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<?php
namespace Guzzle\Batch;
use Guzzle\Batch\BatchTransferInterface;
use Guzzle\Batch\BatchDivisorInterface;
use Guzzle\Common\Exception\InvalidArgumentException;
use Guzzle\Service\Command\CommandInterface;
use Guzzle\Service\Exception\InconsistentClientTransferException;
/**
* Efficiently transfers multiple commands in parallel per client
* This class is to be used with {@see Guzzle\Batch\BatchInterface}
*/
class BatchCommandTransfer implements BatchTransferInterface, BatchDivisorInterface
{
/** @var int Size of each command batch */
protected $batchSize;
/**
* @param int $batchSize Size of each batch
*/
public function __construct($batchSize = 50)
{
$this->batchSize = $batchSize;
}
/**
* Creates batches by grouping commands by their associated client
* {@inheritdoc}
*/
public function createBatches(\SplQueue $queue)
{
$groups = new \SplObjectStorage();
foreach ($queue as $item) {
if (!$item instanceof CommandInterface) {
throw new InvalidArgumentException('All items must implement Guzzle\Service\Command\CommandInterface');
}
$client = $item->getClient();
if (!$groups->contains($client)) {
$groups->attach($client, new \ArrayObject(array($item)));
} else {
$groups[$client]->append($item);
}
}
$batches = array();
foreach ($groups as $batch) {
$batches = array_merge($batches, array_chunk($groups[$batch]->getArrayCopy(), $this->batchSize));
}
return $batches;
}
public function transfer(array $batch)
{
if (empty($batch)) {
return;
}
// Get the client of the first found command
$client = reset($batch)->getClient();
// Keep a list of all commands with invalid clients
$invalid = array_filter($batch, function ($command) use ($client) {
return $command->getClient() !== $client;
});
if (!empty($invalid)) {
throw new InconsistentClientTransferException($invalid);
}
$client->execute($batch);
}
}