linted

snowflake/snowflake.go

@@ -1,7 +1,6 @@
 package snowflake
 
 import (
-	"fmt"
 	"hash/fnv"
 	"math"
 	"net"
@@ -15,42 +14,48 @@ const (
 	nodeIDBits   = 10
 	sequenceBits = 12
 
-	// Custom Epoch (January 1, 2015 Midnight UTC = 2015-01-01T00:00:00Z)
+	// Custom Epoch (January 1, 2015 Midnight UTC = 2015-01-01T00:00:00Z) .
 	customEpoch int64 = 1420070400000
 )
 
-var maxNodeID int64
-var maxSequence int64
+var (
+	maxNodeID      int64
+	maxSequence    int64
+	timestampMutex sync.Mutex
+	sequenceMutex  sync.Mutex
+	nodeID         int64
+	lastTimestamp  int64 = 0
+	sequence       int64
+)
 
-var nodeID int64
-var lastTimestamp int64 = 0
-var sequence int64
+const two = 2
 
 func init() {
-	maxNodeID = int64(math.Pow(2, nodeIDBits) - 1)
-	maxSequence = int64(math.Pow(2, sequenceBits) - 1)
+	maxNodeID = int64(math.Pow(two, nodeIDBits) - 1)
+	maxSequence = int64(math.Pow(two, sequenceBits) - 1)
 	nodeID = generateNodeID()
 }
 
 func generateNodeID() int64 {
 	var nodeID int64
+
 	if interfaces, err := net.Interfaces(); err == nil {
 		h := fnv.New32a()
 		for _, i := range interfaces {
 			h.Write(i.HardwareAddr)
 		}
+
 		nodeID = int64(h.Sum32())
 	} else {
 		panic("interfaces not available")
 	}
+
 	nodeID = nodeID & maxNodeID
+
 	return nodeID
 }
 
-var timestampMutex sync.Mutex
-var sequenceMutex sync.Mutex
-
-// Next returns the next logical snowflake
+// Next returns the next logical snowflake.
 func Next() int64 {
 	timestampMutex.Lock()
 	currentTimestamp := ts()
@@ -76,7 +81,6 @@ func Next() int64 {
 	id |= (nodeID << sequenceBits)
 	id |= sequence
 
-	fmt.Printf("%b\n", id)
 	return id
 }
 
@@ -88,5 +92,6 @@ func waitNextMillis(currentTimestamp int64) int64 {
 	for currentTimestamp == lastTimestamp {
 		currentTimestamp = ts()
 	}
+
 	return currentTimestamp
 }

snowflake/snowflake_test.go

@@ -9,7 +9,6 @@ func TestNext(t *testing.T) {
 	fmt.Printf("node id: %b\n", generateNodeID())
 	fmt.Printf("timestamp: %b\n", ts())
 	fmt.Printf("full token: %b\n", Next())
-	// t.Fail()
 }
 
 func BenchmarkNext(b *testing.B) {