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interface.go
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interface.go
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// +build windows
package windows
import (
"fmt"
"net"
"sort"
"strings"
"syscall"
"time"
"github.com/mackerelio/golib/logging"
"github.com/mackerelio/mackerel-agent/metrics"
"github.com/mackerelio/mackerel-agent/util/windows"
)
// InterfaceGenerator XXX
type InterfaceGenerator struct {
Interval time.Duration
query syscall.Handle
counters []*windows.CounterInfo
}
var interfaceLogger = logging.GetLogger("metrics.interface")
func normalizeName(s string) string {
return strings.Map(func(r rune) rune {
if ('0' <= r && r <= '9') || ('a' <= r && r <= 'z') || ('A' <= r && r <= 'Z') || r == '-' {
return r
}
return '_'
}, s)
}
// NewInterfaceGenerator XXX
func NewInterfaceGenerator(interval time.Duration) (*InterfaceGenerator, error) {
g := &InterfaceGenerator{interval, 0, nil}
var err error
g.query, err = windows.CreateQuery()
if err != nil {
interfaceLogger.Criticalf(err.Error())
return nil, err
}
ifs, err := net.Interfaces()
if err != nil {
interfaceLogger.Criticalf(err.Error())
return nil, err
}
ai, err := windows.GetAdapterList()
if err != nil {
interfaceLogger.Criticalf(err.Error())
return nil, err
}
first := ai
// make sorted list of names to escape device names.
names := []string{}
for ai = first; ai != nil; ai = ai.Next {
name, err := windows.AnsiBytePtrToString(&ai.Description[0])
if err == nil {
names = append(names, name)
}
}
sort.Strings(names)
// make map for original/escaped. if the names can be duplicated, following
// name should be renamed with underbar-ed suffixes.
nameMap := make(map[string]string)
for _, name := range names {
escaped := normalizeName(name)
for {
if _, ok := nameMap[escaped]; !ok {
break
}
escaped += "_"
}
nameMap[name] = escaped
}
for _, ifi := range ifs {
for ai = first; ai != nil; ai = ai.Next {
if ifi.Index == int(ai.Index) {
name, err := windows.AnsiBytePtrToString(&ai.Description[0])
if err != nil {
name = windows.BytePtrToString(&ai.Description[0])
}
// convert to escaped name
escaped, ok := nameMap[name]
if !ok {
continue
}
name = strings.Replace(name, "(", "[", -1)
name = strings.Replace(name, ")", "]", -1)
name = strings.Replace(name, "#", "_", -1)
var counter *windows.CounterInfo
counter, err = windows.CreateCounter(
g.query,
fmt.Sprintf(`interface.%s.rxBytes.delta`, escaped),
fmt.Sprintf(`\Network Interface(%s)\Bytes Received/sec`, name))
if err != nil {
interfaceLogger.Criticalf(err.Error())
return nil, err
}
g.counters = append(g.counters, counter)
counter, err = windows.CreateCounter(
g.query,
fmt.Sprintf(`interface.%s.txBytes.delta`, escaped),
fmt.Sprintf(`\Network Interface(%s)\Bytes Sent/sec`, name))
if err != nil {
interfaceLogger.Criticalf(err.Error())
return nil, err
}
g.counters = append(g.counters, counter)
}
}
}
r, _, err := windows.PdhCollectQueryData.Call(uintptr(g.query))
if r != 0 && err != nil {
if r == windows.PDH_NO_DATA {
interfaceLogger.Infof("this metric has not data. ")
return nil, err
}
interfaceLogger.Criticalf(err.Error())
return nil, err
}
return g, nil
}
// Generate XXX
func (g *InterfaceGenerator) Generate() (metrics.Values, error) {
time.Sleep(g.Interval)
r, _, err := windows.PdhCollectQueryData.Call(uintptr(g.query))
if r != 0 && err != nil {
if r == windows.PDH_NO_DATA {
interfaceLogger.Infof("this metric has not data. ")
return nil, err
}
return nil, err
}
results := make(map[string]float64)
for _, v := range g.counters {
results[v.PostName], err = windows.GetCounterValue(v.Counter)
if err != nil {
return nil, err
}
}
interfaceLogger.Debugf("%q", results)
return results, nil
}