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[Messager] Simplified MessageBus::__construct() #32340

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Merged
merged 1 commit into from
Jul 3, 2019
Merged

[Messager] Simplified MessageBus::__construct() #32340

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21 changes: 15 additions & 6 deletions src/Symfony/Component/Messenger/MessageBus.php
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Original file line number Diff line number Diff line change
Expand Up @@ -33,17 +33,26 @@ public function __construct(iterable $middlewareHandlers = [])
} elseif (\is_array($middlewareHandlers)) {
$this->middlewareAggregate = new \ArrayObject($middlewareHandlers);
} else {
$this->middlewareAggregate = new class() {
public $aggregate;
public $iterator;
// $this->middlewareAggregate should be an instance of IteratorAggregate.
// When $middlewareHandlers is an Iterator, we wrap it to ensure it is lazy-loaded and can be rewound.
$this->middlewareAggregate = new class($middlewareHandlers) implements \IteratorAggregate {
private $middlewareHandlers;
private $cachedIterator;

public function __construct($middlewareHandlers)
{
$this->middlewareHandlers = $middlewareHandlers;
}

public function getIterator()
{
return $this->aggregate = new \ArrayObject(iterator_to_array($this->iterator, false));
if (null === $this->cachedIterator) {
$this->cachedIterator = new \ArrayObject(iterator_to_array($this->middlewareHandlers, false));
}

return $this->cachedIterator;
}
};
$this->middlewareAggregate->aggregate = &$this->middlewareAggregate;
$this->middlewareAggregate->iterator = $middlewareHandlers;
}
}

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