* @see org.apache.cocoon.portal.coplet.adapter.impl.AbstractCopletAdapter#login(org.apache.cocoon.portal.coplet.CopletInstanceData)
     */
    public void login(CopletInstanceData coplet) {
        super.login(coplet);
        final CopletData copletData = coplet.getCopletData();
        // get the producer
        final String producerId = (String) copletData.getAttribute("producer-id");
        if ( producerId == null ) {
            // if the producer can't be found, we simply return
            this.getLogger().error("Producer not configured in wsrp coplet " + copletData.getId());
            return;            
        }
        final Producer producer = consumerEnvironment.getProducerRegistry().getProducer(producerId);
        if ( producer == null ) {
            // if the producer can't be found, we simply return
            this.getLogger().error("Producer with id " + producerId + " not found.");
            return;
        }
        // get the wsrp user and store it as an attribute on the instance
        final String currentUserID = this.service.getComponentManager().getProfileManager().getUser().getUserName();       
        User user = this.consumerEnvironment.getUserRegistry().getUser(currentUserID);
        if ( user == null ) {
            // create a new user
            user = new UserImpl(currentUserID);
            user.setUserContext(this.userContextProvider.createUserContext(currentUserID));
            this.consumerEnvironment.getUserRegistry().addUser(user);
        }
        coplet.setTemporaryAttribute(ATTRIBUTE_NAME_USER, user);
        // get the portlet handle
        final String portletHandle = (String) copletData.getAttribute("portlet-handle");
        if ( portletHandle == null ) {
            // if the portlet handle can't be found, we simply return
            this.getLogger().error("Portlet handle not configured in wsrp coplet " + copletData.getId());
            return;            
        }
        // get the wsrp portlet
        final PortletKey portletKey = new PortletKeyImpl(portletHandle, producerId);