/* * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you 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.apache.vysper.xmpp.modules.extension.xep0160_offline_storage; import org.apache.vysper.xmpp.stanza.MessageStanza; import org.apache.vysper.xmpp.stanza.MessageStanzaType; import org.apache.vysper.xmpp.stanza.PresenceStanza; import org.apache.vysper.xmpp.stanza.PresenceStanzaType; import org.apache.vysper.xmpp.stanza.Stanza; import org.apache.vysper.xmpp.stanza.XMPPCoreStanza; import org.slf4j.Logger; import org.slf4j.LoggerFactory; public abstract class AbstractOfflineStorageProvider implements OfflineStorageProvider { final Logger logger = LoggerFactory.getLogger(AbstractOfflineStorageProvider.class); /** checks if a stanza should be stored for offline receivers */ public void receive(Stanza stanza) { stanza = XMPPCoreStanza.getWrapper(stanza); // according to XEP-0160 only certain stanzas should be stored boolean store = false; logger.debug("Received Stanza for offline storage:" + stanza.getClass().getSimpleName()); if (stanza instanceof MessageStanza) { MessageStanza messageStanza = (MessageStanza) stanza; MessageStanzaType type = messageStanza.getMessageType(); switch (type) { case NORMAL: case CHAT: store = true; break; case GROUPCHAT: case ERROR: case HEADLINE: store = false; break; default: throw new RuntimeException("unknown mesage type " + type); } } else if (stanza instanceof PresenceStanza) { PresenceStanza presenceStanza = (PresenceStanza) stanza; PresenceStanzaType type = presenceStanza.getPresenceType(); switch (type) { case SUBSCRIBE: case SUBSCRIBED: case UNSUBSCRIBE: case UNSUBSCRIBED: store = true; break; case ERROR: case PROBE: case UNAVAILABLE: store = false; break; default: throw new RuntimeException("unknown presence type " + type); } } if (!store) { logger.debug("Stanza is not intended for offline storage"); return; } logger.debug("Stanza will be stored offline"); storeStanza(stanza); } /** does the actual storage mechanism */ protected abstract void storeStanza(Stanza stanza); }