Use a Service Locator: You need to create an Action Helper and inject the EntityManager in it when you register it in the Front Controller. This Action Helper receives as parameter in the direct() method the name of the class of service. Inside this method you should try to instantiate the class of service requested, and return it (or throw an exception if the same is not found).
Let your service classes receive as parameter in the constructor the EntityManager. The rest should already be clear to you. In your controller you only need to use something like: SomeController extends Zend_Controller_Action { //... public function someAction () { $MyService = $this->_helper->myServiveLocator('MyService'); //... } }.
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