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expvarmon/ui_termui.go
2015-05-01 16:49:19 +03:00

131 lines
3.1 KiB
Go

package main
import (
"fmt"
"log"
"github.com/divan/termui"
)
// TermUI is a termUI implementation of UI interface.
type TermUI struct {
Title *termui.Par
Status *termui.Par
Services *termui.List
Values map[string]*termui.List
MemSparkline *termui.Sparklines
}
func (t *TermUI) Init(data UIData) {
err := termui.Init()
if err != nil {
log.Fatal(err)
}
t.Values = make(map[string]*termui.List)
termui.UseTheme("helloworld")
t.Title = func() *termui.Par {
p := termui.NewPar("")
p.Height = 3
p.TextFgColor = termui.ColorWhite
p.Border.Label = "Services Monitor"
p.Border.FgColor = termui.ColorCyan
return p
}()
t.Status = func() *termui.Par {
p := termui.NewPar("")
p.Height = 3
p.TextFgColor = termui.ColorWhite
p.Border.Label = "Status"
p.Border.FgColor = termui.ColorCyan
return p
}()
t.Services = func() *termui.List {
list := termui.NewList()
list.ItemFgColor = termui.ColorGreen
list.Border.Label = "Services"
list.Height = len(data.Services) + 2
return list
}()
for _, name := range data.Vars {
_, ok := t.Values[name]
if !ok {
list := termui.NewList()
list.ItemFgColor = termui.ColorBlue | termui.AttrBold
list.Border.Label = name
list.Height = len(data.Services) + 2
t.Values[name] = list
}
}
t.MemSparkline = func() *termui.Sparklines {
var sparklines []termui.Sparkline
for _, service := range data.Services {
spl := termui.NewSparkline()
spl.Height = 1
spl.LineColor = termui.ColorGreen
spl.Title = service.Name
sparklines = append(sparklines, spl)
}
s := termui.NewSparklines(sparklines...)
s.Height = 2*len(data.Services) + 2
s.HasBorder = true
s.Border.Label = "Memory Track"
return s
}()
col := termui.NewCol(2, 0, t.Services)
col1 := termui.NewCol(3, 0, t.Values[data.Vars[0]])
col2 := termui.NewCol(3, 0, t.Values[data.Vars[1]])
col3 := termui.NewCol(2, 0, t.Values[data.Vars[2]])
col4 := termui.NewCol(2, 0, t.Values[data.Vars[3]])
valuesRow := termui.NewRow(col, col1, col2, col3, col4)
termui.Body.AddRows(
termui.NewRow(
termui.NewCol(6, 0, t.Title),
termui.NewCol(6, 0, t.Status)),
valuesRow,
termui.NewRow(
termui.NewCol(12, 0, t.MemSparkline)),
)
termui.Body.Align()
}
func (t *TermUI) Update(data UIData) {
t.Title.Text = fmt.Sprintf("monitoring %d services, press q to quit", len(data.Services))
t.Status.Text = fmt.Sprintf("Last update: %v", data.LastTimestamp.Format("15:04:05 02/Jan/06"))
var services []string
for _, service := range data.Services {
services = append(services, service.StatusLine())
}
t.Services.Items = services
for _, name := range data.Vars {
var lines []string
for _, service := range data.Services {
lines = append(lines, service.Value(name))
}
t.Values[name].Items = lines
}
// Sparklines
for i, service := range data.Services {
t.MemSparkline.Lines[i].Title = service.Name
t.MemSparkline.Lines[i].Data = service.Values("memstats.Alloc")
}
termui.Body.Width = termui.TermWidth()
termui.Body.Align()
termui.Render(termui.Body)
}
func (t *TermUI) Close() {
termui.Close()
}