Atomic creation of Proxy files

From 265e5086ea51ebcafc73f91abc64334d17e2f416 Mon Sep 17 00:00:00 2001
From: Karsten Dambekalns <karsten@typo3.org>
Date: Wed, 25 May 2011 12:11:55 +0200
Subject: [PATCH 4/5] Use temporary file and rename for proxy class creation

Instead of a simple file_put_contents() the proxy class code is written to a
temporary file and renamed to the final filename. This allows file access even
if only allowed by the directory permission.
---
 lib/Doctrine/ORM/Proxy/ProxyFactory.php |   10 +++++++++-
 1 files changed, 9 insertions(+), 1 deletions(-)

diff --git a/lib/Doctrine/ORM/Proxy/ProxyFactory.php b/lib/Doctrine/ORM/Proxy/ProxyFactory.php
index f0cf19c..b2d42fb 100644
--- a/lib/Doctrine/ORM/Proxy/ProxyFactory.php
+++ b/lib/Doctrine/ORM/Proxy/ProxyFactory.php
@@ -152,7 +152,15 @@ class ProxyFactory
 
         $file = str_replace($placeholders, $replacements, $file);
 
-        file_put_contents($fileName, $file, LOCK_EX);
+        $temporaryFileName = $fileName . uniqid( ) . '.temp';
+        $result = file_put_contents( $temporaryFileName, $file );
+
+        if($result === FALSE) throw new \RuntimeException('The temporary proxy class file "' . $temporaryFileName . '" could not be written.');
+        $i = 0;
+        while(!rename( $temporaryFileName, $fileName ) && $i < 5) {
+            $i++;
+        }
+        if($result === FALSE) throw new \RuntimeException('The proxy class file "' . $fileName . '" could not be written.');
     }
 
     /**
-- 
1.7.4.1