Webhooks and events

This page explains the webhooks and associated events of the App migration platform.

Webhooks

The webhook that you register is a callback URL to which the App migration platform sends information about migration events. A sample webhook URL looks like this: https://example.com/my-migration-listener. Ensure the endpoint can accept HTTPS POST requests.

Webhook acknowledgement: Your cloud app must return a success response code (HTTP response code 200 OK) as an event acknowledgement within 5 seconds to webhook requests sent by the App migration platform. The App migration platform will send the webhook message in the form of a POST request repeatedly to your cloud app until it receives an acknowledgement.

Use the Notification API to register webhooks with the App migration platform. Registering webhooks allows the platform to notify you when specific events take place on your server app.

About the Notification API

The endpoints of the Notification API allow you to do the following:

Register webhooks
Get registered webhooks
Delete registered webhooks

The sections that follow explain all the above endpoints, and provide examples on how to use them.

Register webhooks

Use the migration/webhook endpoint to register your webhooks after your app has received the enabled lifecycle event.

We recommend that you register your cloud app to receive lifecycle events to ensure that registering your webhook with the App migration platform is successful.

The App migration platform notifies the webhook URLs specified in request payload (i.e. endpoints field) of the following API when the migrations are ready or available on the server app.

Method	Endpoint	Payload
`PUT`	`migration/webhook`	`{"endpoints" : ["https://<your-url>/<your-notification-api>"]}`

The above endpoint field must contain a non-empty JSON array with an absolute URL/s.

See an example

This section shows you an example of a request and response to register a webhook.

Sample request

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curl -X PUT "https://your-cloud-site/rest/atlassian-connect/1/migration/webhook" \
--header 'Content-Type: application/json' \
--data-raw '{"endpoints" : ["https://<your-url>/<your-notification-api>","https://<your-url>/<your-notification-api2>"]}'

Sample response
```
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200 OK
```

Get registered webhooks

Use the endpoint below to get webhooks that your cloud app has registered with the App migration platform.

Method	Endpoint
`GET`	`migration/webhook`

See an example

This section shows you an example of a request and response get registered webhooks.

Sample request

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curl -X GET "https://your-cloud-site/rest/atlassian-connect/1/migration/webhook" \
--header 'Content-Type: application/json'

Sample response

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{
    "endpoints": [
        "https://<your-url>/<your-notification-api>",
        "https://<your-url>/<your-notification-api2>"
    ]
}

Delete registered webhooks

Use the endpoint below with an empty array to delete or replace existing webhooks for a specific cloud ID.

Method	Endpoint
`PUT`	`migration/webhook`

See an example

This section shows you an example of a request and response to delete existing webhook URLs for a specific cloud ID. For example, if you want to delete all existing webhooks, you can use PUT /migration/webhook with an empty list.

Sample request

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curl -X PUT "https://your-cloud-site/rest/atlassian-connect/1/migration/webhook" \
--header 'Content-Type: application/json' \
--data-raw '{"endpoints":[]}'

Sample response
```
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200 OK
```

Events

Types of events

The App migration platform provides notifications to your cloud app using the following event types:

Event type	Description
`listener-triggered`	Notifies your cloud app when core product data migration is complete or incomplete. The App migration platform will not notify your cloud app if core product data migration fails.
`app-data-uploaded`	Notifies your cloud app that app data upload to the Atlassian secure cloud storage is complete.

The App migration platform may notify your cloud app about events in a different order to the list above. app-data-uploaded may appear before listener-triggered event notifications.

App migration platform can introduce new event types in addition to above listed event types. New event types can have different event attributes.

It's a good practice to validate the event's payload and return an error response (HTTP 4xx) if the validation fails. This will help you monitor the failed webhook events and investigate for any missing events. We will retry sending the webhook event for this scenario.

Definitions of event attributes

This section provides information you can use to interpret events.

Event attribute	Definition	Examples of application
`eventType`	Specifies the event type.	Your cloud app can respond with a request, based on the event type it receives. For example, it can make a query for mappings.
`cloudAppKey`	The app key installed app key in the cloud site.	NA
`transferId`	An ID (UUID) that the App migration platform uniquely generates per migration for each listener.	Your cloud app must include this UUID when making a request for migration-related mappings.
`messageId`	An ID (UUID) that the App migration platform generates to uniquely recognise an event.	The App migration platform may send duplicate notifications for the same event. Use this ID to detect duplication, if your app is sensitive to duplicate notifications.
`migrationId`	An ID (UUID) that the App migration platform uses to uniquely identify a migration.	NA
`migrationScopeId`	An ID that the App migration platform generates to uniquely determine a source (server) and destination (cloud-site) of migration.	NA
`name`	The name of the migration plan provided by the user who initiated the migration.	Use this as a quick way to identify a migration while troubleshooting.
`createdAt`	Timestamp of when the app migration was created.	NA
`jiraClientKey`	This is the `clientKey` of the Jira cloud instance, present in the `installed` lifecycle callback sent to your cloud application during installation.	This value is 'unknown' when the Jira product is not involved in the migration.
`confluenceClientKey`	This is the `clientKey` of the Confluence cloud instance, present in the `installed` lifecycle callback sent to your cloud application during installation.	This value is 'unknown' when the Confluence product is not involved in the migration.
`cloudUrl`	URL of the destination cloud site for the migration.	Use this URL to upload/modify data related to your app migration.
`s3Key`	An ID (UUID) to uniquely identify the data your server app uploads to cloud storage. This will only be present on `app-data-uploaded` events.	Your cloud app must use this ID to request access to ID-specific data in cloud storage.
`label`	Metadata that provides additional information about the data your server app uploads to cloud storage. This will only be present on `app-data-uploaded` events.	NA

JSON representation of event object

Confluence migration event object

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{
    "eventType": "listener-triggered",
    "cloudAppKey": "my-cloud-app-key",
    "transferId": "e4166374-2345-4c31-918c-83b14eb644f6",
    "migrationDetails": {
        "migrationId": "8e60dc59-78d6-484f-966a-a09ff8be8ed0",
        "migrationScopeId": "442bdd69-622d-323d-889d-383b41d8e536",
        "name": "Migration of my Confluence page",
        "createdAt": 1597211035,
        "jiraClientKey": "unknown",
        "confluenceClientKey": "03a7cb4b-23b6-3a79-8916-8824a053e786",
        "cloudUrl": "https://cloud-site-under-migration.atlassian.net"
    }
}

Jira migration event object

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{
    "eventType": "app-data-uploaded",
    "cloudAppKey": "my-cloud-app-key",
    "transferId": "16a84eaa-3f88-4758-94d4-ea245a3b202f",
    "migrationDetails": {
        "migrationId": "a0b8ed5a-a335-4e0d-b20f-17d821b40c2d",
        "migrationScopeId": "47d54f22-0b9d-4cda-a527-c65ef65f2564",
        "name": "Migration of my jira project",
        "createdAt": 1597193662,
        "jiraClientKey": "acb711b8-a878-356e-abbf-1ae1730308a2",
        "confluenceClientKey": "unknown",
        "cloudUrl": "https://cloud-site-under-migration.atlassian.net"
    },
    "s3Key": "636abf0f-38a2-45c1-8c68-9c7edde97f3f",
    "label": "some-optional-label"
}