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memory optimization

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This commit is contained in:
Paul Zinselmeyer 2023-11-06 18:38:00 +01:00
parent 5ae2a2d4e2
commit a6a4d68651
6 changed files with 204 additions and 147 deletions
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76
src/game.rs
View file

@ -1,11 +1,14 @@
use std::{
collections::{HashMap, HashSet},
ops::Deref,
sync::Arc,
time::Duration,
};
use qrcode::{render::svg, QrCode};
use rand::{distributions, Rng};
use sailfish::TemplateOnce;
use serde::Deserialize;
use tokio::{
select,
sync::{broadcast, RwLock},
@ -16,6 +19,65 @@ use crate::{
ViewerState,
};
#[derive(Debug, Clone, PartialEq, Eq, Hash, Deserialize)]
pub struct GameId(Arc<str>);
#[derive(Debug, Clone, PartialEq, Eq, Hash, Deserialize)]
pub struct PlayerId(Arc<str>);
impl Deref for GameId {
type Target = str;
fn deref(&self) -> &Self::Target {
&self.0
}
}
impl From<String> for GameId {
fn from(value: String) -> Self {
Self(value.into())
}
}
impl GameId {
pub fn random() -> Self {
Self(
rand::thread_rng()
.sample_iter(distributions::Alphanumeric)
.take(8)
.map(char::from)
.collect::<String>()
.into(),
)
}
}
impl Deref for PlayerId {
type Target = str;
fn deref(&self) -> &Self::Target {
&self.0
}
}
impl From<String> for PlayerId {
fn from(value: String) -> Self {
Self(value.into())
}
}
impl PlayerId {
pub fn random() -> Self {
Self(
rand::thread_rng()
.sample_iter(distributions::Alphanumeric)
.take(32)
.map(char::from)
.collect::<String>()
.into(),
)
}
}
#[derive(Clone, Debug)]
pub enum GameState {
NotStarted,
@ -25,18 +87,18 @@ pub enum GameState {
}
pub struct Game {
pub id: String,
pub id: GameId,
pub owner: String,
pub state: Arc<RwLock<GameState>>,
pub quiz: Quiz,
pub players: HashSet<String>,
pub players: HashSet<PlayerId>,
pub on_state_update: broadcast::Sender<()>,
pub on_submission: broadcast::Sender<()>,
pub questions: Vec<Box<dyn Question>>,
}
impl Game {
pub fn new(id: String, owner: String, quiz: Quiz) -> Self {
pub fn new(id: GameId, owner: String, quiz: Quiz) -> Self {
Self {
id,
owner,
@ -87,7 +149,7 @@ impl Game {
}
}
pub async fn player_view(&self, player_id: &str, htmx: bool) -> HandlerResult<String> {
pub async fn player_view(&self, player_id: &PlayerId, htmx: bool) -> HandlerResult<String> {
if !self.players.contains(player_id) {
return Err(Error::PlayerNotFound);
}
@ -134,7 +196,7 @@ impl Game {
pub async fn handle_answer(
&mut self,
player_id: &str,
player_id: &PlayerId,
values: &HashMap<String, String>,
) -> HandlerResult<()> {
if !self.players.contains(player_id) {
@ -145,7 +207,7 @@ impl Game {
if let GameState::Answering(i) = *state {
self.questions[i as usize]
.handle_answer(player_id, values)
.handle_answer(player_id.clone(), values)
.await?;
self.on_submission.send(());
@ -164,7 +226,7 @@ impl Game {
let viewer_state = match *state {
GameState::NotStarted => {
let url = format!("{}/{}", base_url, &self.id);
let url = format!("{}/{}", base_url, &self.id.deref());
let img = QrCode::new(&url).expect("");
let img = img.render::<svg::Color>().build();
ViewerState::NotStarted((self.players.len() as u32, img, url))

8
src/garbage_collector.rs
View file

@ -6,11 +6,11 @@ use std::{
use tokio::sync::RwLock;
use crate::game::Game;
use crate::game::{Game, GameId};
pub fn start_gc(
game_expiry: Arc<RwLock<BinaryHeap<GarbageCollectorItem>>>,
games: Arc<RwLock<HashMap<String, Game>>>,
games: Arc<RwLock<HashMap<GameId, Game>>>,
) {
let games = games.clone();
let game_expiry = game_expiry.clone();
@ -36,12 +36,12 @@ pub fn start_gc(
#[derive(PartialEq, Eq)]
pub struct GarbageCollectorItem {
id: String,
id: GameId,
expires_at: u64,
}
impl GarbageCollectorItem {
pub fn new_in(id: String, time: u64) -> Self {
pub fn new_in(id: GameId, time: u64) -> Self {
Self {
id,
expires_at: SystemTime::now()

100
src/main.rs
View file

@ -3,15 +3,14 @@
use std::{
collections::{BinaryHeap, HashMap},
env,
ops::Deref,
sync::Arc,
};
use axum::{
async_trait,
body::HttpBody,
error_handling::HandleErrorLayer,
extract::{FromRef, Multipart, Path, Query, State},
http::{Request, StatusCode, Uri},
extract::{Multipart, Path, Query, State},
http::{StatusCode, Uri},
response::{
sse::{Event, KeepAlive},
Html, IntoResponse, Redirect, Sse,
@ -21,21 +20,19 @@ use axum::{
};
use axum_htmx::{HxRedirect, HxRequest};
use axum_oidc::{
error::MiddlewareError, EmptyAdditionalClaims, OidcAuthLayer, OidcClaims, OidcClient,
OidcLoginLayer,
error::MiddlewareError, EmptyAdditionalClaims, OidcAuthLayer, OidcClaims, OidcLoginLayer,
};
use futures_util::Stream;
use game::Game;
use game::{Game, GameId, PlayerId};
use garbage_collector::{start_gc, GarbageCollectorItem};
use question::single_choice::SingleChoiceQuestion;
use rand::{distributions, Rng};
use question::{single_choice::SingleChoiceQuestion, Question};
use sailfish::TemplateOnce;
use serde::{Deserialize, Serialize};
use stream::{PlayerBroadcastStream, ViewerBroadcastStream};
use tokio::sync::RwLock;
use tower::{Layer, ServiceBuilder};
use tower::ServiceBuilder;
use tower_http::services::ServeDir;
use tower_sessions::{cookie::SameSite, Expiry, MemoryStore, SessionManagerLayer};
use tower_sessions::{cookie::SameSite, MemoryStore, SessionManagerLayer};
use crate::error::Error;
@ -50,9 +47,9 @@ mod question;
#[derive(Clone)]
pub struct AppState {
games: Arc<RwLock<HashMap<String, Game>>>,
games: Arc<RwLock<HashMap<GameId, Game>>>,
game_expiry: Arc<RwLock<BinaryHeap<GarbageCollectorItem>>>,
application_base: String,
application_base: &'static str,
}
#[tokio::main]
@ -108,7 +105,7 @@ pub async fn main() {
let app_state = AppState {
games,
game_expiry,
application_base,
application_base: Box::leak(application_base.into()),
};
let app = Router::new()
@ -147,11 +144,7 @@ pub async fn handle_create(
let quiz = quiz.ok_or(Error::QuizFileNotFound)?;
let game_id: String = rand::thread_rng()
.sample_iter(distributions::Alphanumeric)
.take(8)
.map(char::from)
.collect();
let game_id = GameId::random();
let game = Game::new(game_id.clone(), claims.subject().to_string(), quiz);
@ -159,7 +152,7 @@ pub async fn handle_create(
games.insert(game_id.clone(), game);
let url = format!("{}/{}/view", state.application_base, &game_id);
let url = format!("{}/{}/view", state.application_base, &game_id.deref());
let mut game_expiry = state.game_expiry.write().await;
game_expiry.push(GarbageCollectorItem::new_in(game_id, 24 * 3600));
@ -168,7 +161,7 @@ pub async fn handle_create(
}
pub async fn handle_view(
Path(id): Path<String>,
Path(id): Path<GameId>,
State(state): State<AppState>,
HxRequest(htmx): HxRequest,
OidcClaims(claims): OidcClaims<EmptyAdditionalClaims>,
@ -180,13 +173,12 @@ pub async fn handle_view(
return Err(Error::Forbidden);
}
Ok(Html(game.viewer_view(htmx, &state.application_base).await?))
Ok(Html(game.viewer_view(htmx, state.application_base).await?))
}
pub async fn handle_view_next(
Path(id): Path<String>,
Path(id): Path<GameId>,
State(state): State<AppState>,
HxRequest(htmx): HxRequest,
OidcClaims(claims): OidcClaims<EmptyAdditionalClaims>,
) -> HandlerResult<impl IntoResponse> {
let mut games = state.games.write().await;
@ -202,7 +194,7 @@ pub async fn handle_view_next(
}
pub async fn sse_view(
Path(id): Path<String>,
Path(id): Path<GameId>,
State(state): State<AppState>,
OidcClaims(claims): OidcClaims<EmptyAdditionalClaims>,
) -> HandlerResult<Sse<impl Stream<Item = Result<Event, Error>>>> {
@ -216,13 +208,8 @@ pub async fn sse_view(
let rx1 = game.on_state_update.subscribe();
let rx2 = game.on_submission.subscribe();
let stream = ViewerBroadcastStream::new(
rx1,
rx2,
state.games.clone(),
id,
state.application_base.clone(),
);
let stream =
ViewerBroadcastStream::new(rx1, rx2, state.games.clone(), id, state.application_base);
Ok(Sse::new(stream).keep_alive(KeepAlive::default()))
}
@ -234,27 +221,25 @@ pub struct PlayerQuery {
pub async fn handle_player(
Query(query): Query<PlayerQuery>,
Path(id): Path<String>,
Path(id): Path<GameId>,
State(state): State<AppState>,
HxRequest(htmx): HxRequest,
) -> HandlerResult<impl IntoResponse> {
let mut games = state.games.write().await;
let game = games.get_mut(&id).ok_or(Error::NotFound)?;
if let Some(player_id) = query.player {
if let Some(player_id) = query.player.map(PlayerId::from) {
Ok(Html(game.player_view(&player_id, htmx).await?).into_response())
} else {
let player_id: String = rand::thread_rng()
.sample_iter(distributions::Alphanumeric)
.take(32)
.map(char::from)
.collect();
game.players.insert(player_id.to_string());
let player_id = PlayerId::random();
game.players.insert(player_id.clone());
game.on_submission.send(());
Ok(Redirect::temporary(&format!(
"{}/{}?player={}",
state.application_base, id, player_id
state.application_base,
id.deref(),
player_id.deref()
))
.into_response())
}
@ -262,13 +247,13 @@ pub async fn handle_player(
#[derive(Deserialize)]
pub struct SubmissionPayload {
player_id: String,
player_id: PlayerId,
#[serde(flatten)]
values: HashMap<String, String>,
}
pub async fn handle_player_answer(
Path(id): Path<String>,
Path(id): Path<GameId>,
State(state): State<AppState>,
Form(form): Form<SubmissionPayload>,
) -> HandlerResult<impl IntoResponse> {
@ -282,12 +267,12 @@ pub async fn handle_player_answer(
#[derive(Deserialize)]
pub struct SsePlayerQuery {
player: String,
player: PlayerId,
}
pub async fn sse_player(
Query(query): Query<SsePlayerQuery>,
Path(id): Path<String>,
Path(id): Path<GameId>,
State(state): State<AppState>,
) -> HandlerResult<Sse<impl Stream<Item = Result<Event, Error>>>> {
let games = state.games.read().await;
@ -312,7 +297,6 @@ struct PlayTemplate<'a> {
state: PlayerState,
}
#[derive(Clone)]
pub enum PlayerState {
NotStarted,
Answering { inner_body: String },
@ -329,7 +313,6 @@ struct ViewTemplate<'a> {
state: ViewerState,
}
#[derive(Clone)]
pub enum ViewerState {
NotStarted((u32, String, String)),
Answering {
@ -357,30 +340,11 @@ pub enum QuizQuestion {
#[derive(Debug, Serialize, Deserialize, Clone)]
pub struct SingleChoice {
name: String,
answers: Vec<String>,
name: Box<str>,
answers: Box<[Box<str>]>,
correct: u32,
}
#[async_trait]
pub trait Question: Send + Sync {
async fn render_player(&self, player_id: &str, show_result: bool) -> Result<String, Error>;
async fn handle_answer(
&mut self,
player_id: &str,
values: &HashMap<String, String>,
) -> Result<(), Error>;
async fn has_answered(&self, player_id: &str) -> Result<bool, Error>;
async fn answered_correctly(&self, player_id: &str) -> Result<bool, Error>;
async fn answer_count(&self) -> Result<u32, Error>;
async fn render_viewer(&self, show_result: bool) -> Result<String, Error>;
}
impl From<QuizQuestion> for Box<dyn Question> {
fn from(value: QuizQuestion) -> Self {
match value {

26
src/question.rs
View file

@ -1 +1,27 @@
use std::collections::HashMap;
use axum::async_trait;
use crate::{error::Error, game::PlayerId};
pub mod single_choice;
#[async_trait]
pub trait Question: Send + Sync {
async fn render_player(&self, player_id: &PlayerId, show_result: bool)
-> Result<String, Error>;
async fn handle_answer(
&mut self,
player_id: PlayerId,
values: &HashMap<String, String>,
) -> Result<(), Error>;
async fn has_answered(&self, player_id: &PlayerId) -> Result<bool, Error>;
async fn answered_correctly(&self, player_id: &PlayerId) -> Result<bool, Error>;
async fn answer_count(&self) -> Result<u32, Error>;
async fn render_viewer(&self, show_result: bool) -> Result<String, Error>;
}

65
src/question/single_choice.rs
View file

@ -3,11 +3,11 @@ use std::collections::HashMap;
use axum::async_trait;
use sailfish::TemplateOnce;
use crate::{error::Error, Question, SingleChoice};
use crate::{error::Error, game::PlayerId, Question, SingleChoice};
pub struct SingleChoiceQuestion {
inner: SingleChoice,
submissions: HashMap<String, u32>,
submissions: HashMap<PlayerId, u32>,
}
impl SingleChoiceQuestion {
@ -21,12 +21,15 @@ impl SingleChoiceQuestion {
#[async_trait]
impl Question for SingleChoiceQuestion {
async fn render_player(&self, player_id: &str, show_result: bool) -> Result<String, Error> {
async fn render_player(
&self,
player_id: &PlayerId,
show_result: bool,
) -> Result<String, Error> {
if show_result {
let player_sub_index = self.submissions.get(player_id);
let player_sub_value =
player_sub_index.map(|x| self.inner.answers[*x as usize].as_str());
let player_sub_value = player_sub_index.map(|x| &*self.inner.answers[*x as usize]);
Ok(ResultTemplate {
is_correct: Some(&self.inner.correct) == player_sub_index,
@ -46,7 +49,7 @@ impl Question for SingleChoiceQuestion {
async fn handle_answer(
&mut self,
player_id: &str,
player_id: PlayerId,
values: &HashMap<String, String>,
) -> Result<(), Error> {
let value = values
@ -59,20 +62,20 @@ impl Question for SingleChoiceQuestion {
return Err(Error::InvalidInput);
}
if self.submissions.contains_key(player_id) {
if self.submissions.contains_key(&player_id) {
return Err(Error::QuestionAlreadySubmitted);
}
self.submissions.insert(player_id.to_string(), value);
self.submissions.insert(player_id, value);
Ok(())
}
async fn has_answered(&self, player_id: &str) -> Result<bool, Error> {
async fn has_answered(&self, player_id: &PlayerId) -> Result<bool, Error> {
Ok(self.submissions.get(player_id).is_some())
}
async fn answered_correctly(&self, player_id: &str) -> Result<bool, Error> {
async fn answered_correctly(&self, player_id: &PlayerId) -> Result<bool, Error> {
Ok(self
.submissions
.get(player_id)
@ -90,30 +93,34 @@ impl Question for SingleChoiceQuestion {
name: &self.inner.name,
total_submissions: self.submissions.len() as u32,
submissions: &self.submissions.iter().fold(
vec![0; self.inner.answers.len()],
vec![0; self.inner.answers.len()].into_boxed_slice(),
|mut acc, (_, v)| {
acc[*v as usize] += 1;
acc
},
),
submissions_correct: &self.submissions.iter().fold(
vec![0; self.inner.answers.len()],
|mut acc, (_, v)| {
if *v == self.inner.correct {
submissions_correct: &self
.submissions
.iter()
.filter(|(_, v)| **v == self.inner.correct)
.fold(
vec![0; self.inner.answers.len()].into_boxed_slice(),
|mut acc, (_, v)| {
acc[*v as usize] += 1;
}
acc
},
),
submissions_wrong: &self.submissions.iter().fold(
vec![0; self.inner.answers.len()],
|mut acc, (_, v)| {
if *v != self.inner.correct {
acc
},
),
submissions_wrong: &self
.submissions
.iter()
.filter(|(_, v)| **v != self.inner.correct)
.fold(
vec![0; self.inner.answers.len()].into_boxed_slice(),
|mut acc, (_, v)| {
acc[*v as usize] += 1;
}
acc
},
),
acc
},
),
correct_answer: &self.inner.answers[self.inner.correct as usize],
answers: &self.inner.answers,
}
@ -126,7 +133,7 @@ impl Question for SingleChoiceQuestion {
struct PlayerTemplate<'a> {
name: &'a str,
player_id: &'a str,
answers: &'a [String],
answers: &'a [Box<str>],
}
#[derive(TemplateOnce)]
@ -147,5 +154,5 @@ struct ViewerTemplate<'a> {
submissions_correct: &'a [u32],
submissions_wrong: &'a [u32],
correct_answer: &'a str,
answers: &'a [String],
answers: &'a [Box<str>],
}

76
src/stream.rs
View file

@ -15,43 +15,46 @@ use tokio::{
};
use tokio_util::sync::ReusableBoxFuture;
use crate::{error::Error, game::Game};
use crate::{
error::Error,
game::{Game, GameId, PlayerId},
};
pub struct PlayerBroadcastStream {
id: String,
player_id: String,
games: Arc<RwLock<HashMap<String, Game>>>,
id: GameId,
player_id: PlayerId,
games: Arc<RwLock<HashMap<GameId, Game>>>,
inner: ReusableBoxFuture<'static, (Result<Result<Event, Error>, RecvError>, Receiver<()>)>,
}
impl PlayerBroadcastStream {
async fn make_future(
mut rx: Receiver<()>,
games: Arc<RwLock<HashMap<String, Game>>>,
id: String,
player_id: String,
games: Arc<RwLock<HashMap<GameId, Game>>>,
id: GameId,
player_id: PlayerId,
) -> (Result<Result<Event, Error>, RecvError>, Receiver<()>) {
let result = match rx.recv().await {
Ok(_) => Ok(Self::build_template(games, id, player_id).await),
Ok(_) => Ok(Self::build_template(games, &id, &player_id).await),
Err(e) => Err(e),
};
(result, rx)
}
async fn build_template(
games: Arc<RwLock<HashMap<String, Game>>>,
id: String,
player_id: String,
games: Arc<RwLock<HashMap<GameId, Game>>>,
id: &GameId,
player_id: &PlayerId,
) -> Result<Event, Error> {
let games = games.read().await;
let game = games.get(&id).ok_or(Error::NotFound)?;
let game = games.get(id).ok_or(Error::NotFound)?;
Ok(Event::default().data(game.player_view(&player_id, true).await?))
Ok(Event::default().data(game.player_view(player_id, true).await?))
}
pub fn new(
recv: Receiver<()>,
games: Arc<RwLock<HashMap<String, Game>>>,
id: String,
player_id: String,
games: Arc<RwLock<HashMap<GameId, Game>>>,
id: GameId,
player_id: PlayerId,
) -> Self {
Self {
inner: ReusableBoxFuture::new(Self::make_future(
@ -91,8 +94,8 @@ impl Stream for PlayerBroadcastStream {
}
pub struct ViewerBroadcastStream {
id: String,
games: Arc<RwLock<HashMap<String, Game>>>,
id: GameId,
games: Arc<RwLock<HashMap<GameId, Game>>>,
inner: ReusableBoxFuture<
'static,
(
@ -102,16 +105,16 @@ pub struct ViewerBroadcastStream {
),
>,
base_url: String,
base_url: &'static str,
}
impl ViewerBroadcastStream {
async fn make_future(
mut rx1: Receiver<()>,
mut rx2: Receiver<()>,
games: Arc<RwLock<HashMap<String, Game>>>,
id: String,
base_url: String,
games: Arc<RwLock<HashMap<GameId, Game>>>,
id: GameId,
base_url: &'static str,
) -> (
Result<Result<Event, Error>, RecvError>,
Receiver<()>,
@ -121,27 +124,27 @@ impl ViewerBroadcastStream {
a = rx1.recv() => a,
b = rx2.recv() => b
} {
Ok(_) => Ok(Self::build_template(games, id, base_url).await),
Ok(_) => Ok(Self::build_template(games, &id, base_url).await),
Err(e) => Err(e),
};
(result, rx1, rx2)
}
async fn build_template(
games: Arc<RwLock<HashMap<String, Game>>>,
id: String,
base_url: String,
games: Arc<RwLock<HashMap<GameId, Game>>>,
id: &GameId,
base_url: &'static str,
) -> Result<Event, Error> {
let games = games.read().await;
let game = games.get(&id).ok_or(Error::NotFound)?;
let game = games.get(id).ok_or(Error::NotFound)?;
Ok(Event::default().data(game.viewer_view(true, &base_url).await?))
Ok(Event::default().data(game.viewer_view(true, base_url).await?))
}
pub fn new(
rx1: Receiver<()>,
rx2: Receiver<()>,
games: Arc<RwLock<HashMap<String, Game>>>,
id: String,
base_url: String,
games: Arc<RwLock<HashMap<GameId, Game>>>,
id: GameId,
base_url: &'static str,
) -> Self {
Self {
inner: ReusableBoxFuture::new(Self::make_future(
@ -149,7 +152,7 @@ impl ViewerBroadcastStream {
rx2,
games.clone(),
id.clone(),
base_url.clone(),
base_url,
)),
games,
id,
@ -166,13 +169,8 @@ impl Stream for ViewerBroadcastStream {
cx: &mut std::task::Context<'_>,
) -> std::task::Poll<Option<Self::Item>> {
let (result, rx1, rx2) = ready!(self.inner.poll(cx));
let future = Self::make_future(
rx1,
rx2,
self.games.clone(),
self.id.clone(),
self.base_url.clone(),
);
let future =
Self::make_future(rx1, rx2, self.games.clone(), self.id.clone(), self.base_url);
self.inner.set(future);
match result {
Ok(item) => Poll::Ready(Some(item)),