Fix deprecated statement

Author: Ileriayo

examples/deadline/server.js

@@ -100,8 +100,11 @@ function main() {
   });
   const server = new grpc.Server();
   server.addService(echoProto.Echo.service, serviceImplementation);
-  server.bindAsync(`0.0.0.0:${argv.port}`, grpc.ServerCredentials.createInsecure(), () => {
-    server.start();
+  server.bindAsync(`0.0.0.0:${argv.port}`, grpc.ServerCredentials.createInsecure(), (err, port) => {
+    if (err != null) {
+      return console.error(err);
+    }
+    console.log(`gRPC listening on ${port}`)
   });
   client = new echoProto.Echo(`localhost:${argv.port}`, grpc.credentials.createInsecure());
 }

examples/helloworld/dynamic_codegen/greeter_server.js

@@ -44,8 +44,11 @@ function sayHello(call, callback) {
 function main() {
   var server = new grpc.Server();
   server.addService(hello_proto.Greeter.service, {sayHello: sayHello});
-  server.bindAsync('0.0.0.0:50051', grpc.ServerCredentials.createInsecure(), () => {
-    server;
+  server.bindAsync('0.0.0.0:50051', grpc.ServerCredentials.createInsecure(), (err, port) => {
+    if (err != null) {
+      return console.error(err);
+    }
+    console.log(`gRPC listening on ${port}`)
   });
 }
 

examples/helloworld/static_codegen/greeter_server.js

@@ -37,8 +37,11 @@ function sayHello(call, callback) {
 function main() {
   var server = new grpc.Server();
   server.addService(services.GreeterService, {sayHello: sayHello});
-  server.bindAsync('0.0.0.0:50051', grpc.ServerCredentials.createInsecure(), () => {
-    server.start();
+  server.bindAsync('0.0.0.0:50051', grpc.ServerCredentials.createInsecure(), (err, port) => {
+    if (err != null) {
+      return console.error(err);
+    }
+    console.log(`gRPC listening on ${port}`)
   });
 }
 

examples/metadata/server.js

@@ -148,8 +148,11 @@ function main() {
   });
   const server = new grpc.Server();
   server.addService(echoProto.Echo.service, serviceImplementation);
-  server.bindAsync(`0.0.0.0:${argv.port}`, grpc.ServerCredentials.createInsecure(), () => {
-    server.start();
+  server.bindAsync(`0.0.0.0:${argv.port}`, grpc.ServerCredentials.createInsecure(), (err, port) => {
+    if (err != null) {
+      return console.error(err);
+    }
+    console.log(`gRPC listening on ${port}`)
   });
 }