1.
BIGLIETTI, PREGO!a ticket for the (command) bus

2.
@magobaol
UNA SERIE SCRITTA, SCENEGGIATA E NARRATA DA

3.
INTERPRETI

4.
GIULIA
LA CLIENTE

5.
ROBERTO
IL PROGRAMMATORE

6.
PROLOGO

7.
Giulia è la direttrice
generale di una
compagnia di treni
ad alta velocità

8.
Giulia commissiona a
Roberto un software
per la vendita di
biglietti online.

9.
ORGANIZZAZIONE FILE
s01e01

10.
src
!"" CustomerBundle
!"" TicketBundle
# !"" Controller
# !"" DataFixtures
# !"" Entity
# !"" Form
# !"" Listener
# %"" Service
| %"" Twig
!"" TrainBundle
%"" UserBundle
TicketOffice Project

11.
ENTITÀ
s01e02

12.
Ticket.php/**
* @ORMEntity()
* @ORMTable(name="ticket")
*/
class Ticket
{
/**
* @ORMId
* @ORMColumn(type="integer")
* @ORMGeneratedValue(strategy="AUTO")
**/
protected $id;
/**
* @ORMColumn(type="integer")
**/
protected $customerId;
/**
* @ORMColumn(type="integer")
**/
protected $trainNumber;
/**
* @ORMColumn(type="integer")
**/
protected $seatNumber;

13.
Ticket.php
/**
* @return mixed
*/
public function getId()
{
return $this->id;
}
/**
* @return mixed
*/
public function getCustomerId()
{
return $this->customerId;
}
/**
* @return mixed
*/
public function getTrainNumber()
{
return $this->trainNumber;
}

14.
Ticket.php
/**
* @param mixed $id
*/
public function setId($id)
{
$this->id = $id;
}
/**
* @param mixed $customerId
*/
public function setCustomerId($customerId)
{
$this->customerId = $customerId;
}
/**
* @param mixed $trainNumber
*/
public function setTrainNumber($trainNumber)
{
$this->trainNumber = $trainNumber;
}

15.
Ticket.php/**
* @ORMEntity()
* @ORMTable(name="ticket")
*/
class Ticket
{
/**
* @ORMId
* @ORMColumn(type="integer")
* @ORMGeneratedValue(strategy="AUTO")
**/
protected $id;
/**
* @ORMColumn(type="integer")
**/
protected $customerId;
/**
* @ORMColumn(type="integer")
**/
protected $trainNumber;
/**
* @ORMColumn(type="integer")
**/
protected $seatNumber;

16.
CONTROLLER
s01e03

17.
TicketController.php
public function createTicketAction(Request $request)
{
$seatNumberPicker = $this->get('seat_number_picker');
$seatNumber =
$seatNumberPicker->pickSeat(
$request->get('trainNumber'),
$request->get(‘departure’)
);
$ticket = new Ticket();
$ticket->setCustomerId($request->get('customerId'));
$ticket->setTrainNumber($request->get('trainNumber'));
$ticket->setDeparture($request->get('departure'));
$ticket->setSeatNumber($seatNumber);
$em = $this->get('doctrine.orm.entity_manager');
$em->persist($ticket);
$em->flush();
return $this->render('thank_you_page.html.twig');
}

18.
TicketController.php
public function createTicketAction(Request $request)
{
$seatNumberPicker = $this->get('seat_number_picker');
$seatNumber =
$seatNumberPicker->pickSeat(
$request->get('trainNumber'),
$request->get(‘departure’)
);
$ticket = new Ticket();
$ticket->setCustomerId($request->get('customerId'));
$ticket->setTrainNumber($request->get('trainNumber'));
$ticket->setDeparture($request->get('departure'));
$ticket->setSeatNumber($seatNumber);
$em = $this->get('doctrine.orm.entity_manager');
$em->persist($ticket);
$em->flush();
return $this->render('thank_you_page.html.twig');
}
$seatNumberPicker = $this->get('seat_number_picker');
$seatNumber =
$seatNumberPicker->pickSeat(
$request->get('trainNumber'),
$request->get(‘departure’)
);

19.
TicketController.php
public function createTicketAction(Request $request)
{
$seatNumberPicker = $this->get('seat_number_picker');
$seatNumber =
$seatNumberPicker->pickSeat(
$request->get('trainNumber'),
$request->get(‘departure’)
);
$ticket = new Ticket();
$ticket->setCustomerId($request->get('customerId'));
$ticket->setTrainNumber($request->get('trainNumber'));
$ticket->setDeparture($request->get('departure'));
$ticket->setSeatNumber($seatNumber);
$em = $this->get('doctrine.orm.entity_manager');
$em->persist($ticket);
$em->flush();
return $this->render('thank_you_page.html.twig');
}
$ticket = new Ticket();
$ticket->setCustomerId($request->get('customerId'));
$ticket->setTrainNumber($request->get('trainNumber'));
$ticket->setDeparture($request->get('departure'));
$ticket->setSeatNumber($seatNumber);

20.
TicketController.php
public function createTicketAction(Request $request)
{
$seatNumberPicker = $this->get('seat_number_picker');
$seatNumber =
$seatNumberPicker->pickSeat(
$request->get('trainNumber'),
$request->get(‘departure’)
);
$ticket = new Ticket();
$ticket->setCustomerId($request->get('customerId'));
$ticket->setTrainNumber($request->get('trainNumber'));
$ticket->setDeparture($request->get('departure'));
$ticket->setSeatNumber($seatNumber);
$em = $this->get('doctrine.orm.entity_manager');
$em->persist($ticket);
$em->flush();
return $this->render('thank_you_page.html.twig');
}
$em = $this->get('doctrine.orm.entity_manager');
$em->persist($ticket);
$em->flush();

21.
TicketController.php
public function createTicketAction(Request $request)
{
$seatNumberPicker = $this->get('seat_number_picker');
$seatNumber =
$seatNumberPicker->pickSeat(
$request->get('trainNumber'),
$request->get(‘departure’)
);
$ticket = new Ticket();
$ticket->setCustomerId($request->get('customerId'));
$ticket->setTrainNumber($request->get('trainNumber'));
$ticket->setDeparture($request->get('departure'));
$ticket->setSeatNumber($seatNumber);
$em = $this->get('doctrine.orm.entity_manager');
$em->persist($ticket);
$em->flush();
return $this->render('thank_you_page.html.twig');
}
return $this->render('thank_you_page.html.twig');

22.
UN PICCOLO
MIGLIORAMENTO
s01e04

23.
TicketController.php
public function createTicketAction(Request $request)
{
//pick a seat...
//create ticket...
//save ticket...
$customerRepo = $this->get('customer_repository');
$customer = $customerRepo->find($request->get('customerId'));
$ticketMailer = $this->get('ticket_mailer');
$ticketMailer->sendEmail($customer->getEmail(), $ticket);
return $this->render('thank_you_page.html.twig');
}

24.
UN PICCOLO PROBLEMA
s01e05

25.
TicketController.php
public function createTicketAction(Request $request)
{
//pick a seat...
$PNRGenerator = $this->get('pnr_generator');
$PNR = $PNRGenerator->generate(
$request->get('trainNumber'),
$request->get('departure'),
$seatNumber
);
//create ticket...
$ticket->setPNR($PNR);
//save ticket...
//retrieve customer...
//send email to customer...
return $this->render('thank_you_page.html.twig');
}

26.
UN (ALTRO) PICCOLO
MIGLIORAMENTO
s01e06

27.
TicketController.php
public function createTicketAction(Request $request)
{
//pick a seat...
//generate PNR...
//create ticket...
//save ticket...
//retrieve customer...
//send email to customer...
$PNRSMSSender = $this->get('pnr_sms_sender');
$PNRSMSSender->send($customer->getMobile(), $PNR);
return $this->render('thank_you_page.html.twig');
}

28.
L’INQUIETUDINE DI
ROBERTO
s01e07

29.
public function createTicketAction(Request $request)
{
$seatNumberPicker = $this->get('seat_number_picker');
$seatNumber = $seatNumberPicker->pickSeat(…);
$PNRGenerator = $this->get('pnr_generator');
$PNR = $PNRGenerator->generate(…);
$ticket = new Ticket();
$ticket->setCustomerId($request->get('customerId'));
$ticket->setTrainNumber($request->get('trainNumber'));
$ticket->setDeparture($request->get('departure'));
$ticket->setSeatNumber($seatNumber);
$ticket->setPNR($PNR);
$em = $this->get('doctrine.orm.entity_manager');
$em->persist($ticket);
$em->flush();
$customerRepository = $this->get('customer_repository');
$customer = $customerRepository->find($request->get('customerId'));
$ticketMailer = $this->get('ticket_mailer');
$ticketMailer->sendEmailToCustomer($customer->getEmail(), $ticket);
$PNRSMSSender = $this->get('pnr_sms_sender');
$PNRSMSSender->send($customer->getMobile(), $PNR);
return $this->render('thank_you_page.html.twig');
}

30.
public function createTicketAction(Request $request)
{
$seatNumberPicker = $this->get('seat_number_picker');
$seatNumber = $seatNumberPicker->pickSeat(…);
$PNRGenerator = $this->get('pnr_generator');
$PNR = $PNRGenerator->generate(…);
$ticket = new Ticket();
$ticket->setCustomerId($request->get('customerId'));
$ticket->setTrainNumber($request->get('trainNumber'));
$ticket->setDeparture($request->get('departure'));
$ticket->setSeatNumber($seatNumber);
$ticket->setPNR($PNR);
$em = $this->get('doctrine.orm.entity_manager');
$em->persist($ticket);
$em->flush();
$customerRepository = $this->get('customer_repository');
$customer = $customerRepository->find($request->get('customerId'));
$ticketMailer = $this->get('ticket_mailer');
$ticketMailer->sendEmailToCustomer($customer->getEmail(), $ticket);
$PNRSMSSender = $this->get('pnr_sms_sender');
$PNRSMSSender->send($customer->getMobile(), $PNR);
return $this->render('thank_you_page.html.twig');
}

31.
public function createTicketAction(Request $request)
{
$seatNumberPicker = $this->get('seat_number_picker');
$seatNumber = $seatNumberPicker->pickSeat(…);
$ticket = new Ticket();
$ticket->setCustomerId($request->get('customerId'));
$ticket->setTrainNumber($request->get('trainNumber'));
$ticket->setDeparture($request->get('departure'));
$ticket->setSeatNumber($seatNumber);
$em = $this->get('doctrine.orm.entity_manager');
$em->persist($ticket);
$em->flush();
return $this->render('thank_you_page.html.twig');
}
s01e03

32.
s01e04
public function createTicketAction(Request $request)
{
$seatNumberPicker = $this->get('seat_number_picker');
$seatNumber = $seatNumberPicker->pickSeat(...);
$ticket = new Ticket();
$ticket->setCustomerId($request->get('customerId'));
$ticket->setTrainNumber($request->get('trainNumber'));
$ticket->setDeparture($request->get('departure'));
$ticket->setSeatNumber($seatNumber);
$em = $this->get('doctrine.orm.entity_manager');
$em->persist($ticket);
$em->flush();
$customerRepository = $this->get('customer_repository');
$customer = $customerRepository->find($request->get('customerId'));
$ticketMailer = $this->get('ticket_mailer');
$ticketMailer->sendEmailToCustomer(...);
return $this->render('thank_you_page.html.twig');
}

33.
s01e05public function createTicketAction(Request $request)
{
$seatNumberPicker = $this->get('seat_number_picker');
$seatNumber = $seatNumberPicker->pickSeat(…);
$PNRGenerator = $this->get('pnr_generator');
$PNR = $PNRGenerator->generate(…);
$ticket = new Ticket();
$ticket->setCustomerId($request->get('customerId'));
$ticket->setTrainNumber($request->get('trainNumber'));
$ticket->setDeparture($request->get('departure'));
$ticket->setSeatNumber($seatNumber);
$ticket->setPNR($PNR);
$em = $this->get('doctrine.orm.entity_manager');
$em->persist($ticket);
$em->flush();
$customerRepository = $this->get('customer_repository');
$customer = $customerRepository->find($request->get('customerId'));
$ticketMailer = $this->get('ticket_mailer');
$ticketMailer->sendEmailToCustomer($customer->getEmail(), $ticket);
return $this->render('thank_you_page.html.twig');
}

34.
public function createTicketAction(Request $request)
{
$seatNumberPicker = $this->get('seat_number_picker');
$seatNumber = $seatNumberPicker->pickSeat(…);
$PNRGenerator = $this->get('pnr_generator');
$PNR = $PNRGenerator->generate(…);
$ticket = new Ticket();
$ticket->setCustomerId($request->get('customerId'));
$ticket->setTrainNumber($request->get('trainNumber'));
$ticket->setDeparture($request->get('departure'));
$ticket->setSeatNumber($seatNumber);
$ticket->setPNR($PNR);
$em = $this->get('doctrine.orm.entity_manager');
$em->persist($ticket);
$em->flush();
$customerRepository = $this->get('customer_repository');
$customer = $customerRepository->find($request->get('customerId'));
$ticketMailer = $this->get('ticket_mailer');
$ticketMailer->sendEmailToCustomer($customer->getEmail(), $ticket);
$PNRSMSSender = $this->get('pnr_sms_sender');
$PNRSMSSender->send($customer->getMobile(), $PNR);
return $this->render('thank_you_page.html.twig');
}
s01e06

35.
STORIA DI UN
REFACTORING
s01e08

36.
public function createTicketAction(Request $request)
{
$seatNumberPicker = $this->get('seat_number_picker');
$seatNumber = $seatNumberPicker->pickSeat(...);
$PNRGenerator = $this->get('pnr_generator');
$PNR = $PNRGenerator->generate(...);
$ticket = new Ticket();
$ticket->setCustomerId($request->get('customerId'));
$ticket->setTrainNumber($request->get('trainNumber'));
$ticket->setDeparture($request->get('departure'));
$ticket->setSeatNumber($seatNumber);
$ticket->setPNR($PNR);
$em = $this->get('doctrine.orm.entity_manager');
$em->persist($ticket);
$em->flush();
$customerRepository = $this->get('customer_repository');
$customer = $customerRepository->find($request->get('customerId'));
$ticketMailer = $this->get('ticket_mailer');
$ticketMailer->sendEmailToCustomer(...);
$PNRSMSSender = $this->get('pnr_sms_sender');
$PNRSMSSender->send($customer->getMobile(), $PNR);
return $this->render('thank_you_page.html.twig');
}

37.
public function createTicketAction(Request $request)
{
$seatNumberPicker = $this->get('seat_number_picker');
$seatNumber = $seatNumberPicker->pickSeat(...);
$PNRGenerator = $this->get('pnr_generator');
$PNR = $PNRGenerator->generate(...);
$ticket = new Ticket();
$ticket->setCustomerId($request->get('customerId'));
$ticket->setTrainNumber($request->get('trainNumber'));
$ticket->setDeparture($request->get('departure'));
$ticket->setSeatNumber($seatNumber);
$ticket->setPNR($PNR);
$em = $this->get('doctrine.orm.entity_manager');
$em->persist($ticket);
$em->flush();
$customerRepository = $this->get('customer_repository');
$customer = $customerRepository->find($request->get('customerId'));
$ticketMailer = $this->get('ticket_mailer');
$ticketMailer->sendEmailToCustomer(...);
$PNRSMSSender = $this->get('pnr_sms_sender');
$PNRSMSSender->send($customer->getMobile(), $PNR);
return $this->render('thank_you_page.html.twig');
}

38.
DIETA!

39.
TicketController.php
public function createTicketAction(Request $request)
{
$ticketCreator = $this->get('ticket_creator');
$ticketCreator->createTicket(
$request->get('trainNumber'),
$request->get('departure'),
$request->get(‘customerId')
);
return $this->render('thank_you_page.html.twig');
}

40.
TicketCreatorService.php
class TicketCreatorService
{
public function __construct()
{
}
}

41.
TicketCreatorService.php
class TicketCreatorService
{
public function __construct(
SeatNumberPicker $seatNumberPicker
) {
$this->seatNumberPicker = $seatNumberPicker;
}
}

42.
TicketCreatorService.php
class TicketCreatorService
{
public function __construct(
SeatNumberPicker $seatNumberPicker,
PNRGenerator $PNRGenerator
) {
$this->seatNumberPicker = $seatNumberPicker;
$this->PNRGenerator = $PNRGenerator;
}
}

43.
TicketCreatorService.php
class TicketCreatorService
{
public function __construct(
SeatNumberPicker $seatNumberPicker,
PNRGenerator $PNRGenerator,
EntityRepository $customerRepository
) {
$this->seatNumberPicker = $seatNumberPicker;
$this->PNRGenerator = $PNRGenerator;
$this->customerRepository = $customerRepository;
}
}

44.
TicketCreatorService.php
class TicketCreatorService
{
public function __construct(
SeatNumberPicker $seatNumberPicker,
PNRGenerator $PNRGenerator,
EntityRepository $customerRepository,
EntityRepository $ticketRepository
) {
$this->seatNumberPicker = $seatNumberPicker;
$this->PNRGenerator = $PNRGenerator;
$this->customerRepository = $customerRepository;
$this->ticketRepository = $ticketRepository;
}
}

45.
TicketCreatorService.php
class TicketCreatorService
{
public function __construct(
SeatNumberPicker $seatNumberPicker,
PNRGenerator $PNRGenerator,
EntityRepository $customerRepository,
EntityRepository $ticketRepository,
EntityManager $entityManager
) {
$this->seatNumberPicker = $seatNumberPicker;
$this->PNRGenerator = $PNRGenerator;
$this->customerRepository = $customerRepository;
$this->ticketRepository = $ticketRepository;
$this->entityManager = $entityManager;
}
}

46.
TicketCreatorService.php
class TicketCreatorService
{
public function __construct(
SeatNumberPicker $seatNumberPicker,
PNRGenerator $PNRGenerator,
EntityRepository $customerRepository,
EntityRepository $ticketRepository,
EntityManager $entityManager,
TicketMailer $ticketMailer
) {
$this->seatNumberPicker = $seatNumberPicker;
$this->PNRGenerator = $PNRGenerator;
$this->customerRepository = $customerRepository;
$this->ticketRepository = $ticketRepository;
$this->entityManager = $entityManager;
$this->ticketMailer = $ticketMailer;
}
}

47.
TicketCreatorService.php
class TicketCreatorService
{
public function __construct(
SeatNumberPicker $seatNumberPicker,
PNRGenerator $PNRGenerator,
EntityRepository $customerRepository,
EntityRepository $ticketRepository,
EntityManager $entityManager,
TicketMailer $ticketMailer,
PNRSMSSender $PNRSMSSender
) {
$this->seatNumberPicker = $seatNumberPicker;
$this->PNRGenerator = $PNRGenerator;
$this->customerRepository = $customerRepository;
$this->ticketRepository = $ticketRepository;
$this->entityManager = $entityManager;
$this->ticketMailer = $ticketMailer;
$this->PNRSMSSender = $PNRSMSSender;
}
}

48.
TicketCreatorService.php
public function createTicket($trainNumber, $departure, $customerId)
{
$seatNumber = $this->seatNumberPicker->pickSeat(...);
$PNR = $this->PNRGenerator->generate(...);
$ticket = new Ticket();
$ticket->setCustomerId($customerId);
$ticket->setTrainNumber($trainNumber);
$ticket->setDeparture($departure);
$ticket->setSeatNumber($seatNumber);
$ticket->setPNR($PNR);
$this->entityManager->persist($ticket);
$this->entityManager->flush($ticket);
$customer = $this->customerRepository->find($customerId);
$this->ticketMailer->sendEmailToCustomer(...);
$this->PNRSMSSender->send($customer->getMobile(), $PNR);
}

49.
meh…

50.
public function createTicketAction(Request $request)
{
$seatNumberPicker = $this->get('seat_number_picker');
$seatNumber = $seatNumberPicker->pickSeat(...);
$PNRGenerator = $this->get('pnr_generator');
$PNR = $PNRGenerator->generate(...);
$ticket = new Ticket();
$ticket->setCustomerId($request->get('customerId'));
$ticket->setTrainNumber($request->get('trainNumber'));
$ticket->setDeparture($request->get('departure'));
$ticket->setSeatNumber($seatNumber);
$ticket->setPNR($PNR);
$em = $this->get('doctrine.orm.entity_manager');
$em->persist($ticket);
$em->flush();
$customerRepository = $this->get('customer_repository');
$customer = $customerRepository->find($request->get('customerId'));
$ticketMailer = $this->get('ticket_mailer');
$ticketMailer->sendEmailToCustomer(...);
$PNRSMSSender = $this->get('pnr_sms_sender');
$PNRSMSSender->send($customer->getMobile(), $PNR);
return $this->render('thank_you_page.html.twig');
}
TicketController.php

51.
TicketController.php
public function createTicketAction(Request $request)
{
$seatNumberPicker = $this->get('seat_number_picker');
$seatNumber = $seatNumberPicker->pickSeat(…);
$PNRGenerator = $this->get('pnr_generator');
$PNR = $PNRGenerator->generate(…);
$ticket = new Ticket();
$ticket->setCustomerId($request->get('customerId'));
$ticket->setTrainNumber($request->get('trainNumber'));
$ticket->setDeparture($request->get('departure'));
$ticket->setSeatNumber($seatNumber);
$ticket->setPNR($PNR);
$em = $this->get('doctrine.orm.entity_manager');
$em->persist($ticket);
$em->flush();
$customerRepository = $this->get('customer_repository');
$customer = $customerRepository->find($request->get('customerId'));
$ticketMailer = $this->get('ticket_mailer');
$ticketMailer->sendEmailToCustomer($customer->getEmail(), $ticket);
$PNRSMSSender = $this->get('pnr_sms_sender');
$PNRSMSSender->send($customer->getMobile(), $PNR);
return $this->render('thank_you_page.html.twig');
}
public function createTicketAction(Request $request)
{
$seatNumber = $seatNumberPicker->pickSeat(...);
$PNR = $PNRGenerator->generate(...);
$ticket = new Ticket();
$ticket->setCustomerId($request->get('customerId'));
$ticket->setTrainNumber($request->get('trainNumber'));
$ticket->setDeparture($request->get('departure'));
$ticket->setSeatNumber($seatNumber);
$ticket->setPNR($PNR);
$em->persist($ticket);
$em->flush();
$customer = $customerRepository->find($request->get('customerId'));
$ticketMailer->sendEmailToCustomer(...);
$PNRSMSSender->send($customer->getMobile(), $PNR);
return $this->render('thank_you_page.html.twig');
}

52.
TicketController.php
public function createTicketAction(Request $request)
{
$seatNumber = $seatNumberPicker->pickSeat(...);
$PNR = $PNRGenerator->generate(...);
$ticket = new Ticket();
$ticket->setCustomerId($request->get('customerId'));
$ticket->setTrainNumber($request->get('trainNumber'));
$ticket->setDeparture($request->get('departure'));
$ticket->setSeatNumber($seatNumber);
$ticket->setPNR($PNR);
$em->persist($ticket);
$em->flush();
$customer = $customerRepository->find($request->get('customerId'));
$ticketMailer->sendEmailToCustomer(...);
$PNRSMSSender->send($customer->getMobile(), $PNR);
return $this->render('thank_you_page.html.twig');
}

53.
TicketController.php
public function createTicketAction(Request $request)
{
$seatNumber = $seatNumberPicker->pickSeat(...);
$PNR = $PNRGenerator->generate(...);
$ticket = new Ticket();
$ticket->setCustomerId($request->get('customerId'));
$ticket->setTrainNumber($request->get('trainNumber'));
$ticket->setDeparture($request->get('departure'));
$ticket->setSeatNumber($seatNumber);
$ticket->setPNR($PNR);
$em->persist($ticket);
$em->flush();
$customer = $customerRepository->find($request->get('customerId'));
$ticketMailer->sendEmailToCustomer(...);
$PNRSMSSender->send($customer->getMobile(), $PNR);
return $this->render('thank_you_page.html.twig');
}

54.
TicketCreatorService.php
public function createTicket($trainNumber, $departure, $customerId)
{
$seatNumber = $this->seatNumberPicker->pickSeat(...);
$PNR = $this->PNRGenerator->generate(...);
$ticket = new Ticket();
$ticket->setCustomerId($customerId);
$ticket->setTrainNumber($trainNumber);
$ticket->setDeparture($departure);
$ticket->setSeatNumber($seatNumber);
$ticket->setPNR($PNR);
$this->entityManager->persist($ticket);
$this->entityManager->flush($ticket);
$customer = $this->customerRepository->find($customerId);
$this->ticketMailer->sendEmailToCustomer(...);
$this->PNRSMSSender->send($customer->getMobile(), $PNR);
}

55.
TicketController.php
public function createTicketAction(Request $request)
{
$ticketCreator = $this->get('ticket_creator');
$ticketCreator->createTicket(
$request->get('trainNumber'),
$request->get('departure'),
$request->get(‘customerId')
);
return $this->render('thank_you_page.html.twig');
}

56.
TicketController.php
public function createTicketAction(Request $request)
{
$ticketCreator = $this->get('ticket_creator');
$ticketCreator->createTicket(
$request->get('trainNumber'),
$request->get('departure'),
$request->get(‘customerId')
);
return $this->render('thank_you_page.html.twig');
}

57.
IL GRANDE SAGGIO
s01e09

58.
UNA PROMOZIONE!

59.
TicketCreatorService.php
class TicketCreatorService
{
public function createTicket($trainNumber, $departure, $customerId)
{
$seatNumber = $this->seatNumberPicker->pickSeat($trainNumber, $departure);
$PNR = $this->PNRGenerator->generate($trainNumber, $departure, $seatNumber);
$ticket = new Ticket();
$ticket->setCustomerId($customerId);
$ticket->setTrainNumber($trainNumber);
$ticket->setDeparture($departure);
$ticket->setSeatNumber($seatNumber);
$ticket->setPNR($PNR);
$this->entityManager->persist($ticket);
$this->entityManager->flush($ticket);
$customer = $this->customerRepository->find($customerId);
$this->ticketMailer->sendEmailToCustomer($customer->getEmail(), $ticket);
$this->PNRSMSSender->send($customer->getMobile(), $PNR);
}
}

60.
TicketController.php
public function createTicketAction(Request $request)
{
$ticketCreator = $this->get('ticket_creator');
$ticketCreator->createTicket(
$request->get('trainNumber'),
$request->get('departure'),
$request->get(‘customerId')
);
return $this->render('thank_you_page.html.twig');
}

61.
@agilegigi

62.
Disclaimer: @agilegigi non ha mai detto questa
cosa, ma secondo me potrebbe farlo.

63.
TicketController.php
public function createTicketAction(Request $request)
{
$ticketCreator = $this->get('ticket_creator');
$ticketCreator->createTicket(
$request->get('trainNumber'),
$request->get('departure'),
$request->get('customerId'));
$ticketRepository = $this->get('ticket_repository');
$ticketInADay =
$ticketRepository->countTicketForADay($request->get('departure'));
if ($ticketInADay == 100) {
$winnerMailer = $this->get(‘winner_mailer');
$winnerMailer->send($customer);
}
return $this->render('thank_you_page.html.twig');
}

64.
TicketController.php
public function createTicketAction(Request $request)
{
$ticketCreator = $this->get('ticket_creator');
$ticketCreator->createTicket(
$request->get('trainNumber'),
$request->get('departure'),
$request->get('customerId'));
$ticketRepository = $this->get('ticket_repository');
$ticketInADay =
$ticketRepository->countTicketForADay($request->get('departure'));
if ($ticketInADay == 100) {
$winnerMailer = $this->get(‘winner_mailer');
$winnerMailer->send($customer);
}
return $this->render('thank_you_page.html.twig');
}
$ticketRepository = $this->get('ticket_repository');
$ticketInADay =
$ticketRepository->countTicketForADay($request->get('departure'));
if ($ticketInADay == 100) {
$winnerMailer = $this->get(‘winner_mailer');
$winnerMailer->send($customer);
}

65.
e poi #lunedìcepensamo

66.
PRIMA O POI
C’È SEMPRE UN LUNEDì
s01e10

67.
il lunedì seguente…

68.
TicketController.php
public function createTicketAction(Request $request)
{
$ticketCreator = $this->get('ticket_creator');
$ticketCreator->createTicket(
$request->get('trainNumber'),
$request->get('departure'),
$request->get('customerId'));
$ticketRepository = $this->get('ticket_repository');
$ticketInADay =
$ticketRepository->countTicketForADay($request->get('departure'));
if ($ticketInADay == 100) {
$winnerMailer = $this->get(‘winner_mailer');
$winnerMailer->send($customer);
}
return $this->render('thank_you_page.html.twig');
}

69.
TicketController.php
public function createTicketAction(Request $request)
{
$ticketCreator = $this->get('ticket_creator');
$ticketCreator->createTicket(
$request->get('trainNumber'),
$request->get('departure'),
$request->get('customerId'));
$ticketRepository = $this->get('ticket_repository');
$ticketInADay =
$ticketRepository->countTicketForADay($request->get('departure'));
if ($ticketInADay == 100) {
$winnerMailer = $this->get(‘winner_mailer');
$winnerMailer->send($customer);
}
return $this->render('thank_you_page.html.twig');
}

70.
FINE PRIMA STAGIONE

71.
TRA LA PRIMA E LA
SECONDA STAGIONE...

72.
S.O.L.I.D.

73.
DECOUPLING

74.
DOMAIN DRIVEN DESIGN

75.
UBIQUITOUS LANGUAGE

76.
RICH MODEL

77.
ONION ARCHITECTURE

78.
in arrivo…
STAGIONE 2

79.
thanks to @leopro for the inspiring picture
COMMAND BUS

80.
EVENT BUS

81.
È un canale di comunicazione che
consente di inviare e ricevere messaggi in
un'applicazione
MESSAGE BUS

82.
I messaggi possono essere
comandi ed eventi
MESSAGE BUS

83.
COSA È UN COMANDO?
È un messaggio
tramite il quale si
comunica al sistema
che si vuole fare
qualcosa
[ request ]
[ command ]
[ command bus ]
[ command handler ]
(non restituisce nulla)

84.
COSA È UN EVENTO?
È un messaggio
tramite il quale il
sistema comunica
che è accaduto
qualcosa
[ tipicamente in un
command handler ]
[ event ]
[ event bus ]
[ subscriber 1 ] [ subscriber 2 ]

85.
TACTICIANhttps://tactician.thephpleague.com/

86.
SIMPLEBUShttp://simplebus.github.io/MessageBus/

87.
STAGIONE 2

88.
ORGANIZZAZIONE FILE
s02e01

89.
.
!"" app
# !"" Resources
# # %"" views
# # %"" default
# %"" config
!"" bin
!"" src
# %"" AppBundle
# %"" Controller
!"" tests
# %"" AppBundle
# %"" Controller
!"" var
# !"" cache
# !"" logs
# %"" sessions
%"" web
Symfony 3 folders

90.
.
!"" app
# !"" Resources
# # %"" views
# # %"" default
# %"" config
!"" bin
!"" src
# %"" AppBundle
# %"" Controller
!"" tests
# %"" AppBundle
# %"" Controller
!"" var
# !"" cache
# !"" logs
# %"" sessions
%"" web
Symfony 3 folders
!"" src
# %"" AppBundle
# %"" Controller

91.
src
%"" AppBundle
Domain folder

92.
src
!"" AppBundle
%"" TicketOffice
Domain folder

93.
src
!"" AppBundle
%"" TicketOffice
%"" Sale
Domain folder

94.
ENTITÀ
s02e02

95.
src
!"" AppBundle
%"" TicketOffice
%"" Sale
Domain folder

96.
src
!"" AppBundle
%"" TicketOffice
%"" Sale
%"" Entity
Domain folder

97.
src
!"" AppBundle
%"" TicketOffice
%"" Sale
%"" Entity
%"" Ticket.php
Domain folder

98.
Ticket.php
class Ticket
{
private $id;
private $customerId;
private $trainNumber;
private $departure;
private $seatNumber;
private $PNR;
public function __construct(
$id, $customerId, $trainNumber, $departure, $seatNumber, $PNR)
{
$this->id = $id;
$this->customerId = $customerId;
$this->trainNumber = $trainNumber;
$this->departure = $departure;
$this->seatNumber = $seatNumber;
$this->PNR = $PNR;
}
}

99.
Rectangle.php
class Rectangle
{
private $width;
private $height;
public function getWidth()
{
return $this->width;
}
public function setWidth($width)
{
$this->width = $width;
}
public function getHeight()
{
return $this->height;
}
public function setHeight($height)
{
$this->height = $height;
}
}

100.
Somewhere.php
$rectangle = new Rectangle();
$rectangle->setWidth(100);
$rectangle->setHeight(50);

101.
Somewhere.php
$rectangle = new Rectangle();
$rectangle->setWidth(100);
$rectangle->setHeight(50);
$rectangle = new Rectangle();
NON È UN RETTANGOLO!

102.
Rectangle.php
class Rectangle
{
private $width;
private $height;
public function __construct($width, $height)
{
$this->width = $width;
$this->height = $height;
}
public function getWidth()
{
return $this->width;
}
public function getHeight()
{
return $this->height;
}
}

103.
Somewhere.php
$rectangle = new Rectangle(100, 50);
QUESTO SÌ

104.
Ticket.php
class Ticket
{
private $id;
private $customerId;
private $trainNumber;
private $departure;
private $seatNumber;
private $PNR;
public function __construct(
$id, $customerId, $trainNumber,
$departure, $seatNumber, $PNR
) {
$this->id = $id;
$this->customerId = $customerId;
$this->trainNumber = $trainNumber;
$this->departure = $departure;
$this->seatNumber = $seatNumber;
$this->PNR = $PNR;
}
}

105.
app
!"" DoctrineMigrations
!"" Resources
%"" config
%"" config.yml
config.yml

106.
config.yml
doctrine:
orm:
auto_generate_proxy_classes: "%kernel.debug%"
naming_strategy:
doctrine.orm.naming_strategy.underscore
auto_mapping: false
mappings:
ticket_office.sale:
type: yml
dir: '%kernel.root_dir%/../src/AppBundle/
Resources/config/doctrine/Sale'
is_bundle: false
prefix: TicketOfficeSaleEntity
alias: AppSale

107.
config.yml
doctrine:
orm:
auto_generate_proxy_classes: "%kernel.debug%"
naming_strategy:
doctrine.orm.naming_strategy.underscore
auto_mapping: false
mappings:
ticket_office.sale:
type: yml
dir: '%kernel.root_dir%/../src/AppBundle/
Resources/config/doctrine/Sale'
is_bundle: false
prefix: TicketOfficeSaleEntity
alias: AppSale
auto_mapping: false

108.
config.yml
doctrine:
orm:
auto_generate_proxy_classes: "%kernel.debug%"
naming_strategy:
doctrine.orm.naming_strategy.underscore
auto_mapping: false
mappings:
ticket_office.sale:
type: yml
dir: '%kernel.root_dir%/../src/AppBundle/
Resources/config/doctrine/Sale'
is_bundle: false
prefix: TicketOfficeSaleEntity
alias: AppSale
mappings:
ticket_office.sale:
type: yml
dir: '%kernel.root_dir%/../src/AppBundle/
Resources/config/doctrine/Sale'

109.
src
!"" AppBundle
# !"" Controller
# !"" Entity
# %"" Resources
# %"" config
# %"" doctrine
# %"" Sale
# %"" Ticket.orm.yml
%"" TicketOffice
Ticket.orm.yml

110.
Ticket.orm.yml
TicketOfficeSaleEntityTicket:
type: entity
table: ticket
id:
id:
type: string
generator: { strategy: NONE }
fields:
customerId:
type: integer
trainNumber:
type: integer
departure:
type: datetime
seatNumber:
type: integer
PNR:
type: string

111.
TICKET REPOSITORY
s02e03

112.
src
!"" AppBundle
%"" TicketOffice
%"" Sale
%"" Entity
!"" Ticket.php
%"" TicketRepository.php
TicketRepository.php

113.
TicketRepository.php
interface TicketRepository
{
public function save(Ticket $ticket);
/**
* @param $id
* @return Ticket
*/
public function findById($id);
}

114.
src
!"" AppBundle
# !"" Controller
# !"" Entity
# # %"" DoctrineTicketRepository.php
# %"" Resources
%"" TicketOffice
DoctrineTicketRepository.php

115.
DoctrineTicketRepository.php
class DoctrineTicketRepository implements TicketRepository
{
private $entityRepository;
private $entityManager;
public function __construct(EntityManager $entityManager)
{
$this->entityManager = $entityManager;
$this->entityRepository =
$this->entityManager->getRepository('AppSale:Ticket');
}
public function save(Ticket $ticket)
{
$this->entityManager->persist($ticket);
$this->entityManager->flush();
}
public function findById($id)
{
return $this->entityRepository->find($id);
}
}

116.
DoctrineTicketRepository.php
class DoctrineTicketRepository implements TicketRepository
{
private $entityRepository;
private $entityManager;
public function __construct(EntityManager $entityManager)
{
$this->entityManager = $entityManager;
$this->entityRepository =
$this->entityManager->getRepository('AppSale:Ticket');
}
public function save(Ticket $ticket)
{
$this->entityManager->persist($ticket);
$this->entityManager->flush();
}
public function findById($id)
{
return $this->entityRepository->find($id);
}
}
implements TicketRepository

117.
DoctrineTicketRepository.php
class DoctrineTicketRepository implements TicketRepository
{
private $entityRepository;
private $entityManager;
public function __construct(EntityManager $entityManager)
{
$this->entityManager = $entityManager;
$this->entityRepository =
$this->entityManager->getRepository('AppSale:Ticket');
}
public function save(Ticket $ticket)
{
$this->entityManager->persist($ticket);
$this->entityManager->flush();
}
public function findById($id)
{
return $this->entityRepository->find($id);
}
}

118.
app
!"" DoctrineMigrations
!"" Resources
%"" config
%"" services.yml
services.yml

119.
services:
ticket_office.sale.entity.ticket_repository:
class: AppBundleEntityDoctrineTicketRepository
arguments: ["@doctrine.orm.default_entity_manager"]
services.yml

120.
SERVIZI
s02e04

121.
src
!"" AppBundle
%"" TicketOffice
%"" Sale
!"" Entity
%"" Service
%"" SeatPicker.php
SeatPicker.php

122.
class SeatPicker
{
public function pick($trainNumber, $departure)
{
return rand(1, 1000);
}
}
SeatPicker.php

123.
src
!"" AppBundle
%"" TicketOffice
%"" Sale
!"" Entity
%"" Service
!"" PNRGenerator.php
%"" SeatPicker.php
PNRGenerator.php

124.
class PNRGenerator
{
public function generate(
$trainNumber,
$departure,
$seatNumber
) {
return uniqid();
}
}
PNRGenerator.php

125.
app
!"" DoctrineMigrations
!"" Resources
%"" config
%"" services.yml
services.yml

126.
services:
ticket_office.sale.seat_picker:
class: TicketOfficeSaleServiceSeatPicker
ticket_office.sale.pnr_generator:
class: TicketOfficeSaleServicePNRGenerator
services.yml

127.
IL PRIMO COMANDO
s02e05

128.
SIMPLE BUS

129.
composer require simple-bus/symfony-bridge
@command_bus
@event_bus

130.
AppKernel.php
public function registerBundles()
{
$bundles = [
//...
new SimpleBusSymfonyBridgeSimpleBusCommandBusBundle(),
new SimpleBusSymfonyBridgeSimpleBusEventBusBundle(),
];
//...
}

131.
src
!"" AppBundle
%"" TicketOffice
%"" Sale
!"" Command
# %"" SellTicket.php
!"" Entity
%"" Service
SellTicket.php

132.
SellTicket.php
class SellTicket
{
//private properties declaration...
public function __construct(
$id, $customerId, $trainNumber, $departure
) {
$this->id = $id;
$this->customerId = $customerId;
$this->trainNumber = $trainNumber;
$this->departure = $departure;
}
public function getCustomerId() {...}
public function getTrainNumber() {...}
public function getDeparture() {...}
public function getId() {...}
}

133.
src
!"" AppBundle
%"" TicketOffice
%"" Sale
!"" Command
# !"" SellTicket.php
# %"" SellTicketHandler.php
!"" Entity
%"" Service
SellTicketHandler.php

134.
SellTicketHandler.php
class SellTicketHandler
{
//private properties declaration...
public function __construct(
SeatPicker $seatPicker,
PNRGenerator $PNRGenerator,
TicketRepository $ticketRepository
) {
$this->seatPicker = $seatPicker;
$this->PNRGenerator = $PNRGenerator;
$this->ticketRepository = $ticketRepository;
}
}

135.
SellTicketHandler.php
class SellTicketHandler
{
//private properties declaration...
public function __construct(
SeatPicker $seatPicker,
PNRGenerator $PNRGenerator,
TicketRepository $ticketRepository
) {
$this->seatPicker = $seatPicker;
$this->PNRGenerator = $PNRGenerator;
$this->ticketRepository = $ticketRepository;
}
}
TicketRepository $ticketRepository

136.
SellTicketHandler.php
public function handle(SellTicket $command)
{
$seat = $this->seatPicker->pick(
$command->getTrainNumber(), $command->getDeparture()
);
$pnr = $this->PNRGenerator->generate(
$command->getTrainNumber(), $command->getDeparture(),
$seat
);
$ticket = new Ticket(
$command->getId(),
$command->getCustomerId(),
$command->getTrainNumber(),
$command->getDeparture(),
$seat,
$pnr
);
$this->ticketRepository->save($ticket);
}

137.
SellTicketHandler.php
public function handle(SellTicket $command)
{
$seat = $this->seatPicker->pick(
$command->getTrainNumber(), $command->getDeparture()
);
$pnr = $this->PNRGenerator->generate(
$command->getTrainNumber(), $command->getDeparture(),
$seat
);
$ticket = new Ticket(
$command->getId(),
$command->getCustomerId(),
$command->getTrainNumber(),
$command->getDeparture(),
$seat,
$pnr
);
$this->ticketRepository->save($ticket);
}
public function handle(SellTicket $command)

138.
SellTicketHandler.php
public function handle(SellTicket $command)
{
$seat = $this->seatPicker->pick(
$command->getTrainNumber(), $command->getDeparture()
);
$pnr = $this->PNRGenerator->generate(
$command->getTrainNumber(), $command->getDeparture(),
$seat
);
$ticket = new Ticket(
$command->getId(),
$command->getCustomerId(),
$command->getTrainNumber(),
$command->getDeparture(),
$seat,
$pnr
);
$this->ticketRepository->save($ticket);
}
$seat = $this->seatPicker->pick(
$command->getTrainNumber(), $command->getDeparture()
);

139.
SellTicketHandler.php
public function handle(SellTicket $command)
{
$seat = $this->seatPicker->pick(
$command->getTrainNumber(), $command->getDeparture()
);
$pnr = $this->PNRGenerator->generate(
$command->getTrainNumber(), $command->getDeparture(),
$seat
);
$ticket = new Ticket(
$command->getId(),
$command->getCustomerId(),
$command->getTrainNumber(),
$command->getDeparture(),
$seat,
$pnr
);
$this->ticketRepository->save($ticket);
}
$pnr = $this->PNRGenerator->generate(
$command->getTrainNumber(), $command->getDeparture(),
$seat
);

140.
SellTicketHandler.php
public function handle(SellTicket $command)
{
$seat = $this->seatPicker->pick(
$command->getTrainNumber(), $command->getDeparture()
);
$pnr = $this->PNRGenerator->generate(
$command->getTrainNumber(), $command->getDeparture(),
$seat
);
$ticket = new Ticket(
$command->getId(),
$command->getCustomerId(),
$command->getTrainNumber(),
$command->getDeparture(),
$seat,
$pnr
);
$this->ticketRepository->save($ticket);
}
$ticket = new Ticket(
$command->getId(),
$command->getCustomerId(),
$command->getTrainNumber(),
$command->getDeparture(),
$seat,
$pnr
);

141.
SellTicketHandler.php
public function handle(SellTicket $command)
{
$seat = $this->seatPicker->pick(
$command->getTrainNumber(), $command->getDeparture()
);
$pnr = $this->PNRGenerator->generate(
$command->getTrainNumber(), $command->getDeparture(),
$seat
);
$ticket = new Ticket(
$command->getId(),
$command->getCustomerId(),
$command->getTrainNumber(),
$command->getDeparture(),
$seat,
$pnr
);
$this->ticketRepository->save($ticket);
}
$this->ticketRepository->save($ticket);

142.
app
!"" DoctrineMigrations
!"" Resources
%"" config
%"" services.yml
services.yml

143.
services.yml
services:
ticket_office.commands.sell_ticket_handler:
class: TicketOfficeSaleCommandSellTicketHandler
arguments:
- "@ticket_office.sale.seat_picker"
- "@ticket_office.sale.pnr_generator"
- "@ticket_office.sale.entity.ticket_repository"
tags:
- { name: command_handler,
handles: TicketOfficeSaleCommandSellTicket }

144.
services.yml
services:
ticket_office.commands.sell_ticket_handler:
class: TicketOfficeSaleCommandSellTicketHandler
arguments:
- "@ticket_office.sale.seat_picker"
- "@ticket_office.sale.pnr_generator"
- "@ticket_office.sale.entity.ticket_repository"
tags:
- { name: command_handler,
handles: TicketOfficeSaleCommandSellTicket }
- "@ticket_office.sale.entity.ticket_repository"

145.
services.yml
services:
ticket_office.commands.sell_ticket_handler:
class: TicketOfficeSaleCommandSellTicketHandler
arguments:
- "@ticket_office.sale.seat_picker"
- "@ticket_office.sale.pnr_generator"
- "@ticket_office.sale.entity.ticket_repository"
tags:
- { name: command_handler,
handles: TicketOfficeSaleCommandSellTicket }
tags:
- { name: command_handler,
handles: TicketOfficeSaleCommandSellTicket }

146.
CONTROLLER
s02e06

147.
src
!"" AppBundle
# !"" Controller
# # %"" TicketController.php
# !"" Entity
# %"" Resources
%"" TicketOffice
TicketController.php

148.
TicketController.php
/**
* @Route("tickets/new", name="tickets.new")
*/
public function sellTicketAction(Request $request)
{
$id = Uuid::uuid4();
$command = new SellTicket(
$id,
$request->get('customerId'),
$request->get('trainNumber'),
new DateTime($request->get('departure'))
);
$this->get('command_bus')->handle($command);
return new JsonResponse(['id' => $id], 201);
}

149.
TicketController.php
/**
* @Route("tickets/new", name="tickets.new")
*/
public function sellTicketAction(Request $request)
{
$id = Uuid::uuid4();
$command = new SellTicket(
$id,
$request->get('customerId'),
$request->get('trainNumber'),
new DateTime($request->get('departure'))
);
$this->get('command_bus')->handle($command);
return new JsonResponse(['id' => $id], 201);
}
$id = Uuid::uuid4();

150.
TicketController.php
/**
* @Route("tickets/new", name="tickets.new")
*/
public function sellTicketAction(Request $request)
{
$id = Uuid::uuid4();
$command = new SellTicket(
$id,
$request->get('customerId'),
$request->get('trainNumber'),
new DateTime($request->get('departure'))
);
$this->get('command_bus')->handle($command);
return new JsonResponse(['id' => $id], 201);
}
$command = new SellTicket(
$id,
$request->get('customerId'),
$request->get('trainNumber'),
new DateTime($request->get('departure'))
);

151.
TicketController.php
/**
* @Route("tickets/new", name="tickets.new")
*/
public function sellTicketAction(Request $request)
{
$id = Uuid::uuid4();
$command = new SellTicket(
$id,
$request->get('customerId'),
$request->get('trainNumber'),
new DateTime($request->get('departure'))
);
$this->get('command_bus')->handle($command);
return new JsonResponse(['id' => $id], 201);
}
$this->get('command_bus')->handle($command);

152.
TicketController.php
/**
* @Route("tickets/new", name="tickets.new")
*/
public function sellTicketAction(Request $request)
{
$id = Uuid::uuid4();
$command = new SellTicket(
$id,
$request->get('customerId'),
$request->get('trainNumber'),
new DateTime($request->get('departure'))
);
$this->get('command_bus')->handle($command);
return new JsonResponse(['id' => $id], 200);
}
return new JsonResponse(['id' => $id], 201);

153.
CUSTOMER
s02e07

154.
src
!"" AppBundle
%"" TicketOffice
%"" Sale
!"" Command
!"" Entity
# !"" Customer.php
# !"" Ticket.php
# %"" TicketRepository.php
%"" Service
Customer.php

155.
Customer.php
class Customer
{
private $id;
private $email;
public function __construct($id, $email)
{
$this->id = $id;
$this->email = $email;
}
public function getId() {...}
public function getEmail() {...}
}

156.
src
!"" AppBundle
# !"" Controller
# !"" Entity
# %"" Resources
# %"" config
# %"" doctrine
# %"" Sale
# %"" Customer.orm.yml
%"" TicketOffice
Customer.orm.yml

157.
Customer.orm.yml
TicketOfficeSaleEntityCustomer:
type: entity
table: customer
id:
id:
type: integer
generator: { strategy: AUTO }
fields:
email:
type: string

158.
src
!"" AppBundle
%"" TicketOffice
%"" Sale
!"" Command
!"" Entity
# !"" Customer.php
# !"" CustomerRepository.php
# !"" Ticket.php
# %"" TicketRepository.php
%"" Service
CustomerRepository.php

159.
CustomerRepository.php
interface CustomerRepository
{
/**
* @param $id
* @return Customer
*/
public function findById($id);
}

160.
src
!"" AppBundle
# !"" Controller
# !"" Entity
# # %"" DoctrineCustomerRepository.php
# %"" Resources
%"" TicketOffice
DoctrineCustomerRepository.php

161.
DoctrineCustomerRepository.php
class DoctrineCustomerRepository implements CustomerRepository
{
private $entityRepository;
private $entityManager;
public function __construct(EntityManager $entityManager)
{
$this->entityManager = $entityManager;
$this->entityRepository =
$this->entityManager->getRepository('AppSale:Customer');
}
public function findById($id)
{
return $this->entityRepository->find($id);
}
}

162.
IL PRIMO EVENTO
s02e08

163.
src
!"" AppBundle
%"" TicketOffice
%"" Sale
!"" Command
!"" Entity
!"" Event
# %"" TicketSold.php
%"" Service
TicketSold.php

164.
TicketSold.php
class TicketSold
{
//private properties declarations...
public function __construct($trainNumber, $customerId, $ticketId)
{
$this->trainNumber = $trainNumber;
$this->customerId = $customerId;
$this->ticketId = $ticketId;
}
public function getCustomerId() {...}
public function getTicketId() {...}
public function getTrainNumber() {...}
}

165.
SellTicketHandler.php
class SellTicketHandler
{
//private properties declarations...
public function __construct(
SeatPicker $seatPicker,
PNRGenerator $PNRGenerator,
TicketRepository $ticketRepository,
MessageBus $eventBus
) {
$this->seatPicker = $seatPicker;
$this->PNRGenerator = $PNRGenerator;
$this->ticketRepository = $ticketRepository;
$this->eventBus = $eventBus;
}
}

166.
SellTicketHandler.php
class SellTicketHandler
{
//private properties declarations...
public function __construct(
SeatPicker $seatPicker,
PNRGenerator $PNRGenerator,
TicketRepository $ticketRepository,
MessageBus $eventBus
) {
$this->seatPicker = $seatPicker;
$this->PNRGenerator = $PNRGenerator;
$this->ticketRepository = $ticketRepository;
$this->eventBus = $eventBus;
}
}
MessageBus $eventBus
$this->eventBus = $eventBus;

167.
SellTicketHandler.php
public function handle(SellTicket $command)
{
$seat = $this->seatPicker->pick(...);
$pnr = $this->PNRGenerator->generate(...);
$ticket = new Ticket(...);
$this->ticketRepository->save($ticket);
$event = new TicketSold(
$command->getTrainNumber(),
$command->getCustomerId(),
$command->getId()
);
$this->eventBus->handle($event);
}

168.
SellTicketHandler.php
public function handle(SellTicket $command)
{
$seat = $this->seatPicker->pick(...);
$pnr = $this->PNRGenerator->generate(...);
$ticket = new Ticket(...);
$this->ticketRepository->save($ticket);
$event = new TicketSold(
$command->getTrainNumber(),
$command->getCustomerId(),
$command->getId()
);
$this->eventBus->handle($event);
}
$event = new TicketSold(
$command->getTrainNumber(),
$command->getCustomerId(),
$command->getId()
);

169.
SellTicketHandler.php
public function handle(SellTicket $command)
{
$seat = $this->seatPicker->pick(...);
$pnr = $this->PNRGenerator->generate(...);
$ticket = new Ticket(...);
$this->ticketRepository->save($ticket);
$event = new TicketSold(
$command->getTrainNumber(),
$command->getCustomerId(),
$command->getId()
);
$this->eventBus->handle($event);
}
$this->eventBus->handle($event);

170.
I SUBSCRIBER
s02e09

171.
src
!"" AppBundle
%"" TicketOffice
%"" Sale
!"" Command
!"" Entity
!"" Event
!"" Service
%"" Subscriber
%"" SendEmailWhenTicketSold.php
SendEmailWhenTicketSold.php

172.
SendEmailWhenTicketSold.php
class SendEmailWhenTicketSold
{
private $mailer;
private $ticketRepository;
private $customerRepository;
public function __construct(
Mailer $mailer,
TicketRepository $ticketRepository,
CustomerRepository $customerRepository
) {
$this->mailer = $mailer;
$this->ticketRepository = $ticketRepository;
$this->customerRepository = $customerRepository;
}
public function notify(...) {...}
}

173.
SendEmailWhenTicketSold.php
class SendEmailWhenTicketSold
{
private $mailer;
private $ticketRepository;
private $customerRepository;
public function __construct(
Mailer $mailer,
TicketRepository $ticketRepository,
CustomerRepository $customerRepository
) {
$this->mailer = $mailer;
$this->ticketRepository = $ticketRepository;
$this->customerRepository = $customerRepository;
}
public function notify(...) {...}
}
TicketRepository $ticketRepository,
CustomerRepository $customerRepository

174.
SendEmailWhenTicketSold.php
public function notify(TicketSold $event)
{
$customer =
$this->customerRepository->findById(
$event->getCustomerId()
);
$mailMessage = $this->mailer->createMessage();
$mailMessage->setTo($customer->getEmail());
$mailMessage->setSubject('Dettagli biglietto');
$mailMessage->setFrom($this->sender_address);
$mailMessage->setBody($body,
sprintf(
'Hai acquistato il biglietto %s
per il treno %s',
$event->getTicketId(),
$event->getTrainNumber()
);
$this->mailer->send($mailMessage);
}

175.
SendEmailWhenTicketSold.php
public function notify(TicketSold $event)
{
$customer =
$this->customerRepository->findById(
$event->getCustomerId()
);
$mailMessage = $this->mailer->createMessage();
$mailMessage->setTo($customer->getEmail());
$mailMessage->setSubject('Dettagli biglietto');
$mailMessage->setFrom($this->sender_address);
$mailMessage->setBody($body,
sprintf(
'Hai acquistato il biglietto %s
per il treno %s',
$event->getTicketId(),
$event->getTrainNumber()
);
$this->mailer->send($mailMessage);
}
TicketSold $event

176.
SendEmailWhenTicketSold.php
public function notify(TicketSold $event)
{
$customer =
$this->customerRepository->findById(
$event->getCustomerId()
);
$mailMessage = $this->mailer->createMessage();
$mailMessage->setTo($customer->getEmail());
$mailMessage->setSubject('Dettagli biglietto');
$mailMessage->setFrom($this->sender_address);
$mailMessage->setBody($body,
sprintf(
'Hai acquistato il biglietto %s
per il treno %s',
$event->getTicketId(),
$event->getTrainNumber()
);
$this->mailer->send($mailMessage);
}
$customer =
$this->customerRepository->findById(
$event->getCustomerId()
);

177.
SendEmailWhenTicketSold.php
public function notify(TicketSold $event)
{
$customer =
$this->customerRepository->findById(
$event->getCustomerId()
);
$mailMessage = $this->mailer->createMessage();
$mailMessage->setTo($customer->getEmail());
$mailMessage->setSubject('Dettagli biglietto');
$mailMessage->setFrom($this->sender_address);
$mailMessage->setBody($body,
sprintf(
'Hai acquistato il biglietto %s
per il treno %s',
$event->getTicketId(),
$event->getTrainNumber()
);
$this->mailer->send($mailMessage);
}
$mailMessage = $this->mailer->createMessage();
$mailMessage->setTo($customer->getEmail());
$mailMessage->setSubject('Dettagli biglietto');
$mailMessage->setFrom($this->sender_address);
$mailMessage->setBody($body,
sprintf(
'Hai acquistato il biglietto %s
per il treno %s',
$event->getTicketId(),
$event->getTrainNumber()
);

178.
SendEmailWhenTicketSold.php
public function notify(TicketSold $event)
{
$customer =
$this->customerRepository->findById(
$event->getCustomerId()
);
$mailMessage = $this->mailer->createMessage();
$mailMessage->setTo($customer->getEmail());
$mailMessage->setSubject('Dettagli biglietto');
$mailMessage->setFrom($this->sender_address);
$mailMessage->setBody($body,
sprintf(
'Hai acquistato il biglietto %s
per il treno %s',
$event->getTicketId(),
$event->getTrainNumber()
);
$this->mailer->send($mailMessage);
}
$this->mailer->send($mailMessage);

179.
app
!"" DoctrineMigrations
!"" Resources
%"" config
%"" services.yml
services.yml

180.
services.yml
ticket_office.sale.subscriber.send_email_when_ticket_sold:
class:
TicketOfficeSaleSubscriberSendEmailWhenTicketSold
arguments:
- "@mailer"
- "@ticket_office.sale.entity.ticket_repository"
- "@ticket_office.sale.entity.customer_repository"
tags:
- { name: event_subscriber,
subscribes_to: TicketOfficeSaleEventTicketSold }

181.
services.yml
ticket_office.sale.subscriber.send_email_when_ticket_sold:
class:
TicketOfficeSaleSubscriberSendEmailWhenTicketSold
arguments:
- "@mailer"
- "@ticket_office.sale.entity.ticket_repository"
- "@ticket_office.sale.entity.customer_repository"
tags:
- { name: event_subscriber,
subscribes_to: TicketOfficeSaleEventTicketSold }
tags:
- { name: event_subscriber,
subscribes_to: TicketOfficeSaleEventTicketSold }

182.
src
!"" AppBundle
%"" TicketOffice
%"" Sale
!"" Command
!"" Entity
!"" Event
!"" Service
%"" Subscriber
!"" SendEmailWhenTicketSold.php
%"" SendPNRWhenTicketSold.php
SendPNRWhenTicketSold.php

183.
SendPNRWhenTicketSold.php
class SendPNRWhenTicketSold
{
public function __construct(
SMSGateway $SMSGateway,
TicketRepository $ticketRepository,
CustomerRepository $customerRepository
) {
$this->SMSGateway = $SMSGateway;
$this->ticketRepository = $ticketRepository;
$this->customerRepository = $customerRepository;
}
public function notify(...) {...}
}

184.
SendPNRWhenTicketSold.php
public function notify(TicketSold $event)
{
$ticket =
$this->ticketRepository->findById(
$event->getTicketId()
);
$customer =
$this->customerRepository->findById(
$event->getCustomerId()
);
$this->SMSGateway->send(
$customer->getMobile(),
sprintf('Il tuo PNR è %s', $ticket->getPNR())
);
}

185.
SendPNRWhenTicketSold.php
public function notify(TicketSold $event)
{
$ticket =
$this->ticketRepository->findById(
$event->getTicketId()
);
$customer =
$this->customerRepository->findById(
$event->getCustomerId()
);
$this->SMSGateway->send(
$customer->getMobile(),
sprintf('Il tuo PNR è %s', $ticket->getPNR())
);
}
TicketSold $event

186.
SendPNRWhenTicketSold.php
public function notify(TicketSold $event)
{
$ticket =
$this->ticketRepository->findById(
$event->getTicketId()
);
$customer =
$this->customerRepository->findById(
$event->getCustomerId()
);
$this->SMSGateway->send(
$customer->getMobile(),
sprintf('Il tuo PNR è %s', $ticket->getPNR())
);
}
$ticket =
$this->ticketRepository->findById(
$event->getTicketId()
);

187.
SendPNRWhenTicketSold.php
public function notify(TicketSold $event)
{
$ticket =
$this->ticketRepository->findById(
$event->getTicketId()
);
$customer =
$this->customerRepository->findById(
$event->getCustomerId()
);
$this->SMSGateway->send(
$customer->getMobile(),
sprintf('Il tuo PNR è %s', $ticket->getPNR())
);
}
$customer =
$this->customerRepository->findById(
$event->getCustomerId()
);

188.
SendPNRWhenTicketSold.php
public function notify(TicketSold $event)
{
$ticket =
$this->ticketRepository->findById(
$event->getTicketId()
);
$customer =
$this->customerRepository->findById(
$event->getCustomerId()
);
$this->SMSGateway->send(
$customer->getMobile(),
sprintf('Il tuo PNR è %s', $ticket->getPNR())
);
}
$this->SMSGateway->send(
$customer->getMobile(),
sprintf('Il tuo PNR è %s', $ticket->getPNR())
);

189.
app
!"" DoctrineMigrations
!"" Resources
%"" config
%"" services.yml
services.yml

190.
services.yml
ticket_office.sale.subscriber.send_pnr_when_ticket_sold:
class: TicketOfficeSaleSubscriberSendPNRWhenTicketSold
arguments:
- "@logger"
- "@ticket_office.sale.entity.ticket_repository"
- "@ticket_office.sale.entity.customer_repository"
tags:
- { name: event_subscriber,
subscribes_to: TicketOfficeSaleEventTicketSold }

191.
services.yml
ticket_office.sale.subscriber.send_pnr_when_ticket_sold:
class: TicketOfficeSaleSubscriberSendPNRWhenTicketSold
arguments:
- "@logger"
- "@ticket_office.sale.entity.ticket_repository"
- "@ticket_office.sale.entity.customer_repository"
tags:
- { name: event_subscriber,
subscribes_to: TicketOfficeSaleEventTicketSold }
tags:
- { name: event_subscriber,
subscribes_to: TicketOfficeSaleEventTicketSold }

192.
ECCEZIONI
s02e10

193.
TicketController.php
/**
* @Route("tickets/new", name="tickets.new")
*/
public function sellTicketAction(Request $request)
{
$id = Uuid::uuid4();
$command = new SellTicket(
$id,
$request->get('customerId'),
$request->get('trainNumber'),
new DateTime($request->get('departure'))
);
$this->get('command_bus')->handle($command);
return new JsonResponse(['id' => $id], 201);
}

194.
TicketController.php
/**
* @Route("tickets/new", name="tickets.new")
*/
public function sellTicketAction(Request $request)
{
$id = Uuid::uuid4();
$command = new SellTicket(
$id,
$request->get('customerId'),
$request->get('trainNumber'),
new DateTime($request->get('departure'))
);
$this->get('command_bus')->handle($command);
return new JsonResponse(['id' => $id], 201);
}
$this->get('command_bus')->handle($command);

195.
TicketController.php
/**
* @Route("tickets/new", name="tickets.new")
*/
public function sellTicketAction(Request $request)
{
$id = Uuid::uuid4();
$command = new SellTicket(
$id,
$request->get('customerId'),
$request->get('trainNumber'),
new DateTime($request->get('departure'))
);
$this->get('command_bus')->handle($command);
return new JsonResponse(['id' => $id], 200);
}
return new JsonResponse(['id' => $id], 201);

196.
src
!"" AppBundle
!"" Basic
# %"" TicketOfficeException.php
%"" TicketOffice
TicketOfficeException.php

197.
TicketOfficeException.php
class TicketOfficeException extends Exception
{
public static function createWithDetails($details)
{
$e = new static();
$e->setDetails($details);
return $e;
}
public function toArray()
{
$a['error']['code'] = $this->getCode();
$a['error']['message'] = $this->getMessage();
$a['error']['details'] = $this->getDetails();
return $a;
}
public function toJson()
{
return json_encode($this->toArray());
}
public function setDetails($details) {...}
public function getDetails() {...}
}

198.
src
!"" AppBundle
!"" Basic
%"" TicketOffice
%"" Sale
!"" Command
!"" Entity
!"" Event
!"" Exception
# %"" CustomerNotAllowedException.php
!"" Service
%"" Subscriber
CustomerNotAllowedException.php

199.
CustomerNotAllowedException.php
class CustomerNotAllowedException extends TicketOfficeException
{
protected $code = 666;
protected $message =
'Customer is not allowed to use this service.';
}

200.
SellTicketHandler.php
public function handle(SellTicket $command)
{
if ($command->getCustomerId() == 42) {
throw new CustomerNotAllowedException();
}
$seat = $this->seatPicker->pick(...);
$pnr = $this->PNRGenerator->generate(...);
$ticket = new Ticket(...);
$this->ticketRepository->save($ticket);
$event = new TicketSold(...);
$this->eventBus->handle($event);
}

201.
SellTicketHandler.php
public function handle(SellTicket $command)
{
if ($command->getCustomerId() == 42) {
throw new CustomerNotAllowedException();
}
$seat = $this->seatPicker->pick(...);
$pnr = $this->PNRGenerator->generate(...);
$ticket = new Ticket(...);
$this->ticketRepository->save($ticket);
$event = new TicketSold(...);
$this->eventBus->handle($event);
}
if ($command->getCustomerId() == 42) {
throw new CustomerNotAllowedException();
}

202.
TicketController.php
public function sellTicketAction(Request $request)
{
$id = Uuid::uuid4();
$command = new SellTicket(
$id,
$request->get('customerId'),
$request->get('trainNumber'),
new DateTime($request->get('departure'))
);
try {
$this->get('command_bus')->handle($command);
return new JsonResponse(['id' => $id], 201);
} catch (CustomerNotAllowedException $e) {
return new Response($e->toJson(), 400);
}
}

203.
TicketController.php
public function createTicketAction(Request $request)
{
$id = Uuid::uuid4();
$command = new SellTicket(
$id,
$request->get('customerId'),
$request->get('trainNumber'),
new DateTime($request->get('departure'))
);
try {
$this->get('command_bus')->handle($command);
return new JsonResponse(['id' => $id], 201);
} catch (CustomerNotAllowedException $e) {
return new Response($e->toJson(), 400);
}
}
try {
$this->get('command_bus')->handle($command);
return new JsonResponse(['id' => $id], 201);
} catch (CustomerNotAllowedException $e) {
return new Response($e->toJson(), 400);
}

204.
TicketController.php
public function createTicketAction(Request $request)
{
$id = Uuid::uuid4();
$command = new SellTicket(
$id,
$request->get('customerId'),
$request->get('trainNumber'),
new DateTime($request->get('departure'))
);
try {
$this->get('command_bus')->handle($command);
return new JsonResponse(['id' => $id], 201);
} catch (CustomerNotAllowedException $e) {
return new Response($e->toJson(), 400);
}
}
try {
} catch (CustomerNotAllowedException $e) {
return new Response($e->toJson(), 400);
}

205.
FINE SECONDA STAGIONE

206.
RIEPILOGO

207.
COMMAND
‣Si usa per muovere il dominio
‣Va a buon fine per definizione
‣Non restituisce nessun risultato

208.
COMMAND HANDLER
‣ Gestisce il comando
‣ Effettua validazioni di dominio
‣ Muove concretamente il dominio
‣ Solleva eccezioni in caso di problemi

209.
EVENT
‣ Viene sollevato a fronte di qualcosa accaduto nel
dominio (es: UserRegistered)
‣ Contiene informazioni arbitrarie

210.
SUBSCRIBER
‣ Viene usato per eseguire azioni in risposta a
degli eventi
‣ Non può muovere il dominio, al massimo
inoltra la richiesta ad un comando
‣ Può operare autonomamente se la sua azione
è destinata all'esterno del dominio

211.
EPILOGO

212.
Giulia ha continuato
a chiedere nuove
funzionalità perché
un software non è
mai finito

213.
Roberto ha potuto
implementarle
senza scrivere
controller o servizi
di 2000 righe

214.
I comandi, gli eventi
e i subscriber sono
piccoli e perciò
facilmente testabili

215.
Quindi Roberto ha
potuto consegnare
nuove funzionalità
più velocemente e
con meno errori

216.
(anche) grazie al
software di
Roberto, l'azienda
di Giulia prospera e
vende biglietti

217.
GRAZIE!

218.
Francesco Face
@magobaol

219.
Francesco Face
@magobaol
Senior Developer

220.
Francesco Face
@magobaol
Senior Developer

221.
Approfondimenti
A wave of command buses by Matthias Noback
http://php-and-symfony.matthiasnoback.nl/2015/01/a-wave-of-command-buses/
SimpleBus Library
http://simplebus.github.io/MessageBus/
Martin Eckardt Bachelor Thesis on CQRS and Event Sourcing
https://drive.google.com/file/d/0B_enB2DMKeyzbF96VjdKdjIzOHc/view
Bounded Context by Martin Fowler
https://martinfowler.com/bliki/BoundedContext.html
Ticket Office Sample Project
https://github.com/magobaol/ticket-office