1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
|
<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\DependencyInjection\Compiler;
use Symfony\Component\DependencyInjection\ContainerBuilder;
use Symfony\Component\DependencyInjection\Exception\ServiceCircularReferenceException;
/**
* Checks your services for circular references.
*
* References from method calls are ignored since we might be able to resolve
* these references depending on the order in which services are called.
*
* Circular reference from method calls will only be detected at run-time.
*
* @author Johannes M. Schmitt <schmittjoh@gmail.com>
*/
class CheckCircularReferencesPass implements CompilerPassInterface
{
private $currentPath;
private $checkedNodes;
/**
* Checks the ContainerBuilder object for circular references.
*/
public function process(ContainerBuilder $container)
{
$graph = $container->getCompiler()->getServiceReferenceGraph();
$this->checkedNodes = [];
foreach ($graph->getNodes() as $id => $node) {
$this->currentPath = [$id];
$this->checkOutEdges($node->getOutEdges());
}
}
/**
* Checks for circular references.
*
* @param ServiceReferenceGraphEdge[] $edges An array of Edges
*
* @throws ServiceCircularReferenceException when a circular reference is found
*/
private function checkOutEdges(array $edges)
{
foreach ($edges as $edge) {
$node = $edge->getDestNode();
$id = $node->getId();
if (empty($this->checkedNodes[$id])) {
// Don't check circular references for lazy edges
if (!$node->getValue() || (!$edge->isLazy() && !$edge->isWeak())) {
$searchKey = array_search($id, $this->currentPath);
$this->currentPath[] = $id;
if (false !== $searchKey) {
throw new ServiceCircularReferenceException($id, \array_slice($this->currentPath, $searchKey));
}
$this->checkOutEdges($node->getOutEdges());
}
$this->checkedNodes[$id] = true;
array_pop($this->currentPath);
}
}
}
}
|
