This example demonstrates all four RPC types using a 'Route Guide' service and client.

A "route-guide" command line tool that uses generated stubs for a 'Route Guide' service allows you to start a server and to make requests against it for each of the four RPC types.

The tool uses the SwiftNIO HTTP/2 transport.

This example has an accompanying tutorial hosted on the Swift Package Index.

You must have the Protocol Buffers compiler (protoc) installed. You can find the instructions for doing this in the gRPC Swift Protobuf documentation. The swift commands below are all prefixed with PROTOC_PATH=$(which protoc), this is to let the build system know where protoc is located so that it can generate stubs for you. You can read more about it in the gRPC Swift Protobuf documentation.

Build and run the server using the CLI:

$ PROTOC_PATH=$(which protoc) swift run route-guide serve
server listening on [ipv4]127.0.0.1:31415

Use the CLI to interrogate the different RPCs you can call:

$ PROTOC_PATH=$(which protoc) swift run route-guide --help
USAGE: route-guide <subcommand>

OPTIONS:
  -h, --help              Show help information.

SUBCOMMANDS:
  serve                   Starts a route-guide server.
  get-feature             Gets a feature at a given location.
  list-features           List all features within a bounding rectangle.
  record-route            Records a route by visiting N randomly selected points and prints a summary of it.
  route-chat              Visits a few points and records a note at each, and prints all notes previously recorded at each point.

  See 'route-guide help <subcommand>' for detailed help.