[QPID-8454] [Broker-J] Expose configured object statistics in prometheus format

• Type: New Feature
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: qpid-java-broker-8.0.1, qpid-java-broker-7.1.9
• Component/s: Broker-J
• Assignee: Unassigned
• Reporter: Alex Rudyy
• Created: 14/Jul/20 08:52
• Updated: 19/Sep/20 17:50
• Resolved: 14/Sep/20 07:59

Description

The configured object statistics currently can be retrieved using a call to method getStatistics(), configured object REST API endpoint /api/latest/<category>/<path> or query API ( /api/latest/querybroker/<category> or /api/latest/queryvhost/<virtual host node name>/<virtual host name>/<category> ). The statistics is returned back to the caller in json format. That works for majority of uses cases. However, when it is required to integrate Qpid Broker-J with Prometheus, the Qpid users are required to implement an intermediate layer where Qpid metrics needs to be converted into a Prometheus format https://prometheus.io/docs/concepts/data_model/.

In order to easy the burden of integration Qpid Broker-J with Prometheus, the support for reporting statistics metrics in Prometheus format can be added into Qpid Broker-J.

Potentially, we can add an endpoint exposing all Qpid statistics as Prometheus metrics https://prometheus.io/docs/concepts/metric_types/