Add config and basic architecture for QUIC

substrate/src/config.rs

@@ -0,0 +1,49 @@
+use bevy::prelude::Resource;
+use figment::Figment;
+use figment::providers::{Env, Format, Serialized, Toml};
+use serde::{Deserialize, Serialize};
+
+#[derive(Debug, Resource, Serialize, Deserialize)]
+pub struct AppConfig {
+    pub network: QuicConfig,
+    pub simulation: SimulationConfig,
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct SimulationConfig {
+    pub tick_rate_hz: u32,
+    pub max_entities: usize,
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct QuicConfig {
+    pub server_port: u16,
+    pub server_interface: String,
+    pub server_cert: String,
+}
+
+impl Default for AppConfig {
+    fn default() -> Self {
+        Self {
+            network : QuicConfig {
+                server_port: 9000,
+                server_interface: "0.0.0.0".to_string(),
+                server_cert: "cert.pem".to_string(),
+            },
+            simulation: SimulationConfig {
+                tick_rate_hz: 60,
+                max_entities: 10000,
+            },
+        }
+    }
+}
+
+impl AppConfig {
+    pub fn load(config_file: &str) -> Result<Self, figment::Error> {
+        Figment::new()
+            .merge(Serialized::defaults(Self::default()))  // compiled-in defaults
+            .merge(Toml::file(config_file))                // config file
+            .merge(Env::prefixed("APP_"))            // env overrides, e.g. APP_NETWORK__PORT=9000
+            .extract()
+    }
+}

substrate/src/main.rs

@@ -1,3 +1,17 @@
+mod transport;
+mod config;
+
+use std::sync::Arc;
+use bevy::prelude::*;
+use crate::config::AppConfig;
+
 fn main() {
-    println!("Hello, world!");
-}
+    let config = AppConfig::load("config.toml").expect("Failed to load config");
+    println!("{:?}", config);
+
+    App::new()
+        .insert_resource(config)
+        .add_plugins(MinimalPlugins)
+        .add_plugins(transport::ecs::EcsQuicTransportPlugin{})
+        .run();
+}

substrate/src/transport/ecs.rs

@@ -0,0 +1,69 @@
+use std::sync::{Arc, Mutex};
+use bevy::prelude::*;
+use tokio::sync::mpsc;
+use crate::config::QuicConfig;
+use crate::transport::QuicMessage;
+use crate::transport::server::run_substrate_server;
+
+const T1_CAPACITY: usize = 1024;
+const T2_CAPACITY: usize = 512;
+const T3_CAPACITY: usize = 256;
+
+pub struct EcsQuicTransportPlugin{}
+
+#[derive(Resource)]
+struct BridgeReceivers {
+    t1: Mutex<mpsc::Receiver<QuicMessage>>,
+    t2: Mutex<mpsc::Receiver<QuicMessage>>,
+    t3: Mutex<mpsc::Receiver<QuicMessage>>,
+}
+
+fn ingest_system(bridge: Res<BridgeReceivers>){
+    let mut t1 = bridge.t1.lock().unwrap();
+    // Tier 1: drain up to N messages, drop the rest
+    for _ in 0..T1_CAPACITY {
+        match t1.try_recv() {
+            Ok(msg) => { /* write RawSensorData */ }
+            Err(_) => break,
+        }
+    }
+
+    // T2/T3: drain completely, these are low volume
+    let mut t2 = bridge.t2.lock().unwrap();
+    while let Ok(msg) = t2.try_recv() { /* ... */ }
+
+    let mut t3 = bridge.t3.lock().unwrap();
+    while let Ok(msg) = t3.try_recv() { /* ... */ }
+}
+
+impl Plugin for EcsQuicTransportPlugin{
+    fn build(&self, app: &mut App) {
+        // Create the channels for multi-thread communication
+        let (t1_tx, t1_rx) =
+            mpsc::channel::<QuicMessage>(T1_CAPACITY);
+        let (t2_tx, t2_rx) =
+            mpsc::channel::<QuicMessage>(T2_CAPACITY);
+        let (t3_tx, t3_rx) =
+            mpsc::channel::<QuicMessage>(T3_CAPACITY);
+
+        let quic_handle = std::thread::spawn(move || {
+            let rt = tokio::runtime::Builder::new_multi_thread()
+                .worker_threads(2)
+                .enable_all()
+                .build()
+                .unwrap();
+
+            rt.block_on(async move {
+                run_substrate_server(t1_tx, t2_tx, t3_tx).await;
+            });
+        });
+
+        app.insert_resource(BridgeReceivers {
+            t1: Mutex::new(t1_rx),
+            t2: Mutex::new(t2_rx),
+            t3: Mutex::new(t3_rx),
+        });
+
+        app.add_systems(PreUpdate, ingest_system);
+    }
+}

substrate/src/transport/mod.rs

@@ -0,0 +1,11 @@
+pub mod ecs;
+mod server;
+
+#[derive(Debug, Clone, Default, Copy, PartialEq)]
+pub struct QuicMessage{
+    pub device_id: uuid::Uuid,
+    pub data_stream_id: u16,
+    pub raw_value: f64,
+    pub timestamp_us: u64,
+    pub sequence_number: u32,
+}

substrate/src/transport/server.rs

@@ -0,0 +1,8 @@
+use tokio::sync::mpsc::Sender;
+use crate::transport::QuicMessage;
+
+pub async fn run_substrate_server(t1_tx: Sender<QuicMessage>,
+                        t2_tx: Sender<QuicMessage>,
+                        t3_tx: Sender<QuicMessage>) {
+    
+}