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Add option to enable wildcard expansion (#4265)

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This is needed because wildcard expansion causes counters to be localized.
This commit is contained in:
Vlasta Hajek
2018-06-11 20:10:53 +02:00
committed by Daniel Nelson
parent 87f711a19a
commit 1690f36b09
6 changed files with 471 additions and 56 deletions
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29
plugins/inputs/win_perf_counters/performance_query.go
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@@ -9,6 +9,12 @@ import (
"unsafe"
)
//PerformanceQuery is abstraction for PDH_FMT_COUNTERVALUE_ITEM_DOUBLE
type CounterValue struct {
InstanceName string
Value float64
}
//PerformanceQuery provides wrappers around Windows performance counters API for easy usage in GO
type PerformanceQuery interface {
Open() error
@@ -18,6 +24,7 @@ type PerformanceQuery interface {
GetCounterPath(counterHandle PDH_HCOUNTER) (string, error)
ExpandWildCardPath(counterPath string) ([]string, error)
GetFormattedCounterValueDouble(hCounter PDH_HCOUNTER) (float64, error)
GetFormattedCounterArrayDouble(hCounter PDH_HCOUNTER) ([]CounterValue, error)
CollectData() error
AddEnglishCounterSupported() bool
}
@@ -151,6 +158,28 @@ func (m *PerformanceQueryImpl) GetFormattedCounterValueDouble(hCounter PDH_HCOUN
}
}
func (m *PerformanceQueryImpl) GetFormattedCounterArrayDouble(hCounter PDH_HCOUNTER) ([]CounterValue, error) {
var buffSize uint32
var itemCount uint32
ret := PdhGetFormattedCounterArrayDouble(hCounter, &buffSize, &itemCount, nil)
if ret == PDH_MORE_DATA {
buff := make([]byte, buffSize)
ret = PdhGetFormattedCounterArrayDouble(hCounter, &buffSize, &itemCount, &buff[0])
if ret == ERROR_SUCCESS {
items := (*[1 << 20]PDH_FMT_COUNTERVALUE_ITEM_DOUBLE)(unsafe.Pointer(&buff[0]))[:itemCount]
values := make([]CounterValue, 0, itemCount)
for _, item := range items {
if item.FmtValue.CStatus == PDH_CSTATUS_VALID_DATA || item.FmtValue.CStatus == PDH_CSTATUS_NEW_DATA {
val := CounterValue{UTF16PtrToString(item.SzName), item.FmtValue.DoubleValue}
values = append(values, val)
}
}
return values, nil
}
}
return nil, NewPdhError(ret)
}
func (m *PerformanceQueryImpl) CollectData() error {
if m.query == 0 {
return errors.New("uninitialised query")