add transaction name source values

Author: lobsterkatie

packages/nextjs/src/performance/client.ts

@@ -35,11 +35,16 @@ export function nextRouterInstrumentation(
     // route name. Setting the transaction name after the transaction is started could lead
     // to possible race conditions with the router, so this approach was taken.
     if (startTransactionOnPageLoad) {
-      prevTransactionName = Router.route !== null ? stripUrlQueryAndFragment(Router.route) : global.location.pathname;
+      const pathIsRoute = Router.route !== null;
+
+      prevTransactionName = pathIsRoute ? stripUrlQueryAndFragment(Router.route) : global.location.pathname;
       activeTransaction = startTransactionCb({
         name: prevTransactionName,
         op: 'pageload',
         tags: DEFAULT_TAGS,
+        metadata: {
+          source: pathIsRoute ? 'route' : 'url',
+        },
       });
     }
 
@@ -105,6 +110,7 @@ function changeStateWrapper(originalChangeStateWrapper: RouterChangeState): Wrap
         name: prevTransactionName,
         op: 'navigation',
         tags,
+        metadata: { source: 'route' },
       });
     }
     return originalChangeStateWrapper.call(this, method, url, as, options, ...args);

packages/nextjs/src/utils/instrumentServer.ts

@@ -269,7 +269,14 @@ function makeWrappedReqHandler(origReqHandler: ReqHandler): WrappedReqHandler {
             {
               name: `${namePrefix}${reqPath}`,
               op: 'http.server',
-              metadata: { requestPath: reqPath, baggage },
+              metadata: {
+                baggage,
+                requestPath: reqPath,
+                // TODO: Investigate if there's a way to tell if this is a dynamic route, so that we can make this more
+                // like `source: isDynamicRoute? 'url' : 'route'`
+                // TODO: What happens when `withSentry` is used also? Which values of `name` and `source` win?
+                source: 'url',
+              },
               ...traceparentData,
             },
             // Extra context passed to the `tracesSampler` (Note: We're combining `nextReq` and `req` this way in order
@@ -326,6 +333,7 @@ function makeWrappedMethodForGettingParameterizedPath(
     if (transaction && transaction.metadata.requestPath) {
       const origPath = transaction.metadata.requestPath;
       transaction.name = transaction.name.replace(origPath, parameterizedPath);
+      transaction.setMetadata({ source: 'route' });
     }
 
     return origMethod.call(this, parameterizedPath, ...args);

packages/nextjs/src/utils/withSentry.ts

@@ -60,7 +60,7 @@ export const withSentry = (origHandler: NextApiHandler): WrappedNextApiHandler =
           // Replace with placeholder
           if (req.query) {
             // TODO get this from next if possible, to avoid accidentally replacing non-dynamic parts of the path if
-            // they match dynamic parts
+            // they happen to match the values of any of the dynamic parts
             for (const [key, value] of Object.entries(req.query)) {
               reqPath = reqPath.replace(`${value}`, `[${key}]`);
             }
@@ -72,7 +72,7 @@ export const withSentry = (origHandler: NextApiHandler): WrappedNextApiHandler =
               name: `${reqMethod}${reqPath}`,
               op: 'http.server',
               ...traceparentData,
-              metadata: { baggage },
+              metadata: { baggage, source: 'route' },
             },
             // extra context passed to the `tracesSampler`
             { request: req },