ginuerzh
bc3d12ec2c
- Fix promMetrics.Gauge/Counter/Observer mutating caller's labels map by using maps.Copy instead of direct assignment - Fix Gauge/Counter/Observer returning nil for unknown metric names (now return noop implementations) - Fix metricService.Close() race with sync.Once for safe concurrent calls - Fix SetDSCP returning nil instead of errUnsupport on unsupported ops - Add nil guards to WrapConn, WrapPacketConn, WrapUDPConn, WrapListener - Add doc comments to all exported symbols - Add 45 unit tests (metrics, noop, prom, service, wrapper)
48 lines
1.0 KiB
Go
48 lines
1.0 KiB
Go
package metrics
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import "github.com/go-gost/core/metrics"
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var (
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nopGauge = &noopGauge{}
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nopCounter = &noopCounter{}
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nopObserver = &noopObserver{}
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noop metrics.Metrics = &noopMetrics{}
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)
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type noopMetrics struct{}
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// Noop returns a Metrics implementation whose counters, gauges, and observers
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// are all no-ops.
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func Noop() metrics.Metrics {
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return noop
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}
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func (m *noopMetrics) Counter(name metrics.MetricName, labels metrics.Labels) metrics.Counter {
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return nopCounter
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}
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func (m *noopMetrics) Gauge(name metrics.MetricName, labels metrics.Labels) metrics.Gauge {
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return nopGauge
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}
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func (m *noopMetrics) Observer(name metrics.MetricName, labels metrics.Labels) metrics.Observer {
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return nopObserver
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}
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type noopGauge struct{}
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func (*noopGauge) Inc() {}
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func (*noopGauge) Dec() {}
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func (*noopGauge) Add(v float64) {}
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func (*noopGauge) Set(v float64) {}
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type noopCounter struct{}
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func (*noopCounter) Inc() {}
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func (*noopCounter) Add(v float64) {}
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type noopObserver struct{}
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func (*noopObserver) Observe(v float64) {}
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