diff --git a/.circleci/config.yml b/.circleci/config.yml
index 3b044134523..0dba1fdab9f 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -73,6 +73,7 @@ cache_2: &cache_2
- packages/opentelemetry-plugin-mysql/node_modules
- packages/opentelemetry-exporter-collector/node_modules
- packages/opentelemetry-plugin-xml-http-request/node_modules
+ - packages/opentelemetry-plugin-express/node_modules
node_unit_tests: &node_unit_tests
steps:
diff --git a/README.md b/README.md
index 33afe47ec56..a9fe6eb2510 100644
--- a/README.md
+++ b/README.md
@@ -128,6 +128,7 @@ OpenTelemetry can collect tracing data automatically using plugins. Vendors/User
- [@opentelemetry/plugin-redis](https://github.com/open-telemetry/opentelemetry-js/tree/master/packages/opentelemetry-plugin-redis)
- [@opentelemetry/plugin-ioredis](https://github.com/open-telemetry/opentelemetry-js/tree/master/packages/opentelemetry-plugin-ioredis)
- [@opentelemetry/plugin-dns](https://github.com/open-telemetry/opentelemetry-js/tree/master/packages/opentelemetry-plugin-dns) - By default, this plugin is not loaded [#612](https://github.com/open-telemetry/opentelemetry-js/issues/612)
+- [@opentelemetry/plugin-express](https://github.com/open-telemetry/opentelemetry-js/tree/master/packages/opentelemetry-plugin-express)
#### Web Plugins
- [@opentelemetry/plugin-document-load](https://github.com/open-telemetry/opentelemetry-js/tree/master/packages/opentelemetry-plugin-document-load)
diff --git a/packages/opentelemetry-plugin-express/.npmignore b/packages/opentelemetry-plugin-express/.npmignore
new file mode 100644
index 00000000000..9505ba9450f
--- /dev/null
+++ b/packages/opentelemetry-plugin-express/.npmignore
@@ -0,0 +1,4 @@
+/bin
+/coverage
+/doc
+/test
diff --git a/packages/opentelemetry-plugin-express/LICENSE b/packages/opentelemetry-plugin-express/LICENSE
new file mode 100644
index 00000000000..261eeb9e9f8
--- /dev/null
+++ b/packages/opentelemetry-plugin-express/LICENSE
@@ -0,0 +1,201 @@
+ Apache License
+ Version 2.0, January 2004
+ http://www.apache.org/licenses/
+
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diff --git a/packages/opentelemetry-plugin-express/README.md b/packages/opentelemetry-plugin-express/README.md
new file mode 100644
index 00000000000..b8dc226b8c4
--- /dev/null
+++ b/packages/opentelemetry-plugin-express/README.md
@@ -0,0 +1,64 @@
+# OpenTelemetry Express Instrumentation for Node.js
+[![Gitter chat][gitter-image]][gitter-url]
+[![dependencies][dependencies-image]][dependencies-url]
+[![devDependencies][devDependencies-image]][devDependencies-url]
+[![Apache License][license-image]][license-image]
+
+This module provides automatic instrumentation for [`express`](https://github.com/expressjs/express).
+
+For automatic instrumentation see the
+[@opentelemetry/node](https://github.com/open-telemetry/opentelemetry-js/tree/master/packages/opentelemetry-node) package.
+
+## Installation
+
+```bash
+npm install --save @opentelemetry/plugin-express
+```
+### Supported Versions
+ - `^4.0.0`
+
+## Usage
+
+OpenTelemetry Express Instrumentation allows the user to automatically collect trace data and export them to their backend of choice, to give observability to distributed systems.
+
+To load a specific plugin (express in this case), specify it in the Node Tracer's configuration.
+```js
+const { NodeTracerRegistry } = require('@opentelemetry/node');
+
+const registry = new NodeTracerRegistry({
+ plugins: {
+ express: {
+ enabled: true,
+ // You may use a package name or absolute path to the file.
+ path: '@opentelemetry/plugin-express',
+ }
+ }
+});
+```
+
+To load all the [supported plugins](https://github.com/open-telemetry/opentelemetry-js#plugins), use below approach. Each plugin is only loaded when the module that it patches is loaded; in other words, there is no computational overhead for listing plugins for unused modules.
+```js
+const { NodeTracerRegistry } = require('@opentelemetry/node');
+
+const registry = new NodeTracerRegistry();
+```
+
+See [examples/express](https://github.com/open-telemetry/opentelemetry-js/tree/master/examples/express) for a short example.
+
+## Useful links
+- For more information on OpenTelemetry, visit:
+- For more about OpenTelemetry JavaScript:
+- For help or feedback on this project, join us on [gitter][gitter-url]
+
+## License
+
+Apache 2.0 - See [LICENSE][license-url] for more information.
+
+[gitter-image]: https://badges.gitter.im/open-telemetry/opentelemetry-js.svg
+[gitter-url]: https://gitter.im/open-telemetry/opentelemetry-node?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge
+[license-url]: https://github.com/open-telemetry/opentelemetry-js/blob/master/LICENSE
+[license-image]: https://img.shields.io/badge/license-Apache_2.0-green.svg?style=flat
+[dependencies-image]: https://david-dm.org/open-telemetry/opentelemetry-js/status.svg?path=packages/opentelemetry-plugin-express
+[dependencies-url]: https://david-dm.org/open-telemetry/opentelemetry-js?path=packages%2Fopentelemetry-plugin-express
+[devDependencies-image]: https://david-dm.org/open-telemetry/opentelemetry-js/dev-status.svg?path=packages/opentelemetry-plugin-express
+[devDependencies-url]: https://david-dm.org/open-telemetry/opentelemetry-js?path=packages%2Fopentelemetry-plugin-express&type=dev
diff --git a/packages/opentelemetry-plugin-express/package.json b/packages/opentelemetry-plugin-express/package.json
new file mode 100644
index 00000000000..28bb6032bae
--- /dev/null
+++ b/packages/opentelemetry-plugin-express/package.json
@@ -0,0 +1,67 @@
+{
+ "name": "@opentelemetry/plugin-express",
+ "version": "0.3.2",
+ "description": "OpenTelemetry express automatic instrumentation package.",
+ "main": "build/src/index.js",
+ "types": "build/src/index.d.ts",
+ "repository": "open-telemetry/opentelemetry-js",
+ "scripts": {
+ "test": "nyc ts-mocha -p tsconfig.json 'test/**/*.ts'",
+ "codecov": "nyc report --reporter=json && codecov -f coverage/*.json -p ../../",
+ "tdd": "yarn test -- --watch-extensions ts --watch",
+ "clean": "rimraf build/*",
+ "check": "gts check",
+ "precompile": "tsc --version",
+ "version:update": "node ../../scripts/version-update.js",
+ "compile": "npm run version:update && tsc -p .",
+ "fix": "gts fix",
+ "prepare": "npm run compile"
+ },
+ "keywords": [
+ "opentelemetry",
+ "express",
+ "nodejs",
+ "tracing",
+ "profiling",
+ "plugin"
+ ],
+ "author": "OpenTelemetry Authors",
+ "license": "Apache-2.0",
+ "engines": {
+ "node": ">=8.0.0"
+ },
+ "files": [
+ "build/src/**/*.js",
+ "build/src/**/*.d.ts",
+ "doc",
+ "LICENSE",
+ "README.md"
+ ],
+ "publishConfig": {
+ "access": "public"
+ },
+ "devDependencies": {
+ "@opentelemetry/node": "^0.3.2",
+ "@opentelemetry/tracing": "^0.3.2",
+ "@types/express": "^3.2.3",
+ "@types/mocha": "^5.2.7",
+ "@types/node": "^12.7.2",
+ "@types/shimmer": "^1.0.1",
+ "codecov": "^3.6.1",
+ "express": "^4.17.1",
+ "gts": "^1.1.0",
+ "mocha": "^6.2.0",
+ "nyc": "^14.1.1",
+ "rimraf": "^3.0.0",
+ "ts-mocha": "^6.0.0",
+ "ts-node": "^8.3.0",
+ "tslint-consistent-codestyle": "^1.16.0",
+ "tslint-microsoft-contrib": "^6.2.0",
+ "typescript": "3.7.2"
+ },
+ "dependencies": {
+ "@opentelemetry/core": "^0.3.2",
+ "@opentelemetry/types": "^0.3.2",
+ "shimmer": "^1.2.1"
+ }
+}
diff --git a/packages/opentelemetry-plugin-express/src/express.ts b/packages/opentelemetry-plugin-express/src/express.ts
new file mode 100644
index 00000000000..ff829c0aacd
--- /dev/null
+++ b/packages/opentelemetry-plugin-express/src/express.ts
@@ -0,0 +1,215 @@
+/*!
+ * Copyright 2019, OpenTelemetry Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// mongodb.Server type is deprecated so every use trigger a lint error
+/* tslint:disable:deprecation */
+
+import { BasePlugin } from '@opentelemetry/core';
+import { CanonicalCode, Span, Attributes } from '@opentelemetry/types';
+import * as express from 'express';
+import * as shimmer from 'shimmer';
+import {
+ ExpressLayer,
+ ExpressRouter,
+ AttributeNames,
+ PatchedRequest,
+} from './types';
+import { VERSION } from './version';
+
+export const kPatched: unique symbol = Symbol('express-layer-patched');
+
+/** Express instrumentation plugin for OpenTelemetry */
+export class ExpressPlugin extends BasePlugin {
+ private readonly _COMPONENT = 'express';
+
+ readonly supportedVersions = ['^4.0.0'];
+
+ constructor(readonly moduleName: string) {
+ super('@opentelemetry/plugin-express', VERSION);
+ }
+
+ /**
+ * Patches Express operations.
+ */
+ protected patch() {
+ this._logger.debug('Patching Express');
+
+ if (this._moduleExports) {
+ const routerProto = (this._moduleExports
+ .Router as unknown) as express.Router;
+ const plugin = this;
+
+ this._logger.debug('patching express.Router.prototype.route');
+ shimmer.wrap(routerProto, 'route', (original: Function) => {
+ return function route_trace(
+ this: ExpressRouter,
+ arg: string | Function
+ ) {
+ const route = original.apply(this, arguments);
+ const layer = this.stack[this.stack.length - 1] as ExpressLayer;
+ plugin._applyPatch(layer, typeof arg === 'string' ? arg : undefined);
+ return route;
+ // tslint:disable-next-line:no-any
+ } as any;
+ });
+ this._logger.debug('patching express.Router.prototype.use');
+ shimmer.wrap(routerProto, 'use', (original: Function) => {
+ return function use(this: express.Application, arg: string | Function) {
+ const route = original.apply(this, arguments);
+ const layer = this.stack[this.stack.length - 1] as ExpressLayer;
+ plugin._applyPatch(layer, typeof arg === 'string' ? arg : undefined);
+ return route;
+ // tslint:disable-next-line:no-any
+ } as any;
+ });
+ this._logger.debug('patching express.Application.use');
+ shimmer.wrap(
+ this._moduleExports.application,
+ 'use',
+ (original: Function) => {
+ return function use(
+ this: { _router: ExpressRouter },
+ arg: string | Function
+ ) {
+ const route = original.apply(this, arguments);
+ const layer = this._router.stack[this._router.stack.length - 1];
+ plugin._applyPatch(
+ layer,
+ typeof arg === 'string' ? arg : undefined
+ );
+ return route;
+ // tslint:disable-next-line:no-any
+ } as any;
+ }
+ );
+ }
+
+ return this._moduleExports;
+ }
+
+ /** Unpatches all MongoDB patched functions. */
+ unpatch(): void {
+ shimmer.unwrap(this._moduleExports.Router.prototype, 'use');
+ shimmer.unwrap(this._moduleExports.Router.prototype, 'route');
+ shimmer.unwrap(this._moduleExports.application, 'use');
+ }
+
+ /**
+ * Store layers path in the request to be able to construct route later
+ * @param request The request where
+ * @param value the value to push into the array
+ */
+ private _storeLayerPath(request: PatchedRequest, value?: string) {
+ if (Array.isArray(request.__ot_middlewares) === false) {
+ Object.defineProperty(request, '__ot_middlewares', {
+ enumerable: false,
+ value: [],
+ });
+ }
+ if (value === undefined) return;
+ (request.__ot_middlewares as string[]).push(value);
+ }
+
+ /** Creates spans for Cursor operations */
+ private _applyPatch(layer: ExpressLayer, layerPath?: string) {
+ const plugin = this;
+ if (layer[kPatched] === true) return;
+ layer[kPatched] = true;
+ this._logger.debug('patching express.Router.Layer.handle');
+ shimmer.wrap(layer, 'handle', function(original: Function) {
+ if (original.length === 4) return original;
+
+ return function(
+ this: ExpressLayer,
+ req: PatchedRequest,
+ res: express.Response,
+ next: express.NextFunction
+ ) {
+ plugin._storeLayerPath(req, layerPath);
+ const route = (req.__ot_middlewares as string[]).join('');
+ const attributes: Attributes = {
+ [AttributeNames.COMPONENT]: plugin._COMPONENT,
+ [AttributeNames.HTTP_ROUTE]: route.length > 0 ? route : undefined,
+ };
+ let spanName = '';
+ if (layer.name === 'router') {
+ spanName = `express router - ${layerPath}`;
+ attributes[AttributeNames.EXPRESS_NAME] = layerPath;
+ attributes[AttributeNames.EXPRESS_TYPE] = 'router';
+ } else if (layer.name === 'bound dispatch') {
+ spanName = `express request handler`;
+ attributes[AttributeNames.EXPRESS_TYPE] = 'request_handler';
+ } else {
+ spanName = `express middleware - ${layer.name}`;
+ attributes[AttributeNames.EXPRESS_NAME] = layer.name;
+ attributes[AttributeNames.EXPRESS_TYPE] = 'middleware';
+ }
+ const span = plugin._tracer.startSpan(spanName, {
+ parent: plugin._tracer.getCurrentSpan(),
+ attributes,
+ });
+ // if we cant create a span, abort
+ if (span === null) return original.apply(this, arguments);
+ // verify we have a callback
+ let callbackIdx = Array.from(arguments).findIndex(
+ arg => typeof arg === 'function'
+ );
+ let callbackHasBeenCalled = false;
+ if (callbackIdx >= 0) {
+ arguments[callbackIdx] = function() {
+ callbackHasBeenCalled = true;
+ if (!(req.route && arguments[0] instanceof Error)) {
+ (req.__ot_middlewares as string[]).pop();
+ }
+ return plugin._patchEnd(span, plugin._tracer.bind(next))();
+ };
+ }
+ const result = original.apply(this, arguments);
+ // if the layer return a response, the callback will never
+ // be called, so we need to manually close the span
+ if (callbackHasBeenCalled === false) {
+ span.end();
+ }
+ return result;
+ };
+ });
+ }
+
+ /**
+ * Ends a created span.
+ * @param span The created span to end.
+ * @param resultHandler A callback function.
+ */
+ private _patchEnd(span: Span, resultHandler: Function): Function {
+ return function patchedEnd(this: {}, ...args: unknown[]) {
+ const error = args[0];
+ if (error instanceof Error) {
+ span.setStatus({
+ code: CanonicalCode.INTERNAL,
+ message: error.message,
+ });
+ } else {
+ span.setStatus({
+ code: CanonicalCode.OK,
+ });
+ }
+ span.end();
+ return resultHandler.apply(this, args);
+ };
+ }
+}
+
+export const plugin = new ExpressPlugin('express');
diff --git a/packages/opentelemetry-plugin-express/src/index.ts b/packages/opentelemetry-plugin-express/src/index.ts
new file mode 100644
index 00000000000..ef10dabca88
--- /dev/null
+++ b/packages/opentelemetry-plugin-express/src/index.ts
@@ -0,0 +1,17 @@
+/*!
+ * Copyright 2019, OpenTelemetry Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+export * from './express';
diff --git a/packages/opentelemetry-plugin-express/src/types.ts b/packages/opentelemetry-plugin-express/src/types.ts
new file mode 100644
index 00000000000..9fb46599bf4
--- /dev/null
+++ b/packages/opentelemetry-plugin-express/src/types.ts
@@ -0,0 +1,48 @@
+/*!
+ * Copyright 2019, OpenTelemetry Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import { kPatched } from './express';
+import { Request } from 'express';
+
+export type PatchedRequest = { ['__ot_middlewares']?: string[] } & Request;
+
+// https://github.com/expressjs/express/blob/master/lib/router/index.js#L53
+export type ExpressRouter = {
+ params: { [key: string]: string };
+ _params: string[];
+ caseSensitive: boolean;
+ mergeParams: boolean;
+ strict: boolean;
+ stack: ExpressLayer[];
+};
+
+// https://github.com/expressjs/express/blob/master/lib/router/layer.js#L33
+export type ExpressLayer = {
+ handle: Function;
+ [kPatched]?: boolean;
+ name: string;
+ params: { [key: string]: string };
+ path: string;
+ regexp: RegExp;
+};
+
+// https://github.com/open-telemetry/opentelemetry-specification/blob/master/specification/data-semantic-conventions.md#databases-client-calls
+export enum AttributeNames {
+ COMPONENT = 'component',
+ HTTP_ROUTE = 'http.route',
+ EXPRESS_TYPE = 'express.type',
+ EXPRESS_NAME = 'express.name',
+}
diff --git a/packages/opentelemetry-plugin-express/src/version.ts b/packages/opentelemetry-plugin-express/src/version.ts
new file mode 100644
index 00000000000..2efbb00dcbe
--- /dev/null
+++ b/packages/opentelemetry-plugin-express/src/version.ts
@@ -0,0 +1,18 @@
+/*!
+ * Copyright 2019, OpenTelemetry Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// this is autogenerated file, see scripts/version-update.js
+export const VERSION = '0.3.2';
diff --git a/packages/opentelemetry-plugin-express/test/express.test.ts b/packages/opentelemetry-plugin-express/test/express.test.ts
new file mode 100644
index 00000000000..d09af42c0d5
--- /dev/null
+++ b/packages/opentelemetry-plugin-express/test/express.test.ts
@@ -0,0 +1,126 @@
+/*!
+ * Copyright 2019, OpenTelemetry Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import { NodeTracerRegistry } from '@opentelemetry/node';
+import * as assert from 'assert';
+import * as express from 'express';
+import * as http from 'http';
+import { AddressInfo } from 'net';
+import { plugin } from '../src';
+import { NoopLogger } from '@opentelemetry/core';
+import {
+ InMemorySpanExporter,
+ SimpleSpanProcessor,
+} from '@opentelemetry/tracing';
+import { AttributeNames } from '../src/types';
+
+const httpRequest = {
+ get: (options: http.ClientRequestArgs | string) => {
+ return new Promise((resolve, reject) => {
+ return http.get(options, resp => {
+ let data = '';
+ resp.on('data', chunk => {
+ data += chunk;
+ });
+ resp.on('end', () => {
+ resolve(data);
+ });
+ resp.on('error', err => {
+ reject(err);
+ });
+ });
+ });
+ },
+};
+
+describe('Express Plugin', () => {
+ const logger = new NoopLogger();
+ const registry = new NodeTracerRegistry();
+ const memoryExporter = new InMemorySpanExporter();
+ const spanProcessor = new SimpleSpanProcessor(memoryExporter);
+ registry.addSpanProcessor(spanProcessor);
+ const tracer = registry.getTracer('default');
+
+ before(() => {
+ plugin.enable(express, registry, logger);
+ });
+
+ describe('Instrumenting normal get operations', () => {
+ it('should create a child span for middlewares', done => {
+ const rootSpan = tracer.startSpan('rootSpan');
+ const app = express();
+ app.use(express.json());
+ app.use(function customMiddleware(req, res, next) {
+ for (let i = 0; i < 1000; i++) {
+ continue;
+ }
+ return next();
+ });
+ const router = express.Router();
+ app.use('/toto', router);
+ router.get('/:id', (req, res, next) => {
+ return res.status(200).end();
+ });
+ const server = http.createServer(app);
+ server.listen(0, () => {
+ const port = (server.address() as AddressInfo).port;
+ assert.strictEqual(memoryExporter.getFinishedSpans().length, 0);
+ tracer.withSpan(rootSpan, async () => {
+ await httpRequest.get(`http://localhost:${port}/toto/tata`);
+ rootSpan.end();
+ assert(
+ memoryExporter
+ .getFinishedSpans()
+ .find(span => span.name.includes('customMiddleware')) !==
+ undefined
+ );
+ assert(
+ memoryExporter
+ .getFinishedSpans()
+ .find(span => span.name.includes('query')) !== undefined
+ );
+ assert(
+ memoryExporter
+ .getFinishedSpans()
+ .find(span => span.name.includes('jsonParser')) !== undefined
+ );
+ const requestHandlerSpan = memoryExporter
+ .getFinishedSpans()
+ .find(span => span.name.includes('express request handler'));
+ assert(requestHandlerSpan !== undefined);
+ assert(
+ requestHandlerSpan?.attributes[AttributeNames.COMPONENT] ===
+ 'express'
+ );
+ assert(
+ requestHandlerSpan?.attributes[AttributeNames.HTTP_ROUTE] ===
+ '/toto/:id'
+ );
+ assert(
+ requestHandlerSpan?.attributes[AttributeNames.EXPRESS_TYPE] ===
+ 'request_handler'
+ );
+ let exportedRootSpan = memoryExporter
+ .getFinishedSpans()
+ .find(span => span.name === 'rootSpan');
+ assert(exportedRootSpan !== undefined);
+ server.close();
+ return done();
+ });
+ });
+ });
+ });
+});
diff --git a/packages/opentelemetry-plugin-express/tsconfig.json b/packages/opentelemetry-plugin-express/tsconfig.json
new file mode 100644
index 00000000000..a2042cd68b1
--- /dev/null
+++ b/packages/opentelemetry-plugin-express/tsconfig.json
@@ -0,0 +1,11 @@
+{
+ "extends": "../tsconfig.base",
+ "compilerOptions": {
+ "rootDir": ".",
+ "outDir": "build"
+ },
+ "include": [
+ "src/**/*.ts",
+ "test/**/*.ts"
+ ]
+}
diff --git a/packages/opentelemetry-plugin-express/tslint.json b/packages/opentelemetry-plugin-express/tslint.json
new file mode 100644
index 00000000000..0710b135d07
--- /dev/null
+++ b/packages/opentelemetry-plugin-express/tslint.json
@@ -0,0 +1,4 @@
+{
+ "rulesDirectory": ["node_modules/tslint-microsoft-contrib"],
+ "extends": ["../../tslint.base.js", "./node_modules/tslint-consistent-codestyle"]
+}