# gRPC in Go

- Alternative to HTTP based RESTful services
- Communication patterns:
  - request and response
  - server streaming (one request and a stream of responses)
  - client streaming (stream of requests and one response)
  - bidirectional streaming (stream of requests & stream of responses)
- HTTP2 (initially "SPDY" protocol was developer by Google! around 2002-04?, they used it in Chrome and later open-sourced it)
  - SSE
  - Sticky session/connection
  - bidirectional
  - streaming
  - etc. (?? LOOK UP! ??)
- Uses Protocol Buffers for serializing payloads
  - Share the schema among the cunsumers and producers in advance
- Multi-language Support
  - JVM (Java, Kotlin)
  - Node
  - Python
  - C# / .NET
  - Dart
  - C++
  - Go
  - Ruby
  - PHP
  - Obj-C