0.3.0

• Add MicroMeter Metrics Reporter (@jpkrohling #27)

This release includes a new MetricsReporter based on the Micrometer project. This enables support for multiple backend metrics systems, including statsd, jmx as well as Prometheus. This means that the direct PrometheusMetricsReporter has been deprecated in favour of support for Prometheus via Micrometer.

One change that occurs as a result of this change is the name of the metric being reported to Prometheus. In the previous release, the metric name was span (e.g. span_count, span_sum). When reporting metrics to Prometheus via Micrometer, the metric name is now span_seconds (e.g. span_seconds_count, etc).