refactor(server): migrate grpc server to @grpc/grpc-js and proto-loader

Author: hivanalejandro

endpoints/getting-started-grpc/server.js

@@ -17,8 +17,17 @@
 const path = require('path');
 const PROTO_PATH = path.join(__dirname, '/protos/helloworld.proto');
 
-const grpc = require('grpc');
-const helloProto = grpc.load(PROTO_PATH).helloworld;
+const grpc = require('@grpc/grpc-js');
+const protoLoader = require('@grpc/proto-loader');
+
+const packageDefinition = protoLoader.loadSync(PROTO_PATH, {
+  keepCase: true,
+  longs: String,
+  enums: String,
+  defaults: true,
+  oneofs: true,
+});
+const helloProto = grpc.loadPackageDefinition(packageDefinition).helloworld;
 
 // Implement the SayHello RPC method.
 const sayHello = (call, callback) => {
@@ -28,9 +37,14 @@ const sayHello = (call, callback) => {
 // Start an RPC server to handle Greeter service requests
 const startServer = PORT => {
   const server = new grpc.Server();
-  server.addProtoService(helloProto.Greeter.service, {sayHello: sayHello});
-  server.bind(`0.0.0.0:${PORT}`, grpc.ServerCredentials.createInsecure());
-  server.start();
+  server.addService(helloProto.Greeter.service, {sayHello: sayHello});
+  server.bindAsync(
+    `0.0.0.0:${PORT}`,
+    grpc.ServerCredentials.createInsecure(),
+    () => {
+      server.start();
+    }
+  );
 };
 
 // The command-line program