Question 1

How to implement bidirectional streaming with gRPC Elixir?

Accepted Answer

Use GRPC.Stream.from/2 with join_with to combine input and output streams, as shown in the README's say_bid_stream_hello example, allowing composable transformations via map and other operators.

Question 2

gRPC Elixir vs grpc-go for Elixir projects?

Accepted Answer

gRPC Elixir is native to Elixir, leveraging BEAM concurrency and stream APIs, while grpc-go might offer broader language support but lacks deep Elixir integration. Choose gRPC Elixir for idiomatic Elixir code and built-in features like HTTP transcoding.

Question 3

How to handle errors in gRPC Elixir streams?

Accepted Answer

Use map_error/2 to intercept and transform errors, or rely on the unified error propagation model where exceptions are captured and can be recovered within stream pipelines, ensuring fault-tolerant communication.

Question 4

Can gRPC Elixir expose REST endpoints?

Accepted Answer

Yes, via HTTP transcoding with protobuf annotations and the http_transcode: true option in server modules, allowing gRPC services to be accessed as RESTful HTTP/JSON endpoints.

Question 5

What transports does gRPC Elixir support?

Accepted Answer

It supports DNS, IPv4/IPv6, Unix domain sockets, and xDS for service discovery, with resolvers handling endpoint refresh, as detailed in the target schemes section of the README.

Question 6

How to set up TLS with gRPC Elixir?

Accepted Answer

Configure TLS via adapter_opts in the server supervisor or client connections, with built-in support for authentication and compression, though specific certificate paths must be provided in config.

grpc-elixir

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