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Просмотр файла: RequestManager.js
"use strict";
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 (_) 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 };
}
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.defaultNextRequest = void 0;
var events_1 = require("events");
exports.defaultNextRequest = function () {
var lastId = -1;
return function () { return ++lastId; };
};
/*
** Naive Request Manager, only use 1st transport.
* A more complex request manager could try each transport.
* If a transport fails, or times out, move on to the next.
*/
var RequestManager = /** @class */ (function () {
function RequestManager(transports, nextID) {
if (nextID === void 0) { nextID = exports.defaultNextRequest(); }
this.batch = [];
this.batchStarted = false;
this.lastId = -1;
this.transports = transports;
this.requests = {};
this.connectPromise = this.connect();
this.requestChannel = new events_1.EventEmitter();
this.nextID = nextID;
}
RequestManager.prototype.connect = function () {
var _this = this;
return Promise.all(this.transports.map(function (transport) { return __awaiter(_this, void 0, void 0, function () {
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
transport.subscribe("error", this.handleError.bind(this));
transport.subscribe("notification", this.handleNotification.bind(this));
return [4 /*yield*/, transport.connect()];
case 1:
_a.sent();
return [2 /*return*/];
}
});
}); }));
};
RequestManager.prototype.getPrimaryTransport = function () {
return this.transports[0];
};
RequestManager.prototype.request = function (requestObject, notification, timeout) {
if (notification === void 0) { notification = false; }
return __awaiter(this, void 0, void 0, function () {
var internalID, id, payload, result;
var _this = this;
return __generator(this, function (_a) {
internalID = this.nextID().toString();
id = notification ? null : internalID;
payload = { request: this.makeRequest(requestObject.method, requestObject.params || [], id), internalID: internalID };
if (this.batchStarted) {
result = new Promise(function (resolve, reject) {
_this.batch.push({ resolve: resolve, reject: reject, request: payload });
});
return [2 /*return*/, result];
}
return [2 /*return*/, this.getPrimaryTransport().sendData(payload, timeout)];
});
});
};
RequestManager.prototype.close = function () {
this.requestChannel.removeAllListeners();
this.transports.forEach(function (transport) {
transport.unsubscribe();
transport.close();
});
};
/**
* Begins a batch call by setting the [[RequestManager.batchStarted]] flag to `true`.
*
* [[RequestManager.batch]] is a singleton - only one batch can exist at a given time, per [[RequestManager]].
*
*/
RequestManager.prototype.startBatch = function () {
this.batchStarted = true;
};
RequestManager.prototype.stopBatch = function () {
if (this.batchStarted === false) {
throw new Error("cannot end that which has never started");
}
if (this.batch.length === 0) {
this.batchStarted = false;
return;
}
this.getPrimaryTransport().sendData(this.batch);
this.batch = [];
this.batchStarted = false;
};
RequestManager.prototype.makeRequest = function (method, params, id) {
if (id) {
return { jsonrpc: "2.0", id: id, method: method, params: params };
}
return { jsonrpc: "2.0", method: method, params: params };
};
RequestManager.prototype.handleError = function (data) {
this.requestChannel.emit("error", data);
};
RequestManager.prototype.handleNotification = function (data) {
this.requestChannel.emit("notification", data);
};
return RequestManager;
}());
exports.default = RequestManager;
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