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<?php |
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namespace Port\Pdo; |
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use Port\Exception\WriterException; |
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use Port\Writer; |
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use Port\Writer\FlushableWriter; |
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/** |
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* Write data into a specific database table using a PDO instance. |
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* |
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* IMPORTANT: If your PDO instance does not have ERRMODE_EXCEPTION any write failure will be silent or logged to |
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* stderr only. It is strongly recomended you enable Exceptions with: |
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* |
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* $pdo->setAttribute(\PDO::ATTR_ERRMODE, \PDO::ERRMODE_EXCEPTION); |
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* |
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* @author Stefan Warman |
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*/ |
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class PdoWriter implements Writer, FlushableWriter |
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{ |
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/** |
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* @var \PDO |
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*/ |
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protected $pdo; |
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/** |
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* @var string |
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*/ |
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protected $tableName; |
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/** |
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* @var \PDOStatement |
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*/ |
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protected $statement; |
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/** |
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* @var array |
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*/ |
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private $stack; |
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/** |
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* Note if your table name is a reserved word for your target DB you should quote it in the appropriate way e.g. |
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* for MySQL enclose the name in `backticks`. |
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* |
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* @param \PDO $pdo |
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* @param string $tableName |
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*/ |
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public function __construct(\PDO $pdo, $tableName) |
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{ |
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$this->pdo = $pdo; |
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$this->tableName = $tableName; |
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if (\PDO::ERRMODE_EXCEPTION !== $this->pdo->getAttribute(\PDO::ATTR_ERRMODE)) { |
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throw new WriterException('Please set the pdo error mode to PDO::ERRMODE_EXCEPTION'); |
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} |
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} |
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public function prepare() |
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{ |
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$this->stack = []; |
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$this->statement = null; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function writeItem(array $item) |
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{ |
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if (null === $this->statement) { |
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try { |
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$this->statement = $this->pdo->prepare(sprintf( |
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'INSERT INTO %s (%s) VALUES (%s)', |
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$this->tableName, |
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implode(',', array_keys($item)), |
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substr(str_repeat('?,', count($item)), 0, -1) |
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)); |
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} catch (\PDOException $e) { |
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throw new WriterException('Failed to send query', null, $e); |
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} |
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} |
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$this->stack[] = array_values($item); |
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} |
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public function finish() |
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{ |
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$this->flush(); |
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return $this; |
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} |
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public function flush() |
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{ |
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$this->pdo->beginTransaction(); |
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try { |
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foreach ($this->stack as $data) { |
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$this->statement->execute($data); |
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} |
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$this->stack = []; |
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$this->pdo->commit(); |
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} catch (\PDOException $e) { |
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$this->pdo->rollBack(); |
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throw new WriterException('Failed to write to database', null, $e); |
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} |
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} |
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} |
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portphp /
pdo
