AppserverIo\Appserver\PersistenceContainer\BeanManager::invoke PHP Method

    public function invoke(RemoteMethodInterface $remoteMethod, CollectionInterface $sessions)
    {
        // prepare method name and parameters and invoke method
        $className = $remoteMethod->getClassName();
        $methodName = $remoteMethod->getMethodName();
        $parameters = $remoteMethod->getParameters();
        $sessionId = $remoteMethod->getSessionId();
        // load the application instance
        $application = $this->getApplication();
        // try to load the session with the ID passed in the remote method
        $session = CollectionUtils::find($sessions, new FilterSessionPredicate($sessionId));
        // query whether the session is available or not
        if ($session instanceof CollectionInterface) {
            // query whether we already have an instance in the session container
            if ($instance = $session->exists($className)) {
                $instance = $session->get($className);
            }
        }
        // load a fresh bean instance and add it to the session container
        if ($instance == null) {
            $instance = $application->search($className, array($sessionId, array($application)));
        }
        // query whether we already have an instance in the session container
        if ($session instanceof CollectionInterface) {
            $session->add($className, $instance);
        }
        // invoke the remote method call on the local instance
        $response = call_user_func_array(array($instance, $methodName), $parameters);
        // load the object manager
        $objectManager = $application->search(ObjectManagerInterface::IDENTIFIER);
        // load the bean descriptor
        $descriptor = $objectManager->getObjectDescriptors()->get(get_class($instance));
        // initialize the flag to mark the instance to be re-attached
        $attach = true;
        // query if we've stateful session bean
        if ($descriptor instanceof StatefulSessionBeanDescriptorInterface) {
            // remove the SFSB instance if a remove method has been called
            if ($descriptor->isRemoveMethod($methodName)) {
                $this->removeStatefulSessionBean($sessionId, $descriptor->getClassName());
                $attach = false;
                // query whether the session is available or not
                if ($session instanceof CollectionInterface) {
                    $session->remove($className);
                }
            }
        }
        // re-attach the bean instance if necessary
        if ($attach === true) {
            $this->attach($instance, $sessionId);
        }
        // return the remote method call result
        return $response;
    }