soph_core/support/
container.rs

1use crate::{error::ContainerError, traits::InstanceTrait, BoxFuture, Closure, Instance, Result};
2use std::{
3    any::TypeId,
4    collections::HashMap,
5    sync::{Arc, OnceLock},
6};
7
8static CONTAINER: OnceLock<Container> = OnceLock::new();
9
10type InstanceClosures = Vec<(
11    String,
12    Closure<BoxFuture<'static, Result<(), ContainerError>>>,
13    Closure<Result<(), ContainerError>>,
14)>;
15
16#[derive(Default)]
17pub struct Container {
18    facades: HashMap<TypeId, Instance>,
19    closures: InstanceClosures,
20}
21
22impl Container {
23    pub async fn register<T: InstanceTrait>(&mut self) -> Result<(), ContainerError> {
24        let instance = Arc::new(T::register(self).await.map_err(|err| ContainerError::Register {
25            instance: T::name(),
26            source: Box::new(err),
27        })?);
28
29        self.facades.insert(TypeId::of::<T>(), instance);
30
31        self.closures.push((T::name(), Arc::new(T::boot), Arc::new(T::cleanup)));
32
33        Ok(())
34    }
35
36    pub async fn boot(self) -> Result<(), ContainerError> {
37        let container = CONTAINER.get_or_init(|| self);
38
39        for (name, boot, _) in &container.closures {
40            boot().await.map_err(|err| ContainerError::Boot {
41                instance: name.to_owned(),
42                source: Box::new(err),
43            })?
44        }
45
46        Ok(())
47    }
48
49    pub fn cleanup(&self) -> Result<(), ContainerError> {
50        for (name, _, cleaner) in &self.closures {
51            cleaner().map_err(|err| ContainerError::Clean {
52                instance: name.to_owned(),
53                source: Box::new(err),
54            })?
55        }
56
57        Ok(())
58    }
59
60    pub fn instances(&self) -> Vec<&String> {
61        self.closures.iter().map(|(name, _, _)| name).collect()
62    }
63
64    pub fn resolve<T: InstanceTrait>(&self) -> Result<&T, ContainerError> {
65        let instance = self
66            .facades
67            .get(&TypeId::of::<T>())
68            .and_then(|boxed| boxed.downcast_ref::<T>())
69            .ok_or(ContainerError::Resolve { instance: T::name() })?;
70
71        Ok(instance)
72    }
73}
74
75pub fn app() -> &'static Container {
76    CONTAINER.get().expect("`Container` not initialized")
77}
soph_core/support/container.rs

soph_core/support/
container.rs
