harmos-runtime 0.1.6

Harmos runtime: managed state, undo, recovery, background work and typed streams.
Documentation 
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/* ***
 *
 * Harmos
 *
 * SPDX-License-Identifier: Apache-2.0
 *
 * ***
 */

/* === Modules === */

/* === Re-Exports === */

pub use harmos_domain::state::{DefinitionId, Envelope, FactSource, Kind, SystemFact};

/* === Imports === */

// Standard Library Imports
use std::any::Any;
use std::sync::Arc;

// Third Party Imports

// Local Imports
use crate::Application;

/* === Constants === */

/* === Macros === */

/* === Type Aliases === */

/* === Structs === */

/* === Enums === */

pub enum Recorded<A: Application> {
    Transaction(Arc<A::Transaction>),
    Record(A::Record),
    System(SystemFact),
}

/* === Traits === */

/* === Implementations === */

impl<A: Application> Clone for Recorded<A>
where
    A::Record: Clone,
{
    fn clone(&self) -> Self {
        match self {
            Self::Transaction(value) => Self::Transaction(Arc::clone(value)),
            Self::Record(value) => Self::Record(value.clone()),
            Self::System(value) => Self::System(value.clone()),
        }
    }
}

impl<A: Application> Recorded<A> {
    pub fn kind(&self) -> Kind {
        match self {
            Self::Transaction(_) => Kind::Transaction,
            Self::Record(_) => Kind::Record,
            Self::System(_) => Kind::Record,
        }
    }

    pub(crate) fn select<X: Clone + 'static>(&self) -> Option<X> {
        if let Some(value) = (self as &dyn Any).downcast_ref::<X>() {
            return Some(value.clone());
        }
        match self {
            Self::Transaction(value) => (&**value as &dyn Any).downcast_ref::<X>().cloned(),
            Self::Record(value) => (value as &dyn Any).downcast_ref::<X>().cloned(),
            Self::System(value) => (value as &dyn Any).downcast_ref::<X>().cloned(),
        }
    }
}

/* === Public Functions === */

/* === Private Functions === */

/* === Tests === */