grpc fai parlare i tuoi servizi, in binario, cross-platform. Vediamo come fare parlare tra loro un servizio C# e un client Python con gRPC. Codice qui https://github.com/maurobennici/grpc-demo

1. gRPC
Fai parlare i tuoi servizi: in binario, cross-platform, cross-language, ovunque siano
Mauro Bennici - 09/06/2021

2. Mauro Bennici
.NET Foundation member, Startupper, Data Scientist, Professional Scrum Master (PSM), Microsoft Certified Trainer
(MCT), Azure Cloud Solutions Associate (MCSA). Member of the European DIGITAL SME Alliance Focus Group on
Artificial Intelligence. Mentor at Techstars.
@maurobennici
https://www.linkedin.com/in/maurobennici/
https://ghostwriter.ai

3. gRPC?
A high performance, open
source universal RPC
framework

4. Source: https://blog.oureducation.in/important-questions-on-remote-procedure-call/

5. Source: https://sagikazarmark.hu/blog/twirphp-a-modern-rpc-framework-for-php/

6. Problemi
- Piattaforma
- Compatibilità binaria
- Dati in binario
- Linguaggio di programmazione
- Sicurezza
- Latenza

7. Alternative (più o meno)
- SOAP
- CORBA
- (REST) API
- WebSocket

8. Limiti
- CORBA (enorme e complesso)
- REST API (nata NON per la velocità, non bi-direzionale)

9. Linguaggi supportati
- C#
- C++
- Dart
- Go
- Java
- Kotlin
- Node
- Objective-C
- PHP
- Python
- Ruby

10. Protocol Buffers
Source: https://developers.google.com/protocol-buffers/

11. HTTP 2
Source: https://developers.google.com/web/fundamentals/performance/http2/

12. DEMO
Passiamo alla ciccia!
Ma prima un paio di link:
https://github.com/protocolbuffers/protobuf
https://github.com/fullstorydev/grpcui

13. Quando usare cosa?
gRPC vs REST: Understanding gRPC,
OpenAPI and REST and when to use
them in API design
https://cloud.google.com/blog/products/api-management/understanding-grpc-openapi-and-rest-and-when-to-use-them

14. gRPC vs REST
- Entrambi -> HTTP 2
- Entrambi -> ProtoBuf
- Entrambi -> SSL
- Entrambi -> Interceptor (implementazione)
- gRPC -> streaming
- gRPC -> bidirezionale
- REST -> funziona su browser (gRPC nì)
- REST -> interoperabile (gRPC nì)
- gRPC -> FAST!!!!
- gRPC -> strongly typed

15. gRPC e REST
Creare gateway REST API per gRPC
https://grpc-ecosystem.github.io/grpc-gateway/
Generare sia gRPC che REST API (con tanto di Swagger) da file proto ma NON supportato
https://docs.microsoft.com/en-us/aspnet/core/grpc/httpapi?view=aspnetcore-5.0

16. Benchmarks .Net Core 3.1 v 5.0
Source: https://medium.com/swlh/working-with-grpc-in-net-b8e56404674b

17. Caso Studio
DropBox
https://dropbox.tech/infrastructure/how-we-migrated-dropbox-from-nginx-to-envoy

18. Mauro Bennici
.NET Foundation member, Startupper, Data Scientist, Professional Scrum Master (PSM), Microsoft Certified Trainer
(MCT), Azure Cloud Solutions Associate (MCSA). Member of the European DIGITAL SME Alliance Focus Group on
Artificial Intelligence. Mentor at Techstars.
@maurobennici
https://www.linkedin.com/in/maurobennici/
https://ghostwriter.ai