<?php
namespace Illuminate\Database;
use PDO;
use Illuminate\Support\Arr;
use Illuminate\Support\Str;
use InvalidArgumentException;
use Illuminate\Database\Connectors\ConnectionFactory;
/**
* @mixin \Illuminate\Database\Connection
*/
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 = [];
/**
* The custom connection resolvers.
*
* @var array
*/
protected $extensions = [];
/**
* 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)
{
list($database, $type) = $this->parseConnectionName($name);
$name = $name ?: $database;
// If we haven't created this connection, we'll create it based on the config
// provided in the application. Once we've created the connections we will
// set the "fetch mode" for PDO which determines the query return types.
if (! isset($this->connections[$name])) {
$this->connections[$name] = $this->configure(
$this->makeConnection($database), $type
);
}
return $this->connections[$name];
}
/**
* Parse the connection into an array of the name and read / write type.
*
* @param string $name
* @return array
*/
protected function parseConnectionName($name)
{
$name = $name ?: $this->getDefaultConnection();
return Str::endsWith($name, ['::read', '::write'])
? explode('::', $name, 2) : [$name, null];
}
/**
* Make the database connection instance.
*
* @param string $name
* @return \Illuminate\Database\Connection
*/
protected function makeConnection($name)
{
$config = $this->configuration($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, $name);
}
// Next we will check to see if an extension has been registered for a driver
// and will call the Closure if so, which allows us to have a more generic
// resolver for the drivers themselves which applies to all connections.
if (isset($this->extensions[$driver = $config['driver']])) {
return call_user_func($this->extensions[$driver], $config, $name);
}
return $this->factory->make($config, $name);
}
/**
* Get the configuration for a connection.
*
* @param string $name
* @return array
*
* @throws \InvalidArgumentException
*/
protected function configuration($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 = Arr::get($connections, $name))) {
throw new InvalidArgumentException("Database [{$name}] not configured.");
}
return $config;
}
/**
* Prepare the database connection instance.
*
* @param \Illuminate\Database\Connection $connection
* @param string $type
* @return \Illuminate\Database\Connection
*/
protected function configure(Connection $connection, $type)
{
$connection = $this->setPdoForType($connection, $type);
// First we'll set the fetch mode and a few other dependencies of the database
// connection. This method basically just configures and prepares it to get
// used by the application. Once we're finished we'll return it back out.
if ($this->app->bound('events')) {
$connection->setEventDispatcher($this->app['events']);
}
// Here we'll set a reconnector callback. This reconnector can be any callable
// so we will set a Closure to reconnect from this manager with the name of
// the connection, which will allow us to reconnect from the connections.
$connection->setReconnector(function ($connection) {
$this->reconnect($connection->getName());
});
return $connection;
}
/**
* Prepare the read / write mode for database connection instance.
*
* @param \Illuminate\Database\Connection $connection
* @param string $type
* @return \Illuminate\Database\Connection
*/
protected function setPdoForType(Connection $connection, $type = null)
{
if ($type == 'read') {
$connection->setPdo($connection->getReadPdo());
} elseif ($type == 'write') {
$connection->setReadPdo($connection->getPdo());
}
return $connection;
}
/**
* Disconnect from the given database and remove from local cache.
*
* @param string $name
* @return void
*/
public function purge($name = null)
{
$name = $name ?: $this->getDefaultConnection();
$this->disconnect($name);
unset($this->connections[$name]);
}
/**
* Disconnect from the given database.
*
* @param string $name
* @return void
*/
public function disconnect($name = null)
{
if (isset($this->connections[$name = $name ?: $this->getDefaultConnection()])) {
$this->connections[$name]->disconnect();
}
}
/**
* Reconnect to the given database.
*
* @param string $name
* @return \Illuminate\Database\Connection
*/
public function reconnect($name = null)
{
$this->disconnect($name = $name ?: $this->getDefaultConnection());
if (! isset($this->connections[$name])) {
return $this->connection($name);
}
return $this->refreshPdoConnections($name);
}
/**
* Refresh the PDO connections on a given connection.
*
* @param string $name
* @return \Illuminate\Database\Connection
*/
protected function refreshPdoConnections($name)
{
$fresh = $this->makeConnection($name);
return $this->connections[$name]
->setPdo($fresh->getPdo())
->setReadPdo($fresh->getReadPdo());
}
/**
* 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;
}
/**
* Get all of the support drivers.
*
* @return array
*/
public function supportedDrivers()
{
return ['mysql', 'pgsql', 'sqlite', 'sqlsrv'];
}
/**
* Get all of the drivers that are actually available.
*
* @return array
*/
public function availableDrivers()
{
return array_intersect(
$this->supportedDrivers(),
str_replace('dblib', 'sqlsrv', PDO::getAvailableDrivers())
);
}
/**
* Register an extension connection resolver.
*
* @param string $name
* @param callable $resolver
* @return void
*/
public function extend($name, callable $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 $this->connection()->$method(...$parameters);
}
}