La clase MongoDB\Driver\Command

(mongodb >=1.0.0)

Introducción

La clase MongoDB\Driver\Command es un objeto valor que representa un comando de base de datos.

Para proporcionar asistentes de comandos el objeto MongoDB\Driver\Command debe estar compuesto.

Sinopsis de la Clase

final class MongoDB\Driver\Command {
/* Métodos */
final public __construct(array|object $documento, ?array $opcionesComando = null)
}

Ejemplos

Ejemplo #1 Composición de MongoDB\Driver\Command para proporcionar un asistente para crear colecciones

<?php
class CreateCollection {
protected $cmd = array();

function __construct($collectionName) {
$this->cmd["create"] = (string) $collectionName;
}
function setCappedCollection($maxBytes, $maxDocuments = false) {
$this->cmd["capped"] = true;
$this->cmd["size"] = (int) $maxBytes;

if ($maxDocuments) {
$this->cmd["max"] = (int) $maxDocuments;
}
}
function usePowerOf2Sizes($bool) {
if ($bool) {
$this->cmd["flags"] = 1;
} else {
$this->cmd["flags"] = 0;
}
}
function setFlags($flags) {
$this->cmd["flags"] = (int) $flags;
}
function getCommand() {
return new MongoDB\Driver\Command($this->cmd);
}
function getCollectionName() {
return $this->cmd["create"];
}
}


$manager = new MongoDB\Driver\Manager("mongodb://localhost:27017");

$createCollection = new CreateCollection("cappedCollection");
$createCollection->setCappedCollection(64 * 1024);

try {
$command = $createCollection->getCommand();
$cursor = $manager->executeCommand("databaseName", $command);
$response = $cursor->toArray()[0];
var_dump($response);

$collstats = ["collstats" => $createCollection->getCollectionName()];
$cursor = $manager->executeCommand("databaseName", new MongoDB\Driver\Command($collstats));
$response = $cursor->toArray()[0];
var_dump($response);
} catch(MongoDB\Driver\Exception $e) {
echo $e->getMessage(), "\n";
exit;
}

?>

El ejemplo anterior mostrará:

object(MongoDB\Driver\Command)#3 (1) {
  ["command"]=>
  array(3) {
    ["create"]=>
    string(16) "cappedCollection"
    ["capped"]=>
    bool(true)
    ["size"]=>
    int(65536)
  }
}
array(1) {
  ["ok"]=>
  float(1)
}
array(16) {
  ["ns"]=>
  string(29) "databaseName.cappedCollection"
  ["count"]=>
  int(0)
  ["size"]=>
  int(0)
  ["numExtents"]=>
  int(1)
  ["storageSize"]=>
  int(65536)
  ["nindexes"]=>
  int(1)
  ["lastExtentSize"]=>
  float(65536)
  ["paddingFactor"]=>
  float(1)
  ["paddingFactorNote"]=>
  string(101) "paddingFactor is unused and unmaintained in 2.8. It remains hard coded to 1.0 for compatibility only."
  ["userFlags"]=>
  int(0)
  ["capped"]=>
  bool(true)
  ["max"]=>
  int(9223372036854775807)
  ["maxSize"]=>
  int(65536)
  ["totalIndexSize"]=>
  int(8176)
  ["indexSizes"]=>
  object(stdClass)#4 (1) {
    ["_id_"]=>
    int(8176)
  }
  ["ok"]=>
  float(1)
}

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