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package widgets
import (
"fmt"
"log"
"time"
"github.com/prometheus/client_golang/prometheus"
psMem "github.com/shirou/gopsutil/mem"
ui "github.com/xxxserxxx/gotop/termui"
"github.com/xxxserxxx/gotop/utils"
)
type MemWidget struct {
*ui.LineGraph
updateInterval time.Duration
mainMetric prometheus.Gauge
swapMetric prometheus.Gauge
}
type MemoryInfo struct {
Total uint64
Used uint64
UsedPercent float64
}
func (self *MemWidget) renderMemInfo(line string, memoryInfo MemoryInfo) {
self.Data[line] = append(self.Data[line], memoryInfo.UsedPercent)
memoryTotalBytes, memoryTotalMagnitude := utils.ConvertBytes(memoryInfo.Total)
memoryUsedBytes, memoryUsedMagnitude := utils.ConvertBytes(memoryInfo.Used)
self.Labels[line] = fmt.Sprintf("%3.0f%% %5.1f%s/%.0f%s",
memoryInfo.UsedPercent,
memoryUsedBytes,
memoryUsedMagnitude,
memoryTotalBytes,
memoryTotalMagnitude,
)
}
func (self *MemWidget) updateMainMemory() {
mainMemory, err := psMem.VirtualMemory()
if err != nil {
log.Printf("failed to get main memory info from gopsutil: %v", err)
} else {
self.renderMemInfo("Main", MemoryInfo{
Total: mainMemory.Total,
Used: mainMemory.Used,
UsedPercent: mainMemory.UsedPercent,
})
if self.mainMetric != nil {
self.mainMetric.Set(mainMemory.UsedPercent)
}
}
}
func NewMemWidget(updateInterval time.Duration, horizontalScale int) *MemWidget {
self := &MemWidget{
LineGraph: ui.NewLineGraph(),
updateInterval: updateInterval,
}
self.Title = " Memory Usage "
self.HorizontalScale = horizontalScale
self.Data["Main"] = []float64{0}
self.Data["Swap"] = []float64{0}
self.updateMainMemory()
self.updateSwapMemory()
go func() {
for range time.NewTicker(self.updateInterval).C {
self.Lock()
self.updateMainMemory()
self.updateSwapMemory()
self.Unlock()
}
}()
return self
}
func (b *MemWidget) EnableMetric() {
b.mainMetric = prometheus.NewGauge(prometheus.GaugeOpts{
Namespace: "gotop",
Subsystem: "memory",
Name: "main",
})
mainMemory, err := psMem.VirtualMemory()
if err == nil {
b.mainMetric.Set(mainMemory.UsedPercent)
}
prometheus.MustRegister(b.mainMetric)
b.swapMetric = prometheus.NewGauge(prometheus.GaugeOpts{
Namespace: "gotop",
Subsystem: "memory",
Name: "swap",
})
swapMemory, err := psMem.SwapMemory()
if err == nil {
b.swapMetric.Set(swapMemory.UsedPercent)
}
prometheus.MustRegister(b.swapMetric)
}
func (b *MemWidget) Scale(i int) {
b.LineGraph.HorizontalScale = i
}
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