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call.go
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call.go
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package instrument
import (
"sync"
"time"
)
var (
mu sync.Mutex
GraphQL CallInstrumenter
Flaps CallInstrumenter
ApiAdapter = &ApiInstrumenter{metrics: &GraphQL.metrics}
)
type CallInstrumenter struct {
metrics CallMetrics
}
type CallMetrics struct {
Calls int
Duration float64
}
type CallTimer struct {
Start time.Time
metrics *CallMetrics
}
func (i *CallInstrumenter) Begin() CallTimer {
return CallTimer{
Start: time.Now(),
metrics: &i.metrics,
}
}
func (i *CallInstrumenter) Get() CallMetrics {
mu.Lock()
defer mu.Unlock()
return i.metrics
}
func (t *CallTimer) End() {
mu.Lock()
defer mu.Unlock()
duration := time.Since(t.Start).Seconds()
t.metrics.Calls += 1
t.metrics.Duration += duration
}
// adapter for the api package's instrumentation facade
type ApiInstrumenter struct {
metrics *CallMetrics
}
func (i *ApiInstrumenter) ReportCallTiming(duration time.Duration) {
mu.Lock()
defer mu.Unlock()
i.metrics.Calls += 1
i.metrics.Duration += duration.Seconds()
}