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