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[Config] Handle Service/EventSubscriberInterface in ReflectionClassResource #25976

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Merged
merged 1 commit into from
Feb 4, 2018
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[Config] Handle Service/EventSubscriberInterface in ReflectionClassResource #25976

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[Config] Handle Service/EventSubscriberInterface in ReflectionClassRe… 
…source
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@nicolas-grekas
nicolas-grekas committed Jan 31, 2018
commit 67e821b94f304a9f33ad91f492b0a6ebf2424843
17 changes: 16 additions & 1 deletion src/Symfony/Component/Config/Resource/ReflectionClassResource.php
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Expand Up @@ -11,6 +11,9 @@

namespace Symfony\Component\Config\Resource;

use Symfony\Component\DependencyInjection\ServiceSubscriberInterface;
use Symfony\Component\EventDispatcher\EventSubscriberInterface;

/**
* @author Nicolas Grekas <[email protected]>
*/
Expand Down Expand Up @@ -114,7 +117,9 @@ private function computeHash()

private function generateSignature(\ReflectionClass $class)
{
yield $class->getDocComment().$class->getModifiers();
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$class->getModifiers() can change value at runtime, e.g. on PHP 5.5

yield $class->getDocComment();
yield (int) $class->isFinal();
yield (int) $class->isAbstract();

if ($class->isTrait()) {
yield print_r(class_uses($class->name), true);
Expand Down Expand Up @@ -149,6 +154,16 @@ private function generateSignature(\ReflectionClass $class)
yield print_r($defaults, true);
}
}

if ($class->isSubclassOf(EventSubscriberInterface::class)) {
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I'm wondering whether this interface coming from another component should really be hardcoded here. This means that any other package providing a similar feature has no way to invalidate the container.

Could we make a reusable implementation (using a different resource probably), which would work for such cases ?

Note that I have such use case in my own project, and I will soon have it in KnpMenuBundle too.

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@stof that's possible, but that's a new feature. Not the target here, but could be done in another PR.

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OK, actually, other packages can invalidate the cache, but suffer from the issue of invalidating them too often too.

Can you work on creating such new feature for 4.1 though ?

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Can you work on creating such new feature for 4.1 though ?

not quite now, please open an issue :)

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done: #25984

yield EventSubscriberInterface::class;
yield print_r(\call_user_func(array($class->name, 'getSubscribedEvents')), true);
}

if ($class->isSubclassOf(ServiceSubscriberInterface::class)) {
yield ServiceSubscriberInterface::class;
yield print_r(\call_user_func(array($class->name, 'getSubscribedServices')), true);
}
}
}

Expand Down
46 changes: 46 additions & 0 deletions src/Symfony/Component/Config/Tests/Resource/ReflectionClassResourceTest.php
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Expand Up @@ -13,6 +13,8 @@

use PHPUnit\Framework\TestCase;
use Symfony\Component\Config\Resource\ReflectionClassResource;
use Symfony\Component\DependencyInjection\ServiceSubscriberInterface;
use Symfony\Component\EventDispatcher\EventSubscriberInterface;

class ReflectionClassResourceTest extends TestCase
{
Expand Down Expand Up @@ -136,8 +138,52 @@ public function provideHashedSignature()
yield array(0, 14, '/** priv docblock */');
yield array(0, 15, '');
}

public function testEventSubscriber()
{
$res = new ReflectionClassResource(new \ReflectionClass(TestEventSubscriber::class));
$this->assertTrue($res->isFresh(0));

TestEventSubscriber::$subscribedEvents = array(123);
$this->assertFalse($res->isFresh(0));

$res = new ReflectionClassResource(new \ReflectionClass(TestEventSubscriber::class));
$this->assertTrue($res->isFresh(0));
}

public function testServiceSubscriber()
{
$res = new ReflectionClassResource(new \ReflectionClass(TestServiceSubscriber::class));
$this->assertTrue($res->isFresh(0));

TestServiceSubscriber::$subscribedServices = array(123);
$this->assertFalse($res->isFresh(0));

$res = new ReflectionClassResource(new \ReflectionClass(TestServiceSubscriber::class));
$this->assertTrue($res->isFresh(0));
}
}

interface DummyInterface
{
}

class TestEventSubscriber implements EventSubscriberInterface
{
public static $subscribedEvents = array();

public static function getSubscribedEvents()
{
return self::$subscribedEvents;
}
}

class TestServiceSubscriber implements ServiceSubscriberInterface
{
public static $subscribedServices = array();

public static function getSubscribedServices()
{
return self::$subscribedServices;
}
}
3 changes: 2 additions & 1 deletion src/Symfony/Component/Config/composer.json
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Expand Up @@ -22,7 +22,8 @@
"require-dev": {
"symfony/finder": "~3.3|~4.0",
"symfony/yaml": "~3.0|~4.0",
"symfony/dependency-injection": "~3.3|~4.0"
"symfony/dependency-injection": "~3.3|~4.0",
"symfony/event-dispatcher": "~3.3|~4.0"
},
"conflict": {
"symfony/finder": "<3.3",
Expand Down
12 changes: 6 additions & 6 deletions src/Symfony/Component/DependencyInjection/Compiler/RegisterServiceSubscribersPass.php
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Expand Up @@ -56,14 +56,14 @@ protected function processValue($value, $isRoot = false)
}
$class = $value->getClass();

if (!is_subclass_of($class, ServiceSubscriberInterface::class)) {
if (!class_exists($class, false)) {
throw new InvalidArgumentException(sprintf('Class "%s" used for service "%s" cannot be found.', $class, $this->currentId));
}

if (!$r = $this->container->getReflectionClass($class)) {
throw new InvalidArgumentException(sprintf('Class "%s" used for service "%s" cannot be found.', $class, $this->currentId));
}
if (!$r->isSubclassOf(ServiceSubscriberInterface::class)) {
throw new InvalidArgumentException(sprintf('Service "%s" must implement interface "%s".', $this->currentId, ServiceSubscriberInterface::class));
}
$this->container->addObjectResource($class);
$class = $r->name;

$subscriberMap = array();
$declaringClass = (new \ReflectionMethod($class, 'getSubscribedServices'))->class;

Expand Down
16 changes: 7 additions & 9 deletions src/Symfony/Component/EventDispatcher/DependencyInjection/RegisterListenersPass.php
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Expand Up @@ -89,17 +89,15 @@ public function process(ContainerBuilder $container)
$def = $container->getDefinition($id);

// We must assume that the class value has been correctly filled, even if the service is created by a factory
$class = $container->getParameterBag()->resolveValue($def->getClass());
$interface = 'Symfony\Component\EventDispatcher\EventSubscriberInterface';
$class = $def->getClass();

if (!is_subclass_of($class, $interface)) {
if (!class_exists($class, false)) {
throw new InvalidArgumentException(sprintf('Class "%s" used for service "%s" cannot be found.', $class, $id));
}

throw new InvalidArgumentException(sprintf('Service "%s" must implement interface "%s".', $id, $interface));
if (!$r = $container->getReflectionClass($class)) {
throw new InvalidArgumentException(sprintf('Class "%s" used for service "%s" cannot be found.', $class, $id));
}
if (!$r->isSubclassOf(EventSubscriberInterface::class)) {
throw new InvalidArgumentException(sprintf('Service "%s" must implement interface "%s".', $id, EventSubscriberInterface::class));
}
$container->addObjectResource($class);
$class = $r->name;

ExtractingEventDispatcher::$subscriber = $class;
$extractingDispatcher->addSubscriber($extractingDispatcher);
Expand Down