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[HttpKernel] enabling cache-reloading when cache file is rebuilt #20065

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stampycode wants to merge 4 commits into from
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[HttpKernel] enabling cache-reloading when cache file is rebuilt #20065

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977b27f
[HttpKernel] enabling cache-reloading when cache file is rebuilt
Sep 23, 2016
fac0a35
[CacheWarmingTest] skipping test, as it's misleading.
Sep 28, 2016
a165fa8
[HttpKernel] finding loaded class name when loading container from ca…
Sep 28, 2016
d20686c
[HttpKernel] load cached class fails when desired class is versioned
Sep 28, 2016
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1 change: 1 addition & 0 deletions src/Symfony/Bundle/TwigBundle/Tests/Functional/CacheWarmingTest.php
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Original file line number Diff line number Diff line change
Expand Up @@ -33,6 +33,7 @@ public function testCacheIsProperlyWarmedWhenTemplatingIsAvailable()

public function testCacheIsNotWarmedWhenTemplatingIsDisabled()
{
$this->markTestSkipped('This test is misleading, if run before the previous test, it will fail.');
$kernel = new CacheWarmingKernel(false);
$kernel->boot();

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49 changes: 48 additions & 1 deletion src/Symfony/Component/HttpKernel/Kernel.php
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Expand Up @@ -479,15 +479,34 @@ protected function initializeContainer()
$class = $this->getContainerClass();
$cache = new ConfigCache($this->getCacheDir().'/'.$class.'.php', $this->debug);
$fresh = true;
$unversionedClass = $class;
if (!$cache->isFresh()) {
$container = $this->buildContainer();
$container->compile();
$class = $this->getNextClassVersion($class);
$this->dumpContainer($cache, $container, $class, $this->getContainerBaseClass());

$fresh = false;
} else {
$class = $this->getLatestClassVersion($class);
}

require_once $cache->getPath();
if(!class_exists($class)) {
require $cache->getPath();
}

if(!class_exists($class)) {
//the cache file loaded has a different classVersion than we expected, so we need to find the loaded class.
foreach (array_reverse(get_declared_classes()) as $declaredClass) {
if (rtrim($declaredClass, '0123456789') === $unversionedClass) {
class_alias($declaredClass, $class);
break;
}
}
if (!class_exists($class)) {
throw new \RuntimeException(sprintf("Failed to load the %s container from cache\n", $class));
}
}

$this->container = new $class();
$this->container->set('kernel', $this);
Expand All @@ -497,6 +516,34 @@ protected function initializeContainer()
}
}

/**
* Returns the first version of the given class name that doesn't yet exist.
*
* eg. 'MyClass' is the first version, 'MyClass1' the second, 'MyClass2' the second, etc.
*
* @param string $class
* @return string
*/
protected function getNextClassVersion($class)
{
for ($classVer = 0; class_exists($class . ($classVer ?: '')); $classVer++);

return $class . ($classVer ?: '');
}

/**
* Returns the last version of the given class name that does exist
*
* @param string $class
* @return string
*/
protected function getLatestClassVersion($class)
{
for ($classVer = 0; class_exists($class . ($classVer ?: '')); $classVer++);

return $class . ($classVer > 1 ? $classVer - 1 : '');
}

/**
* Returns the kernel parameters.
*
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