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#[macro_use]
extern crate anyhow;
#[macro_use]
extern crate log;
use std::collections::{BTreeMap, BTreeSet, HashMap};
use std::sync::RwLock;
use anyhow::Result;
use hyper::{Body, Request, Response, Server, StatusCode};
use rand::SeedableRng;
use rand_xorshift::XorShiftRng;
use serde::{Deserialize, Serialize};
use structopt::StructOpt;
use abstio::MapName;
use abstutil::{serialize_btreemap, Timer};
use geom::{Distance, Duration, FindClosest, LonLat, Time};
use map_model::{
CompressedMovementID, ControlTrafficSignal, EditCmd, EditIntersection, IntersectionID, Map,
MovementID, PermanentMapEdits, RoadID, TurnID,
};
use sim::{
AgentID, AgentType, DelayCause, PersonID, Sim, SimFlags, SimOptions, TripID, VehicleType,
};
use synthpop::{ExternalPerson, Scenario, ScenarioModifier, TripMode};
lazy_static::lazy_static! {
static ref MAP: RwLock<Map> = RwLock::new(Map::blank());
static ref SIM: RwLock<Sim> = RwLock::new(Sim::new(&Map::blank(), SimOptions::new("tmp")));
static ref LOAD: RwLock<LoadSim> = RwLock::new({
LoadSim {
scenario: abstio::path_scenario(&MapName::seattle("montlake"), "weekday"),
modifiers: Vec::new(),
edits: None,
rng_seed: SimFlags::RNG_SEED,
opts: SimOptions::default(),
}
});
}
#[derive(StructOpt)]
#[structopt(
name = "headless",
about = "Simulate traffic with a JSON API, not a GUI"
)]
struct Args {
#[structopt(long)]
port: u16,
#[structopt(long, default_value = "42")]
rng_seed: u64,
#[structopt(flatten)]
opts: SimOptions,
}
#[tokio::main]
async fn main() {
abstutil::logger::setup();
let args = Args::from_args();
{
let mut load = LOAD.write().unwrap();
load.rng_seed = args.rng_seed;
load.opts = args.opts;
let (map, sim) = load.setup(&mut Timer::new("setup headless"));
*MAP.write().unwrap() = map;
*SIM.write().unwrap() = sim;
}
let addr = std::net::SocketAddr::from(([127, 0, 0, 1], args.port));
info!("Listening on http://{}", addr);
let serve_future = Server::bind(&addr).serve(hyper::service::make_service_fn(|_| async {
Ok::<_, hyper::Error>(hyper::service::service_fn(serve_req))
}));
if let Err(err) = serve_future.await {
panic!("Server error: {}", err);
}
}
async fn serve_req(req: Request<Body>) -> Result<Response<Body>, hyper::Error> {
let path = req.uri().path().to_string();
let params: HashMap<String, String> =
url::Url::parse(&format!("http://localhost{}", req.uri()))
.unwrap()
.query_pairs()
.map(|(k, v)| (k.to_string(), v.to_string()))
.collect();
let body = hyper::body::to_bytes(req).await?.to_vec();
info!("Handling {}", path);
Ok(
match handle_command(
&path,
¶ms,
&body,
&mut SIM.write().unwrap(),
&mut MAP.write().unwrap(),
&mut LOAD.write().unwrap(),
) {
Ok(resp) => Response::new(Body::from(resp)),
Err(err) => {
error!("{}: {}", path, err);
Response::builder()
.status(StatusCode::BAD_REQUEST)
.body(Body::from(format!("Bad command {}: {}", path, err)))
.unwrap()
}
},
)
}
fn handle_command(
path: &str,
params: &HashMap<String, String>,
body: &[u8],
sim: &mut Sim,
map: &mut Map,
load: &mut LoadSim,
) -> Result<String> {
let get = |key: &str| {
params
.get(key)
.ok_or_else(|| anyhow!("missing GET parameter {}", key))
};
match path {
"/sim/reset" => {
let (new_map, new_sim) = load.setup(&mut Timer::new("reset sim"));
*map = new_map;
*sim = new_sim;
Ok("sim reloaded".to_string())
}
"/sim/load" => {
let args: LoadSim = abstutil::from_json(body)?;
load.scenario = args.scenario;
load.modifiers = args.modifiers;
load.edits = args.edits;
let (new_map, new_sim) = load.setup(&mut Timer::new("reset sim"));
*map = new_map;
*sim = new_sim;
Ok("flags changed and sim reloaded".to_string())
}
"/sim/load-blank" => {
*map =
Map::load_synchronously(get("map")?.to_string(), &mut Timer::new("load new map"));
*sim = Sim::new(&map, SimOptions::default());
Ok("map changed, blank simulation".to_string())
}
"/sim/get-time" => Ok(sim.time().to_string()),
"/sim/goto-time" => {
let t = Time::parse(get("t")?)?;
if t <= sim.time() {
bail!("{} is in the past. call /sim/reset first?", t)
} else {
let dt = t - sim.time();
sim.timed_step(map, dt, &mut None, &mut Timer::new("goto-time"));
Ok(format!("it's now {}", t))
}
}
"/sim/new-person" => {
let input: ExternalPerson = abstutil::from_json(body)?;
for trip in &input.trips {
if trip.departure < sim.time() {
bail!(
"It's {} now, so you can't start a trip at {}",
sim.time(),
trip.departure
)
}
}
let mut scenario = Scenario::empty(map, "one-shot");
scenario.people = ExternalPerson::import(map, vec![input], false)?;
let mut rng = XorShiftRng::seed_from_u64(load.rng_seed);
sim.instantiate(&scenario, map, &mut rng, &mut Timer::throwaway());
Ok(format!(
"{} created",
sim.get_all_people().last().unwrap().id
))
}
"/traffic-signals/get" => {
let i = IntersectionID(get("id")?.parse::<usize>()?);
if let Some(ts) = map.maybe_get_traffic_signal(i) {
Ok(abstutil::to_json(ts))
} else {
bail!("{} isn't a traffic signal", i)
}
}
"/traffic-signals/set" => {
let ts: ControlTrafficSignal = abstutil::from_json(body)?;
let id = ts.id;
let mut edits = map.get_edits().clone();
edits.commands.push(EditCmd::ChangeIntersection {
i: id,
old: map.get_i_edit(id),
new: EditIntersection::TrafficSignal(ts.export(map)),
});
map.must_apply_edits(edits, &mut Timer::throwaway());
map.recalculate_pathfinding_after_edits(&mut Timer::throwaway());
Ok(format!("{} has been updated", id))
}
"/traffic-signals/get-delays" => {
let i = map.get_i(IntersectionID(get("id")?.parse::<usize>()?));
let t1 = Time::parse(get("t1")?)?;
let t2 = Time::parse(get("t2")?)?;
if !i.is_traffic_signal() {
bail!("{} isn't a traffic signal", i.id);
}
let movements: Vec<&MovementID> = i.movements.keys().collect();
let mut delays = Delays {
per_direction: BTreeMap::new(),
};
for m in i.movements.keys() {
delays.per_direction.insert(*m, Vec::new());
}
if let Some(list) = sim.get_analytics().intersection_delays.get(&i.id) {
for (idx, t, dt, _) in list {
if *t >= t1 && *t <= t2 {
delays
.per_direction
.get_mut(movements[*idx as usize])
.unwrap()
.push(*dt);
}
}
}
Ok(abstutil::to_json(&delays))
}
"/traffic-signals/get-cumulative-thruput" => {
let i = map.get_i(IntersectionID(get("id")?.parse::<usize>()?));
if !i.is_traffic_signal() {
bail!("{} isn't a traffic signal", i.id);
}
let mut thruput = Throughput {
per_direction: BTreeMap::new(),
};
for (idx, m) in i.movements.keys().enumerate() {
thruput.per_direction.insert(
*m,
sim.get_analytics()
.traffic_signal_thruput
.total_for(CompressedMovementID {
i: i.id,
idx: u8::try_from(idx).unwrap(),
}),
);
}
Ok(abstutil::to_json(&thruput))
}
"/traffic-signals/get-all-current-state" => {
let mut all_state = BTreeMap::new();
for i in map.all_intersections() {
if !i.is_traffic_signal() {
continue;
}
let (current_stage_idx, remaining_time) =
sim.current_stage_and_remaining_time(i.id);
all_state.insert(
i.id,
TrafficSignalState {
current_stage_idx,
remaining_time,
accepted: sim
.get_accepted_agents(i.id)
.into_iter()
.map(|(a, _)| a)
.collect(),
waiting: sim.get_waiting_agents(i.id),
},
);
}
Ok(abstutil::to_json(&all_state))
}
"/data/get-finished-trips" => {
let mut trips = Vec::new();
for (_, id, mode, maybe_duration) in &sim.get_analytics().finished_trips {
let distance_crossed = if maybe_duration.is_some() {
sim.finished_trip_details(*id).unwrap().2
} else {
Distance::ZERO
};
trips.push(FinishedTrip {
id: *id,
person: sim.trip_to_person(*id).unwrap(),
duration: *maybe_duration,
distance_crossed,
mode: *mode,
});
}
Ok(abstutil::to_json(&trips))
}
"/data/get-agent-positions" => Ok(abstutil::to_json(&AgentPositions {
agents: sim
.get_unzoomed_agents(map)
.into_iter()
.chain(sim.get_unzoomed_transit_riders(map))
.map(|a| AgentPosition {
id: a.id,
trip: sim.agent_to_trip(a.id),
person: a.person,
vehicle_type: a.id.to_vehicle_type(),
pos: a.pos.to_gps(map.get_gps_bounds()),
distance_crossed: sim.agent_properties(map, a.id).dist_crossed,
})
.collect(),
})),
"/data/get-road-thruput" => Ok(abstutil::to_json(&RoadThroughput {
counts: sim
.get_analytics()
.road_thruput
.counts
.iter()
.map(|((r, a, hr), cnt)| (*r, *a, *hr, *cnt))
.collect(),
})),
"/data/get-blocked-by-graph" => Ok(abstutil::to_json(&BlockedByGraph {
blocked_by: sim
.get_blocked_by_graph(map)
.into_iter()
.map(|(id, (delay, cause))| {
(
id,
(delay, cause, sim.agent_to_trip(id), sim.agent_to_person(id)),
)
})
.collect(),
})),
"/data/trip-time-lower-bound" => {
let id = TripID(get("id")?.parse::<usize>()?);
let duration = sim.get_trip_time_lower_bound(map, id)?;
Ok(duration.inner_seconds().to_string())
}
"/data/all-trip-time-lower-bounds" => {
let results: BTreeMap<TripID, Duration> = Timer::throwaway()
.parallelize(
"calculate all trip time lower bounds",
sim.all_trip_info(),
|(id, _)| {
sim.get_trip_time_lower_bound(map, id)
.ok()
.map(|dt| (id, dt))
},
)
.into_iter()
.flatten()
.collect();
Ok(abstutil::to_json(&results))
}
"/map/get-edits" => {
let mut edits = map.get_edits().clone();
edits.commands.clear();
edits.compress(map);
Ok(abstutil::to_json(&edits.to_permanent(map)))
}
"/map/get-edit-road-command" => {
let r = RoadID(get("id")?.parse::<usize>()?);
Ok(abstutil::to_json(
&map.edit_road_cmd(r, |_| {}).to_perma(map),
))
}
"/map/get-intersection-geometry" => {
let i = IntersectionID(get("id")?.parse::<usize>()?);
Ok(abstutil::to_json(&export_geometry(map, i)))
}
"/map/get-all-geometry" => Ok(abstutil::to_json(&map.export_geometry())),
"/map/get-nearest-road" => {
let pt = LonLat::new(get("lon")?.parse::<f64>()?, get("lat")?.parse::<f64>()?);
let mut closest = FindClosest::new(map.get_bounds());
for r in map.all_roads() {
closest.add(r.id, r.center_pts.points());
}
let threshold = Distance::meters(get("threshold_meters")?.parse::<f64>()?);
match closest.closest_pt(pt.to_pt(map.get_gps_bounds()), threshold) {
Some((r, _)) => Ok(r.0.to_string()),
None => bail!("No road within {} of {}", threshold, pt),
}
}
_ => Err(anyhow!("Unknown command")),
}
}
#[derive(Serialize)]
struct FinishedTrip {
id: TripID,
person: PersonID,
duration: Option<Duration>,
distance_crossed: Distance,
mode: TripMode,
}
#[derive(Serialize)]
struct Delays {
#[serde(serialize_with = "serialize_btreemap")]
per_direction: BTreeMap<MovementID, Vec<Duration>>,
}
#[derive(Serialize)]
struct Throughput {
#[serde(serialize_with = "serialize_btreemap")]
per_direction: BTreeMap<MovementID, usize>,
}
#[derive(Serialize)]
struct AgentPositions {
agents: Vec<AgentPosition>,
}
#[derive(Serialize)]
struct AgentPosition {
id: AgentID,
trip: Option<TripID>,
person: Option<PersonID>,
vehicle_type: Option<VehicleType>,
pos: LonLat,
distance_crossed: Distance,
}
#[derive(Serialize)]
struct RoadThroughput {
counts: Vec<(RoadID, AgentType, usize, usize)>,
}
#[derive(Serialize)]
struct TrafficSignalState {
current_stage_idx: usize,
remaining_time: Duration,
accepted: BTreeSet<AgentID>,
waiting: Vec<(AgentID, TurnID, Time)>,
}
#[derive(Serialize)]
struct BlockedByGraph {
#[serde(serialize_with = "serialize_btreemap")]
blocked_by: BTreeMap<AgentID, (Duration, DelayCause, Option<TripID>, Option<PersonID>)>,
}
#[derive(Deserialize)]
struct LoadSim {
scenario: String,
modifiers: Vec<ScenarioModifier>,
edits: Option<PermanentMapEdits>,
#[serde(skip_deserializing)]
rng_seed: u64,
#[serde(skip_deserializing)]
opts: SimOptions,
}
impl LoadSim {
fn setup(&self, timer: &mut Timer) -> (Map, Sim) {
let mut scenario: Scenario = abstio::must_read_object(self.scenario.clone(), timer);
let mut map = Map::load_synchronously(scenario.map_name.path(), timer);
if let Some(perma) = self.edits.clone() {
let edits = perma.into_edits(&map).unwrap();
map.must_apply_edits(edits, timer);
map.recalculate_pathfinding_after_edits(timer);
}
let mut rng = XorShiftRng::seed_from_u64(self.rng_seed);
for m in &self.modifiers {
scenario = m.apply(&map, scenario, &mut rng);
}
let mut sim = Sim::new(&map, self.opts.clone());
sim.instantiate(&scenario, &map, &mut rng, timer);
(map, sim)
}
}
fn export_geometry(map: &Map, i: IntersectionID) -> geojson::GeoJson {
let mut pairs = Vec::new();
let i = map.get_i(i);
let center = i.polygon.center();
let mut props = serde_json::Map::new();
props.insert("type".to_string(), "intersection".into());
props.insert("id".to_string(), i.orig_id.to_string().into());
pairs.push((
i.polygon
.translate(-center.x(), -center.y())
.get_outer_ring()
.to_geojson(None),
props,
));
for r in &i.roads {
let r = map.get_r(*r);
let mut props = serde_json::Map::new();
props.insert("type".to_string(), "road".into());
props.insert("id".to_string(), r.orig_id.osm_way_id.to_string().into());
pairs.push((
r.center_pts
.to_thick_ring(r.get_width())
.translate(-center.x(), -center.y())
.to_geojson(None),
props,
));
}
geom::geometries_with_properties_to_geojson(pairs)
}
