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use actix_service::{NewService, Service};
use futures::future::{ok, FutureResult};
use futures::{try_ready, Async, Future, Poll};
use tokio_tcp::TcpStream;
use trust_dns_resolver::AsyncResolver;
use crate::connect::{Address, Connect, Connection};
use crate::connector::{TcpConnector, TcpConnectorFactory};
use crate::error::ConnectError;
use crate::resolver::{Resolver, ResolverFactory};
pub struct ConnectServiceFactory<T> {
tcp: TcpConnectorFactory<T>,
resolver: ResolverFactory<T>,
}
impl<T> ConnectServiceFactory<T> {
pub fn new() -> Self {
ConnectServiceFactory {
tcp: TcpConnectorFactory::default(),
resolver: ResolverFactory::default(),
}
}
pub fn with_resolver(resolver: AsyncResolver) -> Self {
ConnectServiceFactory {
tcp: TcpConnectorFactory::default(),
resolver: ResolverFactory::new(resolver),
}
}
pub fn service(&self) -> ConnectService<T> {
ConnectService {
tcp: self.tcp.service(),
resolver: self.resolver.service(),
}
}
}
impl<T> Default for ConnectServiceFactory<T> {
fn default() -> Self {
ConnectServiceFactory {
tcp: TcpConnectorFactory::default(),
resolver: ResolverFactory::default(),
}
}
}
impl<T> Clone for ConnectServiceFactory<T> {
fn clone(&self) -> Self {
ConnectServiceFactory {
tcp: self.tcp.clone(),
resolver: self.resolver.clone(),
}
}
}
impl<T: Address> NewService for ConnectServiceFactory<T> {
type Request = Connect<T>;
type Response = Connection<T, TcpStream>;
type Error = ConnectError;
type Config = ();
type Service = ConnectService<T>;
type InitError = ();
type Future = FutureResult<Self::Service, Self::InitError>;
fn new_service(&self, _: &()) -> Self::Future {
ok(self.service())
}
}
#[derive(Clone)]
pub struct ConnectService<T> {
tcp: TcpConnector<T>,
resolver: Resolver<T>,
}
impl<T: Address> Service for ConnectService<T> {
type Request = Connect<T>;
type Response = Connection<T, TcpStream>;
type Error = ConnectError;
type Future = ConnectServiceResponse<T>;
fn poll_ready(&mut self) -> Poll<(), Self::Error> {
Ok(Async::Ready(()))
}
fn call(&mut self, req: Connect<T>) -> Self::Future {
ConnectServiceResponse {
fut1: Some(self.resolver.call(req)),
fut2: None,
tcp: self.tcp.clone(),
}
}
}
pub struct ConnectServiceResponse<T: Address> {
fut1: Option<<Resolver<T> as Service>::Future>,
fut2: Option<<TcpConnector<T> as Service>::Future>,
tcp: TcpConnector<T>,
}
impl<T: Address> Future for ConnectServiceResponse<T> {
type Item = Connection<T, TcpStream>;
type Error = ConnectError;
fn poll(&mut self) -> Poll<Self::Item, Self::Error> {
if let Some(ref mut fut) = self.fut1 {
let res = try_ready!(fut.poll());
let _ = self.fut1.take();
self.fut2 = Some(self.tcp.call(res));
}
if let Some(ref mut fut) = self.fut2 {
return fut.poll();
}
Ok(Async::NotReady)
}
}