Transaction Management by Model for CakePHP

DBMainTransactionManager.php

<?php
App::uses('TransactionManager', 'Model');

class DBMainTransactionManager extends TransactionManager {

	public $name = 'DBMainTransactionManager';
	
	public function __construct($id = false, $table = null, $ds = null) {
		parent::__construct();
		$this->useDbConfig = Configure::read('Datasource.mysql.master.main');
	}
}

TransactionManager.php

<?php
App::uses('AppModel', 'Model');

abstract class TransactionManager extends AppModel {

  public $name = 'TransactionManager';
	public $useTable = false;
	
	public function begin() {
		$ret = $this->getDataSource()->begin();
		if ($ret === false) {
			throw new TransactionException(
				'Transaction can not be begun.',
				0x00);
		}
	}
	
	public function commit() {
		$ret = $this->getDataSource()->commit();
		if ($ret === false) {
			throw new TransactionException(
				'Transaction could not be committed.',
				0x00);
		}
	}
	
	public function rollback() {
		$this->getDataSource()->rollback();
	}
}