🫚 Gember Event Sourcing Symfony Bundle

Gember Event Sourcing Symfony Bundle for (gember/event-sourcing).

Prerequisites

This package requires Symfony ^7.1.

Several additional packages should be installed and configured in Symfony as well:

Symfony Messenger (symfony/messenger)

At least one message bus should be configured, with the name @event.bus.

When this bus is configured, Gember Event Sourcing works out of the box. However, when a different event bus is preferred, it can be overwritten by configuration (gember_event_sourcing.yaml).

gember_event_sourcing:
    message_bus:
        symfony:
            event_bus: '@event.bus'

Note: It must be a service implementing Symfony\Component\Messenger\MessageBusInterface.

Symfony Cache (symfony/cache)

Gember Event Sourcing makes use of @cache.app. This cache service is automatically configured when using Symfony framework including symfony/cache.

When this cache service is configured, Gember Event Sourcing works out of the box. However, when a different cache pool is preferred, it can be overwritten by configuration (gember_event_sourcing.yaml):

gember_event_sourcing:
    cache:
        enabled: true
        psr6: '@cache.app'
        
        # Or set a PSR-16 compatible cache layer of your choice
        # psr16: '@some.psr16.service'

Note: It must be a service implementing Psr\Cache\CacheItemPoolInterface (PSR-6) or Psr\SimpleCache\CacheInterface (PSR-16).

Symfony Serializer (symfony/serializer)

Gember Event Sourcing makes use of @serializer. This serializer service is automatically configured when using Symfony framework including symfony/serializer.

When this serializer service is configured, Gember Event Sourcing works out of the box. However, when a different serializer is preferred, it can be overwritten by configuration (gember_event_sourcing.yaml):

gember_event_sourcing:
    serializer:
        symfony:
          serializer: '@serializer'

Note: It must be a service implementing Symfony\Component\Serializer\SerializerInterface.

Doctrine DBAL/ORM (doctrine/dbal, doctrine/orm)

Gember Event Sourcing makes use of @doctrine.dbal.default_connection. This connection service is automatically configured when using Symfony framework including doctrine/dbal or doctrine/orm.

When this connection service is configured, Gember Event Sourcing works out of the box. However, when a different Doctrine connection is preferred, it can be overwritten by configuration (gember_event_sourcing.yaml):

gember_event_sourcing:
  event_store:
    rdbms:
      doctrine_dbal:
        connection: '@doctrine.dbal.default_connection'

Note: It must be a service implementing Doctrine\DBAL\Connection.

Symfony UID (symfony/uid)

Gember Event Sourcing makes use of @Symfony\Component\Uid\Factory\UuidFactory or Symfony\Component\Uid\Factory\UlidFactory.

These factories are automatically configured when using Symfony framework including symfony/uid.

By default, the UUID factory is used in Gember Event Sourcing. However, if the ULID factory is preferred, it can be overwritten by configuration (gember_event_sourcing.yaml):

gember_event_sourcing:
  generator:
    identity:
      # Use Gember alias of @Symfony\Component\Uid\Factory\UuidFactory:
      service: '@gember.identity_generator_symfony.uuid.symfony_uuid_identity_generator'

      # Or use Gember alias of @Symfony\Component\Uid\Factory\UlidFactory:
      # service: '@gember.identity_generator_symfony.ulid.symfony_ulid_identity_generator'

Installation

When all prerequisites are met, it's time to install the bundle package itself:

composer require gember/event-sourcing-symfony-bundle 

Database

In order to persist all domain events in database, a running SQL database is needed. The event store requires two tables. Schema is available in either raw SQL or in a migration file format:

Raw SQL schema: https://github.com/GemberPHP/rdbms-event-store-doctrine-dbal/blob/main/resources/schema.sql

Migrations:

• Doctrine migrations: https://github.com/GemberPHP/rdbms-event-store-doctrine-dbal/blob/main/resources/migrations/doctrine
• Phinx migrations: https://github.com/GemberPHP/rdbms-event-store-doctrine-dbal/tree/main/resources/migrations/phinx

Good to go!

Check the main package gember/event-sourcing or the demo application gember/example-event-sourcing-dcb for examples.