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# Integration Reference
Patterns for building integrations in OroCommerce.
## Oro IntegrationBundle Pattern
For managed integrations visible in System > Integrations:
1. **Transport** -- implements `TransportInterface`, handles connectivity
2. **Connector** -- implements `ConnectorInterface`, defines sync logic per entity
3. **Channel Type** -- defines the integration type shown in UI
### Transport
```php
class MyTransport implements TransportInterface
{
public function init(Transport $transportEntity): void { }
public function getLabel(): string { return 'My Integration'; }
public function getSettingsFormType(): string { return MyTransportSettingsType::class; }
public function getSettingsEntityFQCN(): string { return MyTransportSettings::class; }
}
```
Tag: `{ name: oro_integration.transport, type: my_integration, channel_type: my_channel }`
### Connector
```php
class MyConnector implements ConnectorInterface
{
public function getLabel(): string { return 'My Connector'; }
public function getType(): string { return 'my_entity'; }
public function getImportEntityFQCN(): string { return MyEntity::class; }
public function getImportJobName(): string { return 'my_import_job'; }
}
```
Tag: `{ name: oro_integration.connector, type: my_entity, channel_type: my_channel }`
## API-Based Integration (Middleware)
For external API integrations not using the IntegrationBundle:
1. Create an HTTP client service wrapping Symfony HttpClient
2. Store credentials in system configuration (see system-config pattern)
3. Use MQ processors for async data sync
4. Implement retry/backoff for resilience
5. Use notification alerts for failure reporting
## Import/Export Services
```yaml
services:
acme.importexport.data_converter:
parent: oro_importexport.data_converter.configurable
acme.importexport.processor.export:
parent: oro_importexport.processor.export_abstract
calls:
- [setDataConverter, ['@acme.importexport.data_converter']]
tags:
- { name: oro_importexport.processor, type: export,
entity: 'Acme\Bundle\ExampleBundle\Entity\Example',
alias: acme_example }
acme.importexport.processor.import:
parent: oro_importexport.processor.import_abstract
calls:
- [setDataConverter, ['@acme.importexport.data_converter']]
tags:
- { name: oro_importexport.processor, type: import,
entity: 'Acme\Bundle\ExampleBundle\Entity\Example',
alias: acme_example }
```
## Notification Alerts
Use `Oro\Bundle\NotificationAlertBundle` to surface integration failures:
```php
$this->notificationAlertManager->addNotificationAlert(
NotificationAlert::createForIntegration($integration, 'Sync failed: ...')
);
```