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use std::collections::HashMap;
use std::net::{IpAddr, Ipv6Addr, SocketAddr};
use futures::{future, Future};
use Error;
use service::locator::{EventGraph, Locator};
#[derive(Debug)]
pub struct ResolveInfo {
addrs: Vec<SocketAddr>,
methods: Option<HashMap<u64, EventGraph>>,
}
impl ResolveInfo {
pub fn new(addrs: Vec<SocketAddr>, methods: Option<HashMap<u64, EventGraph>>) -> Self {
Self {
addrs: addrs,
methods: methods,
}
}
pub fn into_components(self) -> (Vec<SocketAddr>, Option<HashMap<u64, EventGraph>>) {
(self.addrs, self.methods)
}
}
pub trait Resolve {
type Future: Future<Item=ResolveInfo, Error=Error>;
fn resolve(&mut self, name: &str) -> Self::Future;
}
#[derive(Clone, Debug)]
pub struct FixedResolver {
addrs: Vec<SocketAddr>,
}
impl FixedResolver {
pub fn new(addrs: Vec<SocketAddr>) -> Self {
FixedResolver {
addrs: addrs,
}
}
pub fn addrs(&self) -> &[SocketAddr] {
&self.addrs
}
}
impl Default for FixedResolver {
fn default() -> Self {
FixedResolver {
addrs: vec![SocketAddr::new(IpAddr::V6(Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 1)), 10053)],
}
}
}
impl Resolve for FixedResolver {
type Future = future::FutureResult<ResolveInfo, Error>;
fn resolve(&mut self, _name: &str) -> Self::Future {
let result = ResolveInfo {
addrs: self.addrs.clone(),
methods: None,
};
future::ok(result)
}
}
#[derive(Debug)]
pub struct Resolver {
locator: Locator,
}
impl Resolver {
pub fn new(locator: Locator) -> Self {
Self {
locator: locator,
}
}
}
impl Resolve for Resolver {
type Future = Box<Future<Item=ResolveInfo, Error=Error>>;
fn resolve(&mut self, name: &str) -> Self::Future {
box self.locator.resolve(name).map(|info| info.into())
}
}
#[cfg(test)]
mod test {
use std::net::{IpAddr, Ipv4Addr, Ipv6Addr, SocketAddr};
use super::FixedResolver;
#[test]
fn fixed_resolver_saves_addrs() {
let addrs = vec![
SocketAddr::new(IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1)), 10053),
];
let resolver = FixedResolver::new(addrs.clone());
assert_eq!(addrs, resolver.addrs());
}
#[test]
fn fixed_resolver_default_addrs() {
let resolver = FixedResolver::default();
assert_eq!(vec![SocketAddr::new(IpAddr::V6(Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 1)), 10053)],
resolver.addrs());
}
}