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08e897113d
And matching ImportOrder settings for Eclipse in resources/eclipse/smack.importorder
261 lines
12 KiB
Java
261 lines
12 KiB
Java
/**
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*
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* Copyright 2003-2007 Jive Software.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.jivesoftware.smackx.offline;
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import java.util.ArrayList;
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import java.util.List;
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import org.jivesoftware.smack.SmackException.NoResponseException;
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import org.jivesoftware.smack.SmackException.NotConnectedException;
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import org.jivesoftware.smack.StanzaCollector;
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import org.jivesoftware.smack.XMPPConnection;
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import org.jivesoftware.smack.XMPPException.XMPPErrorException;
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import org.jivesoftware.smack.filter.AndFilter;
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import org.jivesoftware.smack.filter.StanzaExtensionFilter;
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import org.jivesoftware.smack.filter.StanzaFilter;
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import org.jivesoftware.smack.filter.StanzaTypeFilter;
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import org.jivesoftware.smack.packet.IQ;
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import org.jivesoftware.smack.packet.Message;
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import org.jivesoftware.smack.packet.Stanza;
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import org.jivesoftware.smackx.disco.ServiceDiscoveryManager;
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import org.jivesoftware.smackx.disco.packet.DiscoverInfo;
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import org.jivesoftware.smackx.disco.packet.DiscoverItems;
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import org.jivesoftware.smackx.offline.packet.OfflineMessageInfo;
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import org.jivesoftware.smackx.offline.packet.OfflineMessageRequest;
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import org.jivesoftware.smackx.xdata.Form;
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/**
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* The OfflineMessageManager helps manage offline messages even before the user has sent an
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* available presence. When a user asks for his offline messages before sending an available
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* presence then the server will not send a flood with all the offline messages when the user
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* becomes online. The server will not send a flood with all the offline messages to the session
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* that made the offline messages request or to any other session used by the user that becomes
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* online.<p>
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*
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* Once the session that made the offline messages request has been closed and the user becomes
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* offline in all the resources then the server will resume storing the messages offline and will
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* send all the offline messages to the user when he becomes online. Therefore, the server will
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* flood the user when he becomes online unless the user uses this class to manage his offline
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* messages.
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*
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* @author Gaston Dombiak
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*/
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public class OfflineMessageManager {
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private final static String namespace = "http://jabber.org/protocol/offline";
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private final XMPPConnection connection;
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private static final StanzaFilter PACKET_FILTER = new AndFilter(new StanzaExtensionFilter(
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new OfflineMessageInfo()), StanzaTypeFilter.MESSAGE);
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public OfflineMessageManager(XMPPConnection connection) {
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this.connection = connection;
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}
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/**
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* Returns true if the server supports Flexible Offline Message Retrieval. When the server
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* supports Flexible Offline Message Retrieval it is possible to get the header of the offline
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* messages, get specific messages, delete specific messages, etc.
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*
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* @return a boolean indicating if the server supports Flexible Offline Message Retrieval.
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* @throws XMPPErrorException If the user is not allowed to make this request.
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* @throws NoResponseException if there was no response from the server.
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* @throws NotConnectedException
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* @throws InterruptedException
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*/
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public boolean supportsFlexibleRetrieval() throws NoResponseException, XMPPErrorException, NotConnectedException, InterruptedException {
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return ServiceDiscoveryManager.getInstanceFor(connection).serverSupportsFeature(namespace);
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}
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/**
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* Returns the number of offline messages for the user of the connection.
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*
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* @return the number of offline messages for the user of the connection.
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* @throws XMPPErrorException If the user is not allowed to make this request or the server does
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* not support offline message retrieval.
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* @throws NoResponseException if there was no response from the server.
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* @throws NotConnectedException
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* @throws InterruptedException
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*/
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public int getMessageCount() throws NoResponseException, XMPPErrorException, NotConnectedException, InterruptedException {
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DiscoverInfo info = ServiceDiscoveryManager.getInstanceFor(connection).discoverInfo(null,
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namespace);
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Form extendedInfo = Form.getFormFrom(info);
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if (extendedInfo != null) {
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String value = extendedInfo.getField("number_of_messages").getValues().get(0);
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return Integer.parseInt(value);
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}
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return 0;
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}
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/**
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* Returns a List of <tt>OfflineMessageHeader</tt> that keep information about the
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* offline message. The OfflineMessageHeader includes a stamp that could be used to retrieve
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* the complete message or delete the specific message.
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*
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* @return a List of <tt>OfflineMessageHeader</tt> that keep information about the offline
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* message.
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* @throws XMPPErrorException If the user is not allowed to make this request or the server does
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* not support offline message retrieval.
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* @throws NoResponseException if there was no response from the server.
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* @throws NotConnectedException
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* @throws InterruptedException
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*/
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public List<OfflineMessageHeader> getHeaders() throws NoResponseException, XMPPErrorException, NotConnectedException, InterruptedException {
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List<OfflineMessageHeader> answer = new ArrayList<OfflineMessageHeader>();
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DiscoverItems items = ServiceDiscoveryManager.getInstanceFor(connection).discoverItems(
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null, namespace);
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for (DiscoverItems.Item item : items.getItems()) {
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answer.add(new OfflineMessageHeader(item));
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}
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return answer;
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}
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/**
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* Returns a List of the offline <tt>Messages</tt> whose stamp matches the specified
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* request. The request will include the list of stamps that uniquely identifies
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* the offline messages to retrieve. The returned offline messages will not be deleted
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* from the server. Use {@link #deleteMessages(java.util.List)} to delete the messages.
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*
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* @param nodes the list of stamps that uniquely identifies offline message.
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* @return a List with the offline <tt>Messages</tt> that were received as part of
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* this request.
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* @throws XMPPErrorException If the user is not allowed to make this request or the server does
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* not support offline message retrieval.
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* @throws NoResponseException if there was no response from the server.
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* @throws NotConnectedException
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* @throws InterruptedException
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*/
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public List<Message> getMessages(final List<String> nodes) throws NoResponseException, XMPPErrorException, NotConnectedException, InterruptedException {
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List<Message> messages = new ArrayList<Message>();
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OfflineMessageRequest request = new OfflineMessageRequest();
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for (String node : nodes) {
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OfflineMessageRequest.Item item = new OfflineMessageRequest.Item(node);
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item.setAction("view");
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request.addItem(item);
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}
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// Filter offline messages that were requested by this request
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StanzaFilter messageFilter = new AndFilter(PACKET_FILTER, new StanzaFilter() {
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@Override
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public boolean accept(Stanza packet) {
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OfflineMessageInfo info = (OfflineMessageInfo) packet.getExtension("offline",
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namespace);
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return nodes.contains(info.getNode());
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}
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});
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int pendingNodes = nodes.size();
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StanzaCollector messageCollector = connection.createStanzaCollector(messageFilter);
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try {
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connection.createStanzaCollectorAndSend(request).nextResultOrThrow();
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// Collect the received offline messages
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Message message = messageCollector.nextResult();
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while (message != null && pendingNodes > 0) {
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pendingNodes--;
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messages.add(message);
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message = messageCollector.nextResult();
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}
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}
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finally {
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// Stop queuing offline messages
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messageCollector.cancel();
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}
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return messages;
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}
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/**
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* Returns a List of Messages with all the offline <tt>Messages</tt> of the user. The returned offline
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* messages will not be deleted from the server. Use {@link #deleteMessages(java.util.List)}
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* to delete the messages.
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*
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* @return a List with all the offline <tt>Messages</tt> of the user.
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* @throws XMPPErrorException If the user is not allowed to make this request or the server does
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* not support offline message retrieval.
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* @throws NoResponseException if there was no response from the server.
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* @throws NotConnectedException
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* @throws InterruptedException
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*/
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public List<Message> getMessages() throws NoResponseException, XMPPErrorException, NotConnectedException, InterruptedException {
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OfflineMessageRequest request = new OfflineMessageRequest();
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request.setFetch(true);
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StanzaCollector resultCollector = connection.createStanzaCollectorAndSend(request);
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StanzaCollector.Configuration messageCollectorConfiguration = StanzaCollector.newConfiguration().setStanzaFilter(PACKET_FILTER).setCollectorToReset(resultCollector);
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StanzaCollector messageCollector = connection.createStanzaCollector(messageCollectorConfiguration);
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List<Message> messages = null;
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try {
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resultCollector.nextResultOrThrow();
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// Be extra safe, cancel the message collector right here so that it does not collector
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// other messages that eventually match (although I've no idea how this could happen in
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// case of XEP-13).
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messageCollector.cancel();
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messages = new ArrayList<>(messageCollector.getCollectedCount());
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Message message;
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while ((message = messageCollector.pollResult()) != null) {
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messages.add(message);
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}
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}
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finally {
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// Ensure that the message collector is canceled even if nextResultOrThrow threw. It
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// doesn't matter if we cancel the message collector twice
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messageCollector.cancel();
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}
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return messages;
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}
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/**
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* Deletes the specified list of offline messages. The request will include the list of
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* stamps that uniquely identifies the offline messages to delete.
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*
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* @param nodes the list of stamps that uniquely identifies offline message.
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* @throws XMPPErrorException If the user is not allowed to make this request or the server does
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* not support offline message retrieval.
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* @throws NoResponseException if there was no response from the server.
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* @throws NotConnectedException
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* @throws InterruptedException
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*/
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public void deleteMessages(List<String> nodes) throws NoResponseException, XMPPErrorException, NotConnectedException, InterruptedException {
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OfflineMessageRequest request = new OfflineMessageRequest();
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request.setType(IQ.Type.set);
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for (String node : nodes) {
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OfflineMessageRequest.Item item = new OfflineMessageRequest.Item(node);
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item.setAction("remove");
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request.addItem(item);
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}
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connection.createStanzaCollectorAndSend(request).nextResultOrThrow();
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}
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/**
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* Deletes all offline messages of the user.
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*
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* @throws XMPPErrorException If the user is not allowed to make this request or the server does
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* not support offline message retrieval.
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* @throws NoResponseException if there was no response from the server.
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* @throws NotConnectedException
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* @throws InterruptedException
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*/
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public void deleteMessages() throws NoResponseException, XMPPErrorException, NotConnectedException, InterruptedException {
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OfflineMessageRequest request = new OfflineMessageRequest();
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request.setType(IQ.Type.set);
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request.setPurge(true);
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connection.createStanzaCollectorAndSend(request).nextResultOrThrow();
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}
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}
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