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.social.activities.web.internal.portlet.action; import com.liferay.petra.string.StringPool; import com.liferay.portal.kernel.dao.search.SearchContainer; import com.liferay.portal.kernel.model.Group; import com.liferay.portal.kernel.portlet.LiferayPortletResponse; import com.liferay.portal.kernel.portlet.bridges.mvc.BaseRSSMVCResourceCommand; import com.liferay.portal.kernel.portlet.bridges.mvc.MVCResourceCommand; import com.liferay.portal.kernel.service.GroupLocalService; import com.liferay.portal.kernel.service.ServiceContext; import com.liferay.portal.kernel.service.ServiceContextFactory; import com.liferay.portal.kernel.theme.ThemeDisplay; import com.liferay.portal.kernel.util.GetterUtil; import com.liferay.portal.kernel.util.HtmlUtil; import com.liferay.portal.kernel.util.ParamUtil; import com.liferay.portal.kernel.util.Portal; import com.liferay.portal.kernel.util.Validator; import com.liferay.portal.kernel.util.WebKeys; import com.liferay.rss.util.RSSUtil; import com.liferay.social.activities.constants.SocialActivitiesPortletKeys; import com.liferay.social.activities.web.internal.util.SocialActivitiesQueryHelper; import com.liferay.social.kernel.model.SocialActivityFeedEntry; import com.liferay.social.kernel.model.SocialActivitySet; import com.liferay.social.kernel.service.SocialActivityInterpreterLocalService; import com.sun.syndication.feed.synd.SyndContent; import com.sun.syndication.feed.synd.SyndContentImpl; import com.sun.syndication.feed.synd.SyndEntry; import com.sun.syndication.feed.synd.SyndEntryImpl; import com.sun.syndication.feed.synd.SyndFeed; import com.sun.syndication.feed.synd.SyndFeedImpl; import com.sun.syndication.feed.synd.SyndLink; import com.sun.syndication.feed.synd.SyndLinkImpl; import java.util.ArrayList; import java.util.Date; import java.util.List; import javax.portlet.PortletPreferences; import javax.portlet.ResourceRequest; import javax.portlet.ResourceResponse; import javax.portlet.ResourceURL; import org.osgi.service.component.annotations.Component; import org.osgi.service.component.annotations.Reference; /** * @author Brian Wing Shun Chan * @author Vilmos Papp * @author Eduardo Garcia * @author Raymond Aug */ @Component(immediate = true, property = { "javax.portlet.name=" + SocialActivitiesPortletKeys.SOCIAL_ACTIVITIES, "mvc.command.name=rss" }, service = MVCResourceCommand.class) public class RSSMVCResourceCommand extends BaseRSSMVCResourceCommand { protected String exportToRSS(ResourceRequest resourceRequest, ResourceResponse resourceResponse, String title, String description, String format, double version, String displayStyle, List<SocialActivitySet> socialActivitySets, ServiceContext serviceContext) throws Exception { ThemeDisplay themeDisplay = (ThemeDisplay) resourceRequest.getAttribute(WebKeys.THEME_DISPLAY); SyndFeed syndFeed = new SyndFeedImpl(); syndFeed.setDescription(GetterUtil.getString(description, title)); List<SyndEntry> syndEntries = new ArrayList<>(); syndFeed.setEntries(syndEntries); for (SocialActivitySet socialActivitySet : socialActivitySets) { SocialActivityFeedEntry socialActivityFeedEntry = _socialActivityInterpreterLocalService .interpret(StringPool.BLANK, socialActivitySet, serviceContext); if (socialActivityFeedEntry == null) { continue; } SyndEntry syndEntry = new SyndEntryImpl(); SyndContent syndContent = new SyndContentImpl(); syndContent.setType(RSSUtil.ENTRY_TYPE_DEFAULT); String value = null; if (displayStyle.equals(RSSUtil.DISPLAY_STYLE_TITLE)) { value = StringPool.BLANK; } else { value = socialActivityFeedEntry.getBody(); } syndContent.setValue(value); syndEntry.setDescription(syndContent); if (Validator.isNotNull(socialActivityFeedEntry.getLink())) { syndEntry.setLink(socialActivityFeedEntry.getLink()); } syndEntry.setPublishedDate(new Date(socialActivitySet.getCreateDate())); syndEntry.setTitle(HtmlUtil.extractText(socialActivityFeedEntry.getTitle())); syndEntry.setUri(syndEntry.getLink()); syndEntries.add(syndEntry); } syndFeed.setFeedType(RSSUtil.getFeedType(format, version)); List<SyndLink> syndLinks = new ArrayList<>(); syndFeed.setLinks(syndLinks); SyndLink selfSyndLink = new SyndLinkImpl(); syndLinks.add(selfSyndLink); LiferayPortletResponse liferayPortletResponse = _portal.getLiferayPortletResponse(resourceResponse); ResourceURL rssURL = liferayPortletResponse.createResourceURL(); rssURL.setParameter("feedTitle", title); rssURL.setResourceID("rss"); selfSyndLink.setHref(rssURL.toString()); selfSyndLink.setRel("self"); SyndLink alternateSyndLink = new SyndLinkImpl(); syndLinks.add(alternateSyndLink); alternateSyndLink.setHref(_portal.getLayoutFullURL(themeDisplay)); alternateSyndLink.setRel("alternate"); syndFeed.setPublishedDate(new Date()); syndFeed.setTitle(title); syndFeed.setUri(rssURL.toString()); return RSSUtil.export(syndFeed); } @Override protected byte[] getRSS(ResourceRequest resourceRequest, ResourceResponse resourceResponse) throws Exception { ThemeDisplay themeDisplay = (ThemeDisplay) resourceRequest.getAttribute(WebKeys.THEME_DISPLAY); String tabs1 = ParamUtil.getString(resourceRequest, "tabs1", "all"); String feedTitle = ParamUtil.getString(resourceRequest, "feedTitle"); String format = ParamUtil.getString(resourceRequest, "type", RSSUtil.FORMAT_DEFAULT); double version = ParamUtil.getDouble(resourceRequest, "version", RSSUtil.VERSION_DEFAULT); String displayStyle = ParamUtil.getString(resourceRequest, "displayStyle", RSSUtil.DISPLAY_STYLE_DEFAULT); int max = ParamUtil.getInteger(resourceRequest, "max", SearchContainer.DEFAULT_DELTA); Group group = _groupLocalService.getGroup(themeDisplay.getScopeGroupId()); SocialActivitiesQueryHelper.Scope scope = SocialActivitiesQueryHelper.Scope.fromValue(tabs1); List<SocialActivitySet> socialActivitySets = _socialActivitiesQueryHelper.getSocialActivitySets(group, themeDisplay.getLayout(), scope, 0, max); ServiceContext serviceContext = ServiceContextFactory.getInstance(resourceRequest); String rss = exportToRSS(resourceRequest, resourceResponse, feedTitle, null, format, version, displayStyle, socialActivitySets, serviceContext); return rss.getBytes(StringPool.UTF8); } @Override protected boolean isRSSFeedsEnabled(ResourceRequest resourceRequest) { if (!super.isRSSFeedsEnabled(resourceRequest)) { return false; } PortletPreferences portletPreferences = resourceRequest.getPreferences(); return GetterUtil.getBoolean(portletPreferences.getValue("enableRss", null), true); } @Reference(unbind = "-") protected void setGroupLocalService(GroupLocalService groupLocalService) { _groupLocalService = groupLocalService; } @Reference(unbind = "-") protected void setSocialActivitiesQueryHelper(SocialActivitiesQueryHelper socialActivitiesQueryHelper) { _socialActivitiesQueryHelper = socialActivitiesQueryHelper; } @Reference(unbind = "-") protected void setSocialActivityInterpreterLocalService( SocialActivityInterpreterLocalService socialActivityInterpreterLocalService) { _socialActivityInterpreterLocalService = socialActivityInterpreterLocalService; } private GroupLocalService _groupLocalService; @Reference private Portal _portal; private SocialActivitiesQueryHelper _socialActivitiesQueryHelper; private SocialActivityInterpreterLocalService _socialActivityInterpreterLocalService; }