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package command
import (
"context"
"sync"
"github.com/sirupsen/logrus"
)
type requestStatsKey struct{}
// Stats records statistics about a command that was spawned.
type Stats struct {
resource map[string]int
metadata map[string]string
sync.Mutex
}
// RecordSum sums up all the values for a given key.
func (stats *Stats) RecordSum(key string, value int) {
stats.Lock()
defer stats.Unlock()
if prevValue, ok := stats.resource[key]; ok {
value += prevValue
}
stats.resource[key] = value
}
// RecordMax will store the max value for a given key.
func (stats *Stats) RecordMax(key string, value int) {
stats.Lock()
defer stats.Unlock()
if prevValue, ok := stats.resource[key]; ok {
if prevValue > value {
return
}
}
stats.resource[key] = value
}
// RecordMetadata records metadata for the given key.
func (stats *Stats) RecordMetadata(key string, value string) {
stats.Lock()
defer stats.Unlock()
stats.metadata[key] = value
}
// Fields returns all the stats as logrus.Fields
func (stats *Stats) Fields() logrus.Fields {
stats.Lock()
defer stats.Unlock()
f := logrus.Fields{}
for k, v := range stats.resource {
f[k] = v
}
for k, v := range stats.metadata {
f[k] = v
}
return f
}
// StatsFromContext gets the `Stats` from the given context.
func StatsFromContext(ctx context.Context) *Stats {
stats, _ := ctx.Value(requestStatsKey{}).(*Stats)
return stats
}
// InitContextStats returns a new context with `Stats` added to the given context.
func InitContextStats(ctx context.Context) context.Context {
return context.WithValue(ctx, requestStatsKey{}, &Stats{
resource: make(map[string]int),
metadata: make(map[string]string),
})
}
|
