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interface.go
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interface.go
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// +build windows
package windows
import (
"fmt"
"net"
"strings"
"syscall"
"time"
"unsafe"
"github.com/mackerelio/mackerel-agent/logging"
"github.com/mackerelio/mackerel-agent/metrics"
. "github.com/mackerelio/mackerel-agent/util/windows"
)
type InterfaceGenerator struct {
Interval time.Duration
query syscall.Handle
counters []*CounterInfo
}
var interfaceLogger = logging.GetLogger("metrics.interface")
func NewInterfaceGenerator(interval time.Duration) (*InterfaceGenerator, error) {
g := &InterfaceGenerator{interval, 0, nil}
var err error
g.query, err = 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 := GetAdapterList()
if err != nil {
interfaceLogger.Criticalf(err.Error())
return nil, err
}
for _, ifi := range ifs {
for ; ai != nil; ai = ai.Next {
if ifi.Index == int(ai.Index) {
name := BytePtrToString(&ai.Description[0])
name = strings.Replace(name, "(", "[", -1)
name = strings.Replace(name, ")", "]", -1)
var counter *CounterInfo
counter, err = CreateCounter(
g.query,
fmt.Sprintf(`interface.nic%d.rxBytes.delta`, ifi.Index),
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 = CreateCounter(
g.query,
fmt.Sprintf(`interface.nic%d.txBytes.delta`, ifi.Index),
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 := PdhCollectQueryData.Call(uintptr(g.query))
if r != 0 && err != nil {
interfaceLogger.Criticalf(err.Error())
return nil, err
}
return g, nil
}
func (g *InterfaceGenerator) Generate() (metrics.Values, error) {
interval := g.Interval * time.Second
time.Sleep(interval)
r, _, err := PdhCollectQueryData.Call(uintptr(g.query))
if r != 0 {
return nil, err
}
results := make(map[string]float64)
for _, v := range g.counters {
var value PDH_FMT_COUNTERVALUE_ITEM_DOUBLE
r, _, err = PdhGetFormattedCounterValue.Call(uintptr(v.Counter), PDH_FMT_DOUBLE, uintptr(0), uintptr(unsafe.Pointer(&value)))
if r != 0 && r != PDH_INVALID_DATA {
return nil, err
}
results[v.PostName] = value.FmtValue.DoubleValue
}
return results, nil
}