testing

AphrontDatabaseTransactionState.php
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			<?php

			/*
			* Copyright 2012 Facebook, Inc.
			*
			* Licensed under the Apache License, Version 2.0 (the "License");
			* you may not use this file except in compliance with the License.
			* You may obtain a copy of the License at
			*
			* http://www.apache.org/licenses/LICENSE-2.0
			*
			* Unless required by applicable law or agreed to in writing, software
			* distributed under the License is distributed on an "AS IS" BASIS,
			* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
			* See the License for the specific language governing permissions and
			* limitations under the License.
			*/

			/**
			* Represents current transaction state of a connection.
			*
			* @group storage
			*/
			final class AphrontDatabaseTransactionState {

			private $depth;

			public function getDepth() {
			return $this->depth;
			}

			public function increaseDepth() {
			return ++$this->depth;
			}

			public function decreaseDepth() {
			if ($this->depth == 0) {
			throw new Exception(
			'Too many calls to saveTransaction() or killTransaction()!');
			}

			return --$this->depth;
			}

			public function getSavepointName() {
			return 'Aphront_Savepoint_'.$this->depth;
			}

			public function __destruct() {
			if ($this->depth) {
			throw new Exception(
			'Process exited with an open transaction! The transaction will be '.
			'implicitly rolled back. Calls to openTransaction() must always be '.
			'paired with a call to saveTransaction() or killTransaction().');
			}
			}

			}