Java tutorial
/** * Copyright (c) 2000-present Liferay, Inc. All rights reserved. * * This library is free software; you can redistribute it and/or modify it under * the terms of the GNU Lesser General Public License as published by the Free * Software Foundation; either version 2.1 of the License, or (at your option) * any later version. * * This library is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more * details. */ package com.liferay.subscription.web.internal.portlet.action; import com.liferay.portal.kernel.exception.NoSuchTicketException; import com.liferay.portal.kernel.exception.PortalException; import com.liferay.portal.kernel.language.LanguageUtil; import com.liferay.portal.kernel.log.Log; import com.liferay.portal.kernel.log.LogFactoryUtil; import com.liferay.portal.kernel.model.Group; import com.liferay.portal.kernel.model.Ticket; import com.liferay.portal.kernel.model.User; import com.liferay.portal.kernel.portlet.PortletURLFactoryUtil; import com.liferay.portal.kernel.portlet.bridges.mvc.BaseMVCActionCommand; import com.liferay.portal.kernel.portlet.bridges.mvc.MVCActionCommand; import com.liferay.portal.kernel.security.auth.PrincipalException; import com.liferay.portal.kernel.service.GroupLocalService; import com.liferay.portal.kernel.service.TicketLocalService; import com.liferay.portal.kernel.servlet.SessionErrors; import com.liferay.portal.kernel.util.ParamUtil; import com.liferay.portal.kernel.util.Portal; import com.liferay.portal.kernel.util.ResourceBundleUtil; import com.liferay.subscription.exception.NoSuchSubscriptionException; import com.liferay.subscription.model.Subscription; import com.liferay.subscription.service.SubscriptionLocalService; import com.liferay.subscription.web.internal.constants.SubscriptionConstants; import com.liferay.subscription.web.internal.constants.SubscriptionPortletKeys; import java.util.Locale; import java.util.ResourceBundle; import javax.portlet.ActionRequest; import javax.portlet.ActionResponse; import javax.portlet.PortletRequest; import javax.portlet.PortletURL; import javax.portlet.WindowState; import org.osgi.service.component.annotations.Component; import org.osgi.service.component.annotations.Reference; /** * @author Sergio Gonzlez */ @Component(immediate = true, property = { "javax.portlet.name=" + SubscriptionPortletKeys.UNSUBSCRIBE, "mvc.command.name=/subscription/unsubscribe" }, service = MVCActionCommand.class) public class UnsubscribeMVCActionCommand extends BaseMVCActionCommand { @Override public void doProcessAction(ActionRequest actionRequest, ActionResponse actionResponse) throws Exception { String key = ParamUtil.getString(actionRequest, "key"); long userId = ParamUtil.getLong(actionRequest, "userId"); PortletURL portletURL = PortletURLFactoryUtil.create(actionRequest, SubscriptionPortletKeys.UNSUBSCRIBE, PortletRequest.RENDER_PHASE); portletURL.setWindowState(WindowState.MAXIMIZED); portletURL.setParameter("mvcPath", "/unsubscribe/unsubscribed.jsp"); portletURL.setParameter("key", key); portletURL.setParameter("userId", String.valueOf(userId)); try { _checkUser(userId, actionRequest); Subscription subscription = _unsubscribe(key, userId); portletURL.setParameter("subscriptionTitle", _getTitle(actionRequest.getLocale(), subscription)); actionResponse.sendRedirect(portletURL.toString()); } catch (NoSuchSubscriptionException nsse) { _log.error(nsse); actionResponse.sendRedirect(portletURL.toString()); } catch (PortalException pe) { SessionErrors.add(actionRequest, pe.getClass(), pe); actionResponse.setRenderParameter("mvcPath", "/unsubscribe/error.jsp"); } } private void _checkUser(long userId, ActionRequest actionRequest) throws PortalException { User user = _portal.getUser(actionRequest); if ((user != null) && (userId != user.getUserId())) { throw new PrincipalException(); } } private void _checkUser(long userId, Subscription subscription) throws PrincipalException { if ((subscription != null) && (subscription.getUserId() != userId)) { throw new PrincipalException(); } } private Ticket _getTicket(String key) throws PortalException { Ticket ticket = _ticketLocalService.getTicket(key); if (ticket.getType() != SubscriptionConstants.TICKET_TYPE) { throw new NoSuchTicketException("Invalid type " + ticket.getType()); } String className = ticket.getClassName(); if (!className.equals(Subscription.class.getName())) { throw new NoSuchTicketException("Invalid className " + className); } return ticket; } private String _getTitle(Locale locale, Subscription subscription) throws PortalException { Group group = _groupLocalService.fetchGroup(subscription.getClassPK()); ResourceBundle resourceBundle = ResourceBundleUtil.getBundle("content.Language", locale, getClass()); return LanguageUtil.format(resourceBundle, "blog-at-x", group.getDescriptiveName(locale)); } private Subscription _unsubscribe(String key, long userId) throws PortalException { Ticket ticket = _getTicket(key); long subscriptionId = ticket.getClassPK(); if (ticket.isExpired()) { _ticketLocalService.deleteTicket(ticket); throw new NoSuchTicketException("{ticketKey=" + key + "}"); } Subscription subscription = _subscriptionLocalService.getSubscription(subscriptionId); _checkUser(userId, subscription); _subscriptionLocalService.deleteSubscription(subscription); return subscription; } private static final Log _log = LogFactoryUtil.getLog(UnsubscribeMVCActionCommand.class); @Reference private GroupLocalService _groupLocalService; @Reference private Portal _portal; @Reference private SubscriptionLocalService _subscriptionLocalService; @Reference private TicketLocalService _ticketLocalService; }