Merge pull request #46 from aliiohs/exposeMaxWheelTimeSpan

Fix:ExposeMaxWheelTimeSpan

session.go

@@ -45,7 +45,8 @@ const (
 	pendingDuration = 3e9
 	defaultQLen     = 1024
 	maxIovecNum     = 10
-	maxWheelTimeSpan = 900e9 // 900s, 15 minute
+	//MaxWheelTimeSpan 900s, 15 minute
+	MaxWheelTimeSpan = 900e9
 
 	defaultSessionName    = "session"
 	defaultTCPSessionName = "tcp-session"
@@ -65,7 +66,7 @@ var (
 
 func init() {
 	span := 100e6 // 100ms
-	buckets := maxWheelTimeSpan / span
+	buckets := MaxWheelTimeSpan / span
 	wheel = gxtime.NewWheel(time.Duration(span), int(buckets)) // wheel longest span is 15 minute
 }