How to specify onClose hooks execution order among plugins

[giovanni-bertoncelli]

💬 Question here

Is there any way to specify which onClose (or preClose) hooks from each plugin should be executed before the others? I have some plugins that rely on other main plugins in order to execute correctly their onClose hooks.

E.G.: Some plugins need the database plugin in order to perform some cleaning operations on the database before closing the server. If the database plugin gets torn down before the plugin, the database client results disconnected.

Your Environment

• node version: 20
• fastify version: >=4.23.2
• os: Mac

[climba03003]

Currently, no.
But I see the needs of this feature.

[giovanni-bertoncelli]

Thank you @climba03003

If when wrapping the plugin with fastify-plugin I specify some dependencies, these are respected only on server bootstrap or also on teardown? Or it does not change anything in the latter case?

[metcoder95]

It works on startup, not on teardown; the feature seems quite interesting, but it will require to creation of a graph of plugins for its dependency mapping.
I believe this can be implemented within fastify but its something that avvio might get some benefit from

[giovanni-bertoncelli]

Thank you @metcoder95. If this feature can be interesting, what would be the next steps?

[metcoder95]

A PR drafting the idea will be very welcomed

[giovanni-bertoncelli]

A PR drafting the idea will be very welcomed

Fastify or avvio?

[metcoder95]

I'd suggest fastify first but we can re-take it from there and evaluate where it might have more sense

[giovanni-bertoncelli]

Ok, maybe first I can file an issue in fastify? I have no idea where to start with the PR

[metcoder95]

Oh, good call; I thought we were in fastify, now I see we are on help, sorry. Let me transfer refer an issue there

[metcoder95]

Closing in favor of fastify/fastify#5375