add fern logging

.gitignore

@@ -1,6 +1,7 @@
 target/
 
 /Cargo.lock
+output.log
 
 /.idea/*
 !/.idea/runConfigurations

satrs-minisim/Cargo.toml

@@ -10,6 +10,8 @@ serde = { version = "1", features = ["derive"] }
 serde_json = "1"
 log = "0.4"
 thiserror = "1"
+fern = "0.5"
+humantime = "2"
 
 [dependencies.asynchronix]
 version = "0.2.1"

satrs-minisim/src/lib.rs

@@ -1,6 +1,8 @@
 use asynchronix::time::MonotonicTime;
 use serde::{de::DeserializeOwned, Deserialize, Serialize};
 
+pub const SIM_CTRL_UDP_PORT: u16 = 7303;
+
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Serialize, Deserialize)]
 pub enum SimTarget {
     SimCtrl,

satrs-minisim/src/main.rs

@@ -3,7 +3,7 @@ use asynchronix::simulation::{Mailbox, SimInit};
 use asynchronix::time::{MonotonicTime, SystemClock};
 use controller::SimController;
 use eps::PcduModel;
-use satrs_minisim::{SimReply, SimRequest};
+use satrs_minisim::{SimReply, SimRequest, SIM_CTRL_UDP_PORT};
 use std::sync::mpsc;
 use std::thread;
 use std::time::{Duration, SystemTime};
@@ -83,14 +83,37 @@ fn main() {
     let t0 = MonotonicTime::EPOCH;
     let mut sim_ctrl =
         create_sim_controller(ThreadingModel::Default, t0, reply_sender, request_receiver);
+    // Configure logger at runtime
+    fern::Dispatch::new()
+        // Perform allocation-free log formatting
+        .format(|out, message, record| {
+            out.finish(format_args!(
+                "[{} {} {}] {}",
+                humantime::format_rfc3339(std::time::SystemTime::now()),
+                record.level(),
+                record.target(),
+                message
+            ))
+        })
+        // Add blanket level filter -
+        .level(log::LevelFilter::Debug)
+        // - and per-module overrides
+        // Output to stdout, files, and other Dispatch configurations
+        .chain(std::io::stdout())
+        .chain(fern::log_file("output.log").expect("could not open log output file"))
+        // Apply globally
+        .apply().expect("could not apply logger configuration");
 
+    log::info!("starting simulation thread");
     // This thread schedules the simulator.
     let sim_thread = thread::spawn(move || {
         sim_ctrl.run(t0, 1);
     });
 
-    let mut udp_server = SimUdpServer::new(0, request_sender, reply_receiver, 200, None)
-        .expect("could not create UDP request server");
+    let mut udp_server =
+        SimUdpServer::new(SIM_CTRL_UDP_PORT, request_sender, reply_receiver, 200, None)
+            .expect("could not create UDP request server");
+    log::info!("starting UDP server on port {}", SIM_CTRL_UDP_PORT);
     // This thread manages the simulator UDP server.
     let udp_tc_thread = thread::spawn(move || {
         udp_server.run();