307 lines
7.6 KiB
TypeScript
307 lines
7.6 KiB
TypeScript
/**
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* @author Martin Karkowski
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* @email m.karkowski@zema.de
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* @create date 2020-11-06 08:52:36
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* @modify date 2021-11-10 16:52:40
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* @desc [description]
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*/
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import { EventEmitter } from "events";
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import { ILogger } from "js-logger";
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import { generateId } from "../../helpers/idMethods";
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import { NopeObservable } from "../../observables/nopeObservable";
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import {
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IAvailableInstanceGeneratorsMsg,
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IAvailableInstancesMsg,
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IAvailableServicesMsg,
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IAvailableTopicsMsg,
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ICommunicationInterface,
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IEmitter,
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IExecutingTaskMsg,
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IExternalEventMsg,
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IExternalPropertyChangedMsg,
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IRequestTaskMsg,
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IResponseTaskMsg,
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IRpcUnregisterMsg,
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ITaskCancelationMsg,
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} from "../../types/nope/nopeCommunication.interface";
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import { IDispatcherInfo } from "../../types/nope/nopeDispatcher.interface";
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import { INopeObservable } from "../../types/nope/nopeObservable.interface";
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/**
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* A Communication Layer for the Dispatchers.
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* Here, only a Events are used. This layer represents
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* the basic layer. If transmits the events using
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* internal emitters.
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*
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* @export
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* @class EventLayer
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* @implements {ICommunicationInterface}
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*/
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export class EventLayer implements ICommunicationInterface {
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/**
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* Flag, showing whether the Mirror is connected or not.
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*
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* @type {INopeObservable<boolean>}
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* @memberof EventLayer
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*/
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connected: INopeObservable<boolean>;
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/**
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* Flag, to enable, that this layer will be used in a bridge,
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* to show, whether the bridge is connected or not.
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*
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* @memberof EventLayer
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*/
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considerConnection = true;
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allowServiceRedundancy = false;
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/**
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* Creaetes an Event Emitter-based Communication Layer:
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* @param _emitter
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* @param _logger
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*/
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constructor(
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protected _emitter: IEmitter = new EventEmitter(),
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protected _logger?: ILogger
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) {
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this.connected = new NopeObservable();
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this.connected.setContent(true);
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this.id = generateId();
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this._subscribing = new Map();
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}
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allowsServiceRedundancy: boolean;
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receivesOwnMessages: boolean;
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id: string;
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protected _subscribing: Map<string, Set<(...args) => any>>;
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/**
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* Helper-Function, which will publish the subescribe events
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*
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* @protected
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* @memberof EventLayer
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*/
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protected _publishSubscriptions(): void {
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const activeSubscriptions = Array.from(this._subscribing.entries())
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.filter((entry) => {
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return entry[1].size > 0;
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})
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.map((entry) => entry[0]);
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this._emitter.emit("subscribing", activeSubscriptions);
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}
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protected async _on(event: string, cb): Promise<void> {
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if (typeof (await this._emitter.getMaxListeners) === "function") {
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await this._emitter.setMaxListeners(
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(await this._emitter.getMaxListeners()) + 1
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);
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}
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// Store the Event we are publishing
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if (!this._subscribing.has(event)) {
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this._subscribing.set(event, new Set());
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}
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this._subscribing.get(event).add(cb);
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this._publishSubscriptions();
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this._emitter.on(event, cb);
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}
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protected async _emit(name: string, data: any): Promise<void> {
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this._emitter.emit("emitted", { name, data });
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}
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protected async _off(name, cb): Promise<void> {
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this._off(name, cb);
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// Store the Event we are publishing
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if (!this._subscribing.has(name)) {
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this._subscribing.set(name, new Set());
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}
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this._subscribing.get(name).delete(cb);
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this._publishSubscriptions();
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}
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async emitStatusUpdate(status: IDispatcherInfo): Promise<void> {
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await this._emit("statusUdpate", status);
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}
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async onStatusUpdate(cb: (status: IDispatcherInfo) => void): Promise<void> {
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await this._on("statusUdpate", cb);
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}
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async onNewInstancesAvailable(
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cb: (instances: IAvailableInstancesMsg) => void
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): Promise<void> {
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await this._on("newInstancesAvailable", cb);
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}
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async emitNewInstancesAvailable(
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instances: IAvailableInstancesMsg
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): Promise<void> {
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await this._emit("newInstancesAvailable", instances);
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}
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async onTaskCancelation(
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cb: (msg: ITaskCancelationMsg) => void
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): Promise<void> {
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await this._on("cancel", cb);
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}
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async emitTaskCancelation(msg: ITaskCancelationMsg): Promise<void> {
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await this._emit("cancel", msg);
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}
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async onAurevoir(cb: (dispatcher: string) => void): Promise<void> {
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await this._on("aurevoir", cb);
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}
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async emitAurevoir(dispatcher: string): Promise<void> {
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await this._emit("aurevoir", dispatcher);
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}
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async emitNewInstanceGeneratorsAvailable(
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generators: IAvailableInstanceGeneratorsMsg
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): Promise<void> {
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await this._emit("generators", generators);
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}
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async onNewInstanceGeneratorsAvailable(
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cb: (generators: IAvailableInstanceGeneratorsMsg) => void
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): Promise<void> {
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await this._on("generators", cb);
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}
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async emitRpcRequest(name: string, request: IRequestTaskMsg): Promise<void> {
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await this._emit(name, request);
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}
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async emitRpcResponse(name: string, result: IResponseTaskMsg): Promise<void> {
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await this._emit(name, result);
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}
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async onRpcResponse(
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name: string,
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cb: (result: IResponseTaskMsg) => void
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): Promise<void> {
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await this._on(name, cb);
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}
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async offRpcResponse(
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name: string,
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cb: (result: IResponseTaskMsg) => void
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): Promise<void> {
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await this._off(name, cb);
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}
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async onRpcRequest(
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name: string,
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cb: (data: IRequestTaskMsg) => void
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): Promise<void> {
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await this._on(name, cb);
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}
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async offRpcRequest(
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name: string,
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cb: (data: IRequestTaskMsg) => void
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): Promise<void> {
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await this._off(name, cb);
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}
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async emitNewServicesAvailable(
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services: IAvailableServicesMsg
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): Promise<void> {
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await this._emit("services", services);
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}
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async onNewServicesAvailable(
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cb: (services: IAvailableServicesMsg) => void
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): Promise<void> {
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await this._on("services", cb);
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}
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async onBonjour(cb): Promise<void> {
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await this._on("bonjour", cb);
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}
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async emitBonjour(msg): Promise<void> {
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await this._emit("bonjour", msg);
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}
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async emitNewObservablesAvailable(
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topics: IAvailableTopicsMsg
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): Promise<void> {
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await this._emit("topics", topics);
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}
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async onNewObservablesAvailable(
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cb: (topics: IAvailableTopicsMsg) => void
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): Promise<void> {
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await this._on("topics", cb);
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}
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async onEvent(
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event: string,
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cb: (data: IExternalEventMsg) => void
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): Promise<void> {
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await this._on(`Event:${event}`, cb);
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}
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async emitEvent(event: string, data: IExternalEventMsg): Promise<void> {
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await this._emit(`Event:${event}`, data);
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}
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async offEvent(
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event: string,
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cb: (data: IExternalEventMsg) => void
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): Promise<void> {
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await this._off(`Event:${event}`, cb);
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}
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async onUnregisterRpc(cb: (msg: IRpcUnregisterMsg) => void): Promise<void> {
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await this._on("RpcUnregister", cb);
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}
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async emitUnregisterRpc(data: IRpcUnregisterMsg): Promise<void> {
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await this._emit("RpcUnregister", data);
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}
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async onExecutingTasks(cb: (msg: IExecutingTaskMsg) => void): Promise<void> {
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await this._on("ExecutingTask", cb);
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}
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async emitExecutingTasks(data: IExecutingTaskMsg): Promise<void> {
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await this._emit("ExecutingTask", data);
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}
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async onPropertyChange(
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name: string,
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cb: (data: IExternalPropertyChangedMsg<unknown>) => void
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): Promise<void> {
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await this._on(`PropertyChange:${name}`, cb);
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}
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async emitPropertyChange(
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name: string,
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data: IExternalPropertyChangedMsg<unknown>
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): Promise<void> {
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await this._emit(`PropertyChange:${name}`, data);
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}
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async offPropertyChange(
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name: string,
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cb: (data: IExternalPropertyChangedMsg<unknown>) => void
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): Promise<void> {
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await this._off(`PropertyChange:${name}`, cb);
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}
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async dispose(): Promise<void> {
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this.connected.dispose();
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}
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}
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