bitwarden_rs/src/db/mod.rs

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2018-02-10 00:00:55 +00:00
use std::ops::Deref;
use diesel::{Connection as DieselConnection, ConnectionError};
use diesel::sqlite::SqliteConnection;
use diesel::r2d2;
use diesel::r2d2::ConnectionManager;
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use rocket::http::Status;
use rocket::request::{self, FromRequest};
use rocket::{Outcome, Request, State};
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use crate::CONFIG;
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/// An alias to the database connection used
type Connection = SqliteConnection;
/// An alias to the type for a pool of Diesel SQLite connections.
type Pool = r2d2::Pool<ConnectionManager<Connection>>;
/// Connection request guard type: a wrapper around an r2d2 pooled connection.
pub struct DbConn(pub r2d2::PooledConnection<ConnectionManager<Connection>>);
pub mod schema;
pub mod models;
/// Initializes a database pool.
pub fn init_pool() -> Pool {
let manager = ConnectionManager::new(&*CONFIG.database_url);
r2d2::Pool::builder()
.build(manager)
.expect("Failed to create pool")
}
pub fn get_connection() -> Result<Connection, ConnectionError> {
Connection::establish(&CONFIG.database_url)
}
/// Attempts to retrieve a single connection from the managed database pool. If
/// no pool is currently managed, fails with an `InternalServerError` status. If
/// no connections are available, fails with a `ServiceUnavailable` status.
impl<'a, 'r> FromRequest<'a, 'r> for DbConn {
type Error = ();
fn from_request(request: &'a Request<'r>) -> request::Outcome<DbConn, ()> {
let pool = request.guard::<State<Pool>>()?;
match pool.get() {
Ok(conn) => Outcome::Success(DbConn(conn)),
Err(_) => Outcome::Failure((Status::ServiceUnavailable, ()))
}
}
}
// For the convenience of using an &DbConn as a &Database.
impl Deref for DbConn {
type Target = Connection;
fn deref(&self) -> &Self::Target {
&self.0
}
}