Method get_data_raw

crates/cache/src/lib.rs:181–219

Gets cached data if state matches, otherwise calls `compute`. If the cache is disabled or no cached data is found then `compute` is called to calculate the data. If the data was found in cache it is passed to `deserialize`, which if successful will be the returned value. When computed the `serialize` function is used to generate the bytes from the returned value.

(
        &self,
        state: &T,
        // NOTE: These are function pointers instead of closures so that they
        // don't accidentally close over something not accounted in the cache.
       

    /// When computed the `serialize` function is used to generate the bytes
    /// from the returned value.
    pub fn get_data_raw<T, U, E>(
        &self,
        state: &T,
        // NOTE: These are function pointers instead of closures so that they
        // don't accidentally close over something not accounted in the cache.
        compute: fn(&T) -> Result<U, E>,
        serialize: fn(&T, &U) -> Option<Vec<u8>>,
        deserialize: fn(&T, Vec<u8>) -> Option<U>,
    ) -> Result<U, E>
    where
        T: Hash,
    {
        let inner = match &self.0 {
            Some(inner) => inner,
            None => return compute(state),
        };

        let mut hasher = Sha256Hasher(Sha256::new());
        state.hash(&mut hasher);
        let hash: [u8; 32] = hasher.0.finalize().into();
        // standard encoding uses '/' which can't be used for filename
        let hash = base64::engine::general_purpose::URL_SAFE_NO_PAD.encode(&hash);

        if let Some(cached_val) = inner.get_data(&hash) {
            if let Some(val) = deserialize(state, cached_val) {
                let mod_cache_path = inner.root_path.join(&hash);
                inner.cache.on_cache_get_async(&mod_cache_path); // call on success
                return Ok(val);
            }
        }
        let val_to_cache = compute(state)?;
        if let Some(bytes) = serialize(state, &val_to_cache) {
            if inner.update_data(&hash, &bytes).is_some() {
                let mod_cache_path = inner.root_path.join(&hash);
                inner.cache.on_cache_update_async(&mod_cache_path); // call on success
            }
        }
        Ok(val_to_cache)
    }
}

impl<'cache> ModuleCacheEntryInner<'cache> {