• 1.  API with NestJS #1. Controllers, routing and the module structure
• 2.  API with NestJS #2. Setting up a PostgreSQL database with TypeORM
• 3.  API with NestJS #3. Authenticating users with bcrypt, Passport, JWT, and cookies
• 4.  API with NestJS #4. Error handling and data validation
• 5.  API with NestJS #5. Serializing the response with interceptors
• 6.  API with NestJS #6. Looking into dependency injection and modules
• 7.  API with NestJS #7. Creating relationships with Postgres and TypeORM
• 8.  API with NestJS #8. Writing unit tests
• 9.  API with NestJS #9. Testing services and controllers with integration tests
• 10.  API with NestJS #10. Uploading public files to Amazon S3
• 11.  API with NestJS #11. Managing private files with Amazon S3
• 12.  API with NestJS #12. Introduction to Elasticsearch
• 13.  API with NestJS #13. Implementing refresh tokens using JWT
• 14.  API with NestJS #14. Improving performance of our Postgres database with indexes
• 15.  API with NestJS #15. Defining transactions with PostgreSQL and TypeORM
• 16.  API with NestJS #16. Using the array data type with PostgreSQL and TypeORM
• 17.  API with NestJS #17. Offset and keyset pagination with PostgreSQL and TypeORM
• 18.  API with NestJS #18. Exploring the idea of microservices
• 19.  API with NestJS #19. Using RabbitMQ to communicate with microservices
• 20. API with NestJS #20. Communicating with microservices using the gRPC framework
• 21.  API with NestJS #21. An introduction to CQRS
• 22.  API with NestJS #22. Storing JSON with PostgreSQL and TypeORM
• 23.  API with NestJS #23. Implementing in-memory cache to increase the performance
• 24.  API with NestJS #24. Cache with Redis. Running the app in a Node.js cluster
• 25.  API with NestJS #25. Sending scheduled emails with cron and Nodemailer
• 26.  API with NestJS #26. Real-time chat with WebSockets
• 27.  API with NestJS #27. Introduction to GraphQL. Queries, mutations, and authentication
• 28.  API with NestJS #28. Dealing in the N + 1 problem in GraphQL
• 29.  API with NestJS #29. Real-time updates with GraphQL subscriptions
• 30.  API with NestJS #30. Scalar types in GraphQL
• 31.  API with NestJS #31. Two-factor authentication

With NestJS, we have quite a few transport layer implementations prepared for microservices. Among them, the gRPC transporter is definitely one of the most interesting. In this article, we explore the idea and implement it with NestJS.

gRPC is, at its core, a Remote Procedure Call (RPC) framework. Its main idea revolves around creating services in the form of functions that we can call remotely. It’s open-source and developed by Google. The gRPC framework is language-agnostic. Therefore, we can use it for communication across microservices using multiple programming languages.

The gRPC clients can directly call a method specified on a server. To describe the interface of the service and the payload messages, we use the protocol buffers. It is an efficient binary message format. It serializes very quickly and results in small messages.

#javascript #nestjs #typescript