Function configure 

pub fn configure(photon: Photon)

Configure the default Photon instance used by macro-generated convenience helpers (Type::publish() / Type::subscribe()).

Prefer passing an explicit Photon handle via publish_on / subscribe_on or Photon::publish. This process-wide shim is optional sugar for simple hosts.

Example

use std::sync::Arc;

use photon_core::JsonIdentityFactory;
use photon_runtime::{configure, Photon};

let photon = Photon::builder().auto_registry().build()?;
photon.start_executor(Arc::new(JsonIdentityFactory))?;
configure(photon);

Recovers from a poisoned lock so a prior panicking holder cannot brick configure.