rust-postgres/postgres/src/client.rs

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use fallible_iterator::FallibleIterator;
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use futures::{Async, Future, Poll, Stream};
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use std::io::{self, Read};
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use tokio_postgres::tls::{MakeTlsConnect, TlsConnect};
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use tokio_postgres::types::{ToSql, Type};
use tokio_postgres::Error;
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#[cfg(feature = "runtime")]
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use tokio_postgres::Socket;
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#[cfg(feature = "runtime")]
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use crate::Config;
use crate::{CopyOutReader, Query, SimpleQuery, Statement, ToStatement, Transaction};
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pub struct Client(tokio_postgres::Client);
impl Client {
#[cfg(feature = "runtime")]
pub fn connect<T>(params: &str, tls_mode: T) -> Result<Client, Error>
where
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T: MakeTlsConnect<Socket> + 'static + Send,
T::TlsConnect: Send,
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T::Stream: Send,
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<T::TlsConnect as TlsConnect<Socket>>::Future: Send,
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{
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params.parse::<Config>()?.connect(tls_mode)
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}
#[cfg(feature = "runtime")]
pub fn configure() -> Config {
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Config::new()
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}
pub fn prepare(&mut self, query: &str) -> Result<Statement, Error> {
self.0.prepare(query).wait().map(Statement)
}
pub fn prepare_typed(&mut self, query: &str, types: &[Type]) -> Result<Statement, Error> {
self.0.prepare_typed(query, types).wait().map(Statement)
}
pub fn execute<T>(&mut self, query: &T, params: &[&dyn ToSql]) -> Result<u64, Error>
where
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T: ?Sized + ToStatement,
{
let statement = query.__statement(self)?;
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self.0.execute(&statement.0, params).wait()
}
pub fn query<T>(&mut self, query: &T, params: &[&dyn ToSql]) -> Result<Query<'_>, Error>
where
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T: ?Sized + ToStatement,
{
let statement = query.__statement(self)?;
Ok(Query::new(self.0.query(&statement.0, params)))
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}
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pub fn copy_in<T, R>(
&mut self,
query: &T,
params: &[&dyn ToSql],
reader: R,
) -> Result<u64, Error>
where
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T: ?Sized + ToStatement,
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R: Read,
{
let statement = query.__statement(self)?;
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self.0
.copy_in(&statement.0, params, CopyInStream(reader))
.wait()
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}
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pub fn copy_out<T>(
&mut self,
query: &T,
params: &[&dyn ToSql],
) -> Result<CopyOutReader<'_>, Error>
where
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T: ?Sized + ToStatement,
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{
let statement = query.__statement(self)?;
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let stream = self.0.copy_out(&statement.0, params);
CopyOutReader::new(stream)
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}
pub fn simple_query(&mut self, query: &str) -> Result<SimpleQuery<'_>, Error> {
Ok(SimpleQuery::new(self.0.simple_query(query)))
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}
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pub fn transaction(&mut self) -> Result<Transaction<'_>, Error> {
self.simple_query("BEGIN")?.count()?;
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Ok(Transaction::new(self))
}
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pub fn is_closed(&self) -> bool {
self.0.is_closed()
}
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pub fn get_ref(&self) -> &tokio_postgres::Client {
&self.0
}
pub fn get_mut(&mut self) -> &mut tokio_postgres::Client {
&mut self.0
}
pub fn into_inner(self) -> tokio_postgres::Client {
self.0
}
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}
impl From<tokio_postgres::Client> for Client {
fn from(c: tokio_postgres::Client) -> Client {
Client(c)
}
}
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struct CopyInStream<R>(R);
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impl<R> Stream for CopyInStream<R>
where
R: Read,
{
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type Item = Vec<u8>;
type Error = io::Error;
fn poll(&mut self) -> Poll<Option<Vec<u8>>, io::Error> {
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let mut buf = vec![];
match self.0.by_ref().take(4096).read_to_end(&mut buf)? {
0 => Ok(Async::Ready(None)),
_ => Ok(Async::Ready(Some(buf))),
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}
}
}