WEBVTT 00:00.260 --> 00:00.530 All right. 00:00.530 --> 00:07.460 So next up, I'm going to show you how we can refactor our microservices instead of using TCP as our 00:07.460 --> 00:12.170 transport layer for all of our microservices, we're instead going to use gRPC. 00:12.740 --> 00:19.370 Now, if you're unfamiliar with gRPC, I'm going to provide links to both a introduction to gRPC where 00:19.370 --> 00:25.970 you can quickly read up on what gRPC is, as well as the language guide for it, where you can learn 00:25.970 --> 00:30.860 more about Proto, which is the language that runs gRPC. 00:31.100 --> 00:35.160 So I'll include links to both of these later on in the course. 00:35.180 --> 00:40.250 However, just for a brief overview, we can see a great description of what gRPC is. 00:40.250 --> 00:47.180 So we can see here that gRPC is going to allow our client applications to call methods on our server 00:47.180 --> 00:53.420 as if they were a local object, which makes it really easy for us to build distributed applications. 00:53.720 --> 01:01.140 So in gRPC we define a service, the methods that the service can be called and all of the data that 01:01.140 --> 01:02.520 is involved with those services. 01:02.520 --> 01:09.270 So the parameters, the return types, all of this is going to be defined in these proto files that 01:09.270 --> 01:10.640 we're going to build. 01:10.650 --> 01:16.740 So we can see here that regardless of the client we're using, whether it's a Ruby client, an Android 01:16.740 --> 01:21.650 client or any other client, the gRPC stub is going to be exactly the same. 01:21.660 --> 01:28.070 We're going to talk to the server as if it was a local in-memory process and get a response back. 01:28.080 --> 01:34.140 So this makes it super easy to write our code once to define what our services look like, and then 01:34.140 --> 01:38.850 any number of our clients can reuse this, which cuts down on duplication. 01:39.000 --> 01:47.190 So as I said before, gRPC runs on protocol buffers, which we are going to work on building next in 01:47.190 --> 01:49.320 our microservices. 01:49.320 --> 01:51.470 So let's go ahead and jump right in. 01:51.480 --> 01:57.060 I'll leave links to both this introduction and the language guide for protocol buffers if you'd like 01:57.060 --> 01:57.870 to learn more. 01:57.900 --> 02:03.090 Otherwise, let's jump right in and see how we can implement gRPC in our microservice.