async_hooks: stabilize part of AsyncLocalStorage #37675

vdeturckheim · 2021-03-09T14:09:18Z

This PR stabilizes part of the AsyncLocalStorage API.

The whole reasoning for chosing this subset of methods was discussed in #35286 (comment)

cc @bmeck @Qard @mhdawson @mcollina @bengl

mhdawson

LGTM

Flarna

There is still a Stability: 1 - Experimental on top for the whole module.

Maybe we should remove it there and add it instead at Class: AsyncHook and Class: AsyncResource?
Don't know who this is usually handled.

doc/api/async_hooks.md

mcollina

lgtm

vdeturckheim · 2021-03-10T16:17:34Z

There is still a Stability: 1 - Experimental on top for the whole module.
Maybe we should remove it there and add it instead at Class: AsyncHook and Class: AsyncResource?
Don't know who this is usually handled.

@Flarna , I don't either ^^ Maybe someone over @nodejs/documentation knows what's the best way to do it here?

mhdawson · 2021-03-10T20:03:04Z

@vdeturckheim what about creating new page2 for AsyncResouce and AsyncLocalStorage ?

I think that makes sense as they are each a unique concept/api (although related) on their own, and if for example we ended up deprecating the lower level async hooks they could still stand on their own.

I also think that would be less confusing in terms of what is experimental or not as well as being able to directly reference AsyncResouce

bmeck · 2021-03-10T21:26:29Z

I'm a little -0 on giving them their own import specifier / page. I think having all these diagnostic and power tools in a single place really lets the organization be closer to purpose rather than purely on API stability. I'm fine if a new page is done, but would be -1 on changing the import specifier unless there was a clearer checklist of what should cause such a change for other APIs in the future.

mhdawson · 2021-03-10T21:29:26Z

I was not suggesting changing the import specifier, just the organization of the docs.

Qard · 2021-03-10T23:53:22Z

👍 for splitting up the docs. If we're splitting the doc up here anyway, perhaps we should also include AsyncResource in the changes too while you're at it?

vdeturckheim · 2021-03-11T08:06:48Z

@Qard I don't have any problem with having AsyncResource in the PR too :)

@mhdawson good idea!

I'll update the PR

vdeturckheim · 2021-03-15T16:30:17Z

Trying to do it, should I just add a new page named async_context.md and titled "Asynchronous Context Tracking"?
wdyt @mhdawson @Qard ?

mhdawson · 2021-03-15T22:01:55Z

@vdeturckheim that sounds reasonable to me.

Qard · 2021-03-18T16:46:18Z

So both AsyncLocalStorage and AsyncResource on the same page? Makes sense to me. Might actually want to make it a bit more guide-like than some of the other pages, with extra front content explaining the use and caveats like context loss in more detail, then have the reference content follow.

vdeturckheim · 2021-03-19T14:02:53Z

I am converting the PR into a draft as I think there might be a couple back and forth until we find the right format for the split doc. @Qard @mhdawson here is a split proposal (with a few parts to finish ofc)

mhdawson · 2021-03-22T20:12:57Z

@vdeturckheim being split out looks good. I'm thinking it might make sense to put the AsyncLocalStorage part first as it seems like the simpler of the two, and one of the key reasons you need AsyncResource is to keep AsyncLocalStorage working properly in a subset of the cases so seems like a good thing to follow AsyncLocalStorage. WDYT? Just a suggestion as I'd be good either way once the TODO's are filled in.

vdeturckheim · 2021-03-25T15:41:45Z

@mhdawson agreed. I updated a bit. It should start to look good now.

Qard

Looks like a good start. A few thoughts:

Should AsyncLocalStorage and AsyncResource get separate pages, and related--should we aim to make them separate top-level modules eventually?

Should the requireManualDestroy option and emitDestroy method of AsyncResource remain experimental? They're perhaps a bit janky as far as features go, and one could draw some parallels to the unsafety of domains in there, though I'm not too worried about it. Perhaps just a warning about timing of the destroy?

For the intro, it would be good to elaborate on the relationship between AsyncLocalStorage on the consuming end and AsyncResource on the producing end of async context propagation semantics.

doc/api/async_context.md

Co-authored-by: Michaël Zasso <targos@protonmail.com> Co-authored-by: Andrey Pechkurov <37772591+puzpuzpuz@users.noreply.github.com>

Signed-off-by: Michael Dawson <mdawson@devrus.com>

mhdawson · 2021-05-26T00:20:27Z

Doc only, so full CI not required.

mhdawson · 2021-05-26T00:23:25Z

@bmeck @Qard @mcollina @bengl @vdeturckheim FYI as long as the github actions all pass I'll plan to land this tomorrow in case you want to take another look.

I think I've fixed up all the things I talked with @vdeturckheim about (unless there is more that the actions run which make test locally does not run).

mcollina · 2021-05-26T07:54:19Z

@mhdawson I think this is blocked by #38781. We should label this "stable" after we fix that regression.

mhdawson · 2021-05-26T13:00:41Z

@mcollina thanks for the heads up.

vdeturckheim · 2021-06-02T15:21:31Z

@mhdawson #38821 has landed :)

bl-ue

I had some comments on doc/api/async_context.md, but only after I had reviewed it and prepared them all did I realize that that page wasn't written in this PR, it was only moved. 😆 I'll submit my suggestions in a new PR once this is merged.

mcollina

lgtm

Mark AsyncLocalStorage constructor, AsyncLocalStorage.prototype.getStore(), and AsyncLocalStorage.prototype.run as stable. PR-URL: #37675 Reviewed-By: Bradley Farias <bradley.meck@gmail.com> Reviewed-By: Andrey Pechkurov <apechkurov@gmail.com> Reviewed-By: Michael Dawson <midawson@redhat.com> Reviewed-By: Stephen Belanger <admin@stephenbelanger.com> Reviewed-By: Matteo Collina <matteo.collina@gmail.com> Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Gerhard Stöbich <deb2001-github@yahoo.de> Reviewed-By: Chengzhong Wu <legendecas@gmail.com> Reviewed-By: Anna Henningsen <anna@addaleax.net> Reviewed-By: Bryan English <bryan@bryanenglish.com>

mhdawson · 2021-06-04T18:05:21Z

Landed in 7612d82

@vdeturckheim thanks for all your work on this.

Mark AsyncLocalStorage constructor, AsyncLocalStorage.prototype.getStore(), and AsyncLocalStorage.prototype.run as stable. PR-URL: #37675 Reviewed-By: Bradley Farias <bradley.meck@gmail.com> Reviewed-By: Andrey Pechkurov <apechkurov@gmail.com> Reviewed-By: Michael Dawson <midawson@redhat.com> Reviewed-By: Stephen Belanger <admin@stephenbelanger.com> Reviewed-By: Matteo Collina <matteo.collina@gmail.com> Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Gerhard Stöbich <deb2001-github@yahoo.de> Reviewed-By: Chengzhong Wu <legendecas@gmail.com> Reviewed-By: Anna Henningsen <anna@addaleax.net> Reviewed-By: Bryan English <bryan@bryanenglish.com>

Notable changes: * async_hooks: * stabilize part of AsyncLocalStorage (Vladimir de Turckheim) #37675 * deps: * upgrade npm to 7.18.1 (npm-robot) #39065 * update V8 to 9.1.269.36 (Michaël Zasso) #38273 * dns: * allow `--dns-result-order` to change default dns verbatim (Ouyang Yadong) #38099

PR-URL: #39031 Notable changes: * async_hooks: * stabilize part of AsyncLocalStorage (Vladimir de Turckheim) #37675 * deps: * upgrade npm to 7.18.1 (npm-robot) #39065 * update V8 to 9.1.269.36 (Michaël Zasso) #38273 * dns: * allow `--dns-result-order` to change default dns verbatim (Ouyang Yadong) #38099

Notable changes: * async_hooks: * stabilize part of AsyncLocalStorage (Vladimir de Turckheim) #37675 * deps: * upgrade npm to 7.18.1 (npm-robot) #39065 * update V8 to 9.1.269.36 (Michaël Zasso) #38273 * dns: * allow `--dns-result-order` to change default dns verbatim (Ouyang Yadong) #38099 PR-URL: #39031

nodejs-github-bot added async_hooks Issues and PRs related to the async hooks subsystem. doc Issues and PRs related to the documentations. labels Mar 9, 2021

vdeturckheim requested review from puzpuzpuz and Qard March 9, 2021 14:09

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Mongodb breaks AsyncLocalStorage context spread nodejs/help#3186

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vdeturckheim marked this pull request as draft March 19, 2021 14:02

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vdeturckheim and others added 4 commits May 25, 2021 19:57

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Co-authored-by: Michaël Zasso <targos@protonmail.com> Co-authored-by: Andrey Pechkurov <37772591+puzpuzpuz@users.noreply.github.com>

lint fix

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Signed-off-by: Michael Dawson <mdawson@devrus.com>

squash: fix error reported only in doc-only

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Signed-off-by: Michael Dawson <mdawson@devrus.com>

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Node.js Diagnostics WorkGroup Meeting 2021-06-02 nodejs/diagnostics#479

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v16.4.0 proposal #39031

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Proposal: mark AsyncResource and AsyncLocalStorage as stable #35286

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AsyncLocalStorage without Async Hooks #46265

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async_hooks: stabilize part of AsyncLocalStorage #37675

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