Update NestJS sample

.github/workflows/ci.yml

@@ -26,6 +26,9 @@ jobs:
             nestjs-exchange-rates,
             timer-examples
           ]
+        exclude:
+          - node: 16
+            project: nestjs-exchange-rates
 
     steps:
       - uses: actions/checkout@v4

nestjs-exchange-rates/.env.template

@@ -0,0 +1 @@
+NODE_ENV=<dev|production>

nestjs-exchange-rates/.gitignore

@@ -1,3 +1,7 @@
+/dist
+/node_modules
+.env
+
 # Created by .ignore support plugin (hsz.mobi)
 ### JetBrains template
 # Covers JetBrains IDEs: IntelliJ, RubyMine, PhpStorm, AppCode, PyCharm, CLion, Android Studio and Webstorm

nestjs-exchange-rates/README.md

@@ -11,12 +11,31 @@ This sample app is based on this [blog post about caching API requests with long
 ## Installation
 
 ```bash
-$ npm install
+npm install
 ```
 
+Create an `.env` file from the `.env.template` and chose `dev` or `production`.
+
+- `dev` must be used for testing purposes only
+- `production` must be used for production in order to have compiled workflows
+
+Note: you can't start your worker with `npm run start:worker` in production mode.
+
 ## Running the app
 
 1. `temporal server start-dev` to start [Temporal Server](https://github.com/temporalio/cli/#installation).
-1. `npm run worker` to start the Worker.
-1. `npm run start` to start the NestJS server.
-1. Visit `http://localhost:3000/exchange-rates/AUD` to see the most recent exchange rate for AUD (Australian Dollar)
+2. `npm run start:worker` to start the Worker.
+3. `npm run start:server` to start the NestJS server.
+4. Visit `http://localhost:3000/exchange-rates/AUD` to see the most recent exchange rate for AUD (Australian Dollar)
+
+## Building the app
+
+For production optimized builds, webpack is used to squash the files into a big `main.js` under the folders `dist/apps/server/` and `dist/apps/worker/`
+
+1. `npm run build:server:prod`
+2. `npm run build:worker:prod`
+
+You can locally test your builds before deploying to another server or to the cloud with:
+
+1. `npm run start:server:prod`
+2. `npm run start:worker:prod`

nestjs-exchange-rates/apps/server/src/exchange-rates/exchange-rates.providers.ts

@@ -1,7 +1,15 @@
-import { Client, WorkflowExecutionAlreadyStartedError, Connection, ConnectionOptions } from '@temporalio/client';
+import { Provider } from '@nestjs/common';
+import {
+  Client,
+  WorkflowExecutionAlreadyStartedError,
+  Connection,
+  ConnectionOptions,
+  Workflow,
+  WorkflowHandle,
+} from '@temporalio/client';
 import { taskQueue } from '@app/shared';
 
-export const exchangeRatesProviders = [
+export const exchangeRatesProviders: Provider[] = [
   {
     provide: 'CONNECTION_CONFIG',
     useValue: {
@@ -26,7 +34,7 @@ export const exchangeRatesProviders = [
   {
     provide: 'EXCHANGE_RATES_WORKFLOW_HANDLE',
     useFactory: async (client: Client) => {
-      let handle;
+      let handle: WorkflowHandle<Workflow>;
       try {
         handle = await client.workflow.start('exchangeRatesWorkflow', {
           taskQueue,
@@ -36,7 +44,7 @@ export const exchangeRatesProviders = [
       } catch (err) {
         if (err instanceof WorkflowExecutionAlreadyStartedError) {
           console.log('Reusing existing exchange rates workflow');
-          handle = await client.workflow.getHandle('exchange-rates');
+          handle = client.workflow.getHandle('exchange-rates');
         } else {
           throw err;
         }

nestjs-exchange-rates/apps/worker/scripts/build-workflow-bundle.ts

@@ -0,0 +1,21 @@
+import { bundleWorkflowCode } from '@temporalio/worker';
+import { readFile, writeFile } from 'fs/promises';
+import * as path from 'path';
+
+async function bundle() {
+  const { code } = await bundleWorkflowCode({
+    workflowsPath: require.resolve('../src/temporal/workflows'),
+  });
+  const tsconfigPath = path.join(__dirname, '../tsconfig.app.json');
+  const tsconfigData = await readFile(tsconfigPath, 'utf-8');
+  const tsconfig = JSON.parse(tsconfigData);
+  const codePath = path.join(__dirname, `../${tsconfig.compilerOptions.outDir}/workflow-bundle.js`);
+
+  await writeFile(codePath, code);
+  console.log(`Bundle written to ${codePath}`);
+}
+
+bundle().catch((err) => {
+  console.error(err);
+  process.exit(0);
+});

nestjs-exchange-rates/apps/worker/src/exchange-rates-worker/exchange-rates-worker.module.ts

@@ -1,10 +1,17 @@
-import { ActivitiesModule } from '../activities/activities.module';
 import { Module } from '@nestjs/common';
+import { ConfigModule } from '@nestjs/config';
+import { ActivitiesModule } from '../activities/activities.module';
 import { exchangeRatesWorkerProviders } from './exchange-rates-worker.providers';
 import { ExchangeRatesWorkerService } from './exchange-rates-worker.service';
 
 @Module({
-  imports: [ActivitiesModule],
+  imports: [
+    ConfigModule.forRoot({
+      envFilePath: '.env',
+      isGlobal: true,
+    }),
+    ActivitiesModule,
+  ],
   controllers: [],
   providers: [...exchangeRatesWorkerProviders, ExchangeRatesWorkerService],
 })

nestjs-exchange-rates/apps/worker/src/exchange-rates-worker/exchange-rates-worker.providers.ts

@@ -1,19 +1,29 @@
+import { ConfigService } from '@nestjs/config';
 import { ActivitiesService } from '../activities/activities.service';
 import { Worker } from '@temporalio/worker';
 import { taskQueue } from '@app/shared';
 
 export const exchangeRatesWorkerProviders = [
   {
     provide: 'EXCHANGE_RATES_WORKER',
-    inject: [ActivitiesService],
-    useFactory: async (activitiesService: ActivitiesService) => {
+    inject: [ActivitiesService, ConfigService],
+    useFactory: async (activitiesService: ActivitiesService, configService: ConfigService) => {
       const activities = {
         getExchangeRates: activitiesService.getExchangeRates.bind(activitiesService),
       };
 
+      const workflowOption =
+        configService.get<string>('NODE_ENV') === 'production'
+          ? {
+              workflowBundle: {
+                codePath: `${__dirname}/workflow-bundle.js`,
+              },
+            }
+          : { workflowsPath: require.resolve('../temporal/workflows') };
+
       const worker = await Worker.create({
-        workflowsPath: require.resolve('../temporal/workflows'),
         taskQueue,
+        ...workflowOption,
         activities,
       });
 

nestjs-exchange-rates/nest-cli.json

@@ -5,6 +5,7 @@
   "monorepo": true,
   "root": "apps/server",
   "compilerOptions": {
+    "deleteOutDir": true,
     "webpack": false,
     "tsConfigPath": "apps/server/tsconfig.app.json"
   },
@@ -37,4 +38,4 @@
       }
     }
   }
-}
+}

nestjs-exchange-rates/package.json

@@ -1,59 +1,64 @@
 {
-  "name": "nest-typescript-starter",
+  "name": "nestjs-typescript-starter",
   "private": true,
-  "version": "1.0.0",
-  "description": "Nest TypeScript starter repository",
+  "version": "2.0.0",
+  "description": "NestJS TypeScript starter repository",
   "license": "MIT",
   "scripts": {
-    "prebuild": "rimraf dist",
-    "build": "nest build",
+    "build": "npm run build:server && npm run build:worker",
+    "build:server": "nest build --webpack server",
+    "build:worker": "nest build --webpack worker && ts-node apps/worker/scripts/build-workflow-bundle.ts",
     "format": "prettier --write \"apps/**/*.ts\" \"libs/**/*.ts\"",
-    "start": "nest start server",
-    "start:dev": "nest start --watch",
-    "start:debug": "nest start --debug --watch",
-    "start:prod": "node dist/main",
+    "start:server": "nest start server",
+    "start:server:dev": "nest start --watch",
+    "start:server:debug": "nest start --debug --watch",
+    "start:server:prod": "node dist/apps/server/main",
+    "start:worker": "nest start worker",
+    "start:worker:dev": "nest start worker --watch",
+    "start:worker:debug": "nest start worker --debug --watch",
+    "start:worker:prod": "node dist/apps/worker/main",
     "test": "jest",
-    "lint": "eslint \"{src,apps,libs,test}/**/*.ts\" --fix",
-    "worker": "nest start worker"
+    "lint": "eslint \"{src,apps,libs,test}/**/*.ts\" --fix"
   },
   "dependencies": {
-    "@nestjs/axios": "0.1.0",
-    "@nestjs/common": "^8.4.7",
-    "@nestjs/core": "^8.4.7",
-    "@nestjs/platform-express": "^8.4.7",
-    "reflect-metadata": "^0.1.13",
-    "rimraf": "^3.0.2",
+    "@nestjs/axios": "3.1.2",
+    "@nestjs/common": "^10.4.8",
+    "@nestjs/config": "^3.3.0",
+    "@nestjs/core": "^10.4.8",
+    "@nestjs/platform-express": "^10.4.8",
+    "axios": "^1.3.1",
+    "reflect-metadata": "^0.2.2",
     "rxjs": "^7.4.0",
-    "@temporalio/activity": "^1.11.3",
-    "@temporalio/client": "^1.11.3",
-    "@temporalio/common": "^1.11.3",
-    "@temporalio/worker": "^1.11.3",
-    "@temporalio/workflow": "^1.11.3"
+    "@temporalio/activity": "^1.11.5",
+    "@temporalio/client": "^1.11.5",
+    "@temporalio/common": "^1.11.5",
+    "@temporalio/worker": "^1.11.5",
+    "@temporalio/workflow": "^1.11.5"
   },
   "devDependencies": {
-    "@nestjs/cli": "^8.1.3",
-    "@nestjs/schematics": "^8.0.4",
-    "@nestjs/testing": "^8.1.1",
-    "@temporalio/testing": "^1.11.3",
-    "@types/express": "^4.17.13",
-    "@types/jest": "^27.0.2",
-    "@types/node": "^16.11.1",
-    "@types/supertest": "^2.0.11",
-    "@typescript-eslint/eslint-plugin": "5.x",
-    "@typescript-eslint/parser": "5.x",
-    "eslint": "^7.32.0",
+    "@nestjs/cli": "^10.4.8",
+    "@nestjs/schematics": "^10.2.3",
+    "@nestjs/testing": "^10.4.8",
+    "@temporalio/testing": "^1.11.5",
+    "@types/express": "^5.0.0",
+    "@types/jest": "^29.5.14",
+    "@types/node": "^20.3.1",
+    "@types/supertest": "^6.0.2",
+    "@typescript-eslint/eslint-plugin": "8.15.0",
+    "@typescript-eslint/parser": "8.15.0",
+    "eslint": "^8.57.0",
     "eslint-config-prettier": "^8.3.0",
     "eslint-plugin-prettier": "^4.2.1",
-    "jest": "^27.3.0",
-    "nodemon": "^2.0.12",
+    "jest": "^29.7.0",
+    "nodemon": "^3.1.7",
     "prettier": "^2.8.8",
-    "source-map-support": "^0.5.20",
+    "source-map-support": "^0.5.21",
     "supertest": "^6.1.6",
-    "ts-jest": "^27.0.7",
-    "ts-loader": "^9.2.6",
-    "ts-node": "^10.3.0",
-    "tsconfig-paths": "^3.11.0",
-    "typescript": "^4.4.4"
+    "ts-jest": "^29.2.5",
+    "ts-loader": "^9.5.1",
+    "ts-node": "^10.9.2",
+    "tsconfig-paths": "^4.2.0",
+    "typescript": "^5.6.3"
   },
   "jest": {
     "moduleFileExtensions": [