/**
* Apply the callback to the contents of the resource iterator
*
* @param int $perBatch The number of records to group per batch transfer
*
* @return int Returns the number of iterated resources
*/
public function apply($perBatch = 50)
{
$this->iterated = $this->batches = $batches = 0;
$that = $this;
$it = $this->iterator;
$callback = $this->callback;
$batch = BatchBuilder::factory()->createBatchesWith(new BatchSizeDivisor($perBatch))->transferWith(new BatchClosureTransfer(function (array $batch) use($that, $callback, &$batches, $it) {
$batches++;
$that->dispatch('iterator_batch.before_batch', array('iterator' => $it, 'batch' => $batch));
call_user_func_array($callback, array($it, $batch));
$that->dispatch('iterator_batch.after_batch', array('iterator' => $it, 'batch' => $batch));
}))->autoFlushAt($perBatch)->build();
$this->dispatch('iterator_batch.created_batch', array('batch' => $batch));
foreach ($this->iterator as $resource) {
$this->iterated++;
$batch->add($resource);
}
$batch->flush();
$this->batches = $batches;
return $this->iterated;
}
/**
* Factory for creating a DeleteObjectsBatch
*
* @param AwsClientInterface $client Client used to transfer requests
* @param string $bucket Bucket that contains the objects to delete
* @param string $mfa MFA token to use with the request
*
* @return self
*/
public static function factory(AwsClientInterface $client, $bucket, $mfa = null)
{
$batch = BatchBuilder::factory()->createBatchesWith(new BatchSizeDivisor(1000))->transferWith(new DeleteObjectsTransfer($client, $bucket, $mfa))->build();
return new self($batch);
}