90 lines
1.4 KiB
Go
90 lines
1.4 KiB
Go
package stats
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import (
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"runtime"
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"sync"
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"time"
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"github.com/micro/go-micro/v3/util/ring"
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)
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type stats struct {
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// used to store past stats
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buffer *ring.Buffer
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sync.RWMutex
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started int64
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requests uint64
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errors uint64
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}
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func (s *stats) snapshot() *Stat {
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s.RLock()
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defer s.RUnlock()
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var mstat runtime.MemStats
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runtime.ReadMemStats(&mstat)
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now := time.Now().Unix()
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return &Stat{
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Timestamp: now,
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Started: s.started,
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Uptime: now - s.started,
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Memory: mstat.Alloc,
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GC: mstat.PauseTotalNs,
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Threads: uint64(runtime.NumGoroutine()),
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Requests: s.requests,
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Errors: s.errors,
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}
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}
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func (s *stats) Read() ([]*Stat, error) {
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// TODO adjustable size and optional read values
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buf := s.buffer.Get(60)
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var stats []*Stat
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// get a value from the buffer if it exists
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for _, b := range buf {
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stat, ok := b.Value.(*Stat)
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if !ok {
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continue
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}
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stats = append(stats, stat)
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}
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// get a snapshot
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stats = append(stats, s.snapshot())
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return stats, nil
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}
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func (s *stats) Write(stat *Stat) error {
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s.buffer.Put(stat)
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return nil
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}
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func (s *stats) Record(err error) error {
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s.Lock()
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defer s.Unlock()
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// increment the total request count
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s.requests++
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// increment the error count
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if err != nil {
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s.errors++
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}
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return nil
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}
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// NewStats returns a new in memory stats buffer
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// TODO add options
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func NewStats() Stats {
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return &stats{
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started: time.Now().Unix(),
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buffer: ring.New(60),
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}
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}
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