Synchronous Hooks

[abarke]

Synchronous Hooks

[Vinccool96]

If you're the one that added hookable as a dependency I created a package that is the same thing but only uses sync functions

[pi0]

Event Emitter is probably the closest (and best-optimized solution performance-wise - next to plain functions) for the sync method. sync-hookable also seems a good option thanks @Vinccool96!

Here are the options in summary:

• Use beforeEach/affterEach sync callbacks for logging (you can filter based on event name)
• Use an alternative like sync-hookable
• Use Node.js Event Emitter
• Use plain callback functions for simpler cases

[pi0]

All hookable internals are asynchronous. There are only interceptors you can add and are sync.

By the current code, I would use two simple callback options instead but if you can give more context of your project and usage can help better me understanding.

[abarke]

We are using the RxJS WebSocketSubject to handle asynchronous messages. However the serializer and deserializer in WebSocketSubjectConfig are synchronous functions. We added the hooks and it works fine, but we wanted to find out if we could make the hooks synchronous. Similar to how we call the other hooks with:

await hooks.callHook(Hook.SOME_HOOK, data)`. 

We currently just use these hooks for logging, so that works fine, however we were wondering if we can intercept the message using a hook to transform the incoming msg similar to a middleware pattern e.g.

function serializer(msg: Message): WebSocketMessage {
  const transformedMsg = hooks.callHookSync(Hook.BEFORE_SERIALIZED, msg)
  const serialized = serialize(transformedMsg)
  return hooks.callHookSync(Hook.SERIALIZED, serialized)
}