tgrid
Version:
Grid Computing Framework for TypeScript
334 lines • 15.8 kB
JavaScript
"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; }) ||
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 __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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}
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.SharedWorkerConnector = void 0;
var tstl_1 = require("tstl");
var ConnectorBase_1 = require("../internal/ConnectorBase");
var IHeaderWrapper_1 = require("../internal/IHeaderWrapper");
var once_1 = require("../internal/once");
var WebWorkerCompiler_1 = require("./internal/WebWorkerCompiler");
/**
* SharedWorker Connector
*
* - available only in the Web Browser.
*
* The `SharedWorkerConnector` is a communicator class which connects to an
* `SharedWorker` instance, and interacts with it through RFC (Remote Function Call)
* concept.
*
* You can connect to the {@link SharedWorkerServer} using {@link connect} method.
* The interaction would be started if the server accepts your connection by calling
* the {@link SharedWorkerAcceptor.accept} method. If the remote server rejects your
* connection through {@link SharedWorkerAcceptor.reject} method, the exception
* would be thrown.
*
* After the connection, don't forget to {@link closing} the connection, if your
* business logics have been completed, to clean up the resources. Otherwise, the
* closing must be performed by the remote shared worker server, you can wait the
* remote server's closing signal through the {@link join} method.
*
* Also, when declaring this `SharedWorkerConnector` type, you've to define three
* generic arguments; `Header`, `Provider` and `Remote`. Those generic arguments must
* be same with the ones defined in the target {@link WebSocketServer} and
* {@link SharedWorkerAcceptor} classes (`Provider` and `Remote` must be reversed).
*
* For reference, the first `Header` type represents an initial data from the
* remote client after the connection. I recommend utilize it as an activation tool
* for security enhancement. The second generic argument `Provider` represents a
* provider from client to server, and the other `Remote` means a provider from the
* remote server to client.
*
* @template Header Type of the header containing initial data.
* @template Provider Type of features provided for the remote server.
* @template Remote Type of features supported by remote server.
*/
var SharedWorkerConnector = /** @class */ (function (_super) {
__extends(SharedWorkerConnector, _super);
function SharedWorkerConnector() {
return _super !== null && _super.apply(this, arguments) || this;
}
/* ----------------------------------------------------------------
CONNECTIONS
---------------------------------------------------------------- */
/**
* Connect to remote server.
*
* The {@link connect}() method tries to connect an `SharedWorker` instance. If the
* `SharedWorker` instance is not created yet, the `SharedWorker` instance would be newly
* created. After the creation, the `SharedWorker` program must open that server using
* the {@link SharedWorkerServer.open}() method.
*
* After you business has been completed, you've to close the `SharedWorker` using one of
* them below. If you don't close that, vulnerable memory usage and communication channel
* would not be destroyed and it may cause the memory leak:
*
* - {@link close}()
* - {@link ShareDWorkerAcceptor.close}()
* - {@link SharedWorkerServer.close}()
*
* @param jsFile JS File to be {@link SharedWorkerServer}.
* @param options Detailed options like timeout.
*/
SharedWorkerConnector.prototype.connect = function (jsFile_1) {
return __awaiter(this, arguments, void 0, function (jsFile, options) {
var at, worker, last, reject, exp_1;
if (options === void 0) { options = {}; }
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
// TEST CONDITION
if (this.port_ && this.state_ !== 3 /* SharedWorkerConnector.State.CLOSED */) {
if (this.state_ === 0 /* SharedWorkerConnector.State.CONNECTING */)
throw new Error("Error on SharedWorkerConnector.connect(): on connecting.");
else if (this.state_ === 1 /* SharedWorkerConnector.State.OPEN */)
throw new Error("Error on SharedWorkerConnector.connect(): already connected.");
else
throw new Error("Error on SharedWorkerConnector.connect(): closing.");
}
at = options.timeout !== undefined
? new Date(Date.now() + options.timeout)
: undefined;
// SET CURRENT STATE
this.state_ = 0 /* SharedWorkerConnector.State.CONNECTING */;
_a.label = 1;
case 1:
_a.trys.push([1, 4, , 5]);
worker = new SharedWorker(jsFile);
this.port_ = worker.port;
return [4 /*yield*/, this._Handshake(options.timeout, at)];
case 2:
// WAIT THE WORKER TO BE READY
if ((_a.sent()) !==
0 /* SharedWorkerConnector.State.CONNECTING */)
throw new Error("Error on SharedWorkerConnector.connect(): target shared-worker may not be opened by TGrid. It's not following the TGrid's own handshake rule when connecting.");
// SEND HEADERS
this.port_.postMessage(JSON.stringify(IHeaderWrapper_1.IHeaderWrapper.wrap(this.header)));
return [4 /*yield*/, this._Handshake(options.timeout, at)];
case 3:
last = _a.sent();
if (last === 1 /* SharedWorkerConnector.State.OPEN */) {
// ACCEPTED
this.state_ = 1 /* SharedWorkerConnector.State.OPEN */;
this.port_.onmessage = this._Handle_message.bind(this);
this.port_.onmessageerror = function () { };
}
else {
reject = null;
try {
reject = JSON.parse(last);
}
catch (_b) { }
if (reject &&
reject.name === "reject" &&
typeof reject.message === "string")
throw new Error(reject.message);
else
throw new Error("Error on SharedWorkerConnector.connect(): target shared-worker may not be opened by TGrid. It's not following the TGrid's own handshake rule.");
}
return [3 /*break*/, 5];
case 4:
exp_1 = _a.sent();
try {
if (this.port_)
this.port_.close();
}
catch (_c) { }
this.state_ = -1 /* SharedWorkerConnector.State.NONE */;
throw exp_1;
case 5: return [2 /*return*/];
}
});
});
};
/**
* @hidden
*/
SharedWorkerConnector.prototype._Handshake = function (timeout, at) {
var _this = this;
return new Promise(function (resolve, reject) {
var completed = false;
var expired = false;
if (at !== undefined)
(0, tstl_1.sleep_until)(at).then(function () {
if (completed === false) {
reject(new Error("Error on SharedWorkerConnector.connect(): target shared-worker is not sending handshake data over ".concat(timeout, " milliseconds.")));
expired = true;
}
});
_this.port_.onmessage = (0, once_1.once)(function (evt) {
if (expired === false) {
completed = true;
resolve(evt.data);
}
});
});
};
/**
* @inheritDoc
*/
SharedWorkerConnector.prototype.close = function () {
return __awaiter(this, void 0, void 0, function () {
var error, ret;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
error = this.inspectReady("close");
if (error)
throw error;
ret = this.join();
// REQUEST CLOSE TO SERVER
this.state_ = 2 /* SharedWorkerConnector.State.CLOSING */;
this.port_.postMessage(2 /* SharedWorkerConnector.State.CLOSING */);
// LAZY RETURN
return [4 /*yield*/, ret];
case 1:
// LAZY RETURN
_a.sent();
return [2 /*return*/];
}
});
});
};
/* ----------------------------------------------------------------
COMMUNICATOR
---------------------------------------------------------------- */
/**
* @hidden
*/
SharedWorkerConnector.prototype.sendData = function (invoke) {
return __awaiter(this, void 0, void 0, function () {
return __generator(this, function (_a) {
this.port_.postMessage(JSON.stringify(invoke));
return [2 /*return*/];
});
});
};
/**
* @hidden
*/
SharedWorkerConnector.prototype._Handle_message = function (evt) {
if (evt.data === 2 /* SharedWorkerConnector.State.CLOSING */)
this._Handle_close();
// RFC OR REJECT
else {
var data = JSON.parse(evt.data);
this.replyData(data);
}
};
/**
* @hidden
*/
SharedWorkerConnector.prototype._Handle_close = function () {
return __awaiter(this, void 0, void 0, function () {
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, this.destructor()];
case 1:
_a.sent();
this.state_ = 3 /* SharedWorkerConnector.State.CLOSED */;
return [2 /*return*/];
}
});
});
};
return SharedWorkerConnector;
}(ConnectorBase_1.ConnectorBase));
exports.SharedWorkerConnector = SharedWorkerConnector;
/**
*
*/
(function (SharedWorkerConnector) {
/**
* Compile JS source code.
*
* @param content Source code
* @return Temporary URL.
*/
function compile(content) {
return __awaiter(this, void 0, void 0, function () {
var compile;
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, (0, WebWorkerCompiler_1.WebWorkerCompiler)()];
case 1:
compile = (_a.sent()).compile;
return [2 /*return*/, compile(content)];
}
});
});
}
SharedWorkerConnector.compile = compile;
/**
* Remove compiled JS file.
*
* @param url Temporary URL.
*/
function remove(url) {
return __awaiter(this, void 0, void 0, function () {
var remove;
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, (0, WebWorkerCompiler_1.WebWorkerCompiler)()];
case 1:
remove = (_a.sent()).remove;
return [4 /*yield*/, remove(url)];
case 2:
_a.sent();
return [2 /*return*/];
}
});
});
}
SharedWorkerConnector.remove = remove;
})(SharedWorkerConnector || (exports.SharedWorkerConnector = SharedWorkerConnector = {}));
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