427 lines
14 KiB
PHP
427 lines
14 KiB
PHP
<?php
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/*
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* $Id$
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* This software consists of voluntary contributions made by many individuals
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* and is licensed under the LGPL. For more information, see
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* <http://www.phpdoctrine.com>.
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*/
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/**
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*
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* Doctrine_Manager is the base component of all doctrine based projects.
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* It opens and keeps track of all connections (database connections).
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*
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* @package Doctrine
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* @license http://www.opensource.org/licenses/lgpl-license.php LGPL
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* @category Object Relational Mapping
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* @link www.phpdoctrine.com
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* @since 1.0
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* @version $Revision$
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* @author Konsta Vesterinen <kvesteri@cc.hut.fi>
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*/
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class Doctrine_Manager extends Doctrine_Configurable implements Countable, IteratorAggregate
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{
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/**
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* @var array $connections an array containing all the opened connections
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*/
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private $connections = array();
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/**
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* @var array $bound an array containing all components that have a bound connection
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*/
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private $bound = array();
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/**
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* @var integer $index the incremented index
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*/
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private $index = 0;
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/**
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* @var integer $currIndex the current connection index
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*/
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private $currIndex = 0;
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/**
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* @var string $root root directory
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*/
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private $root;
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/**
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* @var Doctrine_Null $null Doctrine_Null object, used for extremely fast null value checking
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*/
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private $null;
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/**
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* @var array $driverMap
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*/
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private $driverMap = array('oracle' => 'oci8',
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'postgres' => 'pgsql',
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'oci' => 'oci8',
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'sqlite2' => 'sqlite',
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'sqlite3' => 'sqlite');
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/**
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* constructor
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*
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* this is private constructor (use getInstance to get an instance of this class)
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*/
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private function __construct()
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{
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$this->root = dirname(__FILE__);
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$this->null = new Doctrine_Null;
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Doctrine_Record::initNullObject($this->null);
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Doctrine_Collection::initNullObject($this->null);
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Doctrine_Record_Iterator::initNullObject($this->null);
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Doctrine_Validator::initNullObject($this->null);
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}
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/**
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* @return Doctrine_Null
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*/
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final public function getNullObject()
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{
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return $this->null;
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}
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/**
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* setDefaultAttributes
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* sets default attributes
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*
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* @return boolean
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*/
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final public function setDefaultAttributes()
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{
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static $init = false;
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if ( ! $init) {
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$init = true;
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$attributes = array(
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Doctrine::ATTR_FETCHMODE => Doctrine::FETCH_IMMEDIATE,
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Doctrine::ATTR_BATCH_SIZE => 5,
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Doctrine::ATTR_COLL_LIMIT => 5,
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Doctrine::ATTR_LISTENER => new Doctrine_EventListener(),
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Doctrine::ATTR_LOCKMODE => 1,
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Doctrine::ATTR_VLD => false,
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Doctrine::ATTR_AUTO_LENGTH_VLD => true,
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Doctrine::ATTR_AUTO_TYPE_VLD => true,
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Doctrine::ATTR_CREATE_TABLES => true,
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Doctrine::ATTR_QUERY_LIMIT => Doctrine::LIMIT_RECORDS,
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Doctrine::ATTR_IDXNAME_FORMAT => "%s_idx",
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Doctrine::ATTR_SEQNAME_FORMAT => "%s_seq",
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Doctrine::ATTR_QUOTE_IDENTIFIER => false,
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Doctrine::ATTR_SEQCOL_NAME => 'id',
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Doctrine::ATTR_PORTABILITY => Doctrine::PORTABILITY_ALL,
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);
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foreach ($attributes as $attribute => $value) {
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$old = $this->getAttribute($attribute);
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if ($old === null) {
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$this->setAttribute($attribute,$value);
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}
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}
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return true;
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}
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return false;
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}
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/**
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* returns the root directory of Doctrine
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*
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* @return string
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*/
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final public function getRoot()
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{
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return $this->root;
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}
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/**
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* getInstance
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* returns an instance of this class
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* (this class uses the singleton pattern)
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*
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* @return Doctrine_Manager
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*/
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public static function getInstance()
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{
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static $instance;
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if ( ! isset($instance)) {
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$instance = new self();
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}
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return $instance;
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}
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/**
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* connection
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*
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* if the adapter parameter is set this method acts as
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* a short cut for Doctrine_Manager::getInstance()->openConnection($adapter, $name);
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*
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* if the adapter paramater is not set this method acts as
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* a short cut for Doctrine_Manager::getInstance()->getCurrentConnection()
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*
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* @param PDO|Doctrine_Adapter_Interface $adapter database driver
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* @param string $name name of the connection, if empty numeric key is used
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* @throws Doctrine_Manager_Exception if trying to bind a connection with an existing name
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* @return Doctrine_Connection
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*/
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public static function connection($adapter = null, $name = null)
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{
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if ($adapter == null) {
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return Doctrine_Manager::getInstance()->getCurrentConnection();
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} else {
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return Doctrine_Manager::getInstance()->openConnection($adapter, $name);
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}
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}
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/**
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* openConnection
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* opens a new connection and saves it to Doctrine_Manager->connections
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*
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* @param PDO|Doctrine_Adapter_Interface $adapter database driver
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* @param string $name name of the connection, if empty numeric key is used
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* @throws Doctrine_Manager_Exception if trying to bind a connection with an existing name
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* @throws Doctrine_Manager_Exception if trying to open connection for unknown driver
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* @return Doctrine_Connection
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*/
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public function openConnection($adapter, $name = null, $setCurrent = true)
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{
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if ( ! ($adapter instanceof PDO) && ! in_array('Doctrine_Adapter_Interface', class_implements($adapter))) {
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throw new Doctrine_Manager_Exception("First argument should be an instance of PDO or implement Doctrine_Adapter_Interface");
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}
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if ($adapter instanceof Doctrine_Db) {
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$adapter->setName($name);
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}
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// initialize the default attributes
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$this->setDefaultAttributes();
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if ($name !== null) {
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$name = (string) $name;
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if (isset($this->connections[$name])) {
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return $this->connections[$name];
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}
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} else {
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$name = $this->index;
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$this->index++;
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}
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switch ($adapter->getAttribute(Doctrine::ATTR_DRIVER_NAME)) {
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case 'mysql':
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$this->connections[$name] = new Doctrine_Connection_Mysql($this, $adapter);
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break;
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case 'sqlite':
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$this->connections[$name] = new Doctrine_Connection_Sqlite($this, $adapter);
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break;
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case 'pgsql':
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$this->connections[$name] = new Doctrine_Connection_Pgsql($this, $adapter);
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break;
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case 'oci':
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case 'oracle':
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$this->connections[$name] = new Doctrine_Connection_Oracle($this, $adapter);
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break;
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case 'mssql':
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case 'dblib':
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$this->connections[$name] = new Doctrine_Connection_Mssql($this, $adapter);
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break;
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case 'firebird':
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$this->connections[$name] = new Doctrine_Connection_Firebird($this, $adapter);
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break;
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case 'informix':
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$this->connections[$name] = new Doctrine_Connection_Informix($this, $adapter);
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break;
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case 'mock':
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$this->connections[$name] = new Doctrine_Connection_Mock($this, $adapter);
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break;
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default:
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throw new Doctrine_Manager_Exception('Unknown connection driver '. $adapter->getAttribute(Doctrine::ATTR_DRIVER_NAME));
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};
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if ($setCurrent) {
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$this->currIndex = $name;
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}
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return $this->connections[$name];
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}
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/**
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* getConnection
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* @param integer $index
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* @return object Doctrine_Connection
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* @throws Doctrine_Manager_Exception if trying to get a non-existent connection
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*/
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public function getConnection($name)
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{
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if ( ! isset($this->connections[$name])) {
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throw new Doctrine_Manager_Exception('Unknown connection: ' . $name);
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}
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return $this->connections[$name];
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}
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/**
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* getComponentAlias
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* retrieves the alias for given component name
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* if the alias couldn't be found, this method returns the given
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* component name
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*
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* @param string $componentName
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* @return string the component alias
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*/
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public function getComponentAlias($componentName)
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{
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if (isset($this->componentAliases[$componentName])) {
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return $this->componentAliases[$componentName];
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}
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return $componentName;
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}
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/**
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* sets an alias for given component name
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* very useful when building a large framework with a possibility
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* to override any given class
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*
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* @param string $componentName the name of the component
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* @param string $alias
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* @return Doctrine_Manager
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*/
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public function setComponentAlias($componentName, $alias)
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{
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$this->componentAliases[$componentName] = $alias;
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return $this;
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}
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/**
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* bindComponent
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* binds given component to given connection
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* this means that when ever the given component uses a connection
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* it will be using the bound connection instead of the current connection
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*
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* @param string $componentName
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* @param string $connectionName
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* @return boolean
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*/
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public function bindComponent($componentName, $connectionName)
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{
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$this->bound[$componentName] = $connectionName;
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}
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/**
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* getConnectionForComponent
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*
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* @param string $componentName
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* @return Doctrine_Connection
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*/
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public function getConnectionForComponent($componentName = null)
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{
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if (isset($this->bound[$componentName])) {
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return $this->getConnection($this->bound[$componentName]);
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}
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return $this->getCurrentConnection();
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}
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/**
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* getTable
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* this is the same as Doctrine_Connection::getTable() except
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* that it works seamlessly in multi-server/connection environment
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*
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* @see Doctrine_Connection::getTable()
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* @param string $componentName
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* @return Doctrine_Table
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*/
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public function getTable($componentName)
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{
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return $this->getConnectionForComponent($componentName)->getTable($componentName);
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}
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/**
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* closes the connection
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*
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* @param Doctrine_Connection $connection
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* @return void
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*/
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public function closeConnection(Doctrine_Connection $connection)
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{
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$connection->close();
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unset($connection);
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}
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/**
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* getConnections
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* returns all opened connections
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*
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* @return array
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*/
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public function getConnections()
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{
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return $this->connections;
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}
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/**
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* setCurrentConnection
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* sets the current connection to $key
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*
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* @param mixed $key the connection key
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* @throws InvalidKeyException
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* @return void
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*/
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public function setCurrentConnection($key)
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{
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$key = (string) $key;
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if ( ! isset($this->connections[$key])) {
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throw new InvalidKeyException();
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}
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$this->currIndex = $key;
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}
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/**
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* contains
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* whether or not the manager contains specified connection
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*
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* @param mixed $key the connection key
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* @return boolean
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*/
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public function contains($key)
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{
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return isset($this->connections[$key]);
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}
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/**
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* count
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* returns the number of opened connections
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*
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* @return integer
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*/
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public function count()
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{
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return count($this->connections);
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}
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/**
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* getIterator
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* returns an ArrayIterator that iterates through all connections
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*
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* @return ArrayIterator
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*/
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public function getIterator()
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{
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return new ArrayIterator($this->connections);
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}
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/**
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* getCurrentConnection
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* returns the current connection
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*
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* @throws Doctrine_Connection_Exception if there are no open connections
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* @return Doctrine_Connection
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*/
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public function getCurrentConnection()
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{
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$i = $this->currIndex;
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if ( ! isset($this->connections[$i])) {
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throw new Doctrine_Connection_Exception();
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}
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return $this->connections[$i];
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}
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/**
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* __toString
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* returns a string representation of this object
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*
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* @return string
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*/
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public function __toString()
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{
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$r[] = "<pre>";
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$r[] = "Doctrine_Manager";
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$r[] = "Connections : ".count($this->connections);
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$r[] = "</pre>";
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return implode("\n",$r);
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}
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}
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