David Handermann created NIFI-9807:
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Summary: Add Renewal Window Property to OAuth2 Token Provider
Key: NIFI-9807
URL: https://issues.apache.org/jira/browse/NIFI-9807
Project: Apache NiFi
Issue Type: Improvement
Components: Extensions
Reporter: David Handermann
Assignee: David Handermann
Fix For: 1.16.0
The {{StandardOauth2AccessTokenProvider}} Controller Service supports internal
token expiration checking based on the {{expiresIn}} property of the current
{{AccessToken}}. The introduction of the provider service included a hard-coded
number, subtracted from the {{expiresIn}} property, in order to prompt token
renewal prior to the exact time of expiration.
In order to support both short-lived and long-lived token expiration scenarios,
a new Controller Service property should be added to
{{StandardOauth2AccessTokenProvider}}. The property should provide a
configurable duration within which the service will attempt to refresh the
token.
Prior to the introduction of the {{StandardOauth2AccessTokenProvider}}, the
{{AccessToken}} class implemented the {{isExpired}} check based on the exact
time of expiration. With this class being part of the OAuth2 Service API, that
behavior should be restored and the new renewal window property should be
implemented in the Controller Service itself.
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