feat!: use @grpc/grpc-js instead of grpc

README.md

@@ -15,6 +15,17 @@ Application code will rarely need to use most of the classes within this library
 $ npm install google-gax
 ```
 
+## Supporting older version of Node.js
+
+This library uses [grpc-js](https://www.npmjs.com/package/@grpc/grpc-js) package for communicating with API server, and it uses HTTP/2 functionality
+that is only available in Node.js v8.13.0 or newer. If you need to use this library with older versions of Node.js, you need to make your code depend
+on a legacy gRPC library ([grpc](https://www.npmjs.com/package/grpc)) and pass the instance of gRPC to the client constructor:
+
+```js
+const grpc = require('grpc');
+const client = new APIClient({ grpc }); // APIClient is the client class you use, e.g. SpeechClient, etc.
+```
+
 ## Contributing
 Contributions to this library are always welcome and highly encouraged.  See the [CONTRIBUTING][contributing] documentation for more information on how to get started.
 

package.json

@@ -13,8 +13,6 @@
     "@grpc/proto-loader": "^0.5.0",
     "duplexify": "^3.6.0",
     "google-auth-library": "^3.0.0",
-    "grpc": "^1.20.2",
-    "grpc-gcp": "^0.1.1",
     "is-stream-ended": "^0.1.4",
     "lodash.at": "^4.6.0",
     "lodash.has": "^4.5.2",
@@ -41,7 +39,6 @@
     "@types/through2": "^2.0.33",
     "chai": "*",
     "codecov": "^3.1.0",
-    "cross-env": "^5.2.0",
     "eslint": "^5.9.0",
     "eslint-config-prettier": "^4.0.0",
     "eslint-plugin-node": "^9.0.0",
@@ -71,7 +68,7 @@
     "docs": "compodoc src/",
     "gen-parser": "pegjs src/pathTemplateParser.pegjs",
     "pretest": "npm run prepare",
-    "test": "cross-env GOOGLE_CLOUD_USE_GRPC_JS=1 nyc mocha build/test && mocha build/test",
+    "test": "nyc mocha build/test",
     "lint": "gts check && eslint samples/*.js samples/**/*.js",
     "clean": "gts clean",
     "compile": "tsc -p . && cp src/*.json build/src && cp src/*.js build/src",

src/bundlingCalls/bundleExecutor.ts

@@ -29,7 +29,7 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-import {status} from 'grpc';
+import {status} from '@grpc/grpc-js';
 
 import {SimpleCallbackFunction} from '../apitypes';
 import {GoogleError} from '../googleError';

src/bundlingCalls/task.ts

@@ -29,7 +29,7 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-import {status} from 'grpc';
+import {status} from '@grpc/grpc-js';
 
 import {APICallback, GRPCCallResult, SimpleCallbackFunction} from '../apitypes';
 import {GoogleError} from '../googleError';

src/call.ts

@@ -29,7 +29,7 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-import {status} from 'grpc';
+import {status} from '@grpc/grpc-js';
 
 import {
   APICallback,

src/gax.ts

@@ -667,7 +667,7 @@ export function constructSettings(
   serviceName: string,
   clientConfig: ClientConfig,
   configOverrides: ClientConfig,
-  retryNames: {[index: string]: number},
+  retryNames: {},
   otherArgs?: {},
   promise?: PromiseConstructor
 ) {

src/googleError.ts

@@ -29,7 +29,7 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-import {status} from 'grpc';
+import {status} from '@grpc/grpc-js';
 
 export class GoogleError extends Error {
   code?: status;

src/grpc.ts

@@ -30,11 +30,10 @@
  *
  */
 
-import * as grpcProtoLoaderTypes from '@grpc/proto-loader'; // for types only
+import * as grpcProtoLoader from '@grpc/proto-loader';
 import * as fs from 'fs';
 import {GoogleAuth, GoogleAuthOptions} from 'google-auth-library';
-import * as grpcTypes from 'grpc'; // for types only
-import * as grpcGcp from 'grpc-gcp';
+import * as grpc from '@grpc/grpc-js';
 import {OutgoingHttpHeaders} from 'http';
 import * as path from 'path';
 import * as protobuf from 'protobufjs';
@@ -56,8 +55,6 @@ const COMMON_PROTO_FILES = walk
   .filter(f => path.extname(f) === '.proto')
   .map(f => path.normalize(f).substring(googleProtoFilesDir.length + 1));
 
-export {GrpcObject} from 'grpc';
-
 export interface GrpcClientOptions extends GoogleAuthOptions {
   auth?: GoogleAuth;
   promise?: PromiseConstructor;
@@ -76,17 +73,17 @@ export interface Metadata {
   get: (key: {}) => {};
 }
 
-export type GrpcModule = typeof grpcTypes & {
-  status: {[index: string]: number};
-};
+export type GrpcModule = typeof grpc;
 
 export interface ClientStubOptions {
   servicePath: string;
   port: number;
-  sslCreds?: grpcTypes.ChannelCredentials;
+  // TODO: use sslCreds?: grpc.ChannelCredentials;
+  // tslint:disable-next-line no-any
+  sslCreds?: any;
 }
 
-export class ClientStub extends grpcTypes.Client {
+export class ClientStub extends grpc.Client {
   [name: string]: Function;
 }
 
@@ -95,7 +92,6 @@ export class GrpcClient {
   promise: PromiseConstructor;
   grpc: GrpcModule;
   grpcVersion: string;
-  grpcProtoLoader: typeof grpcProtoLoaderTypes;
 
   /**
    * A class which keeps the context of gRPC and auth for the gRPC.
@@ -122,20 +118,16 @@ export class GrpcClient {
       this.grpc = options.grpc!;
       this.grpcVersion = '';
     } else {
-      // EXPERIMENTAL: If GOOGLE_CLOUD_USE_GRPC_JS is set, use the JS-based
-      // implementation of the gRPC client instead. Requires http2 (Node 8+).
-      if (
-        semver.gte(process.version, '8.13.0') &&
-        !!process.env.GOOGLE_CLOUD_USE_GRPC_JS
-      ) {
-        this.grpc = require('@grpc/grpc-js');
+      if (semver.gte(process.version, '8.13.0')) {
+        this.grpc = grpc;
         this.grpcVersion = require('@grpc/grpc-js/package.json').version;
       } else {
-        this.grpc = require('grpc');
-        this.grpcVersion = require('grpc/package.json').version;
+        const errorMessage =
+          'To use @grpc/grpc-js you must run your code on Node.js v8.13.0 or newer. Please see README if you need to use an older version. ' +
+          'https://github.com/googleapis/gax-nodejs/blob/master/README.md';
+        throw new Error(errorMessage);
       }
     }
-    this.grpcProtoLoader = require('@grpc/proto-loader');
   }
 
   /**
@@ -166,8 +158,8 @@ export class GrpcClient {
    * @param filename The path to the proto file.
    * @param options Options for loading the proto file.
    */
-  loadFromProto(filename: string, options: grpcProtoLoaderTypes.Options) {
-    const packageDef = grpcProtoLoaderTypes.loadSync(filename, options);
+  loadFromProto(filename: string, options: grpcProtoLoader.Options) {
+    const packageDef = grpcProtoLoader.loadSync(filename, options);
     return this.grpc.loadPackageDefinition(packageDef);
   }
 
@@ -289,20 +281,12 @@ export class GrpcClient {
   async createStub(CreateStub: typeof ClientStub, options: ClientStubOptions) {
     const serviceAddress = options.servicePath + ':' + options.port;
     const creds = await this._getCredentials(options);
-    const grpcOptions: {[index: string]: {}} = {};
+    const grpcOptions: {[index: string]: string} = {};
     Object.keys(options).forEach(key => {
-      if (key.indexOf('grpc.') === 0) {
-        grpcOptions[key] = options[key];
+      if (key.startsWith('grpc.')) {
+        grpcOptions[key.replace(/^grpc\./, '')] = options[key];
       }
     });
-    const apiConfigDefinition = options['grpc_gcp.apiConfig'];
-    if (apiConfigDefinition) {
-      const apiConfig = grpcGcp.createGcpApiConfig(apiConfigDefinition);
-      grpcOptions['channelFactoryOverride'] = grpcGcp.gcpChannelFactoryOverride;
-      grpcOptions['callInvocationTransformer'] =
-        grpcGcp.gcpCallInvocationTransformer;
-      grpcOptions['gcpApiConfig'] = apiConfig;
-    }
     const stub = new CreateStub(serviceAddress, creds, grpcOptions);
     return stub;
   }

src/index.ts

@@ -57,7 +57,6 @@ export {
   GrpcClient,
   GrpcClientOptions,
   GrpcModule,
-  GrpcObject,
   Metadata,
   MetadataValue,
 } from './grpc';

src/longRunningCalls/longrunning.ts

@@ -30,7 +30,7 @@
  */
 
 import {EventEmitter} from 'events';
-import {status} from 'grpc';
+import {status} from '@grpc/grpc-js';
 
 import {GaxCallPromise, ResultTuple} from '../apitypes';
 import {CancellablePromise} from '../call';

src/normalCalls/retries.ts

@@ -29,7 +29,7 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-import {status} from 'grpc';
+import {status} from '@grpc/grpc-js';
 
 import {
   APICallback,

system-test/fixtures/google-gax-packaging-test-app/src/index.js

@@ -15,13 +15,7 @@
 'use strict';
 
 const assert = require('assert');
-
-let grpc;
-if (process.env['GOOGLE_CLOUD_USE_GRPC_JS']) {
-  grpc = require('@grpc/grpc-js');
-} else {
-  grpc = require('grpc');
-}
+const grpc = require('@grpc/grpc-js');
 
 // Import the clients for each version supported by this package.
 const gapic = Object.freeze({