129 lines
3.9 KiB
Rust
129 lines
3.9 KiB
Rust
use failure::{Error, err_msg};
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use tungstenite::Message;
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use tungstenite::protocol::WebSocket;
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use tungstenite::server::accept;
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use tungstenite::Message::Binary;
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use std::net::{TcpListener, TcpStream};
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use serde_cbor::{to_vec};
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use std::env;
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use std::thread::{spawn, sleep};
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use std::time::{Instant, Duration};
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use r2d2::{Pool};
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use r2d2::{PooledConnection};
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use r2d2_postgres::{TlsMode, PostgresConnectionManager};
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static DB_POOL_SIZE: u32 = 20;
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pub type Db = PooledConnection<PostgresConnectionManager>;
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use rpc::{Rpc};
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use warden::{warden};
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#[derive(Debug,Clone,Serialize,Deserialize)]
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struct RpcErrorResponse {
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err: String
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}
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fn receive(db: Db, begin: Instant, rpc: &Rpc, msg: Message, client: &mut WebSocket<TcpStream>) -> Result<String, Error> {
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match rpc.receive(msg, begin, &db, client) {
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Ok(reply) => {
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let response = to_vec(&reply)
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.expect("failed to serialize response");
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client.write_message(Binary(response))?;
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return Ok(reply.method);
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},
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Err(e) => {
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let response = to_vec(&RpcErrorResponse { err: e.to_string() })
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.expect("failed to serialize error response");
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client.write_message(Binary(response))?;
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return Err(err_msg(e));
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}
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}
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}
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pub fn db_connection(url: String) -> Pool<PostgresConnectionManager> {
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let manager = PostgresConnectionManager::new(url, TlsMode::None)
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.expect("could not instantiate pg manager");
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Pool::builder()
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.max_size(DB_POOL_SIZE)
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.build(manager)
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.expect("Failed to create pool.")
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}
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// fn print_panic_payload(ctx: &str, payload: &(Any + Send + 'static)) {
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// let d = format!("{:?}", payload);
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// let s = if let Some(s) = payload.downcast_ref::<String>() {
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// &s
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// } else if let Some(s) = payload.downcast_ref::<&str>() {
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// s
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// } else {
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// // "PAYLOAD IS NOT A STRING"
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// d.as_str()
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// };
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// info!("{}: PANIC OCCURRED: {}", ctx, s);
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// }
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pub fn start() {
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// panic::set_hook(Box::new(|panic_info| {
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// print_panic_payload("set_hook", panic_info.payload());
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// if let Some(location) = panic_info.location() {
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// info!("LOCATION: {}:{}", location.file(), location.line());
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// } else {
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// info!("NO LOCATION INFORMATION");
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// }
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// }));
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let database_url = env::var("DATABASE_URL")
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.expect("DATABASE_URL must be set");
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let pool = db_connection(database_url);
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// {
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// let startup_connection = pool.get().expect("unable to get db connection");
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// startup(startup_connection).unwrap();
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// }
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let server = TcpListener::bind("0.0.0.0:40000").unwrap();
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let warden_pool = pool.clone();
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spawn(move || {
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loop {
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let db_connection = warden_pool.get().expect("unable to get db connection");
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if let Err(e) = warden(db_connection) {
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info!("{:?}", e);
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}
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sleep(Duration::new(1, 0));
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}
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});
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for stream in server.incoming() {
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let db = pool.clone();
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spawn(move || {
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let mut websocket = accept(stream.unwrap()).unwrap();
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let rpc = Rpc {};
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loop {
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match websocket.read_message() {
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Ok(msg) => {
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let begin = Instant::now();
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let db_connection = db.get().expect("unable to get db connection");
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match receive(db_connection, begin, &rpc, msg, &mut websocket) {
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Ok(_) => (),
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Err(e) => warn!("{:?}", e),
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}
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},
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// connection is closed
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Err(e) => {
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info!("{:?}", e);
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return;
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}
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};
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}
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});
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}
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}
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