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How to Convert Crypto Currencies with Microservices in Node.js and GRPC

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The workshop overviews key architecture principles, design patterns, and technologies used to build microservices in the Node.js stack. It covers the theory of the GRPC framework and protocol buffers mechanism, as well as techniques and specifics of building isolated services using the monorepo approach with lerna and yarn workspaces, TypeScript. The workshop includes a live practical assignment to create a currency converter application that follows microservices paradigms. The "Microservices in Node.js with GRPC" workshop fits the best developers who want to learn and practice GRPC microservices pattern with the Node.js platform.

This workshop has been presented at Node Congress 2022, check out the latest edition of this JavaScript Conference.

FAQ

gRPC is a modern, open source, high-performance remote procedure call (RPC) framework that can run anywhere. It enables client and server applications to communicate transparently, and makes it easier to build connected systems.

Key features of gRPC include its support for multiple languages, efficient connection over HTTP/2, streaming with client, server, and bi-directional streaming, and pluggability, allowing custom extensions and changes to core functionality.

Protocol Buffers (Protobuf) are a language-neutral, platform-neutral, extensible mechanism for serializing structured data, similar to XML but smaller, faster, and simpler. In gRPC, Protobuf is used for defining the structure of the data being exchanged and the service methods available.

gRPC uses Protocol Buffers which enforce a structured and typed format for any data exchanged over gRPC. This ensures type safety as the data conforms to a predefined schema, reducing errors and improving code quality.

A gRPC server implements the server-side logic of the services defined in the Protobuf files. It listens for requests from clients, processes them as per the business logic, and sends back responses. The server is capable of handling streaming data and can communicate over various protocols supported by gRPC.

A basic gRPC application consists of a server that implements the service interfaces defined in Protobuf and clients that call methods provided by the server. Both the server and clients utilize stubs generated from Protobuf definitions to handle serialization and communication.

gRPC supports several programming languages including but not limited to C++, Java, Python, Go, Ruby, C#, Node.js, and PHP. This wide range of supported languages makes gRPC versatile for different application environments.

gRPC supports four types of streaming: client-side streaming, server-side streaming, bidirectional streaming, and no streaming. This allows messages to be streamed in one or both directions, enabling real-time communication and efficient handling of large data sets.

node.js microservices

Alex Korzhikov

Andrew Reddikh

162 min

19 Feb, 2022

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Video Summary and Transcription

Today's workshop is divided into three parts: an introduction to gRPC and Node.js, practical examples of implementing a currency converter, and a hands-on practice session. The workshop covers the history and key features of gRPC, the concept of Remote Procedure Calls (RPC), gRPC communication and service definitions, gRPC extension points and protocol buffers, and the use of protocol buffers in TypeScript. It also includes demos on protocol buffer transformation, using gRPC.js and Proto Loader, starting the gRPC server, implementing the server and client, and using gRPC in JavaScript. The workshop concludes with discussions on using TypeScript and the protocol.gmtc file, preparing the environment and monorepo structure, creating a currency converter with providers, and the benefits of gRPC compared to REST, RPC, and GraphQL.

Available in Español: Cómo Convertir Criptomonedas con Microservicios en Node.js y gRPC

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