Ban system metric collector for windows OS(#312)

Author: binbin0325

api/init.go

@@ -6,10 +6,10 @@ import (
 	"github.com/alibaba/sentinel-golang/core/config"
 	"github.com/alibaba/sentinel-golang/core/log/metric"
 	"github.com/alibaba/sentinel-golang/core/system"
+	"github.com/alibaba/sentinel-golang/logging"
 	"github.com/alibaba/sentinel-golang/util"
 )
 
-// InitDefault initializes Sentinel using the configuration from system
 // environment and the default value.
 func InitDefault() error {
 	return initSentinel("")
@@ -50,8 +50,12 @@ func initCoreComponents() error {
 	if err := metric.InitTask(); err != nil {
 		return err
 	}
+	if !util.IsWindowsOS() {
+		system.InitCollector(config.SystemStatCollectIntervalMs())
+	} else {
+		logging.Warn("[Init initCoreComponents] system metric collect is not available for system module in windows")
+	}
 
-	system.InitCollector(config.SystemStatCollectIntervalMs())
 	if config.UseCacheTime() {
 		util.StartTimeTicker()
 	}

core/system/slot.go

@@ -3,6 +3,7 @@ package system
 import (
 	"github.com/alibaba/sentinel-golang/core/base"
 	"github.com/alibaba/sentinel-golang/core/stat"
+	"github.com/alibaba/sentinel-golang/util"
 )
 
 type AdaptiveSlot struct {
@@ -12,6 +13,10 @@ func (s *AdaptiveSlot) Check(ctx *base.EntryContext) *base.TokenResult {
 	if ctx == nil || ctx.Resource == nil || ctx.Resource.FlowType() != base.Inbound {
 		return nil
 	}
+	// system module is not available for windows OS
+	if util.IsWindowsOS() {
+		return nil
+	}
 	rules := GetRules()
 	result := ctx.RuleCheckResult
 	for _, rule := range rules {

util/safe.go

@@ -1,6 +1,9 @@
 package util
 
-import "unsafe"
+import (
+	"runtime"
+	"unsafe"
+)
 
 // SliceHeader is a safe version of SliceHeader used within this project.
 type SliceHeader struct {
@@ -14,3 +17,9 @@ type StringHeader struct {
 	Data unsafe.Pointer
 	Len  int
 }
+
+const windows = "windows"
+
+func IsWindowsOS() bool {
+	return runtime.GOOS == windows
+}