capturing the login event in zendframework 2 - event-handling

Question

I want to capture the loggin event in zendframework2 and then update the database when the user last logged in.
i am aware that if i do the following in the onBootstrap(MVCEvent $e) of my module i will be able to capture the event etc:
$eventManager = $e->getApplication()->getEventManager();
$em = $eventManager->getSharedManager();
$em->attach(
'ZfcUser\Authentication\Adapter\AdapterChain',
'authenticate',
function($e)
{
$id = $e->getIdentity();
}
);
this will give me the Id of the user. however, the confusion is how i can then update my database from the bootstrap. i mean, i dont have access to the entity manager in my bootstrap and i am not sure how to transport it there. the entity manager is held in the service config file.
i.e
getServiceConfig()
'Members\Model\WorkerTable' => function($sm) {
$db = $sm->get('doctrine.entitymanager.orm_default');
$table = new Model\MemberTable($db);
return $table;
},
.
with the above settings i am able to access the entity manager in my MemberTable class
so, a simple solution would be to transfer the loggin event manager to my
** MemberTable class** where i would use my entity manager to update the database.
issue, i am not sure how to set this up:
$eventManager = $e->getApplication()->getEventManager();
$em = $eventManager->getSharedManager();
i mean, i dont know how to get the variable $e into the MemberTable class so that i can access the eventManger and the sharedManager.
in summary; the issues are twofold.
how do i get the entity manager into the bootstrap function
alternatively
how do i get the eventManager and shared eventmanager into a normal class so that i can call the eventmanger in a class that already contains the entity manager

Answer 1

Well, all you have to do is to retrieve the service manager this way:
$serviceManager = $e->getApplication()->getServiceManager();
and then get your entity manager like this:
$entityManager = $serviceManager->get('Members\Model\WorkerTable');
Does it solve your problem?
The answer to the second question
To bring a variable into the closure from outside you can use "use" operator like so:
function() use ($myVar){
// some code
}
So, in your case I would do:
$eventManager = $e->getApplication()->getEventManager();
$em = $eventManager->getSharedManager();
$em->attach(
'ZfcUser\Authentication\Adapter\AdapterChain',
'authenticate',
function($e) use ($entityManager){
$id = $e->getIdentity();
}
);
If you are planning to have a lot of code inside your closure I would suggest to put it into a separate class and make it invokable. For instance,
class YourClosureCode
{
private $entityManager;
public function __construct($eventManager)
{
$this->eventManager = $eventManager;
}
public function __invoke(EventInterface $e)
{
// put your closure code here
}
}
Then a slight modification here:
$eventManager = $e->getApplication()->getEventManager();
$em = $eventManager->getSharedManager();
$em->attach(
'ZfcUser\Authentication\Adapter\AdapterChain',
'authenticate',
new YourClosureCode($entityManager);
);