Breakup the system plugin

plugins/system/cpu.go

@@ -0,0 +1,50 @@
+package system
+
+import (
+	"fmt"
+
+	"github.com/influxdb/tivan/plugins"
+)
+
+type CPUStats struct {
+	ps PS
+}
+
+func (_ *CPUStats) Description() string {
+	return "Read metrics about cpu usage"
+}
+
+func (_ *CPUStats) SampleConfig() string { return "" }
+
+func (s *CPUStats) Gather(acc plugins.Accumulator) error {
+	times, err := s.ps.CPUTimes()
+	if err != nil {
+		return fmt.Errorf("error getting CPU info: %s", err)
+	}
+
+	for _, cts := range times {
+		tags := map[string]string{
+			"cpu": cts.CPU,
+		}
+
+		add(acc, "user", cts.User, tags)
+		add(acc, "system", cts.System, tags)
+		add(acc, "idle", cts.Idle, tags)
+		add(acc, "nice", cts.Nice, tags)
+		add(acc, "iowait", cts.Iowait, tags)
+		add(acc, "irq", cts.Irq, tags)
+		add(acc, "softirq", cts.Softirq, tags)
+		add(acc, "steal", cts.Steal, tags)
+		add(acc, "guest", cts.Guest, tags)
+		add(acc, "guestNice", cts.GuestNice, tags)
+		add(acc, "stolen", cts.Stolen, tags)
+	}
+
+	return nil
+}
+
+func init() {
+	plugins.Add("cpu", func() plugins.Plugin {
+		return &CPUStats{ps: &systemPS{}}
+	})
+}