Igniters, Nikolay, I was adding a new metric in the scope of the ticket [1] and was surprised by a few things: * DataRegionMetric public interface is deprecated, however, the suggested replacement class GridMetricsManager is internal and cannot be acquired by a user. This makes impossible for the user to fix their code to not use deprecated API * In ReadOnlyMetricsRegistry there is a Consumer<MetricRegistry>, but MetricRegistry is again an internal class. This will cause the user code compilation to break when MetricRegistry is changed
These things violate the public-private API separation and need to be fixed prior 2.8 is released. Let's discuss what changes need to be made to the API or perhaps move incomplete IEP-35 interfaces to the private package and remove deprecations until the API is ready. --AG
