AddsThrow NoNodesAvailableException when cannot select any node

.gitignore

@@ -4,3 +4,4 @@ composer.lock
 *.bak
 /phpunit.xml
 /.phpunit.result.cache
+.idea

src/Exception/NoNodesAvailableException.php

@@ -0,0 +1,18 @@
+<?php
+
+declare(strict_types=1);
+/**
+ * This file is part of jet.
+ *
+ * @link     https://github.com/friendsofhyperf/jet
+ * @document https://github.com/friendsofhyperf/jet/blob/main/README.md
+ * @contact  huangdijia@gmail.com
+ * @license  https://github.com/friendsofhyperf/jet/blob/main/LICENSE
+ */
+namespace FriendsOfHyperf\Jet\Exception;
+
+use RuntimeException;
+
+class NoNodesAvailableException extends RuntimeException
+{
+}

src/LoadBalancer/Random.php

@@ -11,6 +11,8 @@
  */
 namespace FriendsOfHyperf\Jet\LoadBalancer;
 
+use FriendsOfHyperf\Jet\Exception\NoNodesAvailableException;
+
 class Random extends AbstractLoadBalancer
 {
     /**
@@ -19,7 +21,7 @@ class Random extends AbstractLoadBalancer
     public function select(): Node
     {
         if (empty($this->nodes)) {
-            throw new \RuntimeException('Cannot select any node from load balancer.');
+            throw new NoNodesAvailableException('Cannot select any node from load balancer.');
         }
 
         $key = array_rand($this->nodes);

src/LoadBalancer/RoundRobin.php

@@ -11,7 +11,7 @@
  */
 namespace FriendsOfHyperf\Jet\LoadBalancer;
 
-use RuntimeException;
+use FriendsOfHyperf\Jet\Exception\NoNodesAvailableException;
 
 class RoundRobin extends AbstractLoadBalancer
 {
@@ -28,7 +28,7 @@ public function select(): Node
         $count = count($this->nodes);
 
         if ($count <= 0) {
-            throw new RuntimeException('Nodes missing.');
+            throw new NoNodesAvailableException('Nodes missing.');
         }
 
         $item = $this->nodes[self::$current % $count];

src/Transporter/StreamSocketTransporter.php

@@ -27,7 +27,7 @@ class StreamSocketTransporter extends AbstractTransporter
     protected $client;
 
     /**
-     * @var float
+     * @var int
      */
     protected $timeout;