--- /dev/null
+<?php
+/*
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * This software consists of voluntary contributions made by many individuals
+ * and is licensed under the MIT license. For more information, see
+ * <http://www.doctrine-project.org>.
+ */
+
+namespace Doctrine\DBAL\Connections;
+
+
+use Doctrine\DBAL\Connection,
+ Doctrine\DBAL\Driver,
+ Doctrine\DBAL\Configuration,
+ Doctrine\Common\EventManager,
+ Doctrine\DBAL\Event\ConnectionEventArgs,
+ Doctrine\DBAL\Events;
+
+/**
+ * Master-Slave Connection
+ *
+ * Connection can be used with master-slave setups.
+ *
+ * Important for the understanding of this connection should be how and when
+ * it picks the slave or master.
+ *
+ * 1. Slave if master was never picked before and ONLY if 'getWrappedConnection'
+ * or 'executeQuery' is used.
+ * 2. Master picked when 'exec', 'executeUpdate', 'insert', 'delete', 'update', 'createSavepoint',
+ * 'releaseSavepoint', 'beginTransaction', 'rollback', 'commit', 'query' or
+ * 'prepare' is called.
+ * 3. If master was picked once during the lifetime of the connection it will always get picked afterwards.
+ * 4. One slave connection is randomly picked ONCE during a request.
+ *
+ * ATTENTION: You can write to the slave with this connection if you execute a write query without
+ * opening up a transaction. For example:
+ *
+ * $conn = DriverManager::getConnection(...);
+ * $conn->executeQuery("DELETE FROM table");
+ *
+ * Be aware that Connection#executeQuery is a method specifically for READ
+ * operations only.
+ *
+ * This connection is limited to slave operations using the
+ * Connection#executeQuery operation only, because it wouldn't be compatible
+ * with the ORM or SchemaManager code otherwise. Both use all the other
+ * operations in a context where writes could happen to a slave, which makes
+ * this restricted approach necessary.
+ *
+ * You can manually connect to the master at any time by calling:
+ *
+ * $conn->connect('master');
+ *
+ * Instantiation through the DriverManager looks like:
+ *
+ * @example
+ *
+ * $conn = DriverManager::getConnection(array(
+ * 'wrapperClass' => 'Doctrine\DBAL\Connections\MasterSlaveConnection',
+ * 'driver' => 'pdo_mysql',
+ * 'master' => array('user' => '', 'password' => '', 'host' => '', 'dbname' => ''),
+ * 'slaves' => array(
+ * array('user' => 'slave1', 'password', 'host' => '', 'dbname' => ''),
+ * array('user' => 'slave2', 'password', 'host' => '', 'dbname' => ''),
+ * )
+ * ));
+ *
+ * You can also pass 'driverOptions' and any other documented option to each of this drivers to pass additional information.
+ *
+ * @author Lars Strojny <lstrojny@php.net>
+ * @author Benjamin Eberlei <kontakt@beberlei.de>
+ */
+class MasterSlaveConnection extends Connection
+{
+ /**
+ * Master and slave connection (one of the randomly picked slaves)
+ *
+ * @var Doctrine\DBAL\Driver\Connection[]
+ */
+ protected $connections = array('master' => null, 'slave' => null);
+
+ /**
+ * You can keep the slave connection and then switch back to it
+ * during the request if you know what you are doing.
+ *
+ * @var bool
+ */
+ protected $keepSlave = false;
+
+ /**
+ * Create Master Slave Connection
+ *
+ * @param array $params
+ * @param Driver $driver
+ * @param Configuration $config
+ * @param EventManager $eventManager
+ */
+ public function __construct(array $params, Driver $driver, Configuration $config = null, EventManager $eventManager = null)
+ {
+ if ( !isset($params['slaves']) || !isset($params['master']) ) {
+ throw new \InvalidArgumentException('master or slaves configuration missing');
+ }
+ if ( count($params['slaves']) == 0 ) {
+ throw new \InvalidArgumentException('You have to configure at least one slaves.');
+ }
+
+ $params['master']['driver'] = $params['driver'];
+ foreach ($params['slaves'] as $slaveKey => $slave) {
+ $params['slaves'][$slaveKey]['driver'] = $params['driver'];
+ }
+
+ $this->keepSlave = isset($params['keepSlave']) ? (bool)$params['keepSlave'] : false;
+
+ parent::__construct($params, $driver, $config, $eventManager);
+ }
+
+ /**
+ * Check if the connection is currently towards the master or not.
+ *
+ * @return bool
+ */
+ public function isConnectedToMaster()
+ {
+ return $this->_conn !== null && $this->_conn === $this->connections['master'];
+ }
+
+ /**
+ * {@inheritDoc}
+ */
+ public function connect($connectionName = null)
+ {
+ $requestedConnectionChange = ($connectionName !== null);
+ $connectionName = $connectionName ?: 'slave';
+
+ if ( $connectionName !== 'slave' && $connectionName !== 'master' ) {
+ throw new \InvalidArgumentException("Invalid option to connect(), only master or slave allowed.");
+ }
+
+ // If we have a connection open, and this is not an explicit connection
+ // change request, then abort right here, because we are already done.
+ // This prevents writes to the slave in case of "keepSlave" option enabled.
+ if ($this->_conn && !$requestedConnectionChange) {
+ return false;
+ }
+
+ $forceMasterAsSlave = false;
+
+ if ($this->getTransactionNestingLevel() > 0) {
+ $connectionName = 'master';
+ $forceMasterAsSlave = true;
+ }
+
+ if ($this->connections[$connectionName]) {
+ if ($forceMasterAsSlave) {
+ $this->connections['slave'] = $this->_conn = $this->connections['master'];
+ } else {
+ $this->_conn = $this->connections[$connectionName];
+ }
+ return false;
+ }
+
+ if ($connectionName === 'master') {
+ // Set slave connection to master to avoid invalid reads
+ if ($this->connections['slave'] && ! $this->keepSlave) {
+ unset($this->connections['slave']);
+ }
+
+ $this->connections['master'] = $this->_conn = $this->connectTo($connectionName);
+
+ if ( ! $this->keepSlave) {
+ $this->connections['slave'] = $this->connections['master'];
+ }
+ } else {
+ $this->connections['slave'] = $this->_conn = $this->connectTo($connectionName);
+ }
+
+ if ($this->_eventManager->hasListeners(Events::postConnect)) {
+ $eventArgs = new ConnectionEventArgs($this);
+ $this->_eventManager->dispatchEvent(Events::postConnect, $eventArgs);
+ }
+
+ return true;
+ }
+
+ /**
+ * Connect to a specific connection
+ *
+ * @param string $connectionName
+ * @return Driver
+ */
+ protected function connectTo($connectionName)
+ {
+ $params = $this->getParams();
+
+ $driverOptions = isset($params['driverOptions']) ? $params['driverOptions'] : array();
+
+ $connectionParams = $this->chooseConnectionConfiguration($connectionName, $params);
+
+ $user = isset($connectionParams['user']) ? $connectionParams['user'] : null;
+ $password = isset($connectionParams['password']) ? $connectionParams['password'] : null;
+
+ return $this->_driver->connect($connectionParams, $user, $password, $driverOptions);
+ }
+
+ protected function chooseConnectionConfiguration($connectionName, $params)
+ {
+ if ($connectionName === 'master') {
+ return $params['master'];
+ }
+
+ return $params['slaves'][array_rand($params['slaves'])];
+ }
+
+ /**
+ * {@inheritDoc}
+ */
+ public function executeUpdate($query, array $params = array(), array $types = array())
+ {
+ $this->connect('master');
+ return parent::executeUpdate($query, $params, $types);
+ }
+
+ /**
+ * {@inheritDoc}
+ */
+ public function beginTransaction()
+ {
+ $this->connect('master');
+ return parent::beginTransaction();
+ }
+
+ /**
+ * {@inheritDoc}
+ */
+ public function commit()
+ {
+ $this->connect('master');
+ return parent::commit();
+ }
+
+ /**
+ * {@inheritDoc}
+ */
+ public function rollBack()
+ {
+ $this->connect('master');
+ return parent::rollBack();
+ }
+
+ /**
+ * {@inheritDoc}
+ */
+ public function delete($tableName, array $identifier)
+ {
+ $this->connect('master');
+ return parent::delete($tableName, $identifier);
+ }
+
+ /**
+ * {@inheritDoc}
+ */
+ public function update($tableName, array $data, array $identifier, array $types = array())
+ {
+ $this->connect('master');
+ return parent::update($tableName, $data, $identifier, $types);
+ }
+
+ /**
+ * {@inheritDoc}
+ */
+ public function insert($tableName, array $data, array $types = array())
+ {
+ $this->connect('master');
+ return parent::insert($tableName, $data, $types);
+ }
+
+ /**
+ * {@inheritDoc}
+ */
+ public function exec($statement)
+ {
+ $this->connect('master');
+ return parent::exec($statement);
+ }
+
+ /**
+ * {@inheritDoc}
+ */
+ public function createSavepoint($savepoint)
+ {
+ $this->connect('master');
+
+ return parent::createSavepoint($savepoint);
+ }
+
+ /**
+ * {@inheritDoc}
+ */
+ public function releaseSavepoint($savepoint)
+ {
+ $this->connect('master');
+
+ return parent::releaseSavepoint($savepoint);
+ }
+
+ /**
+ * {@inheritDoc}
+ */
+ public function rollbackSavepoint($savepoint)
+ {
+ $this->connect('master');
+
+ return parent::rollbackSavepoint($savepoint);
+ }
+
+ public function query()
+ {
+ $this->connect('master');
+
+ $args = func_get_args();
+
+ $logger = $this->getConfiguration()->getSQLLogger();
+ if ($logger) {
+ $logger->startQuery($args[0]);
+ }
+
+ $statement = call_user_func_array(array($this->_conn, 'query'), $args);
+
+ if ($logger) {
+ $logger->stopQuery();
+ }
+
+ return $statement;
+ }
+
+ public function prepare($statement)
+ {
+ $this->connect('master');
+
+ return parent::prepare($statement);
+ }
+}
projects / zf2.biz / application_blanche.git / blobdiff