Function spirit::helpers::cfg_store

pub fn cfg_store<S, O, C>(storage: S) -> impl Helper<O, C>where
    S: Borrow<ArcSwap<C>> + Send + Sync + 'static,
    C: DeserializeOwned + Send + Sync + 'static,
    O: Debug + StructOpt + Sync + Send + 'static,

A helper to store configuration to some global-ish storage.

This makes sure every time a new config is loaded, it is made available inside the passed parameter. Therefore, places without direct access to the Spirit itself can look into the configuration.

The parameter can be a lot of things, but usually:

• Arc<ArcSwap<C>>.
• A reference to global ArcSwap<C> (for example inside lazy_static or once_cell).

Examples

#[macro_use]
extern crate lazy_static;
extern crate spirit;

use std::sync::Arc;

use spirit::{ArcSwap, Empty, Spirit};
use spirit::helpers;

lazy_static! {
    static ref CFG: ArcSwap<Empty> = ArcSwap::from(Arc::new(Empty {}));
}

Spirit::<Empty, Empty>::new()
    // Will make sure CFG contains the newest config
    .with(helpers::cfg_store(&*CFG))
    .build(false);