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