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gyro/core/behaviour/base/commandtransactional.cls.php

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<?php
require_once dirname(__FILE__) . '/commandbase.cls.php';
 
/**
 * The Transaction Command starts a database transaction before execution 
 * and commits on success or rollbacks on error.  
 *
 * Overload function do_execute() to implement behaviour. 
 * 
 * @author Gerd Riesselmann
 * @ingroup Behaviour
 */
class CommandTransactional extends CommandBase {
        /**
         * Executes commands
         * 
         * @return Status
         */
        public function execute() {
                $ret = new Status();
                DB::start_trans();
                try { 
                        $ret = $this->do_execute();
                }
                catch (Exception $ex) {
                        $ret->merge($ex);
                }
                if ($ret->is_ok()) {
                        $ret->merge(parent::execute());
                }
                if ($ret->is_error()) {
                        $this->undo();
                }
                DB::end_trans($ret);
                return $ret;
        }
                
        /**
         * Does executing
         *
         * @return Status
         */
        protected function do_execute() {
                return new Status();
        } 
}

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