in memory stats buffer

debug/stats/default.go

@@ -0,0 +1,38 @@
+package stats
+
+import (
+	"github.com/micro/go-micro/debug/buffer"
+)
+
+type stats struct {
+	buffer *buffer.Buffer
+}
+
+func (s *stats) Read() ([]*Stat, error) {
+	// TODO adjustable size and optional read values
+	buf := s.buffer.Get(1)
+	var stats []*Stat
+
+	for _, b := range buf {
+		stat, ok := b.Value.(*Stat)
+		if !ok {
+			continue
+		}
+		stats = append(stats, stat)
+	}
+
+	return stats, nil
+}
+
+func (s *stats) Write(stat *Stat) error {
+	s.buffer.Put(stat)
+	return nil
+}
+
+// NewStats returns a new in memory stats buffer
+// TODO add options
+func NewStats() Stats {
+	return &stats{
+		buffer: buffer.New(1024),
+	}
+}