40 lines
1,009 B
Go
40 lines
1,009 B
Go
// Package ratemap implements a goroutine-safe map of string to float64. It can
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// be embedded in implementations whose metrics support fixed sample rates, so
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// that an additional parameter doesn't have to be tracked through the e.g.
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// lv.Space object.
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package ratemap
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import "sync"
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// RateMap is a simple goroutine-safe map of string to float64.
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type RateMap struct {
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mtx sync.RWMutex
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m map[string]float64
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}
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// New returns a new RateMap.
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func New() *RateMap {
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return &RateMap{
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m: map[string]float64{},
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}
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}
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// Set writes the given name/rate pair to the map.
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// Set is safe for concurrent access by multiple goroutines.
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func (m *RateMap) Set(name string, rate float64) {
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m.mtx.Lock()
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defer m.mtx.Unlock()
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m.m[name] = rate
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}
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// Get retrieves the rate for the given name, or 1.0 if none is set.
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// Get is safe for concurrent access by multiple goroutines.
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func (m *RateMap) Get(name string) float64 {
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m.mtx.RLock()
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defer m.mtx.RUnlock()
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f, ok := m.m[name]
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if !ok {
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f = 1.0
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}
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return f
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}
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