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Merge pull request #133 from nerodono/feat/status_kind-in-context
feat(core/context): add `Context::status_kind()`
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,149 @@ | ||
| use std::sync::atomic::{self, AtomicU8}; | ||
| use std::{fmt, mem}; | ||
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| use serde::{Deserialize, Serialize}; | ||
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| // === ActorStatus === | ||
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| /// Represents the current status of an actor. | ||
| /// See [The Actoromicon](https://actoromicon.rs/ch03-01-actor-lifecycle.html) for details. | ||
| #[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)] | ||
| pub struct ActorStatus { | ||
| pub(crate) kind: ActorStatusKind, | ||
| pub(crate) details: Option<String>, | ||
| } | ||
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| impl ActorStatus { | ||
| pub const ALARMING: ActorStatus = ActorStatus::new(ActorStatusKind::Alarming); | ||
| pub(crate) const FAILED: ActorStatus = ActorStatus::new(ActorStatusKind::Failed); | ||
| pub const INITIALIZING: ActorStatus = ActorStatus::new(ActorStatusKind::Initializing); | ||
| pub const NORMAL: ActorStatus = ActorStatus::new(ActorStatusKind::Normal); | ||
| pub(crate) const TERMINATED: ActorStatus = ActorStatus::new(ActorStatusKind::Terminated); | ||
| pub const TERMINATING: ActorStatus = ActorStatus::new(ActorStatusKind::Terminating); | ||
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| const fn new(kind: ActorStatusKind) -> Self { | ||
| Self { | ||
| kind, | ||
| details: None, | ||
| } | ||
| } | ||
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| /// Creates a new status with the same kind and provided details. | ||
| pub fn with_details(&self, details: impl fmt::Display) -> Self { | ||
| ActorStatus { | ||
| kind: self.kind, | ||
| details: Some(details.to_string()), | ||
| } | ||
| } | ||
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| /// Returns the corresponding [`ActorStatusKind`] for this status. | ||
| pub fn kind(&self) -> ActorStatusKind { | ||
| self.kind | ||
| } | ||
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| /// Returns details for this status, if provided. | ||
| pub fn details(&self) -> Option<&str> { | ||
| self.details.as_deref() | ||
| } | ||
| } | ||
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| impl fmt::Display for ActorStatus { | ||
| fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { | ||
| match &self.details { | ||
| Some(details) => write!(f, "{:?}: {}", self.kind, details), | ||
| None => write!(f, "{:?}", self.kind), | ||
| } | ||
| } | ||
| } | ||
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| // === ActorStatusKind === | ||
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| /// A list specifying statuses of actors. It's used with the [`ActorStatus`]. | ||
| #[derive(Debug, Clone, Copy, PartialEq, Eq, Serialize, Deserialize)] | ||
| #[non_exhaustive] | ||
| #[repr(u8)] | ||
| pub enum ActorStatusKind { | ||
| Normal, | ||
| Initializing, | ||
| Terminating, | ||
| Terminated, | ||
| Alarming, | ||
| Failed, | ||
| } | ||
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| impl ActorStatusKind { | ||
| #[inline] | ||
| pub const fn is_normal(&self) -> bool { | ||
| matches!(self, Self::Normal) | ||
| } | ||
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| #[inline] | ||
| pub const fn is_initializing(&self) -> bool { | ||
| matches!(self, Self::Initializing) | ||
| } | ||
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| #[inline] | ||
| pub const fn is_terminating(&self) -> bool { | ||
| matches!(self, Self::Terminating) | ||
| } | ||
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| #[inline] | ||
| pub const fn is_terminated(&self) -> bool { | ||
| matches!(self, Self::Terminated) | ||
| } | ||
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| #[inline] | ||
| pub const fn is_alarming(&self) -> bool { | ||
| matches!(self, Self::Alarming) | ||
| } | ||
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| #[inline] | ||
| pub const fn is_failed(&self) -> bool { | ||
| matches!(self, Self::Failed) | ||
| } | ||
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| #[inline] | ||
| pub const fn is_finished(&self) -> bool { | ||
| self.is_failed() || self.is_terminated() | ||
| } | ||
| } | ||
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| impl ActorStatusKind { | ||
| pub(crate) fn as_str(&self) -> &'static str { | ||
| match self { | ||
| ActorStatusKind::Normal => "Normal", | ||
| ActorStatusKind::Initializing => "Initializing", | ||
| ActorStatusKind::Terminating => "Terminating", | ||
| ActorStatusKind::Terminated => "Terminated", | ||
| ActorStatusKind::Alarming => "Alarming", | ||
| ActorStatusKind::Failed => "Failed", | ||
| } | ||
| } | ||
| } | ||
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| // === AtomicActorStatusKind === | ||
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| #[derive(Debug)] | ||
| #[repr(transparent)] | ||
| pub(crate) struct AtomicActorStatusKind(AtomicU8); | ||
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| impl From<ActorStatusKind> for AtomicActorStatusKind { | ||
| fn from(value: ActorStatusKind) -> Self { | ||
| Self(AtomicU8::new(value as _)) | ||
| } | ||
| } | ||
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| impl AtomicActorStatusKind { | ||
| pub(crate) fn store(&self, kind: ActorStatusKind, ordering: atomic::Ordering) { | ||
| self.0.store(kind as u8, ordering); | ||
| } | ||
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| pub(crate) fn load(&self, ordering: atomic::Ordering) -> ActorStatusKind { | ||
| let result = self.0.load(ordering); | ||
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| // SAFETY: `ActorStatusKind` has `#[repr(u8)]` annotation. The only | ||
| // place where value may be changed is `Self::store`, which consumes `ActorStatusKind`, thus, | ||
| // guarantees that possibly invalid value cannot be stored | ||
| unsafe { mem::transmute::<u8, ActorStatusKind>(result) } | ||
| } | ||
| } |
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