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async_hooks: add sync enterWith to ALS
This allows transitioning the entire following sync and async execution sub-tree to the given async storage context. With this one can be sure the context binding will remain for any following sync activity and all descending async execution whereas the `run*(...)` methods must wrap everything that is intended to exist within the context. This is helpful for scenarios such as prepending a `'connection'` event to an http server which binds everything that occurs within each request to the given context. This is helpful for APMs to minimize the need for patching and especially adding closures. PR-URL: #31945 Reviewed-By: Vladimir de Turckheim <vlad2t@hotmail.com> Reviewed-By: Matteo Collina <matteo.collina@gmail.com> Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
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Original file line number | Diff line number | Diff line change |
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@@ -0,0 +1,20 @@ | ||
'use strict'; | ||
require('../common'); | ||
const assert = require('assert'); | ||
const { AsyncLocalStorage } = require('async_hooks'); | ||
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const asyncLocalStorage = new AsyncLocalStorage(); | ||
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setImmediate(() => { | ||
const store = { foo: 'bar' }; | ||
asyncLocalStorage.enterWith(store); | ||
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assert.strictEqual(asyncLocalStorage.getStore(), store); | ||
setTimeout(() => { | ||
assert.strictEqual(asyncLocalStorage.getStore(), store); | ||
}, 10); | ||
}); | ||
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setTimeout(() => { | ||
assert.strictEqual(asyncLocalStorage.getStore(), undefined); | ||
}, 10); |