MongoDB\Driver\Command 클래스

(mongodb >=1.0.0)

소개

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MongoDB\Driver\Command 클래스는 데이터베이스 명령을 나타내는 값 개체입니다.

명령 도우미를 제공하려면 MongoDB\Driver\Command 개체를 구성해야 합니다.

클래스 개요

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final class MongoDB\Driver\Command {
  /* Methods */
  final public __construct(array|object $document, array $commandOptions = ?)
}
                

Examples

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예제 #1 MongoDB\Driver\Command를 작성하여 컬렉션 생성 도우미 제공

                  
<?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;
}

?>
                  
                

위의 예는 다음과 유사한 결과를 출력합니다.

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)
}
                

목차

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• MongoDB\Driver\Command::__construct — 새 명령 만들기