This is because all the complications associated with making a request are now abstracted from us (we will discuss this in code-generation). This is how a typical REST process looks like: The beauty of this is that the contract is kept very strict and transparent (we will discuss this later in the article). Simply put, if a function resides on a ‘server’ and in order to be invoked from the ‘client’ side, could we make it as simple as a method/function call? Essentially what an RPC does is it gives the ‘illusion’ to the client that it is invoking a local method, but in reality, it invokes a method in a remote machine that abstracts the network layer tasks. What if we can make a function call remotely? Procedure calls simply mean function/method calls it's the ‘Remote’ word that makes all the difference. We'll also compare REST with RPC and understand various aspects of gRPC, including security, tooling, and much more. In this blog post, we will understand what RPC is and the various implementations of RPC with a focus on gRPC, which is Google's implementation of RPC. That’s where Remote Procedure Calls (RPC) comes in. SOAP was bulky, and REST is a trimmed-down version, but we need an even more efficient framework. A lot of messaging protocols have been developed in the past to address this. Though we are not worried about computing resources, the latency becomes an overhead. With the increase in the size of data, we have activities like serializing, deserializing and transportation costs added to it. Everything is available within seconds, and that too on-demand. With the advent of cloud providers, we are less worried about managing data centers. It brings portability, excellent performance and a sophisticated protocol for use on the web or mobile front-end.As we progress with application development, among various things, there is one primary thing we are less worried about i.e. GRPC-Web is an excellent option for web developers. The definition of types and services in Protocol Buffer works as documentation too - whoever consumes the service gets to know what to send in the request and what can be received in the response. With a low learning curve, new developers on a gRPC project can be productive quickly. Companies like Google, Netflix and Dropbox already use it in production. GRPC is a robust architecture that has several supporters. Now you are wondering “Should I adopt gRPC?” The full source code using Golang and VueJS (Quasar Framework) can be found in my GitHub repository. I started with a simple accounts.proto definition like this: Need client libraries for Rust, Python, Java, and 4 other languages? You no longer need to write HTTP clients for all of them. Easily generate client libraries: All of your service’s client libraries can be gRPC libraries.Tighter coordination between frontend and backend teams: With the entire RPC pipeline defined using Protocol Buffers, you no longer need to have your “microservices teams” alongside your “client team.” The client-backend interaction is just one more gRPC layer amongst others.Your client can interacty directlly with one or more gRPC servers, just calling the definied functions. End-to-end gRPC: Enables you to craft your entire RPC pipeline using Protocol Buffers.This development process removes the need to manage concerns such as creating custom JSON seralization and deserialization logic, wrangling HTTP status codes, managing content type negotiation etc. GRPC-Web, just like gRPC, lets you define the service “contract” between client (web) and backend gRPC services using Protocol Buffers. You can found more details in the official gRPC documentation and my previous post Building microservices in Go and Python using gRPC. GRPC is a super-fast, super-efficient Remote Procedure Call (RPC) system that will make your microservices talk to each other. With gRPC-Web, you can now easily build truly end-to-end gRPC application architectures by defining your client and server-side data types and service interfaces with Protocol Buffers. GRPC-Web is a JavaScript client library that enables web apps to communicate directly with gRPC backend services, without requiring an HTTP server to act as an intermediary.
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