Java tutorial
/* * Copyright 2010 Vodafone Group Services Ltd. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. * */ package org.onesocialweb.openfire.handler.activity; import org.dom4j.Attribute; import org.dom4j.Element; import org.jivesoftware.openfire.XMPPServer; import org.jivesoftware.openfire.auth.UnauthorizedException; import org.jivesoftware.openfire.user.UserManager; import org.jivesoftware.util.LocaleUtils; import org.jivesoftware.util.Log; import org.onesocialweb.openfire.handler.pep.PEPCommandHandler; import org.onesocialweb.openfire.manager.ActivityManager; import org.xmpp.packet.IQ; import org.xmpp.packet.JID; import org.xmpp.packet.PacketError; public class ActivityUnsubscribeHandler extends PEPCommandHandler { public static final String COMMAND = "unsubscribe"; private UserManager userManager; public ActivityUnsubscribeHandler() { super("OneSocialWeb - Unsubscribe to a user activities"); } @Override public String getCommand() { return COMMAND; } @SuppressWarnings({ "deprecation" }) @Override public IQ handleIQ(IQ packet) throws UnauthorizedException { JID sender = packet.getFrom(); JID recipient = packet.getTo(); // Process the request inside a try/catch so that unhandled exceptions // (oufofbounds etc...) can trigger a server error and we can send a // error result packet try { // A valid request is an IQ of type set, for a valid and local recipient if (!(packet.getType().equals(IQ.Type.set) && recipient != null && recipient.getNode() != null && userManager.isRegisteredUser(recipient.getNode()))) { IQ result = IQ.createResultIQ(packet); result.setChildElement(packet.getChildElement().createCopy()); result.setError(PacketError.Condition.bad_request); return result; } // A valid request has a (bare) JID attribute Element pubsubElement = packet.getChildElement(); Element subscribeElement = pubsubElement.element("unsubscribe"); Attribute jidAttribute = subscribeElement.attribute("jid"); if (jidAttribute == null || !sender.toBareJID().equals(jidAttribute.getValue())) { IQ result = IQ.createResultIQ(packet); result.setChildElement(packet.getChildElement().createCopy()); result.setError(PacketError.Condition.bad_request); return result; } // Add the relation to the database ActivityManager.getInstance().unsubscribe(sender.toBareJID(), recipient.toBareJID()); // Return and send a result packet IQ result = IQ.createResultIQ(packet); return result; } catch (Exception e) { Log.error(LocaleUtils.getLocalizedString("admin.error"), e); IQ result = IQ.createResultIQ(packet); result.setChildElement(packet.getChildElement().createCopy()); result.setError(PacketError.Condition.internal_server_error); return result; } } @Override public void initialize(XMPPServer server) { super.initialize(server); userManager = server.getUserManager(); } }