gRPC with Node.js - Speaker Deck

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gRPC with Node.js maybe it's time to put ReST to rest

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blog.lsantos.dev cloud advocate_ who am I_ ludossan@microsoft.com

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What is gRPC?

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gRPC - Developed by Google in 2015 - Uses HTTP/2 for transport - RPC stands for "remote procedure call" - Directly calls a method on the server as if it were a local object - Uses protobuf as IDL - Interoperable among languages

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RPC is NOT new

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JRMI - Java Remote Method Invocation Client Remote object Interface Stub Remote Object Implementation Remote object Interface Skeleton Client Server Implemented by the developer Implemented by JRMI

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Protocol Buﬀers protobuf for the bﬀs <3

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protobuf - OSS, Developed by Google - Mechanism for serializing structured data - Interface Deﬁnition Language - Requires compiling

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message.proto

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Compile time!

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Outﬁle

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message_pb.js

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Generated Methods

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Then we can just use

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gRPC != Protobuf

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Protobuf is universal_

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gRPC is based on services_

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Deﬁning a service

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Deﬁning a service

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Types of methods_

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Unary

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Server Streaming

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Client Streaming

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Bidirectional

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Building the server with NodeJS

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Install grpc

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One small change

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Load the protoﬁle

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Load the protoﬁle "Database"

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Implement the functions on the serverside

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Implement the functions on the serverside

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Start the server

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Full code

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Full code load

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Full code load database

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Full code load database implementation

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Full code load database implementation run

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Creating the client

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Install grpc

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Load the protoﬁle

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Add the service

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Call it!

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Full Code

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DEMO

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Problems - Docs are not very common - The initial development is more complex - Usage with TypeScript requires some work - It is a bit complicated to understand the idea and concepts

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Advantages of gRPC - Way smaller due to binary transfer - HTTP/2 by default - Simple client calls - Lighter and supports a lot of calls - Supports streaming both in client and server - Protobuf standardizes the message exchange

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Comparison

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refs_ - https://en.wikipedia.org/wiki/Remote_procedure_call - https://grpc.io/docs/what-is-grpc/introduction/ - https://developers.google.com/protocol-buﬀers - https://developers.google.com/protocol-buﬀers/docs/reference/javascript-generated - https://medium.com/xp-inc/introdu%C3%A7%C3%A3o-ao-grpc-com-node-js-98f6a4ede11 - https://grpc.io/docs/what-is-grpc/core-concepts/ - https://blog.logrocket.com/creating-a-crud-api-with-node-express-and-grpc/ - https://github.com/khaosdoctor/grpc-nodejs-demo-app

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/khaosdoctor @_staticvoid lsantos.dev /khaosdoctor thank you_