fix(example-express): update to Express v5 and fix deprecated APIs

Update dependencies to latest versions including Express v5, fix type safety issues, use resourceFromAttributes instead of deprecated Resource constructor, and improve error logging.

Author: overbalance

examples/express/package.json

@@ -31,17 +31,17 @@
     "@opentelemetry/api": "^1.9.0",
     "@opentelemetry/exporter-trace-otlp-proto": "^0.54.2",
     "@opentelemetry/instrumentation": "^0.54.2",
-    "@opentelemetry/instrumentation-express": "^0.44.0",
+    "@opentelemetry/instrumentation-express": "^0.56.0",
     "@opentelemetry/instrumentation-http": "^0.54.2",
-    "@opentelemetry/resources": "^1.27.0",
+    "@opentelemetry/resources": "^2.2.0",
     "@opentelemetry/sdk-trace-base": "^1.27.0",
     "@opentelemetry/sdk-trace-node": "^1.27.0",
     "@opentelemetry/semantic-conventions": "^1.27.0",
     "axios": "^1.6.0",
-    "express": "^4.17.1"
+    "express": "^5.1.0"
   },
   "devDependencies": {
-    "@types/express": "^4.17.13",
+    "@types/express": "^5.0.5",
     "@types/node": "18.18.14",
     "ts-node": "^10.6.0",
     "typescript": "5.0.4"

examples/express/src/client.ts

@@ -54,4 +54,4 @@ async function makeRequest() {
   );
 }
 
-makeRequest().catch(err => console.log(err));
+makeRequest().catch(err => console.error(err));

examples/express/src/server.ts

@@ -23,14 +23,15 @@ setupTracing('example-express-server');
 import * as express from 'express';
 import * as axios from 'axios';
 import { RequestHandler } from 'express';
+import type { Resource } from '@opentelemetry/resources';
 
 // Setup express
 const app = express();
 const PORT = 8080;
 
 const getCrudController = () => {
   const router = express.Router();
-  const resources: any[] = [];
+  const resources: Resource[] = [];
   router.get('/', (req, res) => res.send(resources));
   router.post('/', (req, res) => {
     resources.push(req.body);

examples/express/src/tracer.ts

@@ -14,32 +14,28 @@
  * limitations under the License.
  */
 
-import {
-  trace,
-  SamplingDecision,
-  SpanKind,
-  Attributes,
-} from '@opentelemetry/api';
+import { trace, SpanKind, Attributes } from '@opentelemetry/api';
 import { registerInstrumentations } from '@opentelemetry/instrumentation';
 import { NodeTracerProvider } from '@opentelemetry/sdk-trace-node';
 import {
   Sampler,
   AlwaysOnSampler,
   SimpleSpanProcessor,
+  SamplingDecision,
 } from '@opentelemetry/sdk-trace-base';
 import { OTLPTraceExporter } from '@opentelemetry/exporter-trace-otlp-proto';
-import { Resource } from '@opentelemetry/resources';
 import {
   ATTR_SERVICE_NAME,
   ATTR_HTTP_ROUTE,
 } from '@opentelemetry/semantic-conventions';
 import { ExpressInstrumentation } from '@opentelemetry/instrumentation-express';
 import { HttpInstrumentation } from '@opentelemetry/instrumentation-http';
+import { resourceFromAttributes } from '@opentelemetry/resources';
 
 export const setupTracing = (serviceName: string) => {
   const exporter = new OTLPTraceExporter({});
   const provider = new NodeTracerProvider({
-    resource: new Resource({
+    resource: resourceFromAttributes({
       [ATTR_SERVICE_NAME]: serviceName,
     }),
     spanProcessors: [new SimpleSpanProcessor(exporter)],