Merge branch 'tuoyun' of github.com:OpenIMSDK/Open-IM-Server into tuoyun

pkg/utils/utils.go

@@ -3,9 +3,11 @@ package utils
 import (
 	"github.com/jinzhu/copier"
 	"github.com/pkg/errors"
+	"math/rand"
 	"runtime"
 	"strconv"
 	"strings"
+	"time"
 )
 
 // copy a by b  b->a
@@ -71,3 +73,6 @@ func Difference(slice1, slice2 []uint32) []uint32 {
 	}
 	return n
 }
+func OperationIDGenerator() string {
+	return strconv.FormatInt(time.Now().UnixNano()+int64(rand.Uint32()), 10)
+}