app/src/commons/component/service-detail.component.ts

import { Component, Input, Output, EventEmitter } from '@angular/core';
import { Service } from '@overflow/model/discovery';
import { PingResult } from '@overflow/model/ping';
import { ProbeService } from '../service/probe.service';
import { map, catchError, take } from 'rxjs/operators';
import { of } from 'rxjs';

@Component({
  selector: 'app-service-detail',
  templateUrl: './service-detail.component.html',
  styleUrls: ['./service-detail.component.scss'],
})
export class ServiceDetailComponent {

  @Input() service: Service;
  @Output() ping = new EventEmitter<PingResult>();

  constructor(
    private probeService: ProbeService
  ) {

  }

  doPing() {
    const option = {
      Retry: 3,
      Interval: 1,
      Deadline: 1,
    };

    this.probeService
      .call<PingResult>('PingService.PingService', this.service, option)
      .pipe(
        map((pingResult: PingResult) => {
          this.ping.emit(pingResult);
        }),
        catchError(error => {
          console.log(error);
          alert('An error has occurred.');
          return of();
        }),
        take(1)
      )
      .subscribe();
  }

}