protected {
 			}
 		}
 
-		$scope->end();
+		$span->end();
 		return $rv;
 	}
 
@@ -378,7 +378,7 @@ class Article extends Handler_Protected {
 	 * @return array<int, string>
 	 */
 	static function _get_tags(int $id, int $owner_uid = 0, ?string $tag_cache = null): array {
-		$scope = Tracer::start(__METHOD__);
+		$span = Tracer::start(__METHOD__);
 
 		$a_id = $id;
 
@@ -427,7 +427,7 @@ class Article extends Handler_Protected {
 			$sth->execute([$tags_str, $id, $owner_uid]);
 		}
 
-		$scope->end();
+		$span->end();
 		return $tags;
 	}
 
@@ -522,7 +522,7 @@ class Article extends Handler_Protected {
 	 * @return array<int, array<int, int|string>>
 	 */
 	static function _get_labels(int $id, ?int $owner_uid = null): array {
-		$scope = Tracer::start(__METHOD__, []);
+		$span = Tracer::start(__METHOD__);
 
 		$rv = array();
 
@@ -569,7 +569,7 @@ class Article extends Handler_Protected {
 		else
 			Labels::update_cache($owner_uid, $id, array("no-labels" => 1));
 
-		$scope->end();
+		$span->end();
 
 		return $rv;
 	}
@@ -581,7 +581,7 @@ class Article extends Handler_Protected {
 	 * @return array<int, Article::ARTICLE_KIND_*|string>
 	 */
 	static function _get_image(array $enclosures, string $content, string $site_url, array $headline) {
-		$scope = Tracer::start(__METHOD__);
+		$span = Tracer::start(__METHOD__);
 
 		$article_image = "";
 		$article_stream = "";
@@ -660,7 +660,7 @@ class Article extends Handler_Protected {
 		if ($article_stream && $cache->exists(sha1($article_stream)))
 			$article_stream = $cache->get_url(sha1($article_stream));
 
-		$scope->end();
+		$span->end();
 
 		return [$article_image, $article_stream, $article_kind];
 	}
@@ -675,7 +675,7 @@ class Article extends Handler_Protected {
 		if (count($article_ids) == 0)
 			return [];
 
-		$scope = Tracer::start(__METHOD__);
+		$span = Tracer::start(__METHOD__);
 
 		$entries = ORM::for_table('ttrss_entries')
 			->table_alias('e')
@@ -696,7 +696,7 @@ class Article extends Handler_Protected {
 			}
 		}
 
-		$scope->end();
+		$span->end();
 
 		return array_unique($rv);
 	}
@@ -709,7 +709,7 @@ class Article extends Handler_Protected {
 		if (count($article_ids) == 0)
 			return [];
 
-		$scope = Tracer::start(__METHOD__);
+		$span = Tracer::start(__METHOD__);
 
 		$entries = ORM::for_table('ttrss_entries')
 			->table_alias('e')
@@ -723,7 +723,7 @@ class Article extends Handler_Protected {
 			array_push($rv, $entry->feed_id);
 		}
 
-		$scope->end();
+		$span->end();
 
 		return array_unique($rv);
 	}
diff --git a/classes/counters.php b/classes/counters.php
index 1f5988568..948e6ee1d 100644
--- a/classes/counters.php
+++ b/classes/counters.php
@@ -145,7 +145,7 @@ class Counters {
 	 * @return array<int, array<string, int|string>>
 	 */
 	private static function get_feeds(array $feed_ids = null): array {
-		$scope = Tracer::start(__METHOD__);
+		$span = Tracer::start(__METHOD__);
 
 		$ret = [];
 
@@ -212,7 +212,7 @@ class Counters {
 
 		}
 
-		$scope->end();
+		$span->end();
 
 		return $ret;
 	}
@@ -221,7 +221,7 @@ class Counters {
 	 * @return array<int, array<string, int|string>>
 	 */
 	private static function get_global(): array {
-		$scope = Tracer::start(__METHOD__);
+		$span = Tracer::start(__METHOD__);
 
 		$ret = [
 			[
@@ -239,7 +239,7 @@ class Counters {
 			"counter" => $subcribed_feeds
 		]);
 
-		$scope->end();
+		$span->end();
 
 		return $ret;
 	}
@@ -248,7 +248,7 @@ class Counters {
 	 * @return array<int, array<string, int|string>>
 	 */
 	private static function get_virt(): array {
-		$scope = Tracer::start(__METHOD__);
+		$span = Tracer::start(__METHOD__);
 
 		$ret = [];
 
@@ -295,7 +295,7 @@ class Counters {
 			}
 		}
 
-		$scope->end();
+		$span->end();
 		return $ret;
 	}
 
@@ -304,7 +304,7 @@ class Counters {
 	 * @return array<int, array<string, int|string>>
 	 */
 	static function get_labels(array $label_ids = null): array {
-		$scope = Tracer::start(__METHOD__);
+		$span = Tracer::start(__METHOD__);
 
 		$ret = [];
 
@@ -356,7 +356,7 @@ class Counters {
 			array_push($ret, $cv);
 		}
 
-		$scope->end();
+		$span->end();
 		return $ret;
 	}
 }
diff --git a/classes/digest.php b/classes/digest.php
index 02fa76bf0..27009530f 100644
--- a/classes/digest.php
+++ b/classes/digest.php
@@ -2,7 +2,7 @@
 class Digest
 {
 	static function send_headlines_digests(): void {
-		$scope = Tracer::start(__METHOD__);
+		$span = Tracer::start(__METHOD__);
 
 		$user_limit = 15; // amount of users to process (e.g. emails to send out)
 		$limit = 1000; // maximum amount of headlines to include
@@ -77,7 +77,7 @@ class Digest
 			}
 		}
 
-		$scope->end();
+		$span->end();
 		Debug::log("All done.");
 	}
 
diff --git a/classes/diskcache.php b/classes/diskcache.php
index 7bc5835a4..290fbd9c3 100644
--- a/classes/diskcache.php
+++ b/classes/diskcache.php
@@ -221,9 +221,11 @@ class DiskCache implements Cache_Adapter {
 	}
 
 	public function remove(string $filename): bool {
-		$scope = Tracer::start(__METHOD__, ['filename' => $filename]);
+		$span = Tracer::start(__METHOD__);
+		$span->setAttribute('file.name', $filename);
+
 		$rc = $this->adapter->remove($filename);
-		$scope->end();
+		$span->end();
 
 		return $rc;
 	}
@@ -249,8 +251,8 @@ class DiskCache implements Cache_Adapter {
 	}
 
 	public function exists(string $filename): bool {
-		$scope = OpenTelemetry\API\Trace\Span::getCurrent();
-		$scope->addEvent("DiskCache::exists: $filename");
+		$span = OpenTelemetry\API\Trace\Span::getCurrent();
+		$span->addEvent("DiskCache::exists: $filename");
 
 		$rc = $this->adapter->exists(basename($filename));
 
@@ -261,9 +263,11 @@ class DiskCache implements Cache_Adapter {
 	 * @return int|false -1 if the file doesn't exist, false if an error occurred, size in bytes otherwise
 	 */
 	public function get_size(string $filename) {
-		$scope = Tracer::start(__METHOD__, ['filename' => $filename]);
+		$span = Tracer::start(__METHOD__);
+		$span->setAttribute('file.name', $filename);
+
 		$rc = $this->adapter->get_size(basename($filename));
-		$scope->end();
+		$span->end();
 
 		return $rc;
 	}
@@ -274,9 +278,9 @@ class DiskCache implements Cache_Adapter {
 	 * @return int|false Bytes written or false if an error occurred.
 	 */
 	public function put(string $filename, $data) {
-		$scope = Tracer::start(__METHOD__);
+		$span = Tracer::start(__METHOD__);
 		$rc = $this->adapter->put(basename($filename), $data);
-		$scope->end();
+		$span->end();
 
 		return $rc;
 	}
@@ -322,7 +326,8 @@ class DiskCache implements Cache_Adapter {
 	}
 
 	public function send(string $filename) {
-		$scope = Tracer::start(__METHOD__, ['filename' => $filename]);
+		$span = Tracer::start(__METHOD__);
+		$span->setAttribute('file.name', $filename);
 
 		$filename = basename($filename);
 
@@ -330,8 +335,8 @@ class DiskCache implements Cache_Adapter {
 			header($_SERVER["SERVER_PROTOCOL"]." 404 Not Found");
 			echo "File not found.";
 
-			$scope->setAttribute('error', '404 not found');
-			$scope->end();
+			$span->setAttribute('error', '404 not found');
+			$span->end();
 			return false;
 		}
 
@@ -341,8 +346,8 @@ class DiskCache implements Cache_Adapter {
 		if (($_SERVER['HTTP_IF_MODIFIED_SINCE'] ?? '') == $gmt_modified || ($_SERVER['HTTP_IF_NONE_MATCH'] ?? '') == $file_mtime) {
 			header('HTTP/1.1 304 Not Modified');
 
-			$scope->setAttribute('error', '304 not modified');
-			$scope->end();
+			$span->setAttribute('error', '304 not modified');
+			$span->end();
 			return false;
 		}
 
@@ -361,8 +366,8 @@ class DiskCache implements Cache_Adapter {
 
 			print "Stored file has disallowed content type ($mimetype)";
 
-			$scope->setAttribute('error', '400 disallowed content type');
-			$scope->end();
+			$span->setAttribute('error', '400 disallowed content type');
+			$span->end();
 			return false;
 		}
 
@@ -384,11 +389,11 @@ class DiskCache implements Cache_Adapter {
 
 		header_remove("Pragma");
 
-		$scope->setAttribute('mimetype', $mimetype);
+		$span->setAttribute('mimetype', $mimetype);
 
 		$rc = $this->adapter->send($filename);
 
-		$scope->end();
+		$span->end();
 
 		return $rc;
 	}
@@ -419,13 +424,13 @@ class DiskCache implements Cache_Adapter {
 	// plugins work on original source URLs used before caching
 	// NOTE: URLs should be already absolutized because this is called after sanitize()
 	static public function rewrite_urls(string $str): string {
-		$scope = OpenTelemetry\API\Trace\Span::getCurrent();
-		$scope->addEvent("DiskCache::rewrite_urls");
+		$span = OpenTelemetry\API\Trace\Span::getCurrent();
+		$span->addEvent("DiskCache::rewrite_urls");
 
 		$res = trim($str);
 
 		if (!$res) {
-			$scope->end();
+			$span->end();
 			return '';
 		}
 
@@ -439,7 +444,7 @@ class DiskCache implements Cache_Adapter {
 			$need_saving = false;
 
 			foreach ($entries as $entry) {
-				$scope->addEvent("entry: " . $entry->tagName);
+				$span->addEvent("entry: " . $entry->tagName);
 
 				foreach (array('src', 'poster') as $attr) {
 					if ($entry->hasAttribute($attr)) {
diff --git a/classes/feeds.php b/classes/feeds.php
index b99be3d23..a97ac221f 100755
--- a/classes/feeds.php
+++ b/classes/feeds.php
@@ -65,7 +65,8 @@ class Feeds extends Handler_Protected {
 
 		$disable_cache = false;
 
-		$scope = Tracer::start(__METHOD__, [], func_get_args());
+		$span = Tracer::start(__METHOD__);
+		$span->setAttribute('func.args', json_encode(func_get_args()));
 
 		$reply = [];
 		$rgba_cache = [];
@@ -168,7 +169,7 @@ class Feeds extends Handler_Protected {
 		$reply['search_query'] = [$search, $search_language];
 		$reply['vfeed_group_enabled'] = $vfeed_group_enabled;
 
-		$scope->addEvent('plugin_menu_items');
+		$span->addEvent('plugin_menu_items');
 
 		$plugin_menu_items = "";
 		PluginHost::getInstance()->chain_hooks_callback(PluginHost::HOOK_HEADLINE_TOOLBAR_SELECT_MENU_ITEM2,
@@ -202,13 +203,13 @@ class Feeds extends Handler_Protected {
 					},
 					$feed, $cat_view, $qfh_ret);
 
-		$scope->addEvent('articles');
+		$span->addEvent('articles');
 
 		$headlines_count = 0;
 
 		if ($result instanceof PDOStatement) {
 			while ($line = $result->fetch(PDO::FETCH_ASSOC)) {
-				$scope->addEvent('article: ' . $line['id']);
+				$span->addEvent('article: ' . $line['id']);
 
 				++$headlines_count;
 
@@ -368,7 +369,7 @@ class Feeds extends Handler_Protected {
 			    //setting feed headline background color, needs to change text color based on dark/light
 				$fav_color = $line['favicon_avg_color'] ?? false;
 
-				$scope->addEvent("colors");
+				$span->addEvent("colors");
 
 				require_once "colors.php";
 
@@ -384,7 +385,7 @@ class Feeds extends Handler_Protected {
 				    $line['feed_bg_color'] = 'rgba(' . implode(",", $rgba_cache[$feed_id]) . ',0.3)';
 				}
 
-				$scope->addEvent("HOOK_RENDER_ARTICLE_CDM");
+				$span->addEvent("HOOK_RENDER_ARTICLE_CDM");
 
 				PluginHost::getInstance()->chain_hooks_callback(PluginHost::HOOK_RENDER_ARTICLE_CDM,
 					function ($result, $plugin) use (&$line) {
@@ -463,7 +464,7 @@ class Feeds extends Handler_Protected {
 			}
 		}
 
-		$scope->end();
+		$span->end();
 
 		return array($topmost_article_ids, $headlines_count, $feed, $disable_cache, $reply);
 	}
@@ -977,9 +978,9 @@ class Feeds extends Handler_Protected {
 	 * @throws PDOException
 	 */
 	static function _get_counters($feed, bool $is_cat = false, bool $unread_only = false, ?int $owner_uid = null): int {
-		$scope = OpenTelemetry\API\Trace\Span::getCurrent();
+		$span = OpenTelemetry\API\Trace\Span::getCurrent();
 
-		$scope->addEvent(__METHOD__ . ": $feed ($is_cat)");
+		$span->addEvent(__METHOD__ . ": $feed ($is_cat)");
 
 		$n_feed = (int) $feed;
 		$need_entries = false;
@@ -1003,14 +1004,14 @@ class Feeds extends Handler_Protected {
 			$handler = PluginHost::getInstance()->get_feed_handler($feed_id);
 			if (implements_interface($handler, 'IVirtualFeed')) {
 				/** @var IVirtualFeed $handler */
-				//$scope->end();
+				//$span->end();
 				return $handler->get_unread($feed_id);
 			} else {
-				//$scope->end();
+				//$span->end();
 				return 0;
 			}
 		} else if ($n_feed == Feeds::FEED_RECENTLY_READ) {
-			//$scope->end();
+			//$span->end();
 			return 0;
 		// tags
 		} else if ($feed != "0" && $n_feed == 0) {
@@ -1024,7 +1025,7 @@ class Feeds extends Handler_Protected {
 			$row = $sth->fetch();
 
 			// Handle 'SUM()' returning null if there are no results
-			//$scope->end();
+			//$span->end();
 			return $row["count"] ?? 0;
 
 		} else if ($n_feed == Feeds::FEED_STARRED) {
@@ -1058,7 +1059,7 @@ class Feeds extends Handler_Protected {
 
 			$label_id = Labels::feed_to_label_id($feed);
 
-			//$scope->end();
+			//$span->end();
 			return self::_get_label_unread($label_id, $owner_uid);
 		}
 
@@ -1078,7 +1079,7 @@ class Feeds extends Handler_Protected {
 			$sth->execute([$owner_uid]);
 			$row = $sth->fetch();
 
-			//$scope->end();
+			//$span->end();
 			return $row["unread"];
 
 		} else {
@@ -1091,7 +1092,7 @@ class Feeds extends Handler_Protected {
 			$sth->execute([$feed, $owner_uid]);
 			$row = $sth->fetch();
 
-			//$scope->end();
+			//$span->end();
 			return $row["unread"];
 		}
 	}
@@ -1489,7 +1490,8 @@ class Feeds extends Handler_Protected {
 	 */
 	static function _get_headlines($params): array {
 
-		$scope = Tracer::start(__METHOD__, [], func_get_args());
+		$span = Tracer::start(__METHOD__);
+		$span->setAttribute('func.args', json_encode(func_get_args()));
 
 		$pdo = Db::pdo();
 
@@ -1983,7 +1985,7 @@ class Feeds extends Handler_Protected {
 			$res = $pdo->query($query);
 		}
 
-		$scope->end();
+		$span->end();
 
 		return array($res, $feed_title, $feed_site_url, $last_error, $last_updated, $search_words, $first_id, $vfeed_query_part != "", $query_error_override);
 	}
diff --git a/classes/pluginhost.php b/classes/pluginhost.php
index c2a949f5c..7778c008f 100755
--- a/classes/pluginhost.php
+++ b/classes/pluginhost.php
@@ -339,15 +339,15 @@ class PluginHost {
 	 */
 	function chain_hooks_callback(string $hook, Closure $callback, &...$args): void {
 		$method = strtolower((string)$hook);
-		$scope = OpenTelemetry\API\Trace\Span::getCurrent();
-		$scope->addEvent("chain_hooks_callback: $hook");
+		$span = OpenTelemetry\API\Trace\Span::getCurrent();
+		$span->addEvent("chain_hooks_callback: $hook");
 
 		foreach ($this->get_hooks((string)$hook) as $plugin) {
 			//Debug::log("invoking: " . get_class($plugin) . "->$hook()", Debug::$LOG_VERBOSE);
 
-			//$p_scope = Tracer::start("$hook - " . get_class($plugin));
+			//$p_span = Tracer::start("$hook - " . get_class($plugin));
 
-			$scope->addEvent("$hook - " . get_class($plugin));
+			$span->addEvent("$hook - " . get_class($plugin));
 
 			try {
 				if ($callback($plugin->$method(...$args), $plugin))
@@ -358,10 +358,10 @@ class PluginHost {
 				user_error($err, E_USER_WARNING);
 			}
 
-			//$p_scope->end();
+			//$p_span->end();
 		}
 
-		//$scope->end();
+		//$span->end();
 	}
 
 	/**
@@ -427,6 +427,8 @@ class PluginHost {
 	 * @param PluginHost::KIND_* $kind
 	 */
 	function load_all(int $kind, int $owner_uid = null, bool $skip_init = false): void {
+		$span = Tracer::start(__METHOD__);
+		$span->setAttribute('func.args', json_encode(func_get_args()));
 
 		$plugins = [...(glob("plugins/*") ?: []), ...(glob("plugins.local/*") ?: [])];
 		$plugins = array_filter($plugins, "is_dir");
@@ -435,13 +437,16 @@ class PluginHost {
 		asort($plugins);
 
 		$this->load(join(",", $plugins), (int)$kind, $owner_uid, $skip_init);
+
+		$span->end();
 	}
 
 	/**
 	 * @param PluginHost::KIND_* $kind
 	 */
 	function load(string $classlist, int $kind, int $owner_uid = null, bool $skip_init = false): void {
-		$scope = Tracer::start(__METHOD__);
+		$span = Tracer::start(__METHOD__);
+		$span->setAttribute('func.args', json_encode(func_get_args()));
 
 		$plugins = explode(",", $classlist);
 
@@ -451,7 +456,7 @@ class PluginHost {
 			$class = trim($class);
 			$class_file = strtolower(basename(clean($class)));
 
-			$scope->addEvent("$class_file: load");
+			$span->addEvent("$class_file: load");
 
 			// try system plugin directory first
 			$file = dirname(__DIR__) . "/plugins/$class_file/init.php";
@@ -478,7 +483,7 @@ class PluginHost {
 
 					$_SESSION["safe_mode"] = 1;
 
-					$scope->setAttribute('error', 'plugin is blacklisted');
+					$span->setAttribute('error', 'plugin is blacklisted');
 					continue;
 				}
 
@@ -490,7 +495,7 @@ class PluginHost {
 				} catch (Error $err) {
 					user_error($err, E_USER_WARNING);
 
-					$scope->setAttribute('error', $err);
+					$span->setAttribute('error', $err);
 					continue;
 				}
 
@@ -501,7 +506,7 @@ class PluginHost {
 					if ($plugin_api < self::API_VERSION) {
 						user_error("Plugin $class is not compatible with current API version (need: " . self::API_VERSION . ", got: $plugin_api)", E_USER_WARNING);
 
-						$scope->setAttribute('error', 'plugin is not compatible with API version');
+						$span->setAttribute('error', 'plugin is not compatible with API version');
 						continue;
 					}
 
@@ -510,7 +515,7 @@ class PluginHost {
 						_bind_textdomain_codeset($class, "UTF-8");
 					}
 
-					$scope->addEvent("$class_file: initialize");
+					$span->addEvent("$class_file: initialize");
 
 					try {
 						switch ($kind) {
@@ -541,7 +546,7 @@ class PluginHost {
 		}
 
 		$this->load_data();
-		$scope->end();
+		$span->end();
 	}
 
 	function is_system(Plugin $plugin): bool {
@@ -634,8 +639,8 @@ class PluginHost {
 	}
 
 	private function load_data(): void {
-		$scope = OpenTelemetry\API\Trace\Span::getCurrent();
-		$scope->addEvent('load plugin data');
+		$span = OpenTelemetry\API\Trace\Span::getCurrent();
+		$span->addEvent('load plugin data');
 
 		if ($this->owner_uid && !$this->data_loaded && Config::get_schema_version() > 100)  {
 			$sth = $this->pdo->prepare("SELECT name, content FROM ttrss_plugin_storage
@@ -643,7 +648,7 @@ class PluginHost {
 			$sth->execute([$this->owner_uid]);
 
 			while ($line = $sth->fetch()) {
-				$scope->addEvent($line["name"] . ': unserialize');
+				$span->addEvent($line["name"] . ': unserialize');
 
 				$this->storage[$line["name"]] = unserialize($line["content"]);
 			}
@@ -654,8 +659,8 @@ class PluginHost {
 
 	private function save_data(string $plugin): void {
 		if ($this->owner_uid) {
-			$scope = OpenTelemetry\API\Trace\Span::getCurrent();
-			$scope->addEvent(__METHOD__ . ": $plugin");
+			$span = OpenTelemetry\API\Trace\Span::getCurrent();
+			$span->addEvent(__METHOD__ . ": $plugin");
 
 			if (!$this->pdo_data)
 				$this->pdo_data = Db::instance()->pdo_connect();
diff --git a/classes/pref/feeds.php b/classes/pref/feeds.php
index a2b55b88c..fa56f6d1a 100755
--- a/classes/pref/feeds.php
+++ b/classes/pref/feeds.php
@@ -1080,8 +1080,8 @@ class Pref_Feeds extends Handler_Protected {
 	 * @return array<string, mixed>
 	 */
 	private function feedlist_init_cat(int $cat_id): array {
-		$scope = OpenTelemetry\API\Trace\Span::getCurrent();
-		$scope->addEvent(__METHOD__ . ": $cat_id");
+		$span = OpenTelemetry\API\Trace\Span::getCurrent();
+		$span->addEvent(__METHOD__ . ": $cat_id");
 
 		return [
 			'id' => 'CAT:' . $cat_id,
@@ -1097,8 +1097,8 @@ class Pref_Feeds extends Handler_Protected {
 	 * @return array<string, mixed>
 	 */
 	private function feedlist_init_feed(int $feed_id, ?string $title = null, bool $unread = false, string $error = '', string $updated = ''): array {
-		$scope = OpenTelemetry\API\Trace\Span::getCurrent();
-		$scope->addEvent(__METHOD__ . ": $feed_id");
+		$span = OpenTelemetry\API\Trace\Span::getCurrent();
+		$span->addEvent(__METHOD__ . ": $feed_id");
 
 		if (!$title)
 			$title = Feeds::_get_title($feed_id, false);
diff --git a/classes/rpc.php b/classes/rpc.php
index 929c6bda0..092a0e25f 100755
--- a/classes/rpc.php
+++ b/classes/rpc.php
@@ -106,7 +106,7 @@ class RPC extends Handler_Protected {
 	}
 
 	function getAllCounters(): void {
-		$scope = Tracer::start(__METHOD__);
+		$span = Tracer::start(__METHOD__);
 
 		@$seq = (int) $_REQUEST['seq'];
 
@@ -134,7 +134,7 @@ class RPC extends Handler_Protected {
 			'seq' => $seq
 		];
 
-		$scope->end();
+		$span->end();
 		print json_encode($reply);
 	}
 
diff --git a/classes/rssutils.php b/classes/rssutils.php
index 29368da1c..9150fd466 100755
--- a/classes/rssutils.php
+++ b/classes/rssutils.php
@@ -69,7 +69,7 @@ class RSSUtils {
 	 * @param array<string, false|string> $options
 	 */
 	static function update_daemon_common(int $limit = 0, array $options = []): int {
-		$scope = Tracer::start(__METHOD__);
+		$span = Tracer::start(__METHOD__);
 
 		if (!$limit) $limit = Config::get(Config::DAEMON_FEED_LIMIT);
 
@@ -286,7 +286,7 @@ class RSSUtils {
 		// Send feed digests by email if needed.
 		Digest::send_headlines_digests();
 
-		$scope->end();
+		$span->end();
 
 		return $nf;
 	}
@@ -354,7 +354,9 @@ class RSSUtils {
 
 	static function update_rss_feed(int $feed, bool $no_cache = false, bool $html_output = false) : bool {
 
-		$scope = Tracer::start(__METHOD__, [], func_get_args());
+		$span = Tracer::start(__METHOD__);
+		$span->setAttribute('func.args', json_encode(func_get_args()));
+
 		Debug::enable_html($html_output);
 		Debug::log("start", Debug::LOG_VERBOSE);
 
@@ -390,19 +392,19 @@ class RSSUtils {
 			if ($user) {
 				if ($user->access_level == UserHelper::ACCESS_LEVEL_READONLY) {
 					Debug::log("error: denied update for $feed: permission denied by owner access level");
-					$scope->end();
+					$span->end();
 					return false;
 				}
 			} else {
 				// this would indicate database corruption of some kind
 				Debug::log("error: owner not found for feed: $feed");
-				$scope->end();
+				$span->end();
 				return false;
 			}
 
 		} else {
 			Debug::log("error: feeds table record not found for feed: $feed");
-			$scope->end();
+			$span->end();
 			return false;
 		}
 
@@ -561,7 +563,7 @@ class RSSUtils {
 				$feed_obj->save();
 			}
 
-			$scope->end();
+			$span->end();
 			return $error_message == "";
 		}
 
@@ -703,7 +705,7 @@ class RSSUtils {
 				]);
 
 				$feed_obj->save();
-				$scope->end();
+				$span->end();
 				return true; // no articles
 			}
 
@@ -712,7 +714,7 @@ class RSSUtils {
 			$tstart = time();
 
 			foreach ($items as $item) {
-				$a_scope = Tracer::start('article');
+				$a_span = Tracer::start('article');
 
 				$pdo->beginTransaction();
 
@@ -1305,7 +1307,7 @@ class RSSUtils {
 				Debug::log("article processed.", Debug::LOG_VERBOSE);
 
 				$pdo->commit();
-				$a_scope->end();
+				$a_span->end();
 			}
 
 			Debug::log(Debug::SEPARATOR, Debug::LOG_VERBOSE);
@@ -1346,12 +1348,12 @@ class RSSUtils {
 			unset($rss);
 
 			Debug::log("update failed.", Debug::LOG_VERBOSE);
-			$scope->end();
+			$span->end();
 			return false;
 		}
 
 		Debug::log("update done.", Debug::LOG_VERBOSE);
-		$scope->end();
+		$span->end();
 		return true;
 	}
 
@@ -1516,7 +1518,7 @@ class RSSUtils {
 	 * @return array<int, array<string, string>> An array of filter action arrays with keys "type" and "param"
 	 */
 	static function get_article_filters(array $filters, string $title, string $content, string $link, string $author, array $tags, array &$matched_rules = null, array &$matched_filters = null): array {
-		$scope = Tracer::start(__METHOD__);
+		$span = Tracer::start(__METHOD__);
 
 		$matches = array();
 
@@ -1604,7 +1606,7 @@ class RSSUtils {
 			}
 		}
 
-		$scope->end();
+		$span->end();
 
 		return $matches;
 	}
diff --git a/classes/sanitizer.php b/classes/sanitizer.php
index 68bb91b9f..a7bea9e5f 100644
--- a/classes/sanitizer.php
+++ b/classes/sanitizer.php
@@ -63,8 +63,8 @@ class Sanitizer {
 	 * @return false|string The HTML, or false if an error occurred.
 	 */
 	public static function sanitize(string $str, ?bool $force_remove_images = false, int $owner = null, string $site_url = null, array $highlight_words = null, int $article_id = null) {
-		$scope = OpenTelemetry\API\Trace\Span::getCurrent();
-		$scope->addEvent("Sanitizer::sanitize");
+		$span = OpenTelemetry\API\Trace\Span::getCurrent();
+		$span->addEvent("Sanitizer::sanitize");
 
 		if (!$owner && isset($_SESSION["uid"]))
 			$owner = $_SESSION["uid"];
diff --git a/classes/tracer.php b/classes/tracer.php
index eb0ee5eaa..e36b9f947 100644
--- a/classes/tracer.php
+++ b/classes/tracer.php
@@ -8,6 +8,11 @@ use OpenTelemetry\API\Trace\Propagation\TraceContextPropagator;
 use OpenTelemetry\API\Trace\Span;
 use OpenTelemetry\SDK\Trace\SpanExporter\InMemoryExporter;
 
+use OpenTelemetry\SDK\Resource\ResourceInfoFactory;
+use OpenTelemetry\SDK\Resource\ResourceInfo;
+use OpenTelemetry\SDK\Common\Attribute\Attributes;
+use OpenTelemetry\SemConv\ResourceAttributes;
+
 class Tracer {
 	/** @var Tracer $instance */
 	private static $instance;
@@ -25,18 +30,27 @@ class Tracer {
 			$exporter = new InMemoryExporter();
 		}
 
-		$tracerProvider =  new TracerProvider(new SimpleSpanProcessor($exporter));
+		$resource = ResourceInfoFactory::emptyResource()->merge(
+			ResourceInfo::create(Attributes::create(
+				[ResourceAttributes::SERVICE_NAME => Config::get(Config::OPENTELEMETRY_SERVICE)]
+			), ResourceAttributes::SCHEMA_URL),
+		);
+
+		$tracerProvider =  new TracerProvider(new SimpleSpanProcessor($exporter), null, $resource);
+
 		$this->tracer = $tracerProvider->getTracer('io.opentelemetry.contrib.php');
 
 		$context = TraceContextPropagator::getInstance()->extract(getallheaders());
-		$span = $this->tracer->spanBuilder(Config::get(Config::OPENTELEMETRY_SERVICE))
+		$span = $this->tracer->spanBuilder('root')
 			->setParent($context)
+			->setAttribute('http.request', json_encode($_REQUEST))
 			->startSpan();
 
-		$span->activate();
+		$scope = $span->activate();
 
-		register_shutdown_function(function() use ($span, $tracerProvider) {
+		register_shutdown_function(function() use ($span, $tracerProvider, $scope) {
 			$span->end();
+			$scope->detach();
 
 			$tracerProvider->shutdown();
 		});
@@ -44,19 +58,11 @@ class Tracer {
 
 	/**
 	 * @param string $name
-	 * @param array<string>|array<string, array<string, mixed>> $tags
-	 * @param array<string> $args
 	 * @return OpenTelemetry\API\Trace\SpanInterface
 	 */
-	private function _start(string $name, array $tags = [], array $args = []) {
+	private function _start(string $name) {
 		$span = $this->tracer->spanBuilder($name)->startSpan();
 
-		foreach ($tags as $k => $v) {
-			$span->setAttribute($k, $v);
-		}
-
-		$span->setAttribute("func.args", json_encode($args));
-
 		$span->activate();
 
 		return $span;
@@ -64,12 +70,10 @@ class Tracer {
 
 	/**
 	 * @param string $name
-	 * @param array<string>|array<string, array<string, mixed>> $tags
-	 * @param array<string> $args
 	 * @return OpenTelemetry\API\Trace\SpanInterface
 	 */
-	public static function start(string $name, array $tags = [], array $args = []) {
-		return self::get_instance()->_start($name, $tags, $args);
+	public static function start(string $name) {
+		return self::get_instance()->_start($name);
 	}
 
 	public static function get_instance() : Tracer {
diff --git a/classes/urlhelper.php b/classes/urlhelper.php
index ac585dd54..dbbde55e6 100644
--- a/classes/urlhelper.php
+++ b/classes/urlhelper.php
@@ -185,12 +185,13 @@ class UrlHelper {
 	 * @return false|string
 	 */
 	static function resolve_redirects(string $url, int $timeout, int $nest = 0) {
-		$scope = Tracer::start(__METHOD__, ['url' => $url]);
+		$span = Tracer::start(__METHOD__);
+		$span->setAttribute('func.args', json_encode(func_get_args()));
 
 		// too many redirects
 		if ($nest > 10) {
-			$scope->setAttribute('error', 'too many redirects');
-			$scope->end();
+			$span->setAttribute('error', 'too many redirects');
+			$span->end();
 			return false;
 		}
 
@@ -226,12 +227,12 @@ class UrlHelper {
 				}
 			}
 
-			$scope->end();
+			$span->end();
 			return $url;
 		}
 
-		$scope->setAttribute('error', 'request failed');
-		$scope->end();
+		$span->setAttribute('error', 'request failed');
+		$span->end();
 		// request failed?
 		return false;
 	}
@@ -279,7 +280,8 @@ class UrlHelper {
 		}
 		$url = $options["url"];
 
-		$scope = Tracer::start(__METHOD__, ['url' => $url]);
+		$span = Tracer::start(__METHOD__);
+		$span->setAttribute('func.args', json_encode(func_get_args()));
 
 		$type = isset($options["type"]) ? $options["type"] : false;
 		$login = isset($options["login"]) ? $options["login"] : false;
@@ -303,8 +305,8 @@ class UrlHelper {
 		if (!$url) {
 			self::$fetch_last_error = "Requested URL failed extended validation.";
 
-			$scope->setAttribute('error', self::$fetch_last_error);
-			$scope->end();
+			$span->setAttribute('error', self::$fetch_last_error);
+			$span->end();
 			return false;
 		}
 
@@ -314,8 +316,8 @@ class UrlHelper {
 		if (!$ip_addr || strpos($ip_addr, "127.") === 0) {
 			self::$fetch_last_error = "URL hostname failed to resolve or resolved to a loopback address ($ip_addr)";
 
-			$scope->setAttribute('error', self::$fetch_last_error);
-			$scope->end();
+			$span->setAttribute('error', self::$fetch_last_error);
+			$span->end();
 			return false;
 		}
 
@@ -327,8 +329,8 @@ class UrlHelper {
 
 			if (!$ch) {
 				self::$fetch_last_error = "curl_init() failed";
-				$scope->setAttribute('error', self::$fetch_last_error);
-				$scope->end();
+				$span->setAttribute('error', self::$fetch_last_error);
+				$span->end();
 				return false;
 			}
 
@@ -432,8 +434,8 @@ class UrlHelper {
 			if (!self::validate(self::$fetch_effective_url, true)) {
 				self::$fetch_last_error = "URL received after redirection failed extended validation.";
 
-				$scope->setAttribute('error', self::$fetch_last_error);
-				$scope->end();
+				$span->setAttribute('error', self::$fetch_last_error);
+				$span->end();
 				return false;
 			}
 
@@ -442,8 +444,8 @@ class UrlHelper {
 			if (!self::$fetch_effective_ip_addr || strpos(self::$fetch_effective_ip_addr, "127.") === 0) {
 				self::$fetch_last_error = "URL hostname received after redirection failed to resolve or resolved to a loopback address (".self::$fetch_effective_ip_addr.")";
 
-				$scope->setAttribute('error', self::$fetch_last_error);
-				$scope->end();
+				$span->setAttribute('error', self::$fetch_last_error);
+				$span->end();
 				return false;
 			}
 
@@ -460,8 +462,8 @@ class UrlHelper {
 				self::$fetch_last_error_content = $contents;
 				curl_close($ch);
 
-				$scope->setAttribute('error', self::$fetch_last_error);
-				$scope->end();
+				$span->setAttribute('error', self::$fetch_last_error);
+				$span->end();
 				return false;
 			}
 
@@ -473,8 +475,8 @@ class UrlHelper {
 				}
 				curl_close($ch);
 
-				$scope->setAttribute('error', self::$fetch_last_error);
-				$scope->end();
+				$span->setAttribute('error', self::$fetch_last_error);
+				$span->end();
 				return false;
 			}
 
@@ -488,7 +490,7 @@ class UrlHelper {
 				if ($tmp) $contents = $tmp;
 			}
 
-			$scope->end();
+			$span->end();
 
 			return $contents;
 		} else {
@@ -543,8 +545,8 @@ class UrlHelper {
 			if (!self::validate(self::$fetch_effective_url, true)) {
 				self::$fetch_last_error = "URL received after redirection failed extended validation.";
 
-				$scope->setAttribute('error', self::$fetch_last_error);
-				$scope->end();
+				$span->setAttribute('error', self::$fetch_last_error);
+				$span->end();
 				return false;
 			}
 
@@ -553,8 +555,8 @@ class UrlHelper {
 			if (!self::$fetch_effective_ip_addr || strpos(self::$fetch_effective_ip_addr, "127.") === 0) {
 				self::$fetch_last_error = "URL hostname received after redirection failed to resolve or resolved to a loopback address (".self::$fetch_effective_ip_addr.")";
 
-				$scope->setAttribute('error', self::$fetch_last_error);
-				$scope->end();
+				$span->setAttribute('error', self::$fetch_last_error);
+				$span->end();
 				return false;
 			}
 
@@ -563,8 +565,8 @@ class UrlHelper {
 			if ($data === false) {
 				self::$fetch_last_error = "'file_get_contents' failed.";
 
-				$scope->setAttribute('error', self::$fetch_last_error);
-				$scope->end();
+				$span->setAttribute('error', self::$fetch_last_error);
+				$span->end();
 				return false;
 			}
 
@@ -600,8 +602,8 @@ class UrlHelper {
 
 				self::$fetch_last_error_content = $data;
 
-				$scope->setAttribute('error', self::$fetch_last_error);
-				$scope->end();
+				$span->setAttribute('error', self::$fetch_last_error);
+				$span->end();
 				return false;
 			}
 
@@ -614,13 +616,13 @@ class UrlHelper {
 					if ($tmp) $data = $tmp;
 				}
 
-				$scope->end();
+				$span->end();
 				return $data;
 			} else {
 				self::$fetch_last_error = 'Successful response, but no content was received.';
 
-				$scope->setAttribute('error', self::$fetch_last_error);
-				$scope->end();
+				$span->setAttribute('error', self::$fetch_last_error);
+				$span->end();
 				return false;
 			}
 		}