medusa-store/www/apps/docs/content/references/services/classes/services.NotificationService.mdx

---
displayed_sidebar: servicesSidebar
---

import ParameterTypes from "@site/src/components/ParameterTypes"

# NotificationService

## constructor

### Parameters

<ParameterTypes parameters={[{"name":"container","type":"`InjectedDependencies`","description":"","optional":false,"defaultValue":"","expandable":false,"children":[]}]}  sectionTitle="new NotificationService"/>

___

## Properties

<ParameterTypes parameters={[{"name":"manager_","type":"`EntityManager`","description":"","optional":false,"defaultValue":"","expandable":false,"children":[]},{"name":"transactionManager_","type":"`undefined` \\| `EntityManager`","description":"","optional":false,"defaultValue":"","expandable":false,"children":[]},{"name":"__container__","type":"`any`","description":"","optional":false,"defaultValue":"","expandable":false,"children":[]},{"name":"subscribers_","type":"`object`","description":"","optional":false,"defaultValue":"{}","expandable":false,"children":[]},{"name":"attachmentGenerator_","type":"`unknown`","description":"","optional":false,"defaultValue":"null","expandable":false,"children":[]},{"name":"container_","type":"`InjectedDependencies` & `object`","description":"","optional":false,"defaultValue":"","expandable":false,"children":[]},{"name":"logger_","type":"[Logger](../../medusa/types/medusa.Logger.mdx)","description":"","optional":false,"defaultValue":"","expandable":false,"children":[]},{"name":"notificationRepository_","type":"Repository&#60;[Notification](../../entities/classes/entities.Notification.mdx)&#62;","description":"","optional":false,"defaultValue":"","expandable":false,"children":[]},{"name":"notificationProviderRepository_","type":"Repository&#60;[NotificationProvider](../../entities/classes/entities.NotificationProvider.mdx)&#62;","description":"","optional":false,"defaultValue":"","expandable":false,"children":[]},{"name":"__configModule__","type":"`Record<string, unknown>`","description":"","optional":true,"defaultValue":"","expandable":false,"children":[]},{"name":"__moduleDeclaration__","type":"`Record<string, unknown>`","description":"","optional":true,"defaultValue":"","expandable":false,"children":[]}]}  sectionTitle="NotificationService"/>

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## Accessors

### activeManager\_

#### Returns

<ParameterTypes parameters={[{"name":"EntityManager","type":"`EntityManager`","optional":false,"defaultValue":"","description":"","expandable":false,"children":[]}]}  sectionTitle="activeManager_"/>

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## Methods

### withTransaction

#### Parameters

<ParameterTypes parameters={[{"name":"transactionManager","type":"`EntityManager`","description":"","optional":true,"defaultValue":"","expandable":false,"children":[]}]}  sectionTitle="withTransaction"/>

#### Returns

<ParameterTypes parameters={[{"name":"this","type":"`this`","optional":false,"defaultValue":"","description":"","expandable":false,"children":[]}]}  sectionTitle="withTransaction"/>

### shouldRetryTransaction\_

#### Parameters

<ParameterTypes parameters={[{"name":"err","type":"`Record<string, unknown>` \\| `object`","description":"","optional":false,"defaultValue":"","expandable":false,"children":[]}]}  sectionTitle="shouldRetryTransaction_"/>

#### Returns

<ParameterTypes parameters={[{"name":"boolean","type":"`boolean`","optional":false,"defaultValue":"","description":"","expandable":false,"children":[]}]}  sectionTitle="shouldRetryTransaction_"/>

### atomicPhase\_

Wraps some work within a transactional block. If the service already has
a transaction manager attached this will be reused, otherwise a new
transaction manager is created.

#### Type Parameters

<ParameterTypes parameters={[{"name":"TResult","type":"`object`","description":"","optional":false,"defaultValue":"","expandable":false,"children":[]},{"name":"TError","type":"`object`","description":"","optional":false,"defaultValue":"","expandable":false,"children":[]}]}  sectionTitle="atomicPhase_"/>

#### Parameters

<ParameterTypes parameters={[{"name":"work","type":"(`transactionManager`: `EntityManager`) => Promise&#60;TResult&#62;","description":"the transactional work to be done","optional":false,"defaultValue":"","expandable":false,"children":[]},{"name":"isolationOrErrorHandler","type":"`IsolationLevel` \\| (`error`: TError) => Promise&#60;void \\| TResult&#62;","description":"the isolation level to be used for the work.","optional":true,"defaultValue":"","expandable":false,"children":[]},{"name":"maybeErrorHandlerOrDontFail","type":"(`error`: TError) => Promise&#60;void \\| TResult&#62;","description":"Potential error handler","optional":true,"defaultValue":"","expandable":false,"children":[]}]}  sectionTitle="atomicPhase_"/>

#### Returns

<ParameterTypes parameters={[{"name":"Promise","type":"Promise&#60;TResult&#62;","optional":false,"defaultValue":"","description":"the result of the transactional work","expandable":false,"children":[]}]}  sectionTitle="atomicPhase_"/>

### registerAttachmentGenerator

Registers an attachment generator to the service. The generator can be
used to generate on demand invoices or other documents.

#### Parameters

<ParameterTypes parameters={[{"name":"service","type":"`unknown`","description":"the service to assign to the attachmentGenerator","optional":false,"defaultValue":"","expandable":false,"children":[]}]}  sectionTitle="registerAttachmentGenerator"/>

#### Returns

<ParameterTypes parameters={[{"name":"void","type":"`void`","optional":false,"defaultValue":"","description":"Registers an attachment generator to the service. The generator can be\nused to generate on demand invoices or other documents.","expandable":false,"children":[]}]}  sectionTitle="registerAttachmentGenerator"/>

### registerInstalledProviders

Takes a list of notification provider ids and persists them in the database.

#### Parameters

<ParameterTypes parameters={[{"name":"providerIds","type":"`string`[]","description":"a list of provider ids","optional":false,"defaultValue":"","expandable":false,"children":[]}]}  sectionTitle="registerInstalledProviders"/>

#### Returns

<ParameterTypes parameters={[{"name":"Promise","type":"Promise&#60;void&#62;","optional":false,"defaultValue":"","description":"Takes a list of notification provider ids and persists them in the database.","expandable":false,"children":[]}]}  sectionTitle="registerInstalledProviders"/>

### list

Retrieves a list of notifications.

#### Parameters

<ParameterTypes parameters={[{"name":"selector","type":"[Selector](../../medusa/types/medusa.Selector.mdx)&#60;[Notification](../../entities/classes/entities.Notification.mdx)&#62;","description":"the params to select the notifications by.","optional":false,"defaultValue":"","expandable":false,"children":[]},{"name":"config","type":"[FindConfig](../../medusa/interfaces/medusa.FindConfig.mdx)&#60;[Notification](../../entities/classes/entities.Notification.mdx)&#62;","description":"the configuration to apply to the query","optional":false,"defaultValue":"","expandable":false,"children":[]}]}  sectionTitle="list"/>

#### Returns

<ParameterTypes parameters={[{"name":"Promise","type":"Promise&#60;[Notification](../../entities/classes/entities.Notification.mdx)[]&#62;","optional":false,"defaultValue":"","description":"the notifications that satisfy the query.","expandable":false,"children":[]}]}  sectionTitle="list"/>

### listAndCount

Retrieves a list of notifications and total count.

#### Parameters

<ParameterTypes parameters={[{"name":"selector","type":"[Selector](../../medusa/types/medusa.Selector.mdx)&#60;[Notification](../../entities/classes/entities.Notification.mdx)&#62;","description":"the params to select the notifications by.","optional":false,"defaultValue":"","expandable":false,"children":[]},{"name":"config","type":"[FindConfig](../../medusa/interfaces/medusa.FindConfig.mdx)&#60;[Notification](../../entities/classes/entities.Notification.mdx)&#62;","description":"the configuration to apply to the query","optional":false,"defaultValue":"","expandable":false,"children":[]}]}  sectionTitle="listAndCount"/>

#### Returns

<ParameterTypes parameters={[{"name":"Promise","type":"Promise&#60;[[Notification](../../entities/classes/entities.Notification.mdx)[], number]&#62;","optional":false,"defaultValue":"","description":"the notifications that satisfy the query as well as the count.","expandable":false,"children":[]}]}  sectionTitle="listAndCount"/>

### retrieve

Retrieves a notification with a given id

#### Parameters

<ParameterTypes parameters={[{"name":"id","type":"`string`","description":"the id of the notification","optional":false,"defaultValue":"","expandable":false,"children":[]},{"name":"config","type":"[FindConfig](../../medusa/interfaces/medusa.FindConfig.mdx)&#60;[Notification](../../entities/classes/entities.Notification.mdx)&#62;","description":"the configuration to apply to the query","optional":false,"defaultValue":"{}","expandable":false,"children":[]}]}  sectionTitle="retrieve"/>

#### Returns

<ParameterTypes parameters={[{"name":"Promise","type":"Promise&#60;[Notification](../../entities/classes/entities.Notification.mdx)&#62;","optional":false,"defaultValue":"","description":"the notification","expandable":false,"children":[]}]}  sectionTitle="retrieve"/>

### subscribe

Subscribes a given provider to an event.

#### Parameters

<ParameterTypes parameters={[{"name":"eventName","type":"`string`","description":"the event to subscribe to","optional":false,"defaultValue":"","expandable":false,"children":[]},{"name":"providerId","type":"`string`","description":"the provider that the event will be sent to","optional":false,"defaultValue":"","expandable":false,"children":[]}]}  sectionTitle="subscribe"/>

#### Returns

<ParameterTypes parameters={[{"name":"void","type":"`void`","optional":false,"defaultValue":"","description":"Subscribes a given provider to an event.","expandable":false,"children":[]}]}  sectionTitle="subscribe"/>

### retrieveProvider\_

Finds a provider with a given id. Will throw a NOT\_FOUND error if the
resolution fails.

#### Parameters

<ParameterTypes parameters={[{"name":"id","type":"`string`","description":"the id of the provider","optional":false,"defaultValue":"","expandable":false,"children":[]}]}  sectionTitle="retrieveProvider_"/>

#### Returns

<ParameterTypes parameters={[{"name":"AbstractNotificationService","type":"`object`","description":"## Overview\n\n:::note[Prerequisites]\n\nBefore creating a Notification Provider, [install an event bus module](https://docs.medusajs.com/development/events/modules/redis).\n\n:::\n\nA Notification Provider is a provider that handles sending and resending of notifications.\n\nTo create a Notification Provider, create a TypeScript or JavaScript file in `src/services`. The name of the file is the name of the provider\n(for example, `sendgrid.ts`). The file must export a class that extends the `AbstractNotificationService` class imported from `@medusajs/medusa`.\n\nFor example, create the file `src/services/email-sender.ts` with the following content:\n\n```ts title=\"src/services/email-sender.ts\"\nimport { AbstractNotificationService } from \"@medusajs/medusa\"\nimport { EntityManager } from \"typeorm\"\n\nclass EmailSenderService extends AbstractNotificationService {\n  protected manager_: EntityManager\n  protected transactionManager_: EntityManager\n\n  sendNotification(\n    event: string,\n    data: unknown,\n    attachmentGenerator: unknown\n  ): Promise<{\n      to: string;\n      status: string;\n      data: Record<string, unknown>;\n    }> {\n    throw new Error(\"Method not implemented.\")\n  }\n  resendNotification(\n    notification: unknown,\n    config: unknown,\n    attachmentGenerator: unknown\n  ): Promise<{\n      to: string;\n      status: string;\n      data: Record<string, unknown>;\n    }> {\n    throw new Error(\"Method not implemented.\")\n  }\n\n}\n\nexport default EmailSenderService\n```\n\n---\n\n## Identifier Property\n\nThe `NotificationProvider` entity has 2 properties: `identifier` and `is_installed`. The value of the `identifier` property in the notification provider\nclass is used when the Notification Provider is created in the database.\n\nThe value of this property is also used later when you want to subscribe the Notification Provider to events in a [Loader](https://docs.medusajs.com/development/loaders/overview).\n\nFor example:\n\n```ts\nclass EmailSenderService extends AbstractNotificationService {\n  static identifier = \"email-sender\"\n  // ...\n}\n```\n\n---","optional":false,"defaultValue":"","expandable":false,"children":[]}]}  sectionTitle="retrieveProvider_"/>

### handleEvent

Handles an event by relaying the event data to the subscribing providers.
The result of the notification send will be persisted in the database in
order to allow for resends. Will log any errors that are encountered.

#### Parameters

<ParameterTypes parameters={[{"name":"eventName","type":"`string`","description":"the event to handle","optional":false,"defaultValue":"","expandable":false,"children":[]},{"name":"data","type":"`Record<string, unknown>`","description":"the data the event was sent with","optional":false,"defaultValue":"","expandable":false,"children":[]}]}  sectionTitle="handleEvent"/>

#### Returns

<ParameterTypes parameters={[{"name":"Promise","type":"Promise&#60;undefined \\| void \\| [Notification](../../entities/classes/entities.Notification.mdx)[]&#62;","optional":false,"defaultValue":"","description":"the result of notification subscribed","expandable":false,"children":[]}]}  sectionTitle="handleEvent"/>

### send

Sends a notification, by calling the given provider's sendNotification
method. Persists the Notification in the database.

#### Parameters

<ParameterTypes parameters={[{"name":"event","type":"`string`","description":"the name of the event","optional":false,"defaultValue":"","expandable":false,"children":[]},{"name":"eventData","type":"`Record<string, unknown>`","description":"the data the event was sent with","optional":false,"defaultValue":"","expandable":false,"children":[]},{"name":"providerId","type":"`string`","description":"the provider that should handle the event.","optional":false,"defaultValue":"","expandable":false,"children":[]}]}  sectionTitle="send"/>

#### Returns

<ParameterTypes parameters={[{"name":"Promise","type":"Promise&#60;undefined \\| [Notification](../../entities/classes/entities.Notification.mdx)&#62;","optional":false,"defaultValue":"","description":"the created notification","expandable":false,"children":[]}]}  sectionTitle="send"/>

### resend

Resends a notification by retrieving a prior notification and calling the
underlying provider's resendNotification method.

#### Parameters

<ParameterTypes parameters={[{"name":"id","type":"`string`","description":"the id of the notification","optional":false,"defaultValue":"","expandable":false,"children":[]},{"name":"config","type":"[FindConfig](../../medusa/interfaces/medusa.FindConfig.mdx)&#60;[Notification](../../entities/classes/entities.Notification.mdx)&#62;","description":"any configuration that might override the previous\n send","optional":false,"defaultValue":"{}","expandable":false,"children":[]}]}  sectionTitle="resend"/>

#### Returns

<ParameterTypes parameters={[{"name":"Promise","type":"Promise&#60;[Notification](../../entities/classes/entities.Notification.mdx)&#62;","optional":false,"defaultValue":"","description":"the newly created notification","expandable":false,"children":[]}]}  sectionTitle="resend"/>