[FEATURE REQ] Restore TransportMetrics in ServiceBusClient

[denisbredikhin]

Library name

Azure.Messaging.ServiceBus

Please describe the feature.

Description

TransportMetrics was introduced in PR #27663 as a convenient way to access transport-level metrics for ServiceBusClient.
However, it was later removed in PR #33368 with the comment referencing "metrics work @lmolkova is driving for messaging", but no concrete links or documentation were provided.

I investigated and found some related discussions and PRs:

• PR Metrics API prototype #29781
• Issue #4389

From what I can see, this work was never completed or integrated, leaving developers without an easy way to access transport-level metrics.

Why is this important?

TransportMetrics provided:

• Visibility into transport-level performance and health.
• A lightweight way to monitor and troubleshoot messaging without external instrumentation.

Removing it creates a gap for developers who need these insights for production monitoring and diagnostics.

Request

Please consider:

• Restoring TransportMetrics in ServiceBusClient, or
• Providing an alternative solution or roadmap for accessing similar metrics.

If there is an ongoing effort or design for metrics in messaging, could you share a link or documentation?

[github-actions]

Thanks for the feedback! We are routing this to the appropriate team for follow-up. cc @EldertGrootenboer @skarri-microsoft.