Making a dynamic mat-table for mutable dataArray

Question

I'm building a simple angular webapp (front only). How can I make a mat-table renders each time my array changes

my component:

export class TableViewComponent implements OnInit {
  dataSource: MatTableDataSource<Process>;
  processes: Process[];

  constructor(private processesService: ProcessesService, private router: Router) { }

  ngOnInit(): void {
    this.getProcesses();
    this.dataSource = new MatTableDataSource(this.processes);
    //HERE I'ld like to watch for this.processes changes and change datasource
  }

  getProcesses(): void {
    this.processes = this.processesService.getProcesses();
  }

}

I've found a lot of solution but with old versions of angular that used deprecated functions. The Idea is to get a callback when array is updated to refresh table