@opentelemetry/core/dist/utils/callback.mjs

OpenTelemetry Core provides constants and utilities shared by all OpenTelemetry SDK packages.

import { Deferred } from "./promise.mjs";
//#region src/utils/callback.ts
/**
* Bind the callback and only invoke the callback once regardless how many times `BindOnceFuture.call` is invoked.
*/
var BindOnceFuture = class {
	_isCalled = false;
	_deferred = new Deferred();
	_callback;
	_that;
	constructor(callback, that) {
		this._callback = callback;
		this._that = that;
	}
	get isCalled() {
		return this._isCalled;
	}
	get promise() {
		return this._deferred.promise;
	}
	call(...args) {
		if (!this._isCalled) {
			this._isCalled = true;
			try {
				Promise.resolve(this._callback.call(this._that, ...args)).then((val) => this._deferred.resolve(val), (err) => this._deferred.reject(err));
			} catch (err) {
				this._deferred.reject(err);
			}
		}
		return this._deferred.promise;
	}
};
//#endregion
export { BindOnceFuture };

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