ZF2 + Doctrine2: Server has gone away - how to jog

Question

Thanks in advance for your help.

I'm wondering if anyone quickly knows what functions to call on the Entity Repository to jog its reconnection if it is dead. I am running some jobs that can take a length of time that exceeds wait_timeout through a ZF2 CLI route, and unfortunately, the ER's connection dies by the time it needs to get used (when the job is done).

Need:

// do the long job

$sl = $this->getServiceLocator();
$mapper = $sl->get( 'doctrine_object_mapper' );
if( !$mapper->getRepository()->isAlive() ) // something like so
    $mapper->getRepository()->wakeTheHellUp();

Aren't those proper method names! ;)

Thanks again.

Answer 1

This is a fairly common problem with long running processes and connections.

The solution is to retrieve the ORM's DBAL connection and re-create it if the connection was lost (ensuring it didn't die during a transaction). This is obviously annoying, but it's the only way of doing it right now:

// note - you need a ServiceManager here, not just a generic service locator
$entityMAnager = $serviceManager->get('entity_manager');
$connection    = $entityManager->getConnection();

try {
    // dummy query
    $connection->query('SELECT 1');
} catch (\Doctrine\DBAL\DBALException $e) {
    if ($connection->getTransactionIsolation()) {
        // failed in the middle of a transaction - this is serious!
        throw $e;
    }

    // force instantiation of a new entity manager
    $entityManager = $serviceManager->create('entity_manager');
}

$this->doFoo($entityManager);