暂存

vendor/illuminate/database/DetectsConcurrencyErrors.php

@@ -0,0 +1,27 @@
+<?php
+
+namespace Illuminate\Database;
+
+use Illuminate\Container\Container;
+use Illuminate\Contracts\Database\ConcurrencyErrorDetector as ConcurrencyErrorDetectorContract;
+use Throwable;
+
+trait DetectsConcurrencyErrors
+{
+    /**
+     * Determine if the given exception was caused by a concurrency error such as a deadlock or serialization failure.
+     *
+     * @param  \Throwable  $e
+     * @return bool
+     */
+    protected function causedByConcurrencyError(Throwable $e)
+    {
+        $container = Container::getInstance();
+
+        $detector = $container->bound(ConcurrencyErrorDetectorContract::class)
+            ? $container[ConcurrencyErrorDetectorContract::class]
+            : new ConcurrencyErrorDetector();
+
+        return $detector->causedByConcurrencyError($e);
+    }
+}