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<?php namespace Illuminate\Database;
use Illuminate\Database\Connectors\ConnectionFactory;
class DatabaseManager implements ConnectionResolverInterface {
/**
* The application instance.
*
* @var \Illuminate\Foundation\Application
*/
protected $app;
/**
* The database connection factory instance.
*
* @var \Illuminate\Database\Connectors\ConnectionFactory
*/
protected $factory;
/**
* The active connection instances.
*
* @var array
*/
protected $connections = array();
/**
* The custom connection resolvers.
*
* @var array
*/
protected $extensions = array();
/**
* Create a new database manager instance.
*
* @param \Illuminate\Foundation\Application $app
* @param \Illuminate\Database\Connectors\ConnectionFactory $factory
* @return void
*/
public function __construct($app, ConnectionFactory $factory)
{
$this->app = $app;
$this->factory = $factory;
}
/**
* Get a database connection instance.
*
* @param string $name
* @return \Illuminate\Database\Connection
*/
public function connection($name = null)
{
$name = $name ?: $this->getDefaultConnection();
// If we haven't created this connection, we'll create it based on the config
// provided in the application. Once we've created the connections we will
// set the "fetch mode" for PDO which determines the query return types.
if ( ! isset($this->connections[$name]))
{
$connection = $this->makeConnection($name);
$this->connections[$name] = $this->prepare($connection);
}
return $this->connections[$name];
}
/**
* Reconnect to the given database.
*
* @param string $name
* @return \Illuminate\Database\Connection
*/
public function reconnect($name = null)
{
$name = $name ?: $this->getDefaultConnection();
$this->disconnect($name);
return $this->connection($name);
}
/**
* Disconnect from the given database.
*
* @param string $name
* @return void
*/
public function disconnect($name = null)
{
$name = $name ?: $this->getDefaultConnection();
unset($this->connections[$name]);
}
/**
* Make the database connection instance.
*
* @param string $name
* @return \Illuminate\Database\Connection
*/
protected function makeConnection($name)
{
$config = $this->getConfig($name);
// First we will check by the connection name to see if an extension has been
// registered specifically for that connection. If it has we will call the
// Closure and pass it the config allowing it to resolve the connection.
if (isset($this->extensions[$name]))
{
return call_user_func($this->extensions[$name], $config, $name);
}
$driver = $config['driver'];
// Next we will check to see if an extension has been registered for a driver
// and will call the Closure if so, which allows us to have a more generic
// resolver for the drivers themselves which applies to all connections.
if (isset($this->extensions[$driver]))
{
return call_user_func($this->extensions[$driver], $config, $name);
}
return $this->factory->make($config, $name);
}
/**
* Prepare the database connection instance.
*
* @param \Illuminate\Database\Connection $connection
* @return \Illuminate\Database\Connection
*/
protected function prepare(Connection $connection)
{
$connection->setFetchMode($this->app['config']['database.fetch']);
if ($this->app->bound('events'))
{
$connection->setEventDispatcher($this->app['events']);
}
// The database connection can also utilize a cache manager instance when cache
// functionality is used on queries, which provides an expressive interface
// to caching both fluent queries and Eloquent queries that are executed.
$app = $this->app;
$connection->setCacheManager(function() use ($app)
{
return $app['cache'];
});
// We will setup a Closure to resolve the paginator instance on the connection
// since the Paginator isn't used on every request and needs quite a few of
// our dependencies. It'll be more efficient to lazily resolve instances.
$connection->setPaginator(function() use ($app)
{
return $app['paginator'];
});
return $connection;
}
/**
* Get the configuration for a connection.
*
* @param string $name
* @return array
*
* @throws \InvalidArgumentException
*/
protected function getConfig($name)
{
$name = $name ?: $this->getDefaultConnection();
// To get the database connection configuration, we will just pull each of the
// connection configurations and get the configurations for the given name.
// If the configuration doesn't exist, we'll throw an exception and bail.
$connections = $this->app['config']['database.connections'];
if (is_null($config = array_get($connections, $name)))
{
throw new \InvalidArgumentException("Database [$name] not configured.");
}
return $config;
}
/**
* Get the default connection name.
*
* @return string
*/
public function getDefaultConnection()
{
return $this->app['config']['database.default'];
}
/**
* Set the default connection name.
*
* @param string $name
* @return void
*/
public function setDefaultConnection($name)
{
$this->app['config']['database.default'] = $name;
}
/**
* Register an extension connection resolver.
*
* @param string $name
* @param callable $resolver
* @return void
*/
public function extend($name, $resolver)
{
$this->extensions[$name] = $resolver;
}
/**
* Return all of the created connections.
*
* @return array
*/
public function getConnections()
{
return $this->connections;
}
/**
* Dynamically pass methods to the default connection.
*
* @param string $method
* @param array $parameters
* @return mixed
*/
public function __call($method, $parameters)
{
return call_user_func_array(array($this->connection(), $method), $parameters);
}
}
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