Add defer Hook

Essentially it would take a hook function, and run it outside of the rest of the hooks - so that if an error occurs, it doesn’t break the request, or if it will potentially take a long time it won’t cause lags. Where I’ve used something like this is for analytics or low priority notifications.

Obviously you could just bake the functionality directly into the hook, but if you’re consuming 3rd party hooks, or have a hook you sometimes want to depend on, that wouldn’t work.

Is this common enough to be bundled into hooks-common / is there a pattern like this already for feathers?

I’m thinking something like this:

function defer(handler) {
  return function(hook) {
    setImmediate(() => handler.call(this, hook));
    return hook;
  }
}

app.service('users').after({
  create: [ defer(notify('User Created')) ]
});

Happy to make a PR

[eddyystop]

Thanks for this comment.

Work is being done on hooks for event filters and permissions. We’ll address this particular issue when that’s stabilized.

[eddyystop]

@bedeoverend I took the liberty of adding your (modified) defer hook as the first addition to the new feathers-community-hooks repo. I renamed it to runParallel. Feel free to modify it based on your experience.

I’d be delighted if you were able to contribute more hooks.

Thanks!