Post on 23-Aug-2014
description
LARAVEL.IOA USE CASE ARCHITECTURE
Laravel.IO, A Use Case Architecture By Shawn McCool Laracon 2014 in NYC
HI, I’M SHAWN
Laravel.IO, A Use Case Architecture By Shawn McCool Laracon 2014 in NYC
LARAVEL.IO ORIGIN
Laravel.IO, A Use Case Architecture By Shawn McCool Laracon 2014 in NYC
Laravel.IO Now
LARAVEL.IO FORUM
from Nick Spelt and myself
LIONA (LioBot)
from Sam Evaskitas and Matthew Machuga
LARAVEL WEEKLY NEWSLETTER
by Dries Vints
PODCAST
http://bit.ly/laravelio-podcast
Assets available for contribution at: https://github.com/LaravelIO
Laravel.IO, A Use Case Architecture By Shawn McCool Laracon 2014 in NYC
AKA ENGINEERINGMANAGING COMPLEXITY
Laravel.IO, A Use Case Architecture By Shawn McCool Laracon 2014 in NYC
FUNCTIONAL REQUIREMENTS
Laravel.IO, A Use Case Architecture By Shawn McCool Laracon 2014 in NYC
USE CASES
Laravel.IO, A Use Case Architecture By Shawn McCool Laracon 2014 in NYC
ENTITIES
Many objects are not fundamentally defined by their attributes,
but rather by a thread of continuity and identity.
- Eric Evans
“
Laravel.IO, A Use Case Architecture By Shawn McCool Laracon 2014 in NYC
PeoplePERSON
Laravel.IO, A Use Case Architecture By Shawn McCool Laracon 2014 in NYC
Jane Doe
People
Jane Doe
PERSON
Laravel.IO, A Use Case Architecture By Shawn McCool Laracon 2014 in NYC
Jane Doe
People
Jane DoeJane Doe
PERSON
Jane Doe
Laravel.IO, A Use Case Architecture By Shawn McCool Laracon 2014 in NYC
Jane Doe
PERSON
Age: 27
Jane Doe
Age: 27
Laravel.IO, A Use Case Architecture By Shawn McCool Laracon 2014 in NYC
Jane Doe
PERSON
Age: 27
From: NYC
Jane Doe
Age: 27
From: NYC
Laravel.IO, A Use Case Architecture By Shawn McCool Laracon 2014 in NYC
THE ACTIVERECORD PATTERN
Laravel.IO, A Use Case Architecture By Shawn McCool Laracon 2014 in NYC
ID: 1 ID: 2
Jane Doe
PERSON
Age: 27
From: NYC
Jane Doe
Age: 27
From: NYC
People Table
ID
1
2
Age
27
27
From
NYC
NYC
Name
Jane Doe
Jane Doe
Laravel.IO, A Use Case Architecture By Shawn McCool Laracon 2014 in NYC
ENTITIES AND ACTIVERECORD
Laravel.IO, A Use Case Architecture By Shawn McCool Laracon 2014 in NYC
THIS IS NOT DDD
Laravel.IO, A Use Case Architecture By Shawn McCool Laracon 2014 in NYC
LAYERED ARCHITECTURE
Laravel.IO, A Use Case Architecture By Shawn McCool Laracon 2014 in NYC
A COMMON APPLICATION
PRESENTATION LAYER
Controllers
Artisan Commands
Queue Listeners
Laravel.IO, A Use Case Architecture By Shawn McCool Laracon 2014 in NYC
PRESENTATION LAYER
Controllers
Artisan Commands
Queue Listeners
DOMAIN
Entities
Repository Interfaces
A COMMON APPLICATION
Laravel.IO, A Use Case Architecture By Shawn McCool Laracon 2014 in NYC
PRESENTATION LAYER
Controllers
Artisan Commands
Queue Listeners
SERVICE LAYER
Sending Email
Queueing up Jobs
Repository Implementations
DOMAIN
Entities
Repository Interfaces
A COMMON APPLICATION
Laravel.IO, A Use Case Architecture By Shawn McCool Laracon 2014 in NYC
PRESENTATION LAYER
Controllers
Artisan Commands
Queue Listeners
SERVICE LAYER
Sending Email
Queueing up Jobs
Repository Implementations
Commands / Command Bus
DOMAIN
Entities
Repository Interfaces
A COMMON APPLICATION
Laravel.IO, A Use Case Architecture By Shawn McCool Laracon 2014 in NYC
A COMMAND ORIENTED INTERFACE
Laravel.IO, A Use Case Architecture By Shawn McCool Laracon 2014 in NYC
MEAT OF THE APPLICATION
WHAT IS A COMMAND
Laravel.IO, A Use Case Architecture By Shawn McCool Laracon 2014 in NYC
Controller
Artisan Command
Queue Worker
Whatever
MEAT OF THE APPLICATION
WHAT IS A COMMAND
Laravel.IO, A Use Case Architecture By Shawn McCool Laracon 2014 in NYC
WHAT IS A COMMAND
MEAT OF THE APPLICATIONREGISTER MEMBER COMMAND
Laravel.IO, A Use Case Architecture By Shawn McCool Laracon 2014 in NYC
WHAT IS A COMMAND
MEAT OF THE APPLICATIONREGISTER MEMBER COMMAND
Laravel.IO, A Use Case Architecture By Shawn McCool Laracon 2014 in NYC
WHAT IS A COMMAND
REGISTER MEMBER COMMAND
MEAT OF THE APPLICATION
Laravel.IO, A Use Case Architecture By Shawn McCool Laracon 2014 in NYC
Some Advantages
- No business policy in your controllers
- Your code shows intent
- A single dedicated flow per use case
- A single point of entry per use case
- Easy to see which use cases are implemented
Laravel.IO, A Use Case Architecture By Shawn McCool Laracon 2014 in NYC
COMMAND ANATOMY
class RegisterMemberCommand{ public $displayName; public $email; public $password;
public function __construct($displayName, $email, $password) { $this->displayName = $displayName; $this->email = $email; $this->password = $password; }}
class RegisterMemberCommand{ public $displayName; public $email; public $password;
public function __construct($displayName, $email, $password) { $this->displayName = $displayName; $this->email = $email; $this->password = $password; }}
Laravel.IO, A Use Case Architecture By Shawn McCool Laracon 2014 in NYC
WHAT IS HAPPENING INSIDE?
MEAT OF THE APPLICATION
REGISTER MEMBER COMMAND
Laravel.IO, A Use Case Architecture By Shawn McCool Laracon 2014 in NYC
THE FINAL DESTINATION
MEAT OF THE APPLICATION
REGISTER MEMBER HANDLER
REGISTER MEMBER COMMAND
Laravel.IO, A Use Case Architecture By Shawn McCool Laracon 2014 in NYC
THE FINAL DESTINATION
MEAT OF THE APPLICATION
?REGISTER MEMBER COMMAND
REGISTER MEMBER HANDLER
Laravel.IO, A Use Case Architecture By Shawn McCool Laracon 2014 in NYC
THE TRANSPORT MECHANISM
MEAT OF THE APPLICATION
COMMAND BUSREGISTER MEMBER COMMAND
REGISTER MEMBER HANDLER
Laravel.IO, A Use Case Architecture By Shawn McCool Laracon 2014 in NYC
COMMAND BUS IMPLEMENTATION
class ExecutionCommandBus implements CommandBus{ private $container; private $mapper;
public function __construct(Container $container,Mapper $mapper) { $this->container = $container; $this->mapper = $mapper; }
public function execute($command) { $this->getHandler($command)->handle($command); }
private function getHandler($command) { $class = $this->mapper->getHandlerClassFor($command); return $this->container->make($class); }
}
class ExecutionCommandBus implements CommandBus{ private $container; private $mapper;
public function __construct(Container $container,Mapper $mapper) { $this->container = $container; $this->mapper = $mapper; }
public function execute($command) { $this->getHandler($command)->handle($command); }
private function getHandler($command) { $class = $this->mapper->getHandlerClassFor($command); return $this->container->make($class); }
}
class ExecutionCommandBus implements CommandBus{ private $container; private $mapper;
public function __construct(Container $container,Mapper $mapper) { $this->container = $container; $this->mapper = $mapper; }
public function execute($command) { $this->getHandler($command)->handle($command); }
private function getHandler($command) { $class = $this->mapper->getHandlerClassFor($command); return $this->container->make($class); }
}
class ExecutionCommandBus implements CommandBus{ private $container; private $mapper;
public function __construct(Container $container,Mapper $mapper) { $this->container = $container; $this->mapper = $mapper; }
public function execute($command) { $this->getHandler($command)->handle($command); }
private function getHandler($command) { $class = $this->mapper->getHandlerClassFor($command); return $this->container->make($class); }
}
class ExecutionCommandBus implements CommandBus{ private $container; private $mapper;
public function __construct(Container $container,Mapper $mapper) { $this->container = $container; $this->mapper = $mapper; }
public function execute($command) { $this->getHandler($command)->handle($command); }
private function getHandler($command) { $class = $this->mapper->getHandlerClassFor($command); return $this->container->make($class); }
}
Laravel.IO, A Use Case Architecture By Shawn McCool Laracon 2014 in NYC
HOW DOES THE MAPPER KNOW?
Laravel.IO, A Use Case Architecture By Shawn McCool Laracon 2014 in NYC
ONE HANDLER PER COMMAND
class RegisterMemberHandler implements Handler{
private $memberRepository;
public function __construct(MemberRepository $memberRepository) { $this->memberRepository = $memberRepository; }
public function handle($command) { $member = Member::register(
$command->displayName,
$command->email,
$command->password);
$this->memberRepository->save($member); }}
class RegisterMemberHandler implements Handler{
private $memberRepository;
public function __construct(MemberRepository $memberRepository) { $this->memberRepository = $memberRepository; }
public function handle($command) { $member = Member::register(
$command->displayName,
$command->email,
$command->password);
$this->memberRepository->save($member); }}
class RegisterMemberHandler implements Handler{
private $memberRepository;
public function __construct(MemberRepository $memberRepository) { $this->memberRepository = $memberRepository; }
public function handle($command) { $member = Member::register(
$command->displayName,
$command->email,
$command->password);
$this->memberRepository->save($member); }}
class RegisterMemberHandler implements Handler{
private $memberRepository;
public function __construct(MemberRepository $memberRepository) { $this->memberRepository = $memberRepository; }
public function handle($command) { $member = Member::register(
$command->displayName,
$command->email,
$command->password);
$this->memberRepository->save($member); }}
class Member extends Eloquent{ public static function register($displayName, $email, $password) { $member = new static([ 'display_name' => $displayName, 'email' => $email, 'password' => $password, ]);
return $member; }}
Laravel.IO, A Use Case Architecture By Shawn McCool Laracon 2014 in NYC
DOMAIN IMPLICATION
Laravel.IO, A Use Case Architecture By Shawn McCool Laracon 2014 in NYC
Service Layer DomainPresentation Layer
Flow Review
FLOW REVIEW
PRESENTATION LAYER
SERVICE LAYER DOMAIN
Laravel.IO, A Use Case Architecture By Shawn McCool Laracon 2014 in NYC
Service Layer DomainPresentation Layer
Command
FLOW REVIEW
PRESENTATION LAYER
SERVICE LAYER DOMAIN
COMMAND
Laravel.IO, A Use Case Architecture By Shawn McCool Laracon 2014 in NYC
Service Layer DomainPresentation Layer
Command Command Bus
FLOW REVIEW
PRESENTATION LAYER
SERVICE LAYER DOMAIN
COMMAND COMMAND BUS
Laravel.IO, A Use Case Architecture By Shawn McCool Laracon 2014 in NYC
Service Layer DomainPresentation Layer
Command Command Bus
Command Handler
FLOW REVIEW
PRESENTATION LAYER
SERVICE LAYER DOMAIN
COMMAND COMMAND BUS
COMMANDHANDLER
Laravel.IO, A Use Case Architecture By Shawn McCool Laracon 2014 in NYC
FLOW REVIEW
PRESENTATION LAYER
SERVICE LAYER DOMAIN
COMMAND COMMAND BUS
COMMANDHANDLER
ENTITIES
REPOSITORIES
Laravel.IO, A Use Case Architecture By Shawn McCool Laracon 2014 in NYC
HANDLING COMPLEX SEQUENCES
Laravel.IO, A Use Case Architecture By Shawn McCool Laracon 2014 in NYC
Member Joins
Send Welcome Email
Subscribe to MailChimp
Queue up 7 day Email
MEMBER REGISTERS
SEND WELCOME EMAIL
SUBSCRIBE TO MAILCHIMP
QUEUE UP 7 DAY EMAIL
SIMPLE SEQUENCE
Laravel.IO, A Use Case Architecture By Shawn McCool Laracon 2014 in NYC
Member Replies to Thread
Notify Subscribers
Parse for @username Tags
Send Notification Email
Add Notification Digest Queue Entry
Send No NotificationNotify Tagged Users
MEMBER REPLIES TO THREAD
NOTIFY THREAD SUBSCRIBERS
wNOTIFY TAGGED USERS
COMPLEX SEQUENCE
Laravel.IO, A Use Case Architecture By Shawn McCool Laracon 2014 in NYC
Member Replies to Thread
Notify Subscribers
Parse for @username Tags
Send Notification Email
Add Notification Digest Queue Entry
Send No NotificationNotify Tagged Users
MEMBER REPLIES TO THREAD
NOTIFY THREAD SUBSCRIBERS
wNOTIFY TAGGED USERS
COMPLEX SEQUENCE
SEND NOTIFICATION
ADD NOTIFICATION DIGEST
QUEUE ENTRY
SEND NO NOTIFICATION
Laravel.IO, A Use Case Architecture By Shawn McCool Laracon 2014 in NYC
DOMAIN EVENTS
Laravel.IO, A Use Case Architecture By Shawn McCool Laracon 2014 in NYC
TYPICAL PUB-SUB PATTERN
DISPATCH EVENTRAISE EVENT TRIGGER LISTENERS
Laravel.IO, A Use Case Architecture By Shawn McCool Laracon 2014 in NYC
PRESENTATION LAYER
Controllers
Artisan Commands
Queue Listeners
SERVICE LAYER
Sending Email
Queueing up Jobs
Repository Implementations
Commands / Command Bus
DOMAIN
Entities
Repository Interfaces
A COMMON APPLICATION
Laravel.IO, A Use Case Architecture By Shawn McCool Laracon 2014 in NYC
PRESENTATION LAYER
Controllers
Artisan Commands
Queue Listeners
SERVICE LAYER
Sending Email
Queueing up Jobs
Repository Implementations
Commands / Command Bus
Event Dispatcher
DOMAIN
Entities
Repository Interfaces
Domain Events
A COMMON APPLICATION
Laravel.IO, A Use Case Architecture By Shawn McCool Laracon 2014 in NYC
Member Joins
Send Welcome Email
Subscribe to MailChimp
Queue up 7 day Email
MEMBER REGISTERS
SEND WELCOME EMAIL
SUBSCRIBE TO MAILCHIMP
QUEUE UP 7 DAY EMAIL
DOMAIN EVENTS
Laravel.IO, A Use Case Architecture By Shawn McCool Laracon 2014 in NYC
Member Joins
Send Welcome Email
Subscribe to MailChimp
Queue up 7 day Email
MEMBER REGISTERS
SEND WELCOME EMAIL
SUBSCRIBE TO MAILCHIMP
QUEUE UP 7 DAY EMAIL
EVENT / LISTENER BREAKDOWN
Laravel.IO, A Use Case Architecture By Shawn McCool Laracon 2014 in NYC
MemberJoined
Send Welcome Email
Subscribe to MailChimp
Queue up 7 day Email
MemberRegistered
SEND WELCOME EMAIL
SUBSCRIBE TO MAILCHIMP
QUEUE UP 7 DAY EMAIL
EVENT / LISTENER BREAKDOWN
Laravel.IO, A Use Case Architecture By Shawn McCool Laracon 2014 in NYC
MemberJoined
Send Welcome Email
Subscribe to MailChimp
Queue up 7 day Email
MemberRegistered
SEND WELCOME EMAIL
SUBSCRIBE TO MAILCHIMP
QUEUE UP 7 DAY EMAIL
EVENT / LISTENER BREAKDOWN
Laravel.IO, A Use Case Architecture By Shawn McCool Laracon 2014 in NYC
MemberJoined
SendWelcomeEmail
SubscribeToMailChimp
SendOneWeekEmail
MemberRegistered
SendWelcomeMail
SubscribeToMailchimp
SendOneWeekEmail
EVENT / LISTENER BREAKDOWN
Laravel.IO, A Use Case Architecture By Shawn McCool Laracon 2014 in NYC
MemberJoined SendWelcomeEmail
SubscribeToMailChimp
SendOneWeekEmail
Events Listeners
MemberRegistered SendWelcomeMail
SendOneWeekEmail
SubscribeToMailchimp
EVENTS LISTENERS
EVENT / LISTENER BREAKDOWN
class MemberRegistered{ public $member;
public function __construct(Member $member) { $this->member = $member; }}
class SendWelcomeEmail implements Listener{ public function handle($event) { Mailer::queue(...); }}
class MemberRegistered{ public $member;
public function __construct(Member $member) { $this->member = $member; }}
class SendWelcomeEmail implements Listener{ public function handle($event) { Mailer::queue(...); }}
Laravel.IO, A Use Case Architecture By Shawn McCool Laracon 2014 in NYC
THROWING DOMAIN EVENTS
trait EventGenerator{ protected $pendingEvents = [];
protected function raise($event) { $this->pendingEvents[] = $event; }
public function releaseEvents() { $events = $this->pendingEvents; $this->pendingEvents = []; return $events; }}
trait EventGenerator{ protected $pendingEvents = [];
protected function raise($event) { $this->pendingEvents[] = $event; }
public function releaseEvents() { $events = $this->pendingEvents; $this->pendingEvents = []; return $events; }}
trait EventGenerator{ protected $pendingEvents = [];
protected function raise($event) { $this->pendingEvents[] = $event; }
public function releaseEvents() { $events = $this->pendingEvents; $this->pendingEvents = []; return $events; }}
trait EventGenerator{ protected $pendingEvents = [];
protected function raise($event) { $this->pendingEvents[] = $event; }
public function releaseEvents() { $events = $this->pendingEvents; $this->pendingEvents = []; return $events; }}
class Member extends Eloquent{ use EventGenerator;
public static function register($displayName, $email, $password) { $member = new static([ 'display_name' => $displayName, 'email' => $email, 'password' => $password, ]);
$member->raise(new MemberJoined($member));
return $member; }}
class Member extends Eloquent{ use EventGenerator;
public static function register($displayName, $email, $password) { $member = new static([ 'display_name' => $displayName, 'email' => $email, 'password' => $password, ]);
$member->raise(new MemberRegistered($member));
return $member; }}
class Member extends Eloquent{ use EventGenerator;
public static function register($displayName, $email, $password) { $member = new static([ 'display_name' => $displayName, 'email' => $email, 'password' => $password, ]);
$member->raise(new MemberRegistered($member));
return $member; }}
class Member extends Eloquent{ use EventGenerator;
public static function register($displayName, $email, $password) { $member = new static([ 'display_name' => $displayName, 'email' => $email, 'password' => $password, ]);
$member->raise(new MemberRegistered($member));
return $member; }}
class Member extends Eloquent{ use EventGenerator;
public static function register($displayName, $email, $password) { $member = new static([ 'display_name' => $displayName, 'email' => $email, 'password' => $password, ]);
$member->raise(new MemberRegistered($member));
return $member; }}
Laravel.IO, A Use Case Architecture By Shawn McCool Laracon 2014 in NYC
EVENT DISPATCHING
interface Dispatcher
{
public function addListener($eventName, Listener $listener);
public function dispatch($events);
}
// Register Listeners
$dispatcher = new Dispatcher;
$dispatcher->addListener('MemberRegistered', new SendWelcomeEmail);
$dispatcher->addListener('MemberRegistered', new SubscribeToMailchimp);
$dispatcher->addListener('MemberRegistered', new SendOneWeekEmail);
// Dispatch Events
$dispatcher->dispatch($events);
interface Dispatcher
{
public function addListener($eventName, Listener $listener);
public function dispatch($events);
}
// Register Listeners
$dispatcher = new Dispatcher;
$dispatcher->addListener('MemberRegistered', new SendWelcomeEmail);
$dispatcher->addListener('MemberRegistered’, new SubscribeToMailchimp);
$dispatcher->addListener('MemberRegistered', new SendOneWeekEmail);
// Dispatch Events
$dispatcher->dispatch($events);
interface Dispatcher
{
public function addListener($eventName, Listener $listener);
public function dispatch($events);
}
// Register Listeners
$dispatcher = new Dispatcher;
$dispatcher->addListener('MemberRegistered', new SendWelcomeEmail);
$dispatcher->addListener('MemberRegistered’, new SubscribeToMailchimp);
$dispatcher->addListener('MemberRegistered', new SendOneWeekEmail);
// Dispatch Events
$dispatcher->dispatch($events);
Laravel.IO, A Use Case Architecture By Shawn McCool Laracon 2014 in NYC
THE FULL COMMAND HANDLERHeads Up...
class RegisterMemberHandler implements Handler{ private $memberRepository; private $dispatcher;
public function __construct(MemberRepository $memberRepository,
Dispatcher $dispatcher) { $this->memberRepository = $memberRepository; $this->dispatcher = $dispatcher; }
public function handle($command) { $member = Member::register( $command->displayName, $command->email, $command->password);
$this->memberRepository->save($member); $this->dispatcher->dispatch($member->releaseEvents()); }}
class RegisterMemberHandler implements Handler{ private $memberRepository; private $dispatcher;
public function __construct(MemberRepository $memberRepository,
Dispatcher $dispatcher) { $this->memberRepository = $memberRepository; $this->dispatcher = $dispatcher; }
public function handle($command) { $member = Member::register( $command->displayName, $command->email, $command->password);
$this->memberRepository->save($member); $this->dispatcher->dispatch($member->releaseEvents()); }}
class RegisterMemberHandler implements Handler{ private $memberRepository; private $dispatcher;
public function __construct(MemberRepository $memberRepository,
Dispatcher $dispatcher) { $this->memberRepository = $memberRepository; $this->dispatcher = $dispatcher; }
public function handle($command) { $member = Member::register( $command->displayName, $command->email, $command->password);
$this->memberRepository->save($member); $this->dispatcher->dispatch($member->releaseEvents()); }}
class RegisterMemberHandler implements Handler{ private $memberRepository; private $dispatcher;
public function __construct(MemberRepository $memberRepository,
Dispatcher $dispatcher) { $this->memberRepository = $memberRepository; $this->dispatcher = $dispatcher; }
public function handle($command) { $member = Member::register( $command->displayName, $command->email, $command->password);
$this->memberRepository->save($member); $this->dispatcher->dispatch($member->releaseEvents()); }}
class RegisterMemberHandler implements Handler{ private $memberRepository; private $dispatcher;
public function __construct(MemberRepository $memberRepository,
Dispatcher $dispatcher) { $this->memberRepository = $memberRepository; $this->dispatcher = $dispatcher; }
public function handle($command) { $member = Member::register( $command->displayName, $command->email, $command->password);
$this->memberRepository->save($member); $this->dispatcher->dispatch($member->releaseEvents()); }}
class RegisterMemberHandler implements Handler{ private $memberRepository; private $dispatcher;
public function __construct(MemberRepository $memberRepository,
Dispatcher $dispatcher) { $this->memberRepository = $memberRepository; $this->dispatcher = $dispatcher; }
public function handle($command) { $member = Member::register( $command->displayName, $command->email, $command->password);
$this->memberRepository->save($member); $this->dispatcher->dispatch($member->releaseEvents()); }}
Laravel.IO, A Use Case Architecture By Shawn McCool Laracon 2014 in NYC
Member Replies to Thread
Notify Subscribers
Parse for @username Tags
Send Notification Email
Add Notification Digest Queue Entry
Send No NotificationNotify Tagged Users
MEMBER REPLIES TO THREAD
NOTIFY THREAD SUBSCRIBERS
wNOTIFY TAGGED USERS
COMPLEX SEQUENCE
SEND NOTIFICATION
ADD NOTIFICATION DIGEST
QUEUE ENTRY
SEND NO NOTIFICATION
Laravel.IO, A Use Case Architecture By Shawn McCool Laracon 2014 in NYC
Member Replies to Thread
Notify Subscribers
Parse for @username Tags
Send Notification Email
Add Notification Digest Queue Entry
Send No NotificationNotify Tagged Users
MEMBER REPLIES TO THREAD
NOTIFY THREAD SUBSCRIBERS
wNOTIFY TAGGED USERS
COMPLEX SEQUENCE
Laravel.IO, A Use Case Architecture By Shawn McCool Laracon 2014 in NYC
Member Replies to Thread
Notify Subscribers
Parse for @username Tags
Send Notification Email
Add Notification Digest Queue Entry
Send No NotificationNotify Tagged Users
MEMBER REPLIES TO THREAD
NOTIFY THREAD SUBSCRIBERS
wNOTIFY TAGGED USERS
COMPLEX SEQUENCE
Laravel.IO, A Use Case Architecture By Shawn McCool Laracon 2014 in NYC
Member Replies to Thread
Notify Subscribers
Parse for @username Tags
Send Notification Email
Add Notification Digest Queue Entry
Send No NotificationNotify Tagged Users
MemberRepliedToThread
NOTIFY THREAD SUBSCRIBERS
wNOTIFY TAGGED USERS
COMPLEX SEQUENCE
Laravel.IO, A Use Case Architecture By Shawn McCool Laracon 2014 in NYC
Member Replies to Thread
Notify Subscribers
Parse for @username Tags
Send Notification Email
Add Notification Digest Queue Entry
Send No NotificationNotify Tagged Users
MemberRepliedToThread
NOTIFY THREAD SUBSCRIBERS
NOTIFY TAGGED USERS
COMPLEX SEQUENCE
Laravel.IO, A Use Case Architecture By Shawn McCool Laracon 2014 in NYC
Member Replies to Thread
Notify Subscribers
Parse for @username Tags
Send Notification Email
Add Notification Digest Queue Entry
Send No NotificationNotify Tagged Users
MemberRepliedToThread
NotifyThreadSubscribers
NotifyTaggedUsers
COMPLEX SEQUENCE
Laravel.IO, A Use Case Architecture By Shawn McCool Laracon 2014 in NYC
Member Replies to Thread
Notify Subscribers
Parse for @username Tags
Send Notification Email
Add Notification Digest Queue Entry
Send No NotificationNotify Tagged Users
MEMBER IS NOTIFIED
COMPLEX SEQUENCE
SEND NOTIFICATION
Laravel.IO, A Use Case Architecture By Shawn McCool Laracon 2014 in NYC
Member Replies to Thread
Notify Subscribers
Parse for @username Tags
Send Notification Email
Add Notification Digest Queue Entry
Send No NotificationNotify Tagged Users
MEMBER IS NOTIFIED
COMPLEX SEQUENCE
SEND NOTIFICATION
Laravel.IO, A Use Case Architecture By Shawn McCool Laracon 2014 in NYC
Member Replies to Thread
Notify Subscribers
Parse for @username Tags
Send Notification Email
Add Notification Digest Queue Entry
Send No NotificationNotify Tagged Users
MemberNotificationSent
COMPLEX SEQUENCE
SEND NOTIFICATION
Laravel.IO, A Use Case Architecture By Shawn McCool Laracon 2014 in NYC
Member Replies to Thread
Notify Subscribers
Parse for @username Tags
Send Notification Email
Add Notification Digest Queue Entry
Send No NotificationNotify Tagged Users
MemberNotificationSent
COMPLEX SEQUENCE
SEND NOTIFICATION
Laravel.IO, A Use Case Architecture By Shawn McCool Laracon 2014 in NYC
Member Replies to Thread
Notify Subscribers
Parse for @username Tags
Send Notification Email
Add Notification Digest Queue Entry
Send No NotificationNotify Tagged Users
MemberNotificationSent
COMPLEX SEQUENCE
SendNotificationEmail
Laravel.IO, A Use Case Architecture By Shawn McCool Laracon 2014 in NYC
MemberJoined SendWelcomeEmail
SubscribeToMailChimp
SendOneWeekEmail
Events ListenersDOMAIN EVENTS
MemberRepliedToThread NotifyThreadSubscribers
SendNotificationEmail
NotifyTaggedMembers
EVENTS LISTENERS
MemberNotificationSent
Laravel.IO, A Use Case Architecture By Shawn McCool Laracon 2014 in NYC
Some Disadvantages
- Can be harder to understand what’s happening
- Requires more infrastructure
- Events can be hard to debug
Laravel.IO, A Use Case Architecture By Shawn McCool Laracon 2014 in NYC
DOMAIN-DRIVEN DESIGN
Laravel.IO, A Use Case Architecture By Shawn McCool Laracon 2014 in NYC
MORE INFORMATION ABOUT DDD
http://verraes.net
http://rosstuck.com
http://dddinphp.org
Domain-Driven Designby Eric Evans
Implementing Domain-Driven Designby Vaughn Vernon
Laravel.IO, A Use Case Architecture By Shawn McCool Laracon 2014 in NYC
Even More Information
A very quick read + it’s free
http://www.infoq.com/minibooks/domain-driven-design-quickly
Martin Fowler
http://martinfowler.com/bliki/CommandOrientedInterface.html
http://martinfowler.com/eaaDev/DomainEvent.html
Laravel.IO, A Use Case Architecture By Shawn McCool Laracon 2014 in NYC
Thank you Laracon 2014!
Hopefully, I talked so ridiculously fast
that there’s time for questions.
Twitter @ShawnMcCool
Special Thanks to Nick Spelt and Mitchell van Wijngaarden