redis-smq
Version:
A high-performance, reliable, and scalable message queue for Node.js.
58 lines • 1.85 kB
JavaScript
function isDisposable(disposable) {
return (!!disposable &&
typeof disposable === 'object' &&
'shutdown' in disposable &&
typeof disposable.shutdown === 'function');
}
export class ComponentRegistry {
static components = new Set();
static track(instance) {
if (isDisposable(instance)) {
ComponentRegistry.components.add(instance);
}
return instance;
}
static untrack(component) {
return ComponentRegistry.components.delete(component);
}
static shutdownComponents(cb) {
const toShutdown = Array.from(ComponentRegistry.components);
if (toShutdown.length === 0) {
return cb();
}
let pending = toShutdown.length;
let firstErr = null;
toShutdown.forEach((component) => {
try {
component.shutdown((err) => {
if (err && !firstErr) {
firstErr = err;
}
ComponentRegistry.components.delete(component);
if (--pending === 0) {
cb(firstErr || null);
}
});
}
catch (syncError) {
if (!firstErr && syncError instanceof Error) {
firstErr = syncError;
}
ComponentRegistry.components.delete(component);
if (--pending === 0) {
cb(firstErr || null);
}
}
});
}
static clear() {
ComponentRegistry.components.clear();
}
static get size() {
return ComponentRegistry.components.size;
}
static has(component) {
return ComponentRegistry.components.has(component);
}
}
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