harmos-runtime 0.1.4

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 === */

/* === Imports === */

// Standard Library Imports

// Third Party Imports

// Local Imports
use super::*;

/* === Constants === */

/* === Macros === */

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

/* === Structs === */

/* === Enums === */

/* === Traits === */

/* === Implementations === */

impl OperationManager {
    pub fn cache_capacity(&self) -> usize {
        self.registry.state.lock().expect("operation registry lock is healthy").cache_capacity
    }

    pub fn set_cache_capacity(&self, capacity: usize) {
        let retired = {
            let mut state = self.registry.state.lock().expect("operation registry lock is healthy");
            state.cache_capacity = capacity;
            state.evict_to(capacity)
        };
        drop(retired);
    }

    pub fn clear_cache(&self) {
        let retired = std::mem::take(&mut self.registry.state.lock().expect("operation registry lock is healthy").cache);
        drop(retired);
    }

    pub fn invalidate<O: OperationDeclaration>(&self, key: &CacheKey) -> Result<()> {
        let entry = self.entry(O::ID)?;
        self.invalidate_entry(&entry, key);
        Ok(())
    }

    pub fn invalidate_from<O: OperationDeclaration>(&self, owner: &str, key: &CacheKey) -> Result<()> {
        let entry = self.capture_provider(O::ID, Some(owner))?;
        entry.available()?;
        self.invalidate_entry(&entry, key);
        Ok(())
    }

    pub(super) fn invalidate_entry(&self, entry: &Arc<Entry>, key: &CacheKey) {
        let retired = self
            .registry
            .state
            .lock()
            .expect("operation registry lock is healthy")
            .remove_cache(|cached| cached.key == *key && cached.target.upgrade().is_some_and(|target| Arc::ptr_eq(&target, entry)));
        drop(retired);
    }

    pub(in crate::operations) fn lookup<O: OperationDeclaration>(
        &self, entry: &Arc<Entry>, key: &CacheKey, identity: &Identity,
    ) -> Option<crate::operations::Response<O::Response>> {
        let mut state = self.registry.state.lock().expect("operation registry lock is healthy");
        if state.closing || entry.available().is_err() {
            return None;
        }
        let index = state.cache.iter().position(|cached| {
            cached.key == *key
                && cached.identity == *identity
                && cached.target.upgrade().is_some_and(|target| Arc::ptr_eq(&target, entry) && target.generation == entry.generation)
        })?;
        let cached = state.cache.remove(index)?;
        let response = cached.response.clone().restore::<O::Response>();
        state.cache.push_back(cached);
        response
    }
}

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

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

/* === Tests === */