@directus/api/dist/bus/lib/use-bus.js

Directus is a real-time API and App dashboard for managing SQL database content

import { createBus } from '@directus/memory';
import { redisConfigAvailable, useRedis } from '../../redis/index.js';
export const _cache = {
    bus: undefined,
};
/**
 * Returns globally shared message bus. If Redis is available, will use a redis-driven pub/sub bus.
 * Otherwise will default to a local-only bus.
 */
export const useBus = () => {
    if (_cache.bus) {
        return _cache.bus;
    }
    if (redisConfigAvailable()) {
        _cache.bus = createBus({ type: 'redis', redis: useRedis(), namespace: 'directus:bus' });
    }
    else {
        _cache.bus = createBus({ type: 'local' });
    }
    return _cache.bus;
};