Java tutorial
/** * Copyright (c) 2000-2013 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.portlet.messageboards.action; import com.liferay.portal.kernel.json.JSONFactoryUtil; import com.liferay.portal.kernel.json.JSONObject; import com.liferay.portal.kernel.servlet.SessionErrors; import com.liferay.portal.kernel.util.Constants; import com.liferay.portal.kernel.util.ParamUtil; import com.liferay.portal.kernel.workflow.WorkflowConstants; import com.liferay.portal.model.User; import com.liferay.portal.security.auth.PrincipalException; import com.liferay.portal.security.auth.PrincipalThreadLocal; import com.liferay.portal.service.ServiceContext; import com.liferay.portal.service.ServiceContextFactory; import com.liferay.portal.service.SubscriptionLocalServiceUtil; import com.liferay.portal.service.UserLocalServiceUtil; import com.liferay.portal.struts.PortletAction; import com.liferay.portal.theme.ThemeDisplay; import com.liferay.portal.util.PortalUtil; import com.liferay.portal.util.WebKeys; import com.liferay.portlet.messageboards.MessageBodyException; import com.liferay.portlet.messageboards.NoSuchMessageException; import com.liferay.portlet.messageboards.RequiredMessageException; import com.liferay.portlet.messageboards.model.MBMessage; import com.liferay.portlet.messageboards.service.MBMessageServiceUtil; import javax.portlet.ActionRequest; import javax.portlet.ActionResponse; import javax.portlet.PortletConfig; import javax.portlet.RenderRequest; import javax.portlet.RenderResponse; import org.apache.struts.action.ActionForm; import org.apache.struts.action.ActionForward; import org.apache.struts.action.ActionMapping; /** * @author Brian Wing Shun Chan * @author Sergio Gonzlez */ public class EditDiscussionAction extends PortletAction { @Override public void processAction(ActionMapping actionMapping, ActionForm actionForm, PortletConfig portletConfig, ActionRequest actionRequest, ActionResponse actionResponse) throws Exception { String cmd = ParamUtil.getString(actionRequest, Constants.CMD); try { String redirect = PortalUtil.escapeRedirect(ParamUtil.getString(actionRequest, "redirect")); if (cmd.equals(Constants.ADD) || cmd.equals(Constants.UPDATE)) { MBMessage message = updateMessage(actionRequest); boolean ajax = ParamUtil.getBoolean(actionRequest, "ajax"); if (ajax) { String randomNamespace = ParamUtil.getString(actionRequest, "randomNamespace"); JSONObject jsonObject = JSONFactoryUtil.createJSONObject(); jsonObject.put("messageId", message.getMessageId()); jsonObject.put("randomNamespace", randomNamespace); writeJSON(actionRequest, actionResponse, jsonObject); return; } } else if (cmd.equals(Constants.DELETE)) { deleteMessage(actionRequest); } else if (cmd.equals(Constants.SUBSCRIBE_TO_COMMENTS)) { subscribeToComments(actionRequest, true); } else if (cmd.equals(Constants.UNSUBSCRIBE_FROM_COMMENTS)) { subscribeToComments(actionRequest, false); } sendRedirect(actionRequest, actionResponse, redirect); } catch (Exception e) { if (e instanceof MessageBodyException || e instanceof NoSuchMessageException || e instanceof PrincipalException || e instanceof RequiredMessageException) { JSONObject jsonObject = JSONFactoryUtil.createJSONObject(); jsonObject.putException(e); writeJSON(actionRequest, actionResponse, jsonObject); } else { throw e; } } } @Override public ActionForward render(ActionMapping actionMapping, ActionForm actionForm, PortletConfig portletConfig, RenderRequest renderRequest, RenderResponse renderResponse) throws Exception { try { ActionUtil.getMessage(renderRequest); } catch (Exception e) { if (e instanceof NoSuchMessageException || e instanceof PrincipalException) { SessionErrors.add(renderRequest, e.getClass()); return actionMapping.findForward("portlet.message_boards.error"); } else { throw e; } } return actionMapping.findForward(getForward(renderRequest, "portlet.message_boards.edit_discussion")); } protected void deleteMessage(ActionRequest actionRequest) throws Exception { long groupId = PortalUtil.getScopeGroupId(actionRequest); String className = ParamUtil.getString(actionRequest, "className"); long classPK = ParamUtil.getLong(actionRequest, "classPK"); String permissionClassName = ParamUtil.getString(actionRequest, "permissionClassName"); long permissionClassPK = ParamUtil.getLong(actionRequest, "permissionClassPK"); long permissionOwnerId = ParamUtil.getLong(actionRequest, "permissionOwnerId"); long messageId = ParamUtil.getLong(actionRequest, "messageId"); MBMessageServiceUtil.deleteDiscussionMessage(groupId, className, classPK, permissionClassName, permissionClassPK, permissionOwnerId, messageId); } @Override protected boolean isCheckMethodOnProcessAction() { return _CHECK_METHOD_ON_PROCESS_ACTION; } protected void subscribeToComments(ActionRequest actionRequest, boolean subscribe) throws Exception { ThemeDisplay themeDisplay = (ThemeDisplay) actionRequest.getAttribute(WebKeys.THEME_DISPLAY); String className = ParamUtil.getString(actionRequest, "className"); long classPK = ParamUtil.getLong(actionRequest, "classPK"); if (subscribe) { SubscriptionLocalServiceUtil.addSubscription(themeDisplay.getUserId(), themeDisplay.getScopeGroupId(), className, classPK); } else { SubscriptionLocalServiceUtil.deleteSubscription(themeDisplay.getUserId(), className, classPK); } } protected MBMessage updateMessage(ActionRequest actionRequest) throws Exception { ThemeDisplay themeDisplay = (ThemeDisplay) actionRequest.getAttribute(WebKeys.THEME_DISPLAY); String className = ParamUtil.getString(actionRequest, "className"); long classPK = ParamUtil.getLong(actionRequest, "classPK"); String permissionClassName = ParamUtil.getString(actionRequest, "permissionClassName"); long permissionClassPK = ParamUtil.getLong(actionRequest, "permissionClassPK"); long permissionOwnerId = ParamUtil.getLong(actionRequest, "permissionOwnerId"); long messageId = ParamUtil.getLong(actionRequest, "messageId"); long threadId = ParamUtil.getLong(actionRequest, "threadId"); long parentMessageId = ParamUtil.getLong(actionRequest, "parentMessageId"); String subject = ParamUtil.getString(actionRequest, "subject"); String body = ParamUtil.getString(actionRequest, "body"); ServiceContext serviceContext = ServiceContextFactory.getInstance(MBMessage.class.getName(), actionRequest); MBMessage message = null; if (messageId <= 0) { // Add message User user = null; if (themeDisplay.isSignedIn()) { user = themeDisplay.getUser(); } else { String emailAddress = ParamUtil.getString(actionRequest, "emailAddress"); user = UserLocalServiceUtil.fetchUserByEmailAddress(themeDisplay.getCompanyId(), emailAddress); if ((user == null) || (user.getStatus() != WorkflowConstants.STATUS_INCOMPLETE)) { return null; } } String name = PrincipalThreadLocal.getName(); PrincipalThreadLocal.setName(user.getUserId()); try { message = MBMessageServiceUtil.addDiscussionMessage(serviceContext.getScopeGroupId(), className, classPK, permissionClassName, permissionClassPK, permissionOwnerId, threadId, parentMessageId, subject, body, serviceContext); } finally { PrincipalThreadLocal.setName(name); } } else { // Update message message = MBMessageServiceUtil.updateDiscussionMessage(className, classPK, permissionClassName, permissionClassPK, permissionOwnerId, messageId, subject, body, serviceContext); } // Subscription boolean subscribe = ParamUtil.getBoolean(actionRequest, "subscribe"); if (subscribe) { SubscriptionLocalServiceUtil.addSubscription(themeDisplay.getUserId(), themeDisplay.getScopeGroupId(), className, classPK); } return message; } private static final boolean _CHECK_METHOD_ON_PROCESS_ACTION = false; }