up

os/gmetric/gmetric_attribute.go

@@ -7,7 +7,12 @@
 package gmetric
 
 import (
+	"bytes"
 	"fmt"
+	"os"
+
+	"github.com/gogf/gf/v2/internal/json"
+	"github.com/gogf/gf/v2/os/gfile"
 )
 
 // localAttribute implements interface Attribute.
@@ -16,6 +21,24 @@ type localAttribute struct {
 	value any
 }
 
+var (
+	hostname    string
+	processPath string
+)
+
+func init() {
+	hostname, _ = os.Hostname()
+	processPath = gfile.SelfPath()
+}
+
+// CommonAttributes returns the common used attributes for an instrument.
+func CommonAttributes() Attributes {
+	return Attributes{
+		NewAttribute(`os.host.name`, hostname),
+		NewAttribute(`process.path`, processPath),
+	}
+}
+
 // NewAttribute creates and returns an Attribute by given `key` and `value`.
 func NewAttribute(key string, value any) Attribute {
 	return &localAttribute{
@@ -38,3 +61,31 @@ func (l *localAttribute) Value() any {
 func (l *localAttribute) MarshalJSON() ([]byte, error) {
 	return []byte(fmt.Sprintf(`{"%s":%#v}`, l.key, l.value)), nil
 }
+
+// MarshalJSON implements the interface MarshalJSON for json.Marshal.
+func (attrs Attributes) String() string {
+	bs, _ := attrs.MarshalJSON()
+	return string(bs)
+}
+
+// MarshalJSON implements the interface MarshalJSON for json.Marshal.
+func (attrs Attributes) MarshalJSON() ([]byte, error) {
+	var (
+		bs     []byte
+		err    error
+		buffer = bytes.NewBuffer(nil)
+	)
+	buffer.WriteByte('[')
+	for _, attr := range attrs {
+		bs, err = json.Marshal(attr)
+		if err != nil {
+			return nil, err
+		}
+		if buffer.Len() > 1 {
+			buffer.WriteByte(',')
+		}
+		buffer.Write(bs)
+	}
+	buffer.WriteByte(']')
+	return buffer.Bytes(), nil
+}

os/gmetric/gmetric_z_unit_test.go

@@ -7,6 +7,7 @@
 package gmetric_test
 
 import (
+	"fmt"
 	"testing"
 
 	"github.com/gogf/gf/v2/os/gmetric"
@@ -92,3 +93,11 @@ func Test_Histogram(t *testing.T) {
 		t.Assert(counter.Buckets(), config.Buckets)
 	})
 }
+
+func Test_CommonAttributes(t *testing.T) {
+	gtest.C(t, func(t *gtest.T) {
+		commonAttributes := gmetric.CommonAttributes()
+		t.AssertGT(len(commonAttributes), 1)
+		fmt.Println(commonAttributes)
+	})
+}