Zf2 MasterSlaveFeature different Slaves - zend-framework2

Question

is it possible to use different Slave-Connections by using the MasterSlaveFeature in a TableGateway?
I successfully managed to implement the MasterSlaveFeature with one Slave.

Answer 1

I think it is not possible. If you look at the MasterSlaveFeature code you see there is only one $slaveAdapter possible.
If you would like to have a "MultipleMasterSlaveFeature", I guess you have to write it by your own.
You should have a good strategy in mind to select one of your slave adapters, e.g. random select, time dependend or another strategy...
Such class could look like the following code...
class MultipleMasterSlaveFeature extends AbstractFeature {
// Array with AdapterInterface objects
protected $slaveAdpters = null;
//
protected $masterSql = null;
//
protected $slaveSql = null;
/**
*
* #param array $slaveAdapters
* #param Sql $slaveSql
*/
public __construct(array $slaveAdapters, $slaveSql = null)
{
$this->slaveAdapters = $slaveAdapters;
if ($slaveSql) {
$this->slaveSql = $slaveSql;
}
}
// ...
/**
* after initialization, retrieve the original adapter as "master"
*/
public function postInitialize()
{
// Select one of the specified slave adapters
// .. depending on timestamp
$selectedSlaveAdapter = (count($this->slaveAdapters) == 0) ? null : $this->slaveAdapters[time() % count($this->slaveAdapters)];
// ..from MasterSlaveFeature class
$this->masterSql = $this->tableGateway->sql;
if ($this->slaveSql == null) {
$this->slaveSql = new Sql(
$selectedSlaveAdapter,
$this->tableGateway->sql->getTable(),
$this->tableGateway->sql->getSqlPlatform()
);
}
}
// .. preSelect() and postSelect() from MasterSlaveFeature class
}