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use crate::Id;
use std::net::SocketAddr;
use super::builder::Port;
use super::{Chart, Entry};
impl<const N: usize> Chart<N, Port> {
/// Get all the `SocketAddr`'s for a given node's `Id`
///
/// # Note
/// returns None if the node was not in the Chart
///
/// # Performance
/// This locks the map. if you need adresses for many nodes
/// is faster to get a vector of them at once [`Self::addr_lists_vec()`]
/// instead of calling this repeatedly
///
/// # Panics
/// This function panics when called with the `Id` of the chart instance
/// it is called on
///
/// # Examples
/// ```rust
/// # use std::error::Error;
/// # use instance_chart::{discovery, ChartBuilder};
/// #
/// # #[tokio::main]
/// # async fn main() -> Result<(), Box<dyn Error>> {
/// let service_ports = [8042, 8043, 8044];
/// let chart = ChartBuilder::new()
/// .with_id(1)
/// # .with_discovery_port(43794)
/// .with_service_ports(service_ports)
/// .finish()?;
/// let maintain = discovery::maintain(chart.clone());
/// let _ = tokio::spawn(maintain); // maintain task will run forever
/// let from_chart = chart.get_addr_list(2);
/// assert_eq!(None, from_chart);
/// # Ok(())
/// # }
/// ```
// lock poisoning happens only on crash in another thread, in which
// case panicing here is expected
#[must_use]
pub fn get_addr_list(&self, id: Id) -> Option<[SocketAddr; N]> {
assert_ne!(self.our_id(), id, "Can not call with our own id");
let map = self.map.lock().unwrap();
let Entry { ip, msg: ports } = map.get(&id)?;
let arr = ports.map(|p| SocketAddr::new(*ip, p));
Some(arr)
}
}
impl<const N: usize> Chart<N, Port> {
/// Get a nodes nth `SocketAddr`'s given its `Id`
///
/// # Note
/// returns None if the node was not in the Chart
///
/// # Panics
/// This function panics when called with the `Id` of the chart instance
/// it is called on
///
/// # Performance
/// This locks the map. if you need adresses for many nodes
/// is faster to get a vector of them at once [`Self::addr_lists_vec()`]
/// instead of calling this repeatedly
///
/// # Examples
/// ```rust
/// # use std::error::Error;
/// # use instance_chart::{discovery, ChartBuilder};
/// #
/// # #[tokio::main]
/// # async fn main() -> Result<(), Box<dyn Error>> {
/// let port = 8043;
/// let chart = ChartBuilder::new()
/// .with_id(1)
/// # .with_discovery_port(43794)
/// .with_service_ports([8042, port, 8044])
/// .finish()?;
/// let maintain = discovery::maintain(chart.clone());
/// let _ = tokio::spawn(maintain); // maintain task will run forever
/// let from_chart = chart.get_nth_addr::<2>(2);
/// assert_eq!(None, from_chart);
/// # Ok(())
/// # }
/// ```
// lock poisoning happens only on crash in another thread, in which
// case panicing here is expected
#[must_use]
pub fn get_nth_addr<const IDX: usize>(&self, id: Id) -> Option<SocketAddr> {
assert_ne!(self.our_id(), id, "Can not call with our own id");
let map = self.map.lock().unwrap();
let Entry { ip, msg: ports } = map.get(&id)?;
let port = ports[IDX];
Some(SocketAddr::new(*ip, port))
}
}
impl Chart<1, Port> {
/// Get a nodes `SocketAddr`'s given its `Id`
///
/// # Note
/// returns None if the node was not in the Chart
///
/// # Panics
/// This function panics when called with the `Id` of the chart instance
/// it is called on
///
/// # Performance
/// This locks the map. if you need adresses for many nodes
/// is faster to get a vector of them at once [`Self::addr_lists_vec()`]
/// instead of calling this repeatedly
///
/// # Examples
/// ```rust
/// # use std::error::Error;
/// # use instance_chart::{discovery, ChartBuilder};
/// #
/// # #[tokio::main]
/// # async fn main() -> Result<(), Box<dyn Error>> {
/// let port = 8043;
/// let chart = ChartBuilder::new()
/// .with_id(1)
/// # .with_discovery_port(43794)
/// .with_service_ports([port])
/// .finish()?;
/// let maintain = discovery::maintain(chart.clone());
/// let _ = tokio::spawn(maintain); // maintain task will run forever
/// let from_chart = chart.get_addr(2);
/// assert_eq!(None, from_chart);
/// # Ok(())
/// # }
/// ```
// lock poisoning happens only on crash in another thread, in which
// case panicing here is expected
#[must_use]
pub fn get_addr(&self, id: Id) -> Option<SocketAddr> {
assert_ne!(self.our_id(), id, "Can not call with our own id");
let map = self.map.lock().unwrap();
let Entry { ip, msg: [port] } = map.get(&id)?;
Some(SocketAddr::new(*ip, *port))
}
}
#[cfg(test)]
mod tests {
use crate::chart::Entry;
use crate::{Chart, Id};
use std::net::{IpAddr, Ipv4Addr, SocketAddr};
#[tokio::test]
async fn get_addr_list() {
fn test_kv(n: u8) -> (Id, Entry<[u16; 1]>) {
let ip = IpAddr::V4(Ipv4Addr::new(n, 0, 0, 1));
let port = 8000 + n as u16;
(n as u64, Entry { ip, msg: [port] })
}
let chart = Chart::test(test_kv).await;
let iter = chart.get_addr_list(2).unwrap();
let entry = test_kv(2).1;
let correct = [SocketAddr::new(entry.ip, entry.msg[0])];
assert_eq!(iter, correct)
}
fn entry_3ports(n: u8) -> (Id, Entry<[u16; 3]>) {
let ip = IpAddr::V4(Ipv4Addr::new(n, 0, 0, 1));
let port1 = 8000 + n as u16;
let port2 = 7000 + n as u16;
let port3 = 6000 + n as u16;
(
n as u64,
Entry {
ip,
msg: [port1, port2, port3],
},
)
}
#[tokio::test]
async fn get_nth_addr() {
let chart = Chart::test(entry_3ports).await;
let addr = chart.get_nth_addr::<2>(2).unwrap();
let entry = entry_3ports(2).1;
let correct = SocketAddr::new(entry.ip, entry.msg[2]);
assert_eq!(addr, correct)
}
}