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<?php |
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namespace suda\orm; |
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use function in_array; |
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use suda\orm\connection\Connection; |
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use suda\orm\exception\SQLException; |
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use suda\orm\connection\MySQLConnection; |
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use suda\orm\connection\SQLiteConnection; |
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class DataSource |
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{ |
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/** |
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* 读连接 |
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* |
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* @var Connection[] |
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*/ |
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protected $write = []; |
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/** |
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* 写连接 |
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* |
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* @var Connection[] |
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*/ |
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protected $read = []; |
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/** |
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* 当前写数据库 |
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* |
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* @var Connection|null |
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*/ |
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protected $master; |
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/** |
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* 当前读数据库 |
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* |
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* @var Connection|null |
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*/ |
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protected $slave; |
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protected static $type = [ |
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'mysql' => MySQLConnection::class, |
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'sqlite' => SQLiteConnection::class, |
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]; |
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/** |
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* 添加连接 |
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* |
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* @param Connection $connection |
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* @return $this |
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*/ |
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public function add(Connection $connection) |
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{ |
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$this->addRead($connection); |
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$this->addWrite($connection); |
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return $this; |
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} |
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/** |
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* 添加读连接 |
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* |
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* @param Connection $connection |
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* @return $this |
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*/ |
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public function addRead(Connection $connection) |
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{ |
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if (!in_array($connection, $this->read)) { |
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$this->read[] = $connection; |
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} |
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return $this; |
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} |
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/** |
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* 添加写连接 |
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* |
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* @param Connection $connection |
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* @return $this |
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*/ |
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public function addWrite(Connection $connection) |
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{ |
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if (!in_array($connection, $this->write)) { |
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$this->write[] = $connection; |
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} |
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return $this; |
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} |
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/** |
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* 获取写连接 |
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* |
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* @return Connection |
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*/ |
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public function read(): Connection |
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{ |
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$this->selectReadConnection(); |
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return $this->slave; |
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} |
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/** |
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* 获取读连接 |
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* |
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* @return Connection |
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*/ |
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public function write(): Connection |
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{ |
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$this->selectWriteConnection(); |
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return $this->master; |
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} |
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/** |
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* 创建连接 |
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* |
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* @param string $type |
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* @param array $config |
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* @param string|null $name |
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* @return Connection |
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* @throws SQLException |
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*/ |
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public static function new(string $type, array $config, ?string $name = null): Connection |
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{ |
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if (array_key_exists($type, static::$type)) { |
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return new static::$type[$type]($config, $name); |
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} else { |
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throw new SQLException(sprintf('no connection type of %s', $type)); |
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} |
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} |
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/** |
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* 读数据库选择 |
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* |
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* @return void |
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*/ |
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protected function selectReadConnection() |
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{ |
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$postion = mt_rand(0, count($this->read) - 1); |
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$this->slave = $this->read[$postion]; |
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} |
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/** |
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* 写数据库选择 |
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* |
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* @return void |
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*/ |
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protected function selectWriteConnection() |
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{ |
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if ($this->master === null) { |
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$position = mt_rand(0, count($this->write) - 1); |
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$this->master = $this->write[$position]; |
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} |
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} |
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} |
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dxkite /
suda
