Refactor collectors

Signed-off-by: Jan-Otto Kröpke <mail@jkroepke.de>

pkg/collector/netframework_clrinterop/netframework_clrinterop.go

@@ -0,0 +1,130 @@
+//go:build windows
+
+package netframework_clrinterop
+
+import (
+	"github.com/prometheus-community/windows_exporter/pkg/types"
+	"github.com/prometheus-community/windows_exporter/pkg/wmi"
+
+	"github.com/alecthomas/kingpin/v2"
+	"github.com/go-kit/log"
+	"github.com/go-kit/log/level"
+	"github.com/prometheus/client_golang/prometheus"
+)
+
+const Name = "netframework_clrinterop"
+
+type Config struct{}
+
+var ConfigDefaults = Config{}
+
+// A collector is a Prometheus collector for WMI Win32_PerfRawData_NETFramework_NETCLRInterop metrics
+type collector struct {
+	logger log.Logger
+
+	NumberofCCWs        *prometheus.Desc
+	Numberofmarshalling *prometheus.Desc
+	NumberofStubs       *prometheus.Desc
+}
+
+func New(logger log.Logger, _ *Config) types.Collector {
+	c := &collector{}
+	c.SetLogger(logger)
+	return c
+}
+
+func NewWithFlags(_ *kingpin.Application) types.Collector {
+	return &collector{}
+}
+
+func (c *collector) GetName() string {
+	return Name
+}
+
+func (c *collector) SetLogger(logger log.Logger) {
+	c.logger = log.With(logger, "collector", Name)
+}
+
+func (c *collector) GetPerfCounter() ([]string, error) {
+	return []string{}, nil
+}
+
+func (c *collector) Build() error {
+	c.NumberofCCWs = prometheus.NewDesc(
+		prometheus.BuildFQName(types.Namespace, Name, "com_callable_wrappers_total"),
+		"Displays the current number of COM callable wrappers (CCWs). A CCW is a proxy for a managed object being referenced from an unmanaged COM client.",
+		[]string{"process"},
+		nil,
+	)
+	c.Numberofmarshalling = prometheus.NewDesc(
+		prometheus.BuildFQName(types.Namespace, Name, "interop_marshalling_total"),
+		"Displays the total number of times arguments and return values have been marshaled from managed to unmanaged code, and vice versa, since the application started.",
+		[]string{"process"},
+		nil,
+	)
+	c.NumberofStubs = prometheus.NewDesc(
+		prometheus.BuildFQName(types.Namespace, Name, "interop_stubs_created_total"),
+		"Displays the current number of stubs created by the common language runtime. Stubs are responsible for marshaling arguments and return values from managed to unmanaged code, and vice versa, during a COM interop call or a platform invoke call.",
+		[]string{"process"},
+		nil,
+	)
+	return nil
+}
+
+// Collect sends the metric values for each metric
+// to the provided prometheus Metric channel.
+func (c *collector) Collect(_ *types.ScrapeContext, ch chan<- prometheus.Metric) error {
+	if desc, err := c.collect(ch); err != nil {
+		_ = level.Error(c.logger).Log("failed collecting win32_perfrawdata_netframework_netclrinterop metrics", "desc", desc, "err", err)
+		return err
+	}
+	return nil
+}
+
+type Win32_PerfRawData_NETFramework_NETCLRInterop struct {
+	Name string
+
+	NumberofCCWs             uint32
+	Numberofmarshalling      uint32
+	NumberofStubs            uint32
+	NumberofTLBexportsPersec uint32
+	NumberofTLBimportsPersec uint32
+}
+
+func (c *collector) collect(ch chan<- prometheus.Metric) (*prometheus.Desc, error) {
+	var dst []Win32_PerfRawData_NETFramework_NETCLRInterop
+	q := wmi.QueryAll(&dst, c.logger)
+	if err := wmi.Query(q, &dst); err != nil {
+		return nil, err
+	}
+
+	for _, process := range dst {
+
+		if process.Name == "_Global_" {
+			continue
+		}
+
+		ch <- prometheus.MustNewConstMetric(
+			c.NumberofCCWs,
+			prometheus.CounterValue,
+			float64(process.NumberofCCWs),
+			process.Name,
+		)
+
+		ch <- prometheus.MustNewConstMetric(
+			c.Numberofmarshalling,
+			prometheus.CounterValue,
+			float64(process.Numberofmarshalling),
+			process.Name,
+		)
+
+		ch <- prometheus.MustNewConstMetric(
+			c.NumberofStubs,
+			prometheus.CounterValue,
+			float64(process.NumberofStubs),
+			process.Name,
+		)
+	}
+
+	return nil, nil
+}

pkg/collector/netframework_clrinterop/netframework_clrinterop_test.go

@@ -0,0 +1,13 @@
+package netframework_clrinterop_test
+
+import (
+	"testing"
+
+	"github.com/prometheus-community/windows_exporter/pkg/collector/netframework_clrinterop"
+	"github.com/prometheus-community/windows_exporter/pkg/testutils"
+)
+
+func BenchmarkCollector(b *testing.B) {
+	// No context name required as collector source is WMI
+	testutils.FuncBenchmarkCollector(b, netframework_clrinterop.Name, netframework_clrinterop.NewWithFlags)
+}