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#![doc(html_root_url="https://sfackler.github.io/r2d2-postgres/doc")]
#![warn(missing_docs)]
extern crate r2d2;
extern crate postgres;
use std::error;
use std::error::Error as _StdError;
use std::fmt;
use postgres::{IntoConnectParams, SslMode};
#[derive(Debug)]
pub enum Error {
Connect(postgres::ConnectError),
Other(postgres::Error),
}
impl fmt::Display for Error {
fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
write!(fmt, "{}: {}", self.description(), self.cause().unwrap())
}
}
impl error::Error for Error {
fn description(&self) -> &str {
match *self {
Error::Connect(_) => "Error opening a connection",
Error::Other(_) => "Error communicating with server",
}
}
fn cause(&self) -> Option<&error::Error> {
match *self {
Error::Connect(ref err) => Some(err as &error::Error),
Error::Other(ref err) => Some(err as &error::Error),
}
}
}
#[derive(Debug)]
pub struct PostgresConnectionManager {
params: postgres::ConnectParams,
ssl_mode: SslMode,
}
impl PostgresConnectionManager {
pub fn new<T: IntoConnectParams>(params: T, ssl_mode: SslMode)
-> Result<PostgresConnectionManager, postgres::ConnectError> {
Ok(PostgresConnectionManager {
params: try!(params.into_connect_params()),
ssl_mode: ssl_mode,
})
}
}
impl r2d2::ConnectionManager for PostgresConnectionManager {
type Connection = postgres::Connection;
type Error = Error;
fn connect(&self) -> Result<postgres::Connection, Error> {
postgres::Connection::connect(self.params.clone(), &self.ssl_mode).map_err(Error::Connect)
}
fn is_valid(&self, conn: &mut postgres::Connection) -> Result<(), Error> {
conn.batch_execute("").map_err(Error::Other)
}
fn has_broken(&self, conn: &mut postgres::Connection) -> bool {
conn.is_desynchronized()
}
}