aws-crt
Version:
NodeJS/browser bindings to the aws-c-* libraries
132 lines • 4.96 kB
JavaScript
;
/*
* Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
* SPDX-License-Identifier: Apache-2.0.
*/
var __extends = (this && this.__extends) || (function () {
var extendStatics = function (d, b) {
extendStatics = Object.setPrototypeOf ||
({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
function (d, b) { for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };
return extendStatics(d, b);
};
return function (d, b) {
if (typeof b !== "function" && b !== null)
throw new TypeError("Class extends value " + String(b) + " is not a constructor or null");
extendStatics(d, b);
function __() { this.constructor = d; }
d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
};
})();
var __read = (this && this.__read) || function (o, n) {
var m = typeof Symbol === "function" && o[Symbol.iterator];
if (!m) return o;
var i = m.call(o), r, ar = [], e;
try {
while ((n === void 0 || n-- > 0) && !(r = i.next()).done) ar.push(r.value);
}
catch (error) { e = { error: error }; }
finally {
try {
if (r && !r.done && (m = i["return"])) m.call(i);
}
finally { if (e) throw e.error; }
}
return ar;
};
var __spreadArray = (this && this.__spreadArray) || function (to, from, pack) {
if (pack || arguments.length === 2) for (var i = 0, l = from.length, ar; i < l; i++) {
if (ar || !(i in from)) {
if (!ar) ar = Array.prototype.slice.call(from, 0, i);
ar[i] = from[i];
}
}
return to.concat(ar || Array.prototype.slice.call(from));
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.BufferedEventEmitter = void 0;
/**
* Module for base types related to event emission
*
* @packageDocumentation
* @module event
*/
var events_1 = require("events");
/**
* @internal
*/
var BufferedEvent = /** @class */ (function () {
function BufferedEvent(event, args) {
this.event = event;
this.args = args;
}
return BufferedEvent;
}());
/**
* Provides buffered event emitting semantics, similar to many Node-style streams.
* Subclasses will override EventEmitter.on() and trigger uncorking.
* NOTE: It is HIGHLY recommended that uncorking should always be done via
* ```process.nextTick()```, not during the EventEmitter.on() call.
*
* See also: [Node writable streams](https://nodejs.org/api/stream.html#stream_writable_cork)
*
* @category Events
*/
var BufferedEventEmitter = /** @class */ (function (_super) {
__extends(BufferedEventEmitter, _super);
function BufferedEventEmitter() {
var _this = _super.call(this) || this;
_this.corked = false;
return _this;
}
/**
* Forces all written events to be buffered in memory. The buffered data will be
* flushed when {@link BufferedEventEmitter.uncork} is called.
*/
BufferedEventEmitter.prototype.cork = function () {
this.corked = true;
};
/**
* Flushes all data buffered since {@link BufferedEventEmitter.cork} was called.
*
* NOTE: It is HIGHLY recommended that uncorking should always be done via
* ``` process.nextTick```, not during the ```EventEmitter.on()``` call.
*/
BufferedEventEmitter.prototype.uncork = function () {
this.corked = false;
while (this.eventQueue) {
var event_1 = this.eventQueue;
_super.prototype.emit.apply(this, __spreadArray([event_1.event], __read(event_1.args), false));
this.eventQueue = this.eventQueue.next;
}
};
/**
* Synchronously calls each of the listeners registered for the event key supplied
* in registration order. If the {@link BufferedEventEmitter} is currently corked,
* the event will be buffered until {@link BufferedEventEmitter.uncork} is called.
* @param event The name of the event
* @param args Event payload
*/
BufferedEventEmitter.prototype.emit = function (event) {
var args = [];
for (var _i = 1; _i < arguments.length; _i++) {
args[_i - 1] = arguments[_i];
}
if (this.corked) {
// queue requests in order
var last = this.lastQueuedEvent;
this.lastQueuedEvent = new BufferedEvent(event, args);
if (last) {
last.next = this.lastQueuedEvent;
}
else {
this.eventQueue = this.lastQueuedEvent;
}
return this.listeners(event).length > 0;
}
return _super.prototype.emit.apply(this, __spreadArray([event], __read(args), false));
};
return BufferedEventEmitter;
}(events_1.EventEmitter));
exports.BufferedEventEmitter = BufferedEventEmitter;
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