Callbacks

There are times where operations are not immediate, or sometimes you’d like your systems to be notified of activity in Launch. For these cases, Launch provides AuditEvents and Callbacks.

An AuditEvent is a record of a specific change to a resource in Launch, generated at the time the change is made. A Callback is a message from Launch to a specific URL of your choice (usually hosted by you).

The basic workflow is for you to subscribe to specific AuditEvents. Each time a new AuditEvent of that type is generated, a matching message will be sent to the URL specified by the Callback.

Callback URLs must be HTTPS.

Payloads are sent via POST to the URL specified in the Callback.

Callbacks may subscribe to any AuditEvent type.

The service behind the URL specified in the Callback must respond with a 200 OK or 201 Created status code. If the service does not respond with a 200 OK or 201 Created status code, the message delivery will be retried at the following intervals.

1 min
5 min
30 min
1 hr
12 hr
1 day
3 days

Note

Retry intervals are relative to the previous interval. For example, if the retry at 1 minute fails, the next attempt will be scheduled for 5 minutes after the 1 minute attempt fails (6 minutes after the message was generated).

Once all delivery attempts have been exceeded, the message is discarded.

A Callback belongs to exactly one Property. A Property can have many Callbacks. When you delete a Property, its Callbacks are also deleted. Callbacks can be created for all resources within a Property, but not for the Property itself.