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processor_queue_length.go
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/
processor_queue_length.go
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// +build windows
package windows
import (
"syscall"
"github.com/mackerelio/golib/logging"
"github.com/mackerelio/mackerel-agent/metrics"
"github.com/mackerelio/mackerel-agent/util/windows"
)
// ProcessorQueueLengthGenerator is struct of windows api
type ProcessorQueueLengthGenerator struct {
query syscall.Handle
counters []*windows.CounterInfo
}
var processorQueueLengthLogger = logging.GetLogger("metrics.processor_queue_length")
// NewProcessorQueueLengthGenerator is set up windows api
func NewProcessorQueueLengthGenerator() (*ProcessorQueueLengthGenerator, error) {
g := &ProcessorQueueLengthGenerator{0, nil}
var err error
g.query, err = windows.CreateQuery()
if err != nil {
processorQueueLengthLogger.Criticalf(err.Error())
return nil, err
}
counter, err := windows.CreateCounter(g.query, "processor_queue_length", `\System\Processor Queue Length`)
if err != nil {
processorQueueLengthLogger.Criticalf(err.Error())
return nil, err
}
g.counters = append(g.counters, counter)
return g, nil
}
// Generate XXX
func (g *ProcessorQueueLengthGenerator) Generate() (metrics.Values, error) {
r, _, err := windows.PdhCollectQueryData.Call(uintptr(g.query))
if r != 0 && err != nil {
if r == windows.PDH_NO_DATA {
processorQueueLengthLogger.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
}
}
processorQueueLengthLogger.Debugf("processor_queue_length: %q", results)
return results, nil
}