Moved to google.golang.org/genproto/googleapis/api/annotations

Fixes #52

vendor/github.com/go-kit/kit/metrics/provider/provider.go

@@ -0,0 +1,42 @@
+// Package provider provides a factory-like abstraction for metrics backends.
+// This package is provided specifically for the needs of the NY Times framework
+// Gizmo. Most normal Go kit users shouldn't need to use it.
+//
+// Normally, if your microservice needs to support different metrics backends,
+// you can simply do different construction based on a flag. For example,
+//
+//    var latency metrics.Histogram
+//    var requests metrics.Counter
+//    switch *metricsBackend {
+//    case "prometheus":
+//        latency = prometheus.NewSummaryVec(...)
+//        requests = prometheus.NewCounterVec(...)
+//    case "statsd":
+//        s := statsd.New(...)
+//        t := time.NewTicker(5*time.Second)
+//        go s.SendLoop(t.C, "tcp", "statsd.local:8125")
+//        latency = s.NewHistogram(...)
+//        requests = s.NewCounter(...)
+//    default:
+//        log.Fatal("unsupported metrics backend %q", *metricsBackend)
+//    }
+//
+package provider
+
+import (
+	"github.com/go-kit/kit/metrics"
+)
+
+// Provider abstracts over constructors and lifecycle management functions for
+// each supported metrics backend. It should only be used by those who need to
+// swap out implementations dynamically.
+//
+// This is primarily useful for intermediating frameworks, and is likely
+// unnecessary for most Go kit services. See the package-level doc comment for
+// more typical usage instructions.
+type Provider interface {
+	NewCounter(name string) metrics.Counter
+	NewGauge(name string) metrics.Gauge
+	NewHistogram(name string, buckets int) metrics.Histogram
+	Stop()
+}