HAR-84: golint fix of utils/singleton

Signed-off-by: Leo Chen <leo@harmony.one>

consensus/consensus.go

@@ -88,7 +88,7 @@ type Consensus struct {
 
 	Log log.Logger
 
-	uniqueIDInstance *utils.UniqueValidatorId
+	uniqueIDInstance *utils.UniqueValidatorID
 }
 
 // BlockConsensusStatus used to keep track of the consensus status of multiple blocks received so far
@@ -173,7 +173,7 @@ func NewConsensus(ip, port, ShardID string, peers []p2p.Peer, leader p2p.Peer) *
 	}
 
 	consensus.Log = log.New()
-	consensus.uniqueIDInstance = utils.GetUniqueValidatorIdInstance()
+	consensus.uniqueIDInstance = utils.GetUniqueValidatorIDInstance()
 
 	return &consensus
 }
@@ -242,7 +242,7 @@ func (consensus *Consensus) AddPeers(peers []p2p.Peer) int {
 		_, ok := consensus.validators.Load(utils.GetUniqueIdFromPeer(peer))
 		if !ok {
 			if peer.ValidatorID == -1 {
-				peer.ValidatorID = int(consensus.uniqueIDInstance.GetUniqueId())
+				peer.ValidatorID = int(consensus.uniqueIDInstance.GetUniqueID())
 			}
 			consensus.validators.Store(utils.GetUniqueIdFromPeer(peer), peer)
 			consensus.PublicKeys = append(consensus.PublicKeys, peer.PubKey)

utils/singleton.go

@@ -7,22 +7,25 @@ import (
 	"sync/atomic"
 )
 
-type UniqueValidatorId struct {
+// UniqueValidatorID defines the structure of unique validator ID
-	uniqueId uint32
+type UniqueValidatorID struct {
+	uniqueID uint32
 }
 
-var instance *UniqueValidatorId
+var instance *UniqueValidatorID
 var once sync.Once
 
-func GetUniqueValidatorIdInstance() *UniqueValidatorId {
+// GetUniqueValidatorIDInstance returns a singleton instance
+func GetUniqueValidatorIDInstance() *UniqueValidatorID {
 	once.Do(func() {
-		instance = &UniqueValidatorId{
+		instance = &UniqueValidatorID{
-			uniqueId: 0,
+			uniqueID: 0,
 		}
 	})
 	return instance
 }
 
-func (s *UniqueValidatorId) GetUniqueId() uint32 {
+// GetUniqueID returns a unique ID and increment the internal variable
-	return atomic.AddUint32(&s.uniqueId, 1)
+func (s *UniqueValidatorID) GetUniqueID() uint32 {
+	return atomic.AddUint32(&s.uniqueID, 1)
 }

utils/singleton_test.go

@@ -6,10 +6,10 @@ import (
 	"time"
 )
 
-var NumThreads int = 20
+var NumThreads = 20
 
 func TestSingleton(t *testing.T) {
-	si := GetUniqueValidatorIdInstance()
+	si := GetUniqueValidatorIDInstance()
 	var wg sync.WaitGroup
 
 	t.Log("unique ID provided by singleton instance")
@@ -18,7 +18,7 @@ func TestSingleton(t *testing.T) {
 		wg.Add(1)
 		go func() {
 			defer wg.Done()
-			t.Logf("id:%v\n", si.GetUniqueId())
+			t.Logf("id:%v\n", si.GetUniqueID())
 			time.Sleep(time.Millisecond)
 
 		}()