@labset/task-pool-executor/dist/simple-task-pool-executor.js

task pool executor

"use strict";
var __extends = (this && this.__extends) || (function () {
    var extendStatics = function (d, b) {
        extendStatics = Object.setPrototypeOf ||
            ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
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        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 __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
    function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
    return new (P || (P = Promise))(function (resolve, reject) {
        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
        function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
        function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
        step((generator = generator.apply(thisArg, _arguments || [])).next());
    });
};
var __generator = (this && this.__generator) || function (thisArg, body) {
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    return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
    function verb(n) { return function (v) { return step([n, v]); }; }
    function step(op) {
        if (f) throw new TypeError("Generator is already executing.");
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};
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
exports.__esModule = true;
exports.SimpleTaskPoolExecutor = void 0;
var crypto_1 = require("crypto");
var events_1 = __importDefault(require("events"));
var SimpleTaskPoolExecutor = (function (_super) {
    __extends(SimpleTaskPoolExecutor, _super);
    function SimpleTaskPoolExecutor(props) {
        var _this = _super.call(this) || this;
        _this.maxConcurrent = props.maxConcurrent;
        _this.queue = [];
        _this.current = new Map();
        _this.on('release', _this._release);
        return _this;
    }
    SimpleTaskPoolExecutor.prototype._release = function (taskId) {
        this.current["delete"](taskId);
        var runnable = this.queue.shift();
        if (runnable) {
            this._execute((0, crypto_1.randomUUID)(), runnable);
        }
    };
    SimpleTaskPoolExecutor.prototype._execute = function (taskId, runnable, ctx) {
        var _this = this;
        var release = function (output) {
            _this.emit('release', taskId);
            return output;
        };
        this.current.set(taskId, runnable.run(ctx).then(release)["catch"](release));
        return taskId;
    };
    SimpleTaskPoolExecutor.prototype.submit = function (runnable, ctx) {
        var currentCount = this.current.size;
        if (currentCount < this.maxConcurrent) {
            this._execute((0, crypto_1.randomUUID)(), runnable, ctx);
        }
        else {
            this.queue.push(runnable);
        }
    };
    SimpleTaskPoolExecutor.prototype.close = function () {
        return __awaiter(this, void 0, void 0, function () {
            var result;
            return __generator(this, function (_a) {
                switch (_a.label) {
                    case 0:
                        this.queue.splice(0);
                        return [4, Promise.all(this.current.values())];
                    case 1:
                        result = _a.sent();
                        this.current.clear();
                        return [2, result];
                }
            });
        });
    };
    return SimpleTaskPoolExecutor;
}(events_1["default"]));
exports.SimpleTaskPoolExecutor = SimpleTaskPoolExecutor;