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events: set EventEmitterAsyncResource fields private #54889

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merged 1 commit into from
Sep 17, 2024
Merged

events: set EventEmitterAsyncResource fields private #54889

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36 changes: 12 additions & 24 deletions lib/events.js
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Original file line number Diff line number Diff line change
Expand Up @@ -67,7 +67,6 @@ const {
AbortError,
codes: {
ERR_INVALID_ARG_TYPE,
ERR_INVALID_THIS,
ERR_UNHANDLED_ERROR,
},
genericNodeError,
Expand Down Expand Up @@ -106,9 +105,9 @@ function lazyEventEmitterAsyncResource() {
AsyncResource,
} = require('async_hooks');

const kEventEmitter = Symbol('kEventEmitter');
const kAsyncResource = Symbol('kAsyncResource');
class EventEmitterReferencingAsyncResource extends AsyncResource {
#eventEmitter;

/**
* @param {EventEmitter} ee
* @param {string} [type]
Expand All @@ -119,21 +118,21 @@ function lazyEventEmitterAsyncResource() {
*/
constructor(ee, type, options) {
super(type, options);
this[kEventEmitter] = ee;
this.#eventEmitter = ee;
}

/**
* @type {EventEmitter}
*/
get eventEmitter() {
if (this[kEventEmitter] === undefined)
throw new ERR_INVALID_THIS('EventEmitterReferencingAsyncResource');
return this[kEventEmitter];
return this.#eventEmitter;
}
}

EventEmitterAsyncResource =
class EventEmitterAsyncResource extends EventEmitter {
#asyncResource;

/**
* @param {{
* name?: string,
Expand All @@ -154,8 +153,7 @@ function lazyEventEmitterAsyncResource() {
}
super(options);

this[kAsyncResource] =
new EventEmitterReferencingAsyncResource(this, name, options);
this.#asyncResource = new EventEmitterReferencingAsyncResource(this, name, options);
}

/**
Expand All @@ -164,9 +162,7 @@ function lazyEventEmitterAsyncResource() {
* @returns {boolean}
*/
emit(event, ...args) {
if (this[kAsyncResource] === undefined)
throw new ERR_INVALID_THIS('EventEmitterAsyncResource');
const { asyncResource } = this;
const asyncResource = this.#asyncResource;
ArrayPrototypeUnshift(args, super.emit, this, event);
return ReflectApply(asyncResource.runInAsyncScope, asyncResource,
args);
Expand All @@ -176,36 +172,28 @@ function lazyEventEmitterAsyncResource() {
* @returns {void}
*/
emitDestroy() {
if (this[kAsyncResource] === undefined)
throw new ERR_INVALID_THIS('EventEmitterAsyncResource');
this.asyncResource.emitDestroy();
this.#asyncResource.emitDestroy();
}

/**
* @type {number}
*/
get asyncId() {
if (this[kAsyncResource] === undefined)
throw new ERR_INVALID_THIS('EventEmitterAsyncResource');
return this.asyncResource.asyncId();
return this.#asyncResource.asyncId();
}

/**
* @type {number}
*/
get triggerAsyncId() {
if (this[kAsyncResource] === undefined)
throw new ERR_INVALID_THIS('EventEmitterAsyncResource');
return this.asyncResource.triggerAsyncId();
return this.#asyncResource.triggerAsyncId();
}

/**
* @type {EventEmitterReferencingAsyncResource}
*/
get asyncResource() {
if (this[kAsyncResource] === undefined)
throw new ERR_INVALID_THIS('EventEmitterAsyncResource');
return this[kAsyncResource];
return this.#asyncResource;
}
};
}
Expand Down
10 changes: 4 additions & 6 deletions test/parallel/test-eventemitter-asyncresource.js
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Original file line number Diff line number Diff line change
Expand Up @@ -132,24 +132,22 @@ function makeHook(trackedTypes) {
]));
})().then(common.mustCall());

// Member methods ERR_INVALID_THIS
throws(
() => EventEmitterAsyncResource.prototype.emit(),
{ code: 'ERR_INVALID_THIS' }
{ name: 'TypeError', message: /Cannot read private member/ }
);

throws(
() => EventEmitterAsyncResource.prototype.emitDestroy(),
{ code: 'ERR_INVALID_THIS' }
{ name: 'TypeError', message: /Cannot read private member/ }
);

['asyncId', 'triggerAsyncId', 'asyncResource'].forEach((getter) => {
throws(
() => Reflect.get(EventEmitterAsyncResource.prototype, getter, {}),
{
code: 'ERR_INVALID_THIS',
name: /TypeError/,
message: 'Value of "this" must be of type EventEmitterAsyncResource',
name: 'TypeError',
message: /Cannot read private member/,
stack: new RegExp(`at get ${getter}`),
}
);
Expand Down
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