/**
* The CommandPool constructor accepts a hash of configuration options:
*
* - concurrency: (callable|int) Maximum number of commands to execute
* concurrently. Provide a function to resize the pool dynamically. The
* function will be provided the current number of pending requests and
* is expected to return an integer representing the new pool size limit.
* - before: (callable) function to invoke before sending each command. The
* before function accepts the command and the key of the iterator of the
* command. You can mutate the command as needed in the before function
* before sending the command.
* - fulfilled: (callable) Function to invoke when a promise is fulfilled.
* The function is provided the result object, id of the iterator that the
* result came from, and the aggregate promise that can be resolved/rejected
* if you need to short-circuit the pool.
* - rejected: (callable) Function to invoke when a promise is rejected.
* The function is provided an AwsException object, id of the iterator that
* the exception came from, and the aggregate promise that can be
* resolved/rejected if you need to short-circuit the pool.
*
* @param AwsClientInterface $client Client used to execute commands.
* @param array|\Iterator $commands Iterable that yields commands.
* @param array $config Associative array of options.
*/
public function __construct(AwsClientInterface $client, $commands, array $config = [])
{
if (!isset($config['concurrency'])) {
$config['concurrency'] = 25;
}
$before = $this->getBefore($config);
$mapFn = function ($commands) use($client, $before) {
foreach ($commands as $key => $command) {
if (!$command instanceof CommandInterface) {
throw new \InvalidArgumentException('Each value yielded by ' . 'the iterator must be an Aws\\CommandInterface.');
}
if ($before) {
$before($command, $key);
}
(yield $client->executeAsync($command));
}
};
$this->each = new EachPromise($mapFn($commands), $config);
}
private function flushQueue()
{
static $validKeys = ['Key' => true, 'VersionId' => true];
if (count($this->queue) === 0) {
return null;
}
$batch = [];
while ($obj = array_shift($this->queue)) {
$batch[] = array_intersect_key($obj, $validKeys);
}
$command = $this->client->getCommand('DeleteObjects', ['Bucket' => $this->bucket, 'Delete' => ['Objects' => $batch]]);
if ($this->before) {
call_user_func($this->before, $command);
}
return $this->client->executeAsync($command)->then(function ($result) {
if (!empty($result['Errors'])) {
throw new DeleteMultipleObjectsException($result['Deleted'] ?: [], $result['Errors']);
}
return $result;
});
}