Module control 

Control plane module - $init message and stdio I/O.

The control plane uses JSON over stdio for the initial handshake. After handshake, all communication happens on the data plane (pipe).

Workflow

1. Child creates pipe listener
2. Child sends $init via stdout (JSON-RPC)
3. Parent validates schema
4. Parent connects to pipe
5. Binary communication begins on data plane

Example

use procwire_client::control::{build_init_message, write_stdout_line, InitSchema, ResponseType};
use procwire_client::transport::generate_pipe_path;

// Create schema
let mut schema = InitSchema::new();
schema.add_method("echo", 1, ResponseType::Result);

// Send $init
let pipe_path = generate_pipe_path();
let init_msg = build_init_message(&pipe_path, &schema);
write_stdout_line(&init_msg)?;

Structs

EventDef

Event definition (legacy).

EventSchema

Event definition with ID.

InitMessage

The $init message (legacy struct, prefer build_init_message).

InitParams

Parameters for the $init message (legacy).

InitSchema

Schema describing available methods and events.

MethodDef

Method definition (legacy).

MethodSchema

Method definition with ID and response type.

Schema

Schema (legacy, prefer InitSchema).

Enums

ResponseType

Response type for a method.

Constants

PROTOCOL_VERSION

Protocol version string.

Functions

build_init_message

Build the $init JSON-RPC message.

write_stdout_json

Write a JSON value to stdout as a single line.

write_stdout_line

Write a line to stdout (Control Plane).