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<?php |
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namespace Puzzle\AMQP\Workers\Chunks\ChunkAssemblyTrackers; |
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use Puzzle\AMQP\Workers\Chunks\ChunkAssemblyTracker; |
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use Puzzle\ValueObjects\Uuid; |
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use Puzzle\AMQP\Messages\Chunks\ChunkedMessageMetadata; |
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class SingleTrackingInMemory implements ChunkAssemblyTracker |
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{ |
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private |
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$uuid, |
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$chunks, |
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$nbChunksLeft, |
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$nbChunks; |
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public function __construct() |
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{ |
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$this->uuid = null; |
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$this->chunks = null; |
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$this->nbChunksLeft = 0; |
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$this->nbChunks = 0; |
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} |
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public function start(ChunkedMessageMetadata $metadata) |
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{ |
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if($this->uuid instanceof Uuid) |
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{ |
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if($this->isAllHasBeenReceived($this->uuid) === false) |
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{ |
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throw new \LogicException( |
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"Another tracking is in progress (" . $this->uuid . "), cannot start tracking " . $metadata->uuid() |
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); |
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} |
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} |
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$nbChunks = $metadata->nbChunks(); |
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$this->uuid = $metadata->uuid(); |
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$this->nbChunks = $nbChunks; |
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$this->nbChunksLeft = $nbChunks; |
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$this->chunks = array_fill(0, $nbChunks, false); |
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} |
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public function hasBeenStarted(Uuid $uuid) |
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{ |
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return $this->uuid instanceof Uuid |
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&& $this->uuid->equals($uuid) |
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&& is_array($this->chunks); |
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} |
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private function ensureHasBeenStarted(Uuid $uuid) |
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{ |
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if(! $this->hasBeenStarted($uuid)) |
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{ |
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throw new \LogicException("Chunk assembly tracking has not been initialized ($uuid)"); |
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} |
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} |
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private function convertPlayhead($playhead) |
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{ |
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// 1-based --> 0-based |
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return $playhead - 1; |
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} |
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public function markAsReceived(Uuid $uuid, $playhead) |
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{ |
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$this->ensureHasBeenStarted($uuid); |
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$playhead = $this->convertPlayhead($playhead); |
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if(! array_key_exists($playhead, $this->chunks)) |
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{ |
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throw new \LogicException("Invalid chunk number : $playhead"); |
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} |
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if($this->chunks[$playhead] === false) |
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{ |
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$this->nbChunksLeft--; |
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} |
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$this->chunks[$playhead] = true; |
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} |
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public function isAllHasBeenReceived(Uuid $uuid) |
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{ |
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$this->ensureHasBeenStarted($uuid); |
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return $this->nbChunksLeft === 0; |
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} |
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} |
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puzzle-org /
amqp
