@tableau/taco-toolkit
Version:
Tableau Connector Toolkit
132 lines • 8.86 kB
JavaScript
;
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) {
var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
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.");
while (g && (g = 0, op[0] && (_ = 0)), _) try {
if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
if (y = 0, t) op = [op[0] & 2, t.value];
switch (op[0]) {
case 0: case 1: t = op; break;
case 4: _.label++; return { value: op[1], done: false };
case 5: _.label++; y = op[1]; op = [0]; continue;
case 7: op = _.ops.pop(); _.trys.pop(); continue;
default:
if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
if (t[2]) _.ops.pop();
_.trys.pop(); continue;
}
op = body.call(thisArg, _);
} catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
}
};
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.PortManager = void 0;
var portscanner_1 = __importDefault(require("portscanner"));
var eps_logger_1 = require("../logging/eps-logger");
var PortManager = /** @class */ (function () {
function PortManager(start, end, reservedPorts) {
if (reservedPorts === void 0) { reservedPorts = []; }
this.start = start;
this.end = end;
this.reservedPorts = new Set(reservedPorts);
}
/**
* Returns an unused port within the given range and reserve it on the PortManager instance.
*/
PortManager.prototype.reserveUnusedPort = function () {
return __awaiter(this, void 0, void 0, function () {
var port;
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, this.getUnusedPort()];
case 1:
port = _a.sent();
this.reservedPorts.add(port);
return [2 /*return*/, port];
}
});
});
};
/**
* Returns an unused port within the given range.
*/
PortManager.prototype.getUnusedPort = function () {
return __awaiter(this, void 0, void 0, function () {
var attempts, port, status_1, err_1;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
attempts = 0;
_a.label = 1;
case 1:
if (!(attempts < PortManager.MAX_RETRIES)) return [3 /*break*/, 6];
port = void 0;
do {
port = this.getRandomPortNumber(this.start, this.end);
} while (this.reservedPorts.has(port));
attempts++;
_a.label = 2;
case 2:
_a.trys.push([2, 4, , 5]);
return [4 /*yield*/, portscanner_1.default.checkPortStatus(port)];
case 3:
status_1 = _a.sent();
if (status_1 === 'closed') {
eps_logger_1.Logger.info("Port ".concat(port, " is available - found after ").concat(attempts, " attempts"));
return [2 /*return*/, port];
}
return [3 /*break*/, 5];
case 4:
err_1 = _a.sent();
return [3 /*break*/, 1]; // Try another random port if check fails
case 5: return [3 /*break*/, 1];
case 6: throw new Error("Failed to find available port after ".concat(PortManager.MAX_RETRIES, " attempts in range: ").concat(this.start, "-").concat(this.end));
}
});
});
};
/**
* This function is designated to get reserved ports for EPS main services, so that
* extractors may skip these ports during start.
*
* It must be called after all EPS main services have started, e.g. static server,
* eps api, grpc server, etc. Otherwise, it could potentially cause race condition,
* since the port detection is async.
*/
PortManager.prototype.getReservedPorts = function () {
return Array.from(this.reservedPorts);
};
PortManager.prototype.getPortRange = function () {
return [this.start, this.end];
};
/**
* Get a random port number within [min, max] (both inclusively) without checking
* port availability.
*/
PortManager.prototype.getRandomPortNumber = function (min, max) {
return Math.floor(Math.random() * (max - min + 1)) + min;
};
PortManager.MAX_RETRIES = 10;
return PortManager;
}());
exports.PortManager = PortManager;
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