Support for Dynatrace metrics API v2

Dynatrace has released a new metric ingestion API much flexible than previous one. https://www.dynatrace.com/support/help/dynatrace-api/environment-api/metric-v2/post-ingest-metrics/

Ingestion flow has changed significantly:

• no need to preregister metrics
• metrics are not constrained to a custom device anymore
• more flexible naming conventions (eg. no custom: prefix)
• payload type as line protocol
• possibility to ingest gauges and counters

Since there are quite changes and new api is still in EAP, I’d propose to create a new shinny meter registry, let’s say micrometer-registry-dynatrace2 and deprecate the first versionmicrometer-registry-dynatrace so first version would be still available to be used to do not lose the history of the custom metrics registered with v1.

If is ok from your side, I’d try to contribute in this new registry in the upcoming days.

[jonatan-ivanov]

Closing this since the feature was merged: https://github.com/micrometer-metrics/micrometer/pull/2619 Thanks everyone for the contributions! 😃

[damass]

@shakuzen, would you be the one to review the PR for this issue? Please let me know if there is anything that needs to be changed or anyone else to loop in.