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https://github.com/geekcell/ddd-symfony-bundle
A bundle for pragmatic domain driven design in Symfony.
https://github.com/geekcell/ddd-symfony-bundle
ddd ddd-patterns domain-driven-design php symfony symfony-bundle
Last synced: about 2 months ago
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A bundle for pragmatic domain driven design in Symfony.
- Host: GitHub
- URL: https://github.com/geekcell/ddd-symfony-bundle
- Owner: geekcell
- License: mit
- Created: 2023-01-05T11:44:16.000Z (almost 2 years ago)
- Default Branch: main
- Last Pushed: 2023-12-20T14:06:12.000Z (about 1 year ago)
- Last Synced: 2024-04-22T00:33:53.591Z (8 months ago)
- Topics: ddd, ddd-patterns, domain-driven-design, php, symfony, symfony-bundle
- Language: PHP
- Homepage: https://www.geekcell.io
- Size: 217 KB
- Stars: 6
- Watchers: 6
- Forks: 1
- Open Issues: 5
-
Metadata Files:
- Readme: README.md
- Changelog: CHANGELOG.md
- License: LICENSE
- Codeowners: CODEOWNERS
Awesome Lists containing this project
README
# Symfony Bundle for DDD
This Symfony bundle augments [geekcell/php-ddd](https://github.com/geekcell/php-ddd) with framework-specific implementations to enable seamless [domain driven design](https://martinfowler.com/tags/domain%20driven%20design.html) in a familiar environment.
---
- [Installation](#installation)
- [Generator Commands](#generator-commands)
- [Building Blocks](#building-blocks)
- [Model & Repository](#model--repository)
- [AggregateRoot & Domain Events](#aggregateroot--domain-events)
- [Command & Query](#command--query)
- [Controller](#controller)
- [Resource](#resource)
## Installation
To use this bundle, require it in Composer
```bash
composer require geekcell/ddd-bundle
```
## Generator Commands
This bundle adds several [MakerBundle](https://symfony.com/bundles/SymfonyMakerBundle/current/index.html) commands to generate commonly used components.
In order to use them in your Symfony project, you need to require it with composer first
```bash
composer require symfony/maker-bundle
```
### Available Commands
```bash
make:ddd:command Creates a new command class and handler
make:ddd:controller Creates a new controller class
make:ddd:model Creates a new domain model class
make:ddd:query Creates a new query class and handler
make:ddd:resource Creates a new API Platform resource
```
## Building Blocks
### Model & Repository
The **domain model** is a representation of the domain concepts and business logic within your project. The **repository** on the other hand is an abstraction layer that provides a way to access and manipulate domain objects without exposing the details of the underlying data persistence mechanism (such as a database or file system).
Since Doctrine is the de-facto persistence layer for Symfony, this bundle also provides an (opinionated) implementation for a Doctrine-based repository.
#### Generator Command(s)
This command can be used to generate:
- The domain model class.
- A repository class for the model.
- The model's identity class as value object (optional).
- A Doctrine database entity configuration, either as annotation or separate config file (optional).
- A custom Doctrine type for the model's identity class (optional).
```bash
Description:
Creates a new domain model class
Usage:
make:ddd:model [options] [--] []
Arguments:
name The name of the model class (e.g. Customer)
Options:
--aggregate-root Marks the model as aggregate root
--entity=ENTITY Use this model as Doctrine entity
--with-identity=WITH-IDENTITY Whether an identity value object should be created
--with-suffix Adds the suffix "Model" to the model class name
```
### AggregateRoot & Domain Events
Optionally, by inheriting from `AggregateRoot`, you can make a model class an **aggregate root**, which is used to encapsulate a group of related objects, along with the behavior and rules that apply to them. The aggregate root is usually responsible for managing the lifecycle of the objects within the aggregate, and for coordinating any interactions between them.
The `AggregateRoot` base class comes with some useful functionality to record and dispatch **domain events**, which represent significant occurrences or state changes within the domain of a software system.
#### Generator Command(s)
N/A
#### Example Usage
```php
// src/Domain/Event/OrderPlacedEvent.php
use GeekCell\Ddd\Contracts\Domain\Event as DomainEvent;
readonly class OrderPlacedEvent implements DomainEvent
{
public function __construct(
public Order $order,
) {
}
}
// src/Domain/Model/Order.php
use GeekCell\DddBundle\Domain\AggregateRoot;
class Order extends AggregateRoot
{
public function save(): void
{
$this->record(new OrderPlacedEvent($this));
}
// ...
}
// Actual usage ...
$order = new Order( /* ... */ );
$order->save();
$order->commit(); // All recorded events will be dispatched and released
```
_Hint: If you want to dispatch an event directly, use `AggregateRoot::dispatch()` instead of `AggregateRoot::record()`._
If you cannot (or don't want to) extend from `AggregateRoot`, you can alternative use `DispatchableTrait` to add dispatching capabilities to any class. The former is however the recommended way.
### Command & Query
You can use `CommandBus` and `QueryBus` as services to implement [CQRS](https://martinfowler.com/bliki/CQRS.html). Internally, both buses will use the [Symfony messenger](https://symfony.com/doc/current/messenger.html) to dispatch commands and queries.
#### Generator Command(s)
These commands can be used to generate:
- A command and command handler class.
- A query and query handler class.
The query / command generated is just an empty class. The handler class is registered as a message handler for the configured [Symfony Messenger](https://symfony.com/doc/current/messenger.html).
```bash
Description:
Creates a new query|command class and handler
Usage:
make:ddd:query|command []
Arguments:
name The name of the query|command class (e.g. Customer)
```
#### Example Usage
```php
// src/Application/Query/TopRatedBookQuery.php
use GeekCell\Ddd\Contracts\Application\Query;
readonly class TopRatedBooksQuery implements Query
{
public function __construct(
public string $category,
public int $sinceDays,
public int $limit = 10,
) {
}
// Getters etc.
}
// src/Application/Query/TopRatedBookQueryHandler.php
use GeekCell\Ddd\Contracts\Application\QueryHandler;
#[AsMessageHandler]
class TopRatedBookQueryHandler implements QueryHandler
{
public function __construct(
private readonly BookRepository $repository,
) {
}
public function __invoke(TopRatedBookQuery $query)
{
$books = $this->repository
->findTopRated($query->category, $query->sinceDays)
->paginate($query->limit);
return $books;
}
}
// src/Infrastructure/Http/Controller/BookController.php
use GeekCell\Ddd\Contracts\Application\QueryBus;
class BookController extends AbstractController
{
public function __construct(
private readonly QueryBus $queryBus,
) {
}
#[Route('/books/top-rated')]
public function getTopRated(Request $request)
{
$query = new TopRatedBooksQuery( /* extract from request */ );
$topRatedBooks = $this->queryBus->dispatch($query);
// ...
}
}
```
### Controller
A standard Symfony controller, but augmented with command and query bus(es).
#### Generator Command
This command can be used to generate a controller with optional `QueryBus` and `CommandBus` dependencies.
```bash
Description:
Creates a new controller class
Usage:
make:ddd:controller [options] [--] []
Arguments:
name The name of the model class (e.g. Customer)
Options:
--include-query-bus Add a query bus dependency
--include-command-bus Add a command bus dependency
```
### Resource
An [API Platform](https://api-platform.com/) resource, but instead of using the standard approach of using a combined entity/resource approach, it is preferred to separate model (domain layer) and API Platform specific resource (infrastructure layer)
#### Generator Command
Minimum required API Platform version is [2.7](https://api-platform.com/docs/core/upgrade-guide/#api-platform-2730) for the [new metadata system](https://api-platform.com/docs/core/upgrade-guide/#apiresource-metadata).
```bash
Description:
Creates a new API Platform resource
Usage:
make:ddd:resource [options] [--] []
Arguments:
name The name of the model class to create the resource for (e.g. Customer). Model must exist already.
Options:
--config Config flavor to create (attribute|xml).
```