Added Invocation and PubSub examples

Author: dolencd

examples/invocation/README.md

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+# Examples - Invocation
+
+This example demonstrates how to use the Invocation API.
+
+## Run
+
+```bash
+# If it is not already, initialize DAPR on the system
+dapr init
+
+# Install dependenies
+npm install
+
+# Run the example
+npm run start:dapr-http
+```
+
+## Switching to gRPC
+
+By default the example will run using HTTP. To use gRPC, do the following:
+* Replace both occurences of `process.env.DAPR_HTTP_PORT` with `process.env.DAPR_GRPC_PORT`
+* Replace both occurences of `CommunicationProtocolEnum.HTTP` with `CommunicationProtocolEnum.GRPC`
+* Instead of `npm run start:dapr-http` run `npm run start:dapr-grpc`

examples/invocation/package.json

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+{
+  "name": "dapr-example-invocation",
+  "version": "1.0.0",
+  "description": "An example utilizing the Dapr JS SDK to invoke a service",
+  "main": "dist/index.js",
+  "private": true,
+  "scripts": {
+    "build": "rimraf ./dist && tsc",
+    "start": "npm run build && node dist/index.js",
+    "start:dev": "npm run build && nodemon --ext \".ts,.js\" --watch \"./src\" --exec \"ts-node ./src/index.ts\"",
+    "start:dapr-grpc": "dapr run --app-id example-invocation --app-port 50051 --app-protocol grpc npm run start",
+    "start:dapr-http": "dapr run --app-id example-invocation --app-port 50051 --app-protocol http npm run start"
+  },
+  "keywords": [],
+  "license": "ISC",
+  "devDependencies": {
+    "nodemon": "^2.0.7",
+    "rimraf": "^3.0.2",
+    "ts-node": "^9.1.1",
+    "typescript": "^4.2.4"
+  },
+  "dependencies": {
+    "dapr-client": "file:../../build",
+    "@types/node": "^15.3.0",
+    "google-protobuf": "^3.17.0"
+  }
+}

examples/invocation/src/index.ts

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+import { DaprServer, DaprClient, HttpMethod, CommunicationProtocolEnum } from "dapr-client";
+
+// Common settings
+const daprAppId = "example-invocation";
+const serverHost = "127.0.0.1"; // App Host of this Example Server
+const daprHost = "127.0.0.1"; 
+const serverPort = "50051"; // App Port of this Example Server
+
+async function start() {
+  // Note that the DAPR_HTTP_PORT and DAPR_GRPC_PORT environment variables are set by DAPR itself. https://docs.dapr.io/reference/environment/
+  const server = new DaprServer(
+    serverHost, 
+    serverPort, 
+    daprHost, 
+    process.env.DAPR_HTTP_PORT, 
+    CommunicationProtocolEnum.HTTP
+  );
+
+  const client = new DaprClient(
+    daprHost, 
+    process.env.DAPR_HTTP_PORT as string, 
+    CommunicationProtocolEnum.HTTP
+  );
+
+  await server.startServer();
+
+  console.log("Setting up invocation endpoints")
+  await server.invoker.listen("hello-world", async (data: any) => {
+    console.log(`Received: ${JSON.stringify(data.body)} on POST hello-world`);
+    return { hello: "world received from POST" };
+  }, { method: HttpMethod.POST });
+
+  await server.invoker.listen("hello-world", async () => {
+    console.log("Received on GET hello-world");
+    return { hello: "world received from GET" };
+  }, { method: HttpMethod.GET });
+
+  console.log("Invoking endpoints")
+  const r = await client.invoker.invoke(daprAppId, "hello-world", HttpMethod.POST, {
+    hello: "world"
+  });
+  console.log(`Response to POST request: ${JSON.stringify(r)}`);
+  const r2 = await client.invoker.invoke(daprAppId, "hello-world", HttpMethod.GET);
+  console.log(`Response to GET request: ${JSON.stringify(r2)}`);
+}
+
+start().catch((e) => {
+  console.error(e);
+  process.exit(1);
+});

examples/invocation/tsconfig.json

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+{
+  "compilerOptions": {
+    /* Visit https://aka.ms/tsconfig.json to read more about this file */
+
+    /* Basic Options */
+    // "incremental": true,                         /* Enable incremental compilation */
+    "target": "es5",                                /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', 'ES2018', 'ES2019', 'ES2020', or 'ESNEXT'. */
+    "module": "commonjs",                           /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', 'es2020', or 'ESNext'. */
+    // "lib": [],                                   /* Specify library files to be included in the compilation. */
+    // "allowJs": true,                             /* Allow javascript files to be compiled. */
+    // "checkJs": true,                             /* Report errors in .js files. */
+    // "jsx": "preserve",                           /* Specify JSX code generation: 'preserve', 'react-native', 'react', 'react-jsx' or 'react-jsxdev'. */
+    // "declaration": true,                         /* Generates corresponding '.d.ts' file. */
+    // "declarationMap": true,                      /* Generates a sourcemap for each corresponding '.d.ts' file. */
+    // "sourceMap": true,                           /* Generates corresponding '.map' file. */
+    // "outFile": "./",                             /* Concatenate and emit output to single file. */
+    "outDir": "./dist",                             /* Redirect output structure to the directory. */
+    "rootDir": "./src",                             /* Specify the root directory of input files. Use to control the output directory structure with --outDir. */
+    // "composite": true,                           /* Enable project compilation */
+    // "tsBuildInfoFile": "./",                     /* Specify file to store incremental compilation information */
+    // "removeComments": true,                      /* Do not emit comments to output. */
+    // "noEmit": true,                              /* Do not emit outputs. */
+    // "importHelpers": true,                       /* Import emit helpers from 'tslib'. */
+    // "downlevelIteration": true,                  /* Provide full support for iterables in 'for-of', spread, and destructuring when targeting 'ES5' or 'ES3'. */
+    // "isolatedModules": true,                     /* Transpile each file as a separate module (similar to 'ts.transpileModule'). */
+
+    /* Strict Type-Checking Options */
+    "strict": true,                                 /* Enable all strict type-checking options. */
+    // "noImplicitAny": true,                       /* Raise error on expressions and declarations with an implied 'any' type. */
+    // "strictNullChecks": true,                    /* Enable strict null checks. */
+    // "strictFunctionTypes": true,                 /* Enable strict checking of function types. */
+    // "strictBindCallApply": true,                 /* Enable strict 'bind', 'call', and 'apply' methods on functions. */
+    // "strictPropertyInitialization": true,        /* Enable strict checking of property initialization in classes. */
+    // "noImplicitThis": true,                      /* Raise error on 'this' expressions with an implied 'any' type. */
+    // "alwaysStrict": true,                        /* Parse in strict mode and emit "use strict" for each source file. */
+
+    /* Additional Checks */
+    // "noUnusedLocals": true,                      /* Report errors on unused locals. */
+    // "noUnusedParameters": true,                  /* Report errors on unused parameters. */
+    // "noImplicitReturns": true,                   /* Report error when not all code paths in function return a value. */
+    // "noFallthroughCasesInSwitch": true,          /* Report errors for fallthrough cases in switch statement. */
+    // "noUncheckedIndexedAccess": true,            /* Include 'undefined' in index signature results */
+    // "noPropertyAccessFromIndexSignature": true,  /* Require undeclared properties from index signatures to use element accesses. */
+
+    /* Module Resolution Options */
+    // "moduleResolution": "node",                  /* Specify module resolution strategy: 'node' (Node.js) or 'classic' (TypeScript pre-1.6). */
+    // "baseUrl": "./",                             /* Base directory to resolve non-absolute module names. */
+    // "paths": {},                                 /* A series of entries which re-map imports to lookup locations relative to the 'baseUrl'. */
+    // "rootDirs": [],                              /* List of root folders whose combined content represents the structure of the project at runtime. */
+    // "typeRoots": [],                             /* List of folders to include type definitions from. */
+    // "types": [],                                 /* Type declaration files to be included in compilation. */
+    // "allowSyntheticDefaultImports": true,        /* Allow default imports from modules with no default export. This does not affect code emit, just typechecking. */
+    "esModuleInterop": true,                        /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */
+    // "preserveSymlinks": true,                    /* Do not resolve the real path of symlinks. */
+    // "allowUmdGlobalAccess": true,                /* Allow accessing UMD globals from modules. */
+
+    /* Source Map Options */
+    // "sourceRoot": "",                            /* Specify the location where debugger should locate TypeScript files instead of source locations. */
+    // "mapRoot": "",                               /* Specify the location where debugger should locate map files instead of generated locations. */
+    // "inlineSourceMap": true,                     /* Emit a single file with source maps instead of having a separate file. */
+    // "inlineSources": true,                       /* Emit the source alongside the sourcemaps within a single file; requires '--inlineSourceMap' or '--sourceMap' to be set. */
+
+    /* Experimental Options */
+    // "experimentalDecorators": true,              /* Enables experimental support for ES7 decorators. */
+    // "emitDecoratorMetadata": true,               /* Enables experimental support for emitting type metadata for decorators. */
+
+    /* Advanced Options */
+    "skipLibCheck": true,                           /* Skip type checking of declaration files. */
+    "forceConsistentCasingInFileNames": true        /* Disallow inconsistently-cased references to the same file. */
+  }
+}

examples/pubsub/README.md

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+# Examples - PubSubs
+
+This example demonstrates how to use the PubSub API.
+
+## Run
+
+```bash
+# If it is not already, initialize DAPR on the system
+dapr init
+
+# Install dependenies
+npm install
+
+# Start a RabbitMQ Container (for the binding example part)
+# note: mgmt interface at http://localhost:15672 
+docker run -d --rm --hostname my-rabbitmq --name my-rabbitmq \
+    -e RABBITMQ_DEFAULT_USER=test-user -e RABBITMQ_DEFAULT_PASS=test-password \
+    -p 0.0.0.0:5672:5672 -p 0.0.0.0:15672:15672 \
+    rabbitmq:3-management
+
+# Run the example
+npm run start:dapr-http
+```
+
+## Switching to gRPC
+
+By default the example will run using HTTP. To use gRPC, do the following:
+* Replace both occurences of `process.env.DAPR_HTTP_PORT` with `process.env.DAPR_GRPC_PORT`
+* Replace both occurences of `CommunicationProtocolEnum.HTTP` with `CommunicationProtocolEnum.GRPC`
+* Instead of `npm run start:dapr-http` run `npm run start:dapr-grpc`

examples/pubsub/components/my-pubsub.yaml

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+apiVersion: dapr.io/v1alpha1
+kind: Component
+metadata:
+  name: my-pubsub-component
+  namespace: default
+spec:
+  type: pubsub.rabbitmq
+  version: v1
+  metadata:
+  - name: host
+    value: "amqp://test-user:test-password@localhost:5672"