暂存

vendor/illuminate/database/DetectsLostConnections.php

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+<?php
+
+namespace Illuminate\Database;
+
+use Illuminate\Container\Container;
+use Illuminate\Contracts\Database\LostConnectionDetector as LostConnectionDetectorContract;
+use Throwable;
+
+trait DetectsLostConnections
+{
+    /**
+     * Determine if the given exception was caused by a lost connection.
+     *
+     * @param  \Throwable  $e
+     * @return bool
+     */
+    protected function causedByLostConnection(Throwable $e)
+    {
+        $container = Container::getInstance();
+
+        $detector = $container->bound(LostConnectionDetectorContract::class)
+            ? $container[LostConnectionDetectorContract::class]
+            : new LostConnectionDetector();
+
+        return $detector->causedByLostConnection($e);
+    }
+}