/** * * Copyright 2003-2007 Jive Software. * * 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.jivesoftware.smackx.offline; import org.jivesoftware.smack.PacketCollector; import org.jivesoftware.smack.SmackException.NoResponseException; import org.jivesoftware.smack.SmackException.NotConnectedException; import org.jivesoftware.smack.XMPPConnection; import org.jivesoftware.smack.XMPPException.XMPPErrorException; import org.jivesoftware.smack.filter.AndFilter; import org.jivesoftware.smack.filter.PacketExtensionFilter; import org.jivesoftware.smack.filter.PacketFilter; import org.jivesoftware.smack.filter.PacketTypeFilter; import org.jivesoftware.smack.packet.Message; import org.jivesoftware.smack.packet.Packet; import org.jivesoftware.smackx.disco.ServiceDiscoveryManager; import org.jivesoftware.smackx.disco.packet.DiscoverInfo; import org.jivesoftware.smackx.disco.packet.DiscoverItems; import org.jivesoftware.smackx.offline.packet.OfflineMessageInfo; import org.jivesoftware.smackx.offline.packet.OfflineMessageRequest; import org.jivesoftware.smackx.xdata.Form; import java.util.ArrayList; import java.util.List; /** * The OfflineMessageManager helps manage offline messages even before the user has sent an * available presence. When a user asks for his offline messages before sending an available * presence then the server will not send a flood with all the offline messages when the user * becomes online. The server will not send a flood with all the offline messages to the session * that made the offline messages request or to any other session used by the user that becomes * online.
*
* Once the session that made the offline messages request has been closed and the user becomes
* offline in all the resources then the server will resume storing the messages offline and will
* send all the offline messages to the user when he becomes online. Therefore, the server will
* flood the user when he becomes online unless the user uses this class to manage his offline
* messages.
*
* @author Gaston Dombiak
*/
public class OfflineMessageManager {
private final static String namespace = "http://jabber.org/protocol/offline";
private final XMPPConnection connection;
private static final PacketFilter PACKET_FILTER = new AndFilter(new PacketExtensionFilter(
new OfflineMessageInfo()), PacketTypeFilter.MESSAGE);
public OfflineMessageManager(XMPPConnection connection) {
this.connection = connection;
}
/**
* Returns true if the server supports Flexible Offline Message Retrieval. When the server
* supports Flexible Offline Message Retrieval it is possible to get the header of the offline
* messages, get specific messages, delete specific messages, etc.
*
* @return a boolean indicating if the server supports Flexible Offline Message Retrieval.
* @throws XMPPErrorException If the user is not allowed to make this request.
* @throws NoResponseException if there was no response from the server.
* @throws NotConnectedException
*/
public boolean supportsFlexibleRetrieval() throws NoResponseException, XMPPErrorException, NotConnectedException {
return ServiceDiscoveryManager.getInstanceFor(connection).serverSupportsFeature(namespace);
}
/**
* Returns the number of offline messages for the user of the connection.
*
* @return the number of offline messages for the user of the connection.
* @throws XMPPErrorException If the user is not allowed to make this request or the server does
* not support offline message retrieval.
* @throws NoResponseException if there was no response from the server.
* @throws NotConnectedException
*/
public int getMessageCount() throws NoResponseException, XMPPErrorException, NotConnectedException {
DiscoverInfo info = ServiceDiscoveryManager.getInstanceFor(connection).discoverInfo(null,
namespace);
Form extendedInfo = Form.getFormFrom(info);
if (extendedInfo != null) {
String value = extendedInfo.getField("number_of_messages").getValues().get(0);
return Integer.parseInt(value);
}
return 0;
}
/**
* Returns a List of OfflineMessageHeader that keep information about the
* offline message. The OfflineMessageHeader includes a stamp that could be used to retrieve
* the complete message or delete the specific message.
*
* @return a List of OfflineMessageHeader that keep information about the offline
* message.
* @throws XMPPErrorException If the user is not allowed to make this request or the server does
* not support offline message retrieval.
* @throws NoResponseException if there was no response from the server.
* @throws NotConnectedException
*/
public List