mirror of https://github.com/rwf2/Rocket.git
43 lines
1.1 KiB
Rust
43 lines
1.1 KiB
Rust
use std::ops::Deref;
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use r2d2;
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use diesel::sqlite::SqliteConnection;
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use r2d2_diesel::ConnectionManager;
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use rocket::http::Status;
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use rocket::request::{self, FromRequest};
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use rocket::{Request, State, Outcome};
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pub type Pool = r2d2::Pool<ConnectionManager<SqliteConnection>>;
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pub const DATABASE_FILE: &'static str = env!("DATABASE_URL");
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pub fn init_pool() -> Pool {
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let config = r2d2::Config::default();
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let manager = ConnectionManager::<SqliteConnection>::new(DATABASE_FILE);
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r2d2::Pool::new(config, manager).expect("db pool")
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}
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pub struct Conn(pub r2d2::PooledConnection<ConnectionManager<SqliteConnection>>);
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impl Deref for Conn {
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type Target = SqliteConnection;
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#[inline(always)]
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fn deref(&self) -> &Self::Target {
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&self.0
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}
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}
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impl<'a, 'r> FromRequest<'a, 'r> for Conn {
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type Error = ();
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fn from_request(request: &'a Request<'r>) -> request::Outcome<Conn, ()> {
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let pool = request.guard::<State<Pool>>()?;
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match pool.get() {
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Ok(conn) => Outcome::Success(Conn(conn)),
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Err(_) => Outcome::Failure((Status::ServiceUnavailable, ()))
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}
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}
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}
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