Merge pull request #355 from hramazani/cogs-add-utils-v0.27.1

add util to tracing to get function name, and further COGS constants

tracing/cogs/cogs.go

@@ -2,7 +2,10 @@ package cogs
 
 // const values used in setting span attributes for COGS: Cost Of Goods Sold.
 const (
-	CostOfGoodsKey       = "cogs"
-	CostOfGoodsMethodKey = "cogs.method"
-	CostOfGoodsAccountID = "cogs.accountID"
+	CostOfGoodsKey          = "cogs"
+	CostOfGoodsMethodKey    = "cogs.method"
+	CostOfGoodsAccountID    = "cogs.accountID"
+	CostOfGoodsRDS          = "cogs.rds"
+	CostOfGoodS3            = "cogs.s3"
+	CostOfGoodElasticSearch = "cogs.elasticsearch"
 )

tracing/util.go

@@ -0,0 +1,21 @@
+package tracing
+
+import (
+	"runtime"
+)
+
+// ThisFunction returns calling function name
+func ThisFunction() string {
+	pc := make([]uintptr, 32)
+	runtime.Callers(2, pc)
+	return runtime.FuncForPC(pc[0]).Name()
+}
+
+// Trace returns calling function file name, line number and name
+func Trace() (file string, line int, name string) {
+	pc := make([]uintptr, 32)
+	runtime.Callers(2, pc)
+	f := runtime.FuncForPC(pc[0])
+	file, line = f.FileLine(pc[0])
+	return file, line, f.Name()
+}