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object_monitor.go
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/
object_monitor.go
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package omcmd
import (
"fmt"
"os"
"time"
"github.com/opensvc/om3/core/client"
"github.com/opensvc/om3/core/monitor"
)
type (
CmdObjectMonitor struct {
OptsGlobal
Watch bool
Sections string
}
)
func (t *CmdObjectMonitor) Run(selector, kind string) error {
defaultSelector := ""
if kind != "" {
defaultSelector = fmt.Sprintf("*/%s/*", kind)
}
mergedSelector := mergeSelector(selector, t.ObjectSelector, kind, defaultSelector)
cli, err := client.New(client.WithURL(t.Server), client.WithTimeout(0))
if err != nil {
return err
}
m := monitor.New()
m.SetColor(t.Color)
m.SetFormat(t.Output)
m.SetSectionsFromExpression(t.Sections)
m.SetSelector(mergedSelector)
if t.Watch {
maxRetries := 600
retries := 0
evReader, err := cli.NewGetEvents().SetSelector(mergedSelector).GetReader()
if err != nil {
return err
}
for {
statusGetter := cli.NewGetDaemonStatus().SetSelector(mergedSelector)
err := m.DoWatch(statusGetter, evReader, os.Stdout)
if err1 := evReader.Close(); err1 != nil {
return fmt.Errorf("object monitor watch error '%s' + close event reader error '%s'", err, err1)
}
if err == nil {
return err
}
for {
retries++
if retries > maxRetries {
return err
} else if retries == 1 {
_, _ = fmt.Fprintf(os.Stderr, "object monitor watch error '%s'\n", err)
_, _ = fmt.Fprintln(os.Stderr, "press ctrl+c to interrupt retries")
}
time.Sleep(time.Second)
evReader, err = cli.NewGetEvents().SetSelector(mergedSelector).GetReader()
if err == nil {
retries = 0
break
}
_, _ = fmt.Fprintf(os.Stderr, "retry %d/%d %s...\n", retries, maxRetries, err)
}
}
} else {
getter := cli.NewGetDaemonStatus().SetSelector(mergedSelector)
if err := m.Do(getter, os.Stdout); err != nil {
return err
}
}
return nil
}