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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,3 @@ | ||
| export interface PingResponse { | ||
| machineName: string; | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,16 @@ | ||
| import { TestBed } from '@angular/core/testing'; | ||
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| import { PingService } from './ping.service'; | ||
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| describe('PingService', () => { | ||
| let service: PingService; | ||
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| beforeEach(() => { | ||
| TestBed.configureTestingModule({}); | ||
| service = TestBed.inject(PingService); | ||
| }); | ||
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| it('should be created', () => { | ||
| expect(service).toBeTruthy(); | ||
| }); | ||
| }); |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,79 @@ | ||
| import {EventEmitter, Injectable} from '@angular/core'; | ||
| import {HttpClient} from "@angular/common/http"; | ||
| import {catchError, interval, mergeMap, Observable, of, retry, Subscription, switchMap, timeout} from "rxjs"; | ||
| import {PingResponse} from "../../datatypes/ping-response"; | ||
| import {ConnectionService} from "../connection/connection.service"; | ||
| import {Connection} from "../../datatypes/connection"; | ||
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| @Injectable({ | ||
| providedIn: 'root' | ||
| }) | ||
| export class PingService { | ||
| public connectionAvailable: EventEmitter<string> = new EventEmitter(); | ||
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| public connectionUnavailable: EventEmitter<string> = new EventEmitter(); | ||
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| private subscription: Subscription = new Subscription(); | ||
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| private availableConnections: string[] = []; | ||
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| constructor(private http: HttpClient, | ||
| private connectionService: ConnectionService) { } | ||
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| async start() { | ||
| console.log("Start ping"); | ||
| this.subscription = new Subscription(); | ||
| let connections = await this.connectionService.getConnections(); | ||
| for (const connection of connections) { | ||
| this.subscription.add(this.periodicRequest(this.getPingUrl(connection), 1000).subscribe(response => { | ||
| if (response !== null) { | ||
| this.addAvailableConnection(connection); | ||
| } else { | ||
| this.removeAvailableConnection(connection); | ||
| } | ||
| })); | ||
| } | ||
| } | ||
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| stop() { | ||
| console.log("Stop ping"); | ||
| this.subscription.unsubscribe(); | ||
| } | ||
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| async restart() { | ||
| this.stop(); | ||
| await this.start(); | ||
| } | ||
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| private getPingUrl(connection: Connection) { | ||
| return `${connection.ssl ? "https" : "http"}://${connection.host}:${connection.port}/ping`; | ||
| } | ||
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| private removeAvailableConnection(connection: Connection) { | ||
| let existingConnectionIndex = this.availableConnections.findIndex(x => x == connection.id); | ||
| if (existingConnectionIndex !== -1) { | ||
| this.availableConnections.splice(existingConnectionIndex, 1); | ||
| this.connectionUnavailable.emit(connection.id); | ||
| } | ||
| } | ||
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| private addAvailableConnection(connection: Connection) { | ||
| if (this.availableConnections.find(x => x == connection.id)) { | ||
| return; | ||
| } | ||
| this.availableConnections.push(connection.id); | ||
| this.connectionAvailable.emit(connection.id); | ||
| } | ||
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| private periodicRequest(url: string, intervalTime: number): Observable<any> { | ||
| return interval(intervalTime).pipe( | ||
| switchMap(() => this.http.get(url).pipe( | ||
| timeout(500), | ||
| catchError(error => { | ||
| return of(null); | ||
| }) | ||
| )) | ||
| ); | ||
| } | ||
|
|
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| } |
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