From 90491c11ac3ab47aaa608b5286c086f20931c7e7 Mon Sep 17 00:00:00 2001 From: Bastian Gruber Date: Fri, 12 May 2023 07:29:20 +0200 Subject: [PATCH] Add 3a: Single Node Broadcast solution --- 03a-single-node-broadcast/.gitignore | 1 + 03a-single-node-broadcast/Cargo.lock | 429 ++++++++++++++++++++++++++ 03a-single-node-broadcast/Cargo.toml | 11 + 03a-single-node-broadcast/src/main.rs | 141 +++++++++ 4 files changed, 582 insertions(+) create mode 100644 03a-single-node-broadcast/.gitignore create mode 100644 03a-single-node-broadcast/Cargo.lock create mode 100644 03a-single-node-broadcast/Cargo.toml create mode 100644 03a-single-node-broadcast/src/main.rs diff --git a/03a-single-node-broadcast/.gitignore b/03a-single-node-broadcast/.gitignore new file mode 100644 index 0000000..ea8c4bf --- /dev/null +++ b/03a-single-node-broadcast/.gitignore @@ -0,0 +1 @@ +/target diff --git a/03a-single-node-broadcast/Cargo.lock b/03a-single-node-broadcast/Cargo.lock new file mode 100644 index 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https://doc.rust-lang.org/cargo/reference/manifest.html + +[dependencies] +tokio = {version = "1", features = ["full"]} +serde = {version = "1", features = ["derive"] } +serde_json = "1" diff --git a/03a-single-node-broadcast/src/main.rs b/03a-single-node-broadcast/src/main.rs new file mode 100644 index 0000000..e8e567c --- /dev/null +++ b/03a-single-node-broadcast/src/main.rs @@ -0,0 +1,141 @@ +use serde::{Deserialize, Serialize}; +use std::io::{self, BufRead, Write}; +use std::collections::HashMap; + +#[derive(Serialize, Deserialize, Debug)] +struct Message { + src: String, + dest: String, + body: Body, +} + +#[derive(Serialize, Deserialize, Debug)] +#[serde(tag = "type")] +#[serde(rename_all = "snake_case")] +enum Body { + Error { + in_reply_to: u64, + code: u64, + text: String, + }, + Init { + msg_id: u64, + node_id: String, + node_ids: Vec, + }, + InitOk { in_reply_to: u64 }, + Broadcast { + msg_id: u64, + message: u64, + }, + BroadcastOk { + msg_id: u64, + in_reply_to: u64, + }, + Read { + msg_id: u64, + }, + ReadOk { + msg_id: u64, + in_reply_to: u64, + messages: Vec, + }, + Topology { + msg_id: u64, + topology: Topology, + }, + TopologyOk { + msg_id: u64, + in_reply_to: u64, + } +} + +#[derive(Serialize, Deserialize, Debug)] +struct Messages(Vec); + +#[derive(Serialize, Deserialize, Debug)] +struct Topology(HashMap>); + +fn main() { + let stdin = io::stdin(); + let mut stdout = io::stdout(); + let mut node_id = String::new(); + + let mut messages = Messages(Vec::new()); + + for line in stdin.lock().lines() { + let input: Message = serde_json::from_str(&line.unwrap()).unwrap(); + match input.body { + Body::Init { + msg_id, + node_id: id, + .. + } => { + node_id = id; + let output = Message { + src: node_id.clone(), + dest: input.src, + body: Body::InitOk { + in_reply_to: msg_id, + }, + }; + let output_json = serde_json::to_string(&output).unwrap(); + writeln!(stdout, "{}", output_json).unwrap(); + stdout.flush().unwrap(); + } + Body::Broadcast { msg_id, message } => { + messages.0.push(message); + + let output = Message { + src: node_id.clone(), + dest: input.src, + body: Body::BroadcastOk { + msg_id, + in_reply_to: msg_id, + }, + }; + let output_json = serde_json::to_string(&output).unwrap(); + writeln!(stdout, "{}", output_json).unwrap(); + stdout.flush().unwrap(); + } + Body::Read { msg_id } => { + let output = Message { + src: node_id.clone(), + dest: input.src, + body: Body::ReadOk { + msg_id, + in_reply_to: msg_id, + messages: messages.0.clone(), + }, + }; + let output_json = serde_json::to_string(&output).unwrap(); + writeln!(stdout, "{}", output_json).unwrap(); + stdout.flush().unwrap(); + } + Body::Topology { msg_id, .. } => { + let output = Message { + src: node_id.clone(), + dest: input.src, + body: Body::TopologyOk { + msg_id, + in_reply_to: msg_id, + }, + }; + let output_json = serde_json::to_string(&output).unwrap(); + writeln!(stdout, "{}", output_json).unwrap(); + stdout.flush().unwrap(); + } + Body::Error { + in_reply_to, + code, + text, + } => { + eprintln!( + "Error received (in_reply_to: {}, code: {}, text: {})", + in_reply_to, code, text + ); + } + _ => (), + } + } +}