fixed ssredis uid generator

backend/ssredis/ssredis.go

@@ -7,7 +7,11 @@ import (
 	"github.com/go-redis/redis"
 	ss "github.com/raz-varren/sacrificial-socket"
 	"github.com/raz-varren/log"
-	"github.com/raz-varren/sacrificial-socket/tools"
+	"encoding/hex"
+)
+
+var(
+	rng = ss.NewRNG()
 )
 
 const (
@@ -60,7 +64,9 @@ func NewBackend(rOpts *redis.Options, ssrOpts *Options) (*RMHB, error) {
 	}
 
 	if ssrOpts.ServerName == "" {
-		ssrOpts.ServerName = tools.UID()
+		uid := make([]byte, 16)
+		rng.Read(uid)
+		ssrOpts.ServerName = hex.EncodeToString(uid)
 	}
 
 	roomPSName := ssrOpts.ServerGroup + ":_ss_roomcasts"

rng.go

@@ -0,0 +1,28 @@
+package ss
+
+import(
+	"math/rand"
+	"sync"
+	"time"
+)
+
+//RNG is a random number generator that is safe for concurrent use by multiple go routines
+type RNG struct {
+	r  *rand.Rand
+	mu *sync.Mutex
+}
+
+//Read reads len(b) random bytes into b and never returns a nil error
+func (r *RNG) Read(b []byte) (int, error) {
+	r.mu.Lock()
+	defer r.mu.Unlock()
+	return r.r.Read(b)
+}
+
+//NewRNG creates a new random number generator
+func NewRNG() *RNG {
+	return &RNG{
+		r:  rand.New(rand.NewSource(time.Now().UnixNano())),
+		mu: &sync.Mutex{},
+	}
+}

socket.go

@@ -6,13 +6,11 @@ import (
 	"encoding/json"
 	"github.com/gorilla/websocket"
 	"github.com/raz-varren/log"
-	"math/rand"
 	"sync"
-	"time"
 )
 
 var (
-	socketRNG = newRNG()
+	socketRNG = NewRNG()
 )
 
 //Socket represents a websocket connection
@@ -190,21 +188,3 @@ func (s *Socket) Close() {
 
 	s.serv.hub.removeSocket(s)
 }
-
-type rng struct {
-	r  *rand.Rand
-	mu *sync.Mutex
-}
-
-func (r *rng) Read(b []byte) (int, error) {
-	r.mu.Lock()
-	defer r.mu.Unlock()
-	return r.r.Read(b)
-}
-
-func newRNG() *rng {
-	return &rng{
-		r:  rand.New(rand.NewSource(time.Now().UnixNano())),
-		mu: &sync.Mutex{},
-	}
-}