metaapi.cloud-sdk
Version:
SDK for MetaApi, a professional cloud forex API which includes MetaTrader REST API and MetaTrader websocket API. Supports both MetaTrader 5 (MT5) and MetaTrader 4 (MT4). CopyFactory copy trading API included. (https://metaapi.cloud)
215 lines (214 loc) • 25.7 kB
JavaScript
function asyncGeneratorStep(gen, resolve, reject, _next, _throw, key, arg) {
try {
var info = gen[key](arg);
var value = info.value;
} catch (error) {
reject(error);
return;
}
if (info.done) {
resolve(value);
} else {
Promise.resolve(value).then(_next, _throw);
}
}
function _async_to_generator(fn) {
return function() {
var self = this, args = arguments;
return new Promise(function(resolve, reject) {
var gen = fn.apply(self, args);
function _next(value) {
asyncGeneratorStep(gen, resolve, reject, _next, _throw, "next", value);
}
function _throw(err) {
asyncGeneratorStep(gen, resolve, reject, _next, _throw, "throw", err);
}
_next(undefined);
});
};
}
function _define_property(obj, key, value) {
if (key in obj) {
Object.defineProperty(obj, key, {
value: value,
enumerable: true,
configurable: true,
writable: true
});
} else {
obj[key] = value;
}
return obj;
}
import randomstring from 'randomstring';
import * as lrap from '../long-running-async-process';
import StickySocketConnection from './stickySocketConnection';
import * as errors from '../../clients/errorHandler';
import { destroyInternalClientSocket } from './common.utils';
import { msToSeconds } from '../../helpers/convert/time';
import EventEmitter from '../../tools/eventEmitter';
import LoggerManager from '../../logger';
import Queue from '../../tools/queue';
/**
* Client sticky socket
*/ let ClientStickySocket = class ClientStickySocket extends EventEmitter {
/**
* Returns socket ID
* @returns socket ID
*/ get id() {
return this._id;
}
/**
* Returns current native socket
* @returns socket.io socket
* @internal intended for tests only
*/ get socket() {
var _this__pool_getProcess;
return (_this__pool_getProcess = this._pool.getProcess('connection')) === null || _this__pool_getProcess === void 0 ? void 0 : _this__pool_getProcess.socket;
}
/**
* Returns current transport name, using socket.io internals
* @returns transport name, e.g. "websocket"
* @internal intended for tests only
*/ get transportName() {
var _this__pool_getProcess;
return (_this__pool_getProcess = this._pool.getProcess('connection')) === null || _this__pool_getProcess === void 0 ? void 0 : _this__pool_getProcess.transportName;
}
/**
* Returns first present packet index in last emit history
* @returns first history index
* @internal intended for tests only
*/ get firstHistoryIndex() {
var _this__pool_getProcess;
return (_this__pool_getProcess = this._pool.getProcess('connection')) === null || _this__pool_getProcess === void 0 ? void 0 : _this__pool_getProcess.firstHistoryIndex;
}
/**
* Returns whether socket connected
* @returns is connected
*/ get connected() {
return this._connected;
}
/**
* @inheritdoc
* @remarks Socket events `ClientStickySockets.INTERNAL_EVENTS` cannot be subscribed to
* @throws `ValidationError` if attempting to subscribe to an internal event
*/ on(event, callback) {
if (ClientStickySocket.INTERNAL_EVENTS.includes(event)) {
throw new errors.ValidationError('Cannot subscribe to an internal event');
}
super.on(event, callback);
}
/**
* Emits a data event. All events are buffered if no connection
* @param event The event that we're emitting
* @param args Optional arguments to send with the event
*/ send(event, ...args) {
var _this__pool_getProcess;
(_this__pool_getProcess = this._pool.getProcess('connection')) === null || _this__pool_getProcess === void 0 ? void 0 : _this__pool_getProcess.send(event, ...args);
}
/**
* Disconnects socket
* @param err error if disconnecting with error
* @returns promise resolving when disconnected
*/ disconnect(err) {
var _this = this;
return _async_to_generator(function*() {
clearTimeout(_this._stickyConnectionWaitTimeout);
let wasStopped = _this._stopped;
_this._stopped = true;
yield _this._pool.stop();
if (!wasStopped) {
_this._connected = false;
_this.emit('disconnect', err);
}
})();
}
/**
* Destroys underlying socket, using socket.io internals. The socket must have `websocket` transport
* @param err optional error
* @internal intended for tests only, e.g. to test connection loss
*/ destroyInternalSocket(err) {
destroyInternalClientSocket(this._pool.getProcess('connection').socket, err);
}
/**
* Removes expired emit history
* @internal intended for tests only
*/ removeExpiredEmitHistory() {
var _this__pool_getProcess;
(_this__pool_getProcess = this._pool.getProcess('connection')) === null || _this__pool_getProcess === void 0 ? void 0 : _this__pool_getProcess.removeExpiredEmitHistory();
}
/**
* Constructs instance
* @param url URL
* @param options options
*/ constructor(url, options){
super();
_define_property(this, "_logger", LoggerManager.getLogger('ClientStickySocket'));
_define_property(this, "_pool", void 0);
_define_property(this, "_stickyConnectionWaitTimeout", void 0);
_define_property(this, "_id", randomstring.generate(16));
_define_property(this, "_label", void 0);
_define_property(this, "_stopped", false);
_define_property(this, "_connected", false);
this._label = `${(options === null || options === void 0 ? void 0 : options.label) || 'connection'}:${this._id}`;
var _options_stickyConnectionTtlInSeconds;
const stickyConnectionTtlInMs = 1000 * ((_options_stickyConnectionTtlInSeconds = options === null || options === void 0 ? void 0 : options.stickyConnectionTtlInSeconds) !== null && _options_stickyConnectionTtlInSeconds !== void 0 ? _options_stickyConnectionTtlInSeconds : 10);
let internalEvents = new EventEmitter();
internalEvents.once('connect', ()=>{
this._connected = true;
this.emit('connect');
});
internalEvents.on('connect', ()=>clearTimeout(this._stickyConnectionWaitTimeout));
internalEvents.on('fail', (err)=>{
if (options === null || options === void 0 ? void 0 : options.useNativeSocketIoServer) {
this.disconnect(err);
return;
}
if (!this._stopped) {
this._stickyConnectionWaitTimeout = setTimeout(()=>{
this._logger.warn(`${this._label}: failed to restore sticky connection`);
this.disconnect(err);
}, stickyConnectionTtlInMs);
}
});
this._pool = new lrap.RootPool(StickySocketConnection, {
dependencies: [
this,
internalEvents
],
label: `clientStickySocket:${this._label}`
});
var _options_emitHistoryTtlInSeconds, _options_reconnectionDelayInMs, _options_reconnectionDelayMaxInMs, _options_reconnectionRandomizationFactor;
this._pool.scheduleProcess('connection', {
args: [
url,
this._id,
{
startCount: 0,
emitHistory: new Queue(),
lastSentIndex: -1,
lastReceivedIndex: -1
},
{
label: this._label,
connection: options === null || options === void 0 ? void 0 : options.connection,
useNativeSocketIoServer: options === null || options === void 0 ? void 0 : options.useNativeSocketIoServer,
emitHistoryTtlInSeconds: (_options_emitHistoryTtlInSeconds = options === null || options === void 0 ? void 0 : options.emitHistoryTtlInSeconds) !== null && _options_emitHistoryTtlInSeconds !== void 0 ? _options_emitHistoryTtlInSeconds : msToSeconds(stickyConnectionTtlInMs)
}
],
failoverThrottleDelay: {
mode: 'exponential',
resetDelayInMs: 0,
minDelayInMs: (_options_reconnectionDelayInMs = options === null || options === void 0 ? void 0 : options.reconnectionDelayInMs) !== null && _options_reconnectionDelayInMs !== void 0 ? _options_reconnectionDelayInMs : 1000,
maxDelayInMs: (_options_reconnectionDelayMaxInMs = options === null || options === void 0 ? void 0 : options.reconnectionDelayMaxInMs) !== null && _options_reconnectionDelayMaxInMs !== void 0 ? _options_reconnectionDelayMaxInMs : 10000,
randomizationFactor: (_options_reconnectionRandomizationFactor = options === null || options === void 0 ? void 0 : options.reconnectionRandomizationFactor) !== null && _options_reconnectionRandomizationFactor !== void 0 ? _options_reconnectionRandomizationFactor : 0.5
}
});
}
};
(function(ClientStickySocket) {
/** Connection events */ ClientStickySocket.CONNECTION_EVENTS = StickySocketConnection.CONNECTION_EVENTS;
/** Internal events */ ClientStickySocket.INTERNAL_EVENTS = StickySocketConnection.INTERNAL_EVENTS;
})(ClientStickySocket || (ClientStickySocket = {}));
export default ClientStickySocket;
//# sourceMappingURL=data:application/json;base64,{"version":3,"sources":["<anon>"],"sourcesContent":["import randomstring from 'randomstring';\nimport * as lrap from '../long-running-async-process';\nimport StickySocketConnection from './stickySocketConnection';\nimport * as errors from '../../clients/errorHandler';\nimport {destroyInternalClientSocket} from './common.utils';\nimport {msToSeconds} from '../../helpers/convert/time';\nimport EventEmitter from '../../tools/eventEmitter';\nimport LoggerManager from '../../logger';\nimport Queue from '../../tools/queue';\n\n/**\n * Client sticky socket\n */\nclass ClientStickySocket extends EventEmitter<ClientStickySocket.Events> {\n\n  private _logger = LoggerManager.getLogger('ClientStickySocket');\n  private _pool: lrap.RootPool<StickySocketConnection>;\n  private _stickyConnectionWaitTimeout?: NodeJS.Timeout;\n  private _id = randomstring.generate(16);\n  private _label: string;\n  private _stopped = false;\n  private _connected = false;\n\n  /**\n   * Constructs instance\n   * @param url URL\n   * @param options options\n   */\n  constructor(url: string, options?: ClientStickySocket.Options) {\n    super();\n    this._label = `${options?.label || 'connection'}:${this._id}`;\n    \n    const stickyConnectionTtlInMs = 1000 * (options?.stickyConnectionTtlInSeconds ?? 10);\n    let internalEvents = new EventEmitter<StickySocketConnection.SharedEvents>();\n    internalEvents.once('connect', () => {\n      this._connected = true;\n      this.emit('connect');\n    });\n    internalEvents.on('connect', () => clearTimeout(this._stickyConnectionWaitTimeout));\n    internalEvents.on('fail', err => {\n      if (options?.useNativeSocketIoServer) {\n        this.disconnect(err);\n        return;\n      }\n      if (!this._stopped) {\n        this._stickyConnectionWaitTimeout = setTimeout(() => {\n          this._logger.warn(`${this._label}: failed to restore sticky connection`);\n          this.disconnect(err);\n        }, stickyConnectionTtlInMs);\n      }\n    });\n    \n    this._pool = new lrap.RootPool(StickySocketConnection, {\n      dependencies: [this, internalEvents],\n      label: `clientStickySocket:${this._label}`,\n    });\n    this._pool.scheduleProcess('connection', {\n      args: [\n        url, this._id,\n        {\n          startCount: 0,\n          emitHistory: new Queue(),\n          lastSentIndex: -1,\n          lastReceivedIndex: -1\n        },\n        {\n          label: this._label,\n          connection: options?.connection,\n          useNativeSocketIoServer: options?.useNativeSocketIoServer,\n          emitHistoryTtlInSeconds: options?.emitHistoryTtlInSeconds ?? msToSeconds(stickyConnectionTtlInMs)\n        }\n      ],\n      failoverThrottleDelay: {\n        mode: 'exponential',\n        resetDelayInMs: 0,\n        minDelayInMs: options?.reconnectionDelayInMs ?? 1000,\n        maxDelayInMs: options?.reconnectionDelayMaxInMs ?? 10000,\n        randomizationFactor: options?.reconnectionRandomizationFactor ?? 0.5\n      }\n    });\n  }\n\n  /**\n   * Returns socket ID\n   * @returns socket ID\n   */\n  get id(): string {\n    return this._id;\n  }\n\n  /**\n   * Returns current native socket\n   * @returns socket.io socket\n   * @internal intended for tests only\n   */\n  get socket(): SocketIOClient.Socket {\n    return this._pool.getProcess('connection')?.socket;\n  }\n\n  /**\n   * Returns current transport name, using socket.io internals\n   * @returns transport name, e.g. \"websocket\"\n   * @internal intended for tests only\n   */\n  get transportName(): string {\n    return this._pool.getProcess('connection')?.transportName;\n  }\n  \n  /**\n   * Returns first present packet index in last emit history\n   * @returns first history index\n   * @internal intended for tests only\n   */\n  get firstHistoryIndex(): number | undefined {\n    return this._pool.getProcess('connection')?.firstHistoryIndex;\n  }\n\n  /**\n   * Returns whether socket connected\n   * @returns is connected\n   */\n  get connected(): boolean {\n    return this._connected;\n  }\n\n  /**\n   * @inheritdoc\n   * @remarks Socket events `ClientStickySockets.INTERNAL_EVENTS` cannot be subscribed to\n   * @throws `ValidationError` if attempting to subscribe to an internal event\n   */\n  on<U extends EventEmitter.Event<ClientStickySocket.Events>>(event: U, callback: ClientStickySocket.Events[U]) {\n    if (ClientStickySocket.INTERNAL_EVENTS.includes(event)) {\n      throw new errors.ValidationError('Cannot subscribe to an internal event');\n    }\n    super.on(event, callback);\n  }\n\n  /**\n   * Emits a data event. All events are buffered if no connection\n   * @param event The event that we're emitting\n   * @param args Optional arguments to send with the event\n   */\n  send(event: string, ...args: any[]) {\n    this._pool.getProcess('connection')?.send(event, ...args);\n  }\n\n  /**\n   * Disconnects socket\n   * @param err error if disconnecting with error\n   * @returns promise resolving when disconnected\n   */\n  async disconnect(err?: Error) {\n    clearTimeout(this._stickyConnectionWaitTimeout);\n    let wasStopped = this._stopped;\n    this._stopped = true;\n    await this._pool.stop();\n    if (!wasStopped) {\n      this._connected = false;\n      this.emit('disconnect', err);\n    }\n  }\n\n  /**\n   * Destroys underlying socket, using socket.io internals. The socket must have `websocket` transport\n   * @param err optional error\n   * @internal intended for tests only, e.g. to test connection loss\n   */\n  destroyInternalSocket(err?: Error) {\n    destroyInternalClientSocket(this._pool.getProcess('connection').socket, err);\n  }\n\n  /**\n   * Removes expired emit history\n   * @internal intended for tests only\n   */\n  removeExpiredEmitHistory() {\n    this._pool.getProcess('connection')?.removeExpiredEmitHistory();\n  }\n}\n\nnamespace ClientStickySocket {\n\n  /** Constructing options */\n  export type Options = Pick<StickySocketConnection.Options, 'connection' | 'label' | 'useNativeSocketIoServer'> & {\n    /**\n     * Emit history buffer TTL. Defaults to `stickyConnectionTtlInSeconds` + `reconnectThrottleDelayInMs`\n     * (converted to seconds)\n     */\n    emitHistoryTtlInSeconds?: number;\n    /** Timeout within of which a connection can be restored as previous one. Defaults to `10` */\n    stickyConnectionTtlInSeconds?: number;\n    /** Reconnection delay. The delay will be increased by 2x each failed connection attempt. Defaults to `1000` */\n    reconnectionDelayInMs?: number;\n    /** Max reconnection delay. Defaults to `10000` */\n    reconnectionDelayMaxInMs?: number;\n    /** Reconnection delay randomization factor in range [0; 1]. Defaults to `0.5` */\n    reconnectionRandomizationFactor?: number;\n  };\n\n  /** Event listeners */\n  export type Events = {\n    /** Fired only once upon first connection */\n    connect: () => void;\n    /** Fired only once upon the last disconnection. Will be fired anyway, even if was never connected */\n    disconnect: (err?: Error) => void;\n    /** Custom subscription events */\n    [event: string]: (...args: any[]) => any;\n  };\n\n  /** Connection events */\n  export const CONNECTION_EVENTS = StickySocketConnection.CONNECTION_EVENTS;\n  /** Internal events */\n  export const INTERNAL_EVENTS = StickySocketConnection.INTERNAL_EVENTS;\n}\n\nexport default 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