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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,144 @@ | ||
| use std::borrow::Cow; | ||
| use std::fmt::Debug; | ||
| use std::marker::Send; | ||
| use std::sync::Arc; | ||
|
|
||
| use async_recursion::async_recursion; | ||
| use async_trait::async_trait; | ||
| use nativelink_error::Error; | ||
|
|
||
| type HealthComponent = String; | ||
| type TypeName = Cow<'static, str>; | ||
| pub type Message = Cow<'static, str>; | ||
|
|
||
| #[derive(Debug, Clone, PartialEq, Eq, Hash)] | ||
| pub enum HealthStatus { | ||
| Ok(TypeName, Message), | ||
| Initializing(TypeName, Message), | ||
| Warning(TypeName, Message), | ||
| Failed(TypeName, Message), | ||
| } | ||
|
|
||
| #[derive(Clone, Debug, PartialEq, Eq, Hash)] | ||
| pub struct HealthStatusDescription { | ||
| pub component: HealthComponent, | ||
| pub status: HealthStatus, | ||
| } | ||
|
|
||
| #[async_trait] | ||
| pub trait HealthStatusIndicator: Sync + Send + Unpin { | ||
| fn type_name(&self) -> TypeName { | ||
| Cow::Borrowed(std::any::type_name::<Self>()) | ||
| } | ||
|
|
||
| async fn check_health(self: Arc<Self>) -> Result<HealthStatus, Error> { | ||
| Ok(self.make_ok("ok".into())) | ||
| } | ||
|
|
||
| fn make_ok(&self, message: Message) -> HealthStatus { | ||
| HealthStatus::Ok(self.type_name(), message) | ||
| } | ||
|
|
||
| fn make_initializing(&self, message: Message) -> HealthStatus { | ||
| HealthStatus::Initializing(self.type_name(), message) | ||
| } | ||
|
|
||
| fn make_warning(&self, message: Message) -> HealthStatus { | ||
| HealthStatus::Warning(self.type_name(), message) | ||
| } | ||
|
|
||
| fn make_failed(&self, message: Message) -> HealthStatus { | ||
| HealthStatus::Failed(self.type_name(), message) | ||
| } | ||
| } | ||
|
|
||
| #[derive(Default, Clone)] | ||
| pub struct HealthRegistry { | ||
| component: HealthComponent, | ||
| indicators: Vec<Arc<dyn HealthStatusIndicator>>, | ||
| registries: Vec<HealthRegistry>, | ||
| } | ||
|
|
||
| impl HealthRegistry { | ||
| pub fn new(component: HealthComponent) -> Self { | ||
| Self { | ||
| component, | ||
| ..Default::default() | ||
| } | ||
| } | ||
|
|
||
| pub fn register_indicator(&mut self, indicator: Arc<dyn HealthStatusIndicator>) { | ||
| self.indicators.push(indicator); | ||
| } | ||
|
|
||
| pub fn add_dependency(&mut self, component: HealthComponent) -> &mut Self { | ||
| let dependency = HealthRegistry::new(component); | ||
|
|
||
| self.registries.push(dependency); | ||
| self.registries | ||
| .last_mut() | ||
| .expect("dependencies should not to be empty.") | ||
| } | ||
|
|
||
| #[async_recursion] | ||
| async fn flatten( | ||
| &mut self, | ||
| results: &mut Vec<HealthStatusDescription>, | ||
| parent_component: &HealthComponent, | ||
| component: &HealthComponent, | ||
| indicators: &Vec<Arc<dyn HealthStatusIndicator>>, | ||
| registries: &Vec<HealthRegistry>, | ||
| ) -> Result<(), Error> { | ||
| let component_name = &format!("{parent_component}/{component}"); | ||
| for indicator in indicators { | ||
| let result = indicator.clone().check_health().await; | ||
|
|
||
| let health_status = match result { | ||
| Ok(health_status) => HealthStatusDescription { | ||
| component: component_name.clone(), | ||
| status: health_status, | ||
| }, | ||
| Err(error) => HealthStatusDescription { | ||
| component: component_name.clone(), | ||
| status: indicator.make_failed(format!("health check failed: {error}").into()), | ||
| }, | ||
| }; | ||
|
|
||
| results.push(health_status); | ||
| } | ||
|
|
||
| for registry in registries { | ||
| let _ = self | ||
| .clone() | ||
| .flatten( | ||
| results, | ||
| component_name, | ||
| ®istry.component, | ||
| ®istry.indicators, | ||
| ®istry.registries, | ||
| ) | ||
| .await; | ||
| } | ||
|
|
||
| Ok(()) | ||
| } | ||
|
|
||
| pub async fn flatten_indicators(&mut self) -> Vec<HealthStatusDescription> { | ||
| let mut health_status_results = Vec::new(); | ||
| let parent_component: HealthComponent = "".into(); | ||
| let component = &self.component; | ||
| let indicators = &self.indicators; | ||
| let registries = &self.registries; | ||
| let _ = self | ||
| .clone() | ||
| .flatten( | ||
| &mut health_status_results, | ||
| &parent_component, | ||
| component, | ||
| indicators, | ||
| registries, | ||
| ) | ||
| .await; | ||
| health_status_results | ||
| } | ||
| } |
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