Roster.java
/**
*
* Copyright 2003-2007 Jive Software, 2016-2022 Florian Schmaus.
*
* 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.smack.roster;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.HashSet;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.WeakHashMap;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.CopyOnWriteArraySet;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.jivesoftware.smack.AsyncButOrdered;
import org.jivesoftware.smack.ConnectionCreationListener;
import org.jivesoftware.smack.ConnectionListener;
import org.jivesoftware.smack.Manager;
import org.jivesoftware.smack.SmackException;
import org.jivesoftware.smack.SmackException.FeatureNotSupportedException;
import org.jivesoftware.smack.SmackException.NoResponseException;
import org.jivesoftware.smack.SmackException.NotConnectedException;
import org.jivesoftware.smack.SmackException.NotLoggedInException;
import org.jivesoftware.smack.SmackFuture;
import org.jivesoftware.smack.StanzaListener;
import org.jivesoftware.smack.XMPPConnection;
import org.jivesoftware.smack.XMPPConnectionRegistry;
import org.jivesoftware.smack.XMPPException.XMPPErrorException;
import org.jivesoftware.smack.filter.AndFilter;
import org.jivesoftware.smack.filter.PresenceTypeFilter;
import org.jivesoftware.smack.filter.StanzaFilter;
import org.jivesoftware.smack.filter.StanzaTypeFilter;
import org.jivesoftware.smack.filter.ToMatchesFilter;
import org.jivesoftware.smack.iqrequest.AbstractIqRequestHandler;
import org.jivesoftware.smack.packet.IQ;
import org.jivesoftware.smack.packet.Presence;
import org.jivesoftware.smack.packet.PresenceBuilder;
import org.jivesoftware.smack.packet.Stanza;
import org.jivesoftware.smack.packet.StanzaBuilder;
import org.jivesoftware.smack.packet.StanzaError.Condition;
import org.jivesoftware.smack.roster.SubscribeListener.SubscribeAnswer;
import org.jivesoftware.smack.roster.packet.RosterPacket;
import org.jivesoftware.smack.roster.packet.RosterPacket.Item;
import org.jivesoftware.smack.roster.packet.RosterVer;
import org.jivesoftware.smack.roster.packet.SubscriptionPreApproval;
import org.jivesoftware.smack.roster.rosterstore.RosterStore;
import org.jivesoftware.smack.util.ExceptionCallback;
import org.jivesoftware.smack.util.Objects;
import org.jivesoftware.smack.util.SuccessCallback;
import org.jxmpp.jid.BareJid;
import org.jxmpp.jid.EntityBareJid;
import org.jxmpp.jid.EntityFullJid;
import org.jxmpp.jid.FullJid;
import org.jxmpp.jid.Jid;
import org.jxmpp.jid.impl.JidCreate;
import org.jxmpp.jid.parts.Resourcepart;
import org.jxmpp.util.cache.LruCache;
/**
* <p>
* The roster lets you keep track of the availability ("presence") of other
* users. A roster also allows you to organize users into groups such as
* "Friends" and "Co-workers". Other IM systems refer to the roster as the buddy
* list, contact list, etc.
* </p>
* <p>
* You can obtain a Roster instance for your connection via
* {@link #getInstanceFor(XMPPConnection)}. A detailed description of the
* protocol behind the Roster and Presence semantics can be found in
* <a href="https://tools.ietf.org/html/rfc6121">RFC 6120</a>.
* </p>
*
* <h2>Roster Entries</h2>
* Every user in a roster is represented by a RosterEntry, which consists
* of:
* <ul>
* <li>An XMPP address, aka. JID (e.g. jsmith@example.com).</li>
* <li>A name you've assigned to the user (e.g. "Joe").</li>
* <li>The list of groups in the roster that the entry belongs to. If the roster
* entry belongs to no groups, it's called an "unfiled entry".</li>
* </ul>
* The following code snippet prints all entries in the roster:
*
* <pre>{@code
* Roster roster = Roster.getInstanceFor(connection);
* Collection<RosterEntry> entries = roster.getEntries();
* for (RosterEntry entry : entries) {
* System.out.println(entry);
* }
* }</pre>
*
* Methods also exist to get individual entries, the list of unfiled entries, or
* to get one or all roster groups.
*
* <h2>Presence</h2>
* <p>
* Every entry in the roster has presence associated with it. The
* {@link #getPresence(BareJid)} method will return a Presence object with the
* user's presence or `null` if the user is not online or you are not subscribed
* to the user's presence. _Note:_ Presence subscription is nnot tied to the
* user being on the roster, and vice versa: You could be subscriped to a remote
* users presence without the user in your roster, and a remote user can be in
* your roster without any presence subscription relation.
* </p>
* <p>
* A user either has a presence of online or offline. When a user is online,
* their presence may contain extended information such as what they are
* currently doing, whether they wish to be disturbed, etc. See the Presence
* class for further details.
* </p>
*
* <h2>Listening for Roster and Presence Changes</h2>
* <p>
* The typical use of the roster class is to display a tree view of groups and
* entries along with the current presence value of each entry. As an example,
* see the image showing a Roster in the Exodus XMPP client to the right.
* </p>
* <p>
* The presence information will likely change often, and it's also possible for
* the roster entries to change or be deleted. To listen for changing roster and
* presence data, a RosterListener should be used. To be informed about all
* changes to the roster the RosterListener should be registered before logging
* into the XMPP server. The following code snippet registers a RosterListener
* with the Roster that prints any presence changes in the roster to standard
* out. A normal client would use similar code to update the roster UI with the
* changing information.
* </p>
*
* <pre>{@code
* Roster roster = Roster.getInstanceFor(con);
* roster.addRosterListener(new RosterListener() {
* // Ignored events public void entriesAdded(Collection<String> addresses) {}
* public void entriesDeleted(Collection<String> addresses) {
* }
*
* public void entriesUpdated(Collection<String> addresses) {
* }
*
* public void presenceChanged(Presence presence) {
* System.out.println("Presence changed: " + presence.getFrom() + " " + presence);
* }
* });
* }</pre>
*
* Note that in order to receive presence changed events you need to be
* subscribed to the users presence. See the following section.
*
* <h2>Adding Entries to the Roster</h2>
*
* <p>
* Rosters and presence use a permissions-based model where users must give
* permission before someone else can see their presence. This protects a user's
* privacy by making sure that only approved users are able to view their
* presence information. Therefore, when you add a new roster entry, you will
* not see the presence information until the other user accepts your request.
* </p>
* <p>
* If another user requests a presence subscription, you must accept or reject
* that request. Smack handles presence subscription requests in one of three
* ways:
* </p>
* <ul>
* <li>Automatically accept all presence subscription requests
* ({@link SubscriptionMode#accept_all accept_all})</li>
* <li>Automatically reject all presence subscription requests
* ({@link SubscriptionMode#reject_all reject_all})</li>
* <li>Process presence subscription requests manually.
* ({@link SubscriptionMode#manual manual})</li>
* </ul>
* <p>
* The mode can be set using {@link #setSubscriptionMode(SubscriptionMode)}.
* Simple clients normally use one of the automated subscription modes, while
* full-featured clients should manually process subscription requests and let
* the end-user accept or reject each request.
* </p>
*
* @author Matt Tucker
* @see #getInstanceFor(XMPPConnection)
*/
public final class Roster extends Manager {
private static final Logger LOGGER = Logger.getLogger(Roster.class.getName());
static {
XMPPConnectionRegistry.addConnectionCreationListener(new ConnectionCreationListener() {
@Override
public void connectionCreated(XMPPConnection connection) {
getInstanceFor(connection);
}
});
}
private static final Map<XMPPConnection, Roster> INSTANCES = new WeakHashMap<>();
/**
* Returns the roster for the user.
* <p>
* This method will never return <code>null</code>, instead if the user has not yet logged into
* the server all modifying methods of the returned roster object
* like {@link Roster#createEntry(BareJid, String, String[])},
* {@link Roster#removeEntry(RosterEntry)} , etc. except adding or removing
* {@link RosterListener}s will throw an IllegalStateException.
* </p>
*
* @param connection the connection the roster should be retrieved for.
* @return the user's roster.
*/
public static synchronized Roster getInstanceFor(XMPPConnection connection) {
Roster roster = INSTANCES.get(connection);
if (roster == null) {
roster = new Roster(connection);
INSTANCES.put(connection, roster);
}
return roster;
}
private static final StanzaFilter PRESENCE_PACKET_FILTER = StanzaTypeFilter.PRESENCE;
private static final StanzaFilter OUTGOING_USER_UNAVAILABLE_PRESENCE = new AndFilter(PresenceTypeFilter.UNAVAILABLE, ToMatchesFilter.MATCH_NO_TO_SET);
private static boolean rosterLoadedAtLoginDefault = true;
/**
* The default subscription processing mode to use when a Roster is created. By default
* all subscription requests are automatically rejected.
*/
private static SubscriptionMode defaultSubscriptionMode = SubscriptionMode.reject_all;
/**
* The initial maximum size of the map holding presence information of entities without an Roster entry. Currently
* {@value #INITIAL_DEFAULT_NON_ROSTER_PRESENCE_MAP_SIZE}.
*/
public static final int INITIAL_DEFAULT_NON_ROSTER_PRESENCE_MAP_SIZE = 1024;
private static int defaultNonRosterPresenceMapMaxSize = INITIAL_DEFAULT_NON_ROSTER_PRESENCE_MAP_SIZE;
private RosterStore rosterStore;
/**
* The groups of this roster.
* <p>
* Note that we use {@link ConcurrentHashMap} also as static type of this field, since we use the fact that the same
* thread can modify this collection, e.g. remove items, while iterating over it. This is done, for example in
* {@link #deleteEntry(Collection, RosterEntry)}. If we do not denote the static type to ConcurrentHashMap, but
* {@link Map} instead, then error prone would report a ModifyCollectionInEnhancedForLoop but.
* </p>
*/
private final ConcurrentHashMap<String, RosterGroup> groups = new ConcurrentHashMap<>();
/**
* Concurrent hash map from JID to its roster entry.
*/
private final Map<BareJid, RosterEntry> entries = new ConcurrentHashMap<>();
private final Set<RosterEntry> unfiledEntries = new CopyOnWriteArraySet<>();
private final Set<RosterListener> rosterListeners = new LinkedHashSet<>();
private final Set<PresenceEventListener> presenceEventListeners = new CopyOnWriteArraySet<>();
/**
* A map of JIDs to another Map of Resourceparts to Presences. The 'inner' map may contain
* {@link Resourcepart#EMPTY} if there are no other Presences available.
*/
private final Map<BareJid, Map<Resourcepart, Presence>> presenceMap = new ConcurrentHashMap<>();
/**
* Like {@link presenceMap} but for presences of entities not in our Roster.
*/
// TODO Ideally we want here to use a LRU cache like Map which will evict all superfluous items
// if their maximum size is lowered below the current item count. LruCache does not provide
// this.
private final LruCache<BareJid, Map<Resourcepart, Presence>> nonRosterPresenceMap = new LruCache<>(
defaultNonRosterPresenceMapMaxSize);
/**
* Listeners called when the Roster was loaded.
*/
private final Set<RosterLoadedListener> rosterLoadedListeners = new LinkedHashSet<>();
/**
* Mutually exclude roster listener invocation and changing the {@link entries} map. Also used
* to synchronize access to either the roster listeners or the entries map.
*/
private final Object rosterListenersAndEntriesLock = new Object();
private enum RosterState {
uninitialized,
loading,
loaded,
}
/**
* The current state of the roster.
*/
private RosterState rosterState = RosterState.uninitialized;
private final PresencePacketListener presencePacketListener = new PresencePacketListener();
/**
*
*/
private boolean rosterLoadedAtLogin = rosterLoadedAtLoginDefault;
private SubscriptionMode subscriptionMode = getDefaultSubscriptionMode();
private final Set<SubscribeListener> subscribeListeners = new CopyOnWriteArraySet<>();
private SubscriptionMode previousSubscriptionMode;
/**
* Returns the default subscription processing mode to use when a new Roster is created. The
* subscription processing mode dictates what action Smack will take when subscription
* requests from other users are made. The default subscription mode
* is {@link SubscriptionMode#reject_all}.
*
* @return the default subscription mode to use for new Rosters
*/
public static SubscriptionMode getDefaultSubscriptionMode() {
return defaultSubscriptionMode;
}
/**
* Sets the default subscription processing mode to use when a new Roster is created. The
* subscription processing mode dictates what action Smack will take when subscription
* requests from other users are made. The default subscription mode
* is {@link SubscriptionMode#reject_all}.
*
* @param subscriptionMode the default subscription mode to use for new Rosters.
*/
public static void setDefaultSubscriptionMode(SubscriptionMode subscriptionMode) {
defaultSubscriptionMode = subscriptionMode;
}
private final AsyncButOrdered<BareJid> asyncButOrdered = new AsyncButOrdered<>();
/**
* Creates a new roster.
*
* @param connection an XMPP connection.
*/
private Roster(final XMPPConnection connection) {
super(connection);
// Note that we use sync packet listeners because RosterListeners should be invoked in the same order as the
// roster stanzas arrive.
// Listen for any roster packets.
connection.registerIQRequestHandler(new RosterPushListener());
// Listen for any presence packets.
connection.addSyncStanzaListener(presencePacketListener, PRESENCE_PACKET_FILTER);
connection.addAsyncStanzaListener(new StanzaListener() {
@SuppressWarnings("fallthrough")
@Override
public void processStanza(Stanza stanza) throws NotConnectedException,
InterruptedException, NotLoggedInException {
Presence presence = (Presence) stanza;
Jid from = presence.getFrom();
SubscribeAnswer subscribeAnswer = null;
switch (subscriptionMode) {
case manual:
for (SubscribeListener subscribeListener : subscribeListeners) {
subscribeAnswer = subscribeListener.processSubscribe(from, presence);
if (subscribeAnswer != null) {
break;
}
}
if (subscribeAnswer == null) {
return;
}
break;
case accept_all:
// Accept all subscription requests.
subscribeAnswer = SubscribeAnswer.Approve;
break;
case reject_all:
// Reject all subscription requests.
subscribeAnswer = SubscribeAnswer.Deny;
break;
}
if (subscribeAnswer == null) {
return;
}
Presence.Type type;
switch (subscribeAnswer) {
case ApproveAndAlsoRequestIfRequired:
BareJid bareFrom = from.asBareJid();
RosterUtil.askForSubscriptionIfRequired(Roster.this, bareFrom);
// The fall through is intended.
case Approve:
type = Presence.Type.subscribed;
break;
case Deny:
type = Presence.Type.unsubscribed;
break;
default:
throw new AssertionError();
}
Presence response = connection.getStanzaFactory().buildPresenceStanza()
.ofType(type)
.to(presence.getFrom())
.build();
connection.sendStanza(response);
}
}, PresenceTypeFilter.SUBSCRIBE);
// Listen for connection events
connection.addConnectionListener(new ConnectionListener() {
@Override
public void authenticated(XMPPConnection connection, boolean resumed) {
if (!isRosterLoadedAtLogin())
return;
// We are done here if the connection was resumed
if (resumed) {
return;
}
// Ensure that all available presences received so far in a eventually existing previous session are
// marked 'offline'.
setOfflinePresencesAndResetLoaded();
try {
Roster.this.reload();
}
catch (InterruptedException | SmackException e) {
LOGGER.log(Level.SEVERE, "Could not reload Roster", e);
return;
}
}
@Override
public void connectionClosed() {
// Changes the presence available contacts to unavailable
setOfflinePresencesAndResetLoaded();
}
});
connection.addStanzaSendingListener(new StanzaListener() {
@Override
public void processStanza(Stanza stanzav) throws NotConnectedException, InterruptedException {
// Once we send an unavailable presence, the server is allowed to suppress sending presence status
// information to us as optimization (RFC 6121 § 4.4.2). Thus XMPP clients which are unavailable, should
// consider the presence information of their contacts as not up-to-date. We make the user obvious of
// this situation by setting the presences of all contacts to unavailable (while keeping the roster
// state).
setOfflinePresences();
}
}, OUTGOING_USER_UNAVAILABLE_PRESENCE);
// If the connection is already established, call reload
if (connection.isAuthenticated()) {
try {
reloadAndWait();
}
catch (InterruptedException | SmackException e) {
LOGGER.log(Level.SEVERE, "Could not reload Roster", e);
}
}
}
/**
* Retrieve the user presences (a map from resource to {@link Presence}) for a given XMPP entity represented by their bare JID.
*
* @param entity the entity
* @return the user presences
*/
private Map<Resourcepart, Presence> getPresencesInternal(BareJid entity) {
Map<Resourcepart, Presence> entityPresences = presenceMap.get(entity);
if (entityPresences == null) {
entityPresences = nonRosterPresenceMap.lookup(entity);
}
return entityPresences;
}
/**
* Retrieve the user presences (a map from resource to {@link Presence}) for a given XMPP entity represented by their bare JID.
*
* @param entity the entity
* @return the user presences
*/
private synchronized Map<Resourcepart, Presence> getOrCreatePresencesInternal(BareJid entity) {
Map<Resourcepart, Presence> entityPresences = getPresencesInternal(entity);
if (entityPresences == null) {
if (contains(entity)) {
entityPresences = new ConcurrentHashMap<>();
presenceMap.put(entity, entityPresences);
}
else {
LruCache<Resourcepart, Presence> nonRosterEntityPresences = new LruCache<>(32);
nonRosterPresenceMap.put(entity, nonRosterEntityPresences);
entityPresences = nonRosterEntityPresences;
}
}
return entityPresences;
}
/**
* Returns the subscription processing mode, which dictates what action
* Smack will take when subscription requests from other users are made.
* The default subscription mode is {@link SubscriptionMode#reject_all}.
* <p>
* If using the manual mode, a PacketListener should be registered that
* listens for Presence packets that have a type of
* {@link org.jivesoftware.smack.packet.Presence.Type#subscribe}.
* </p>
*
* @return the subscription mode.
*/
public SubscriptionMode getSubscriptionMode() {
return subscriptionMode;
}
/**
* Sets the subscription processing mode, which dictates what action
* Smack will take when subscription requests from other users are made.
* The default subscription mode is {@link SubscriptionMode#reject_all}.
* <p>
* If using the manual mode, a PacketListener should be registered that
* listens for Presence packets that have a type of
* {@link org.jivesoftware.smack.packet.Presence.Type#subscribe}.
* </p>
*
* @param subscriptionMode the subscription mode.
*/
public void setSubscriptionMode(SubscriptionMode subscriptionMode) {
this.subscriptionMode = subscriptionMode;
}
/**
* Reloads the entire roster from the server. This is an asynchronous operation,
* which means the method will return immediately, and the roster will be
* reloaded at a later point when the server responds to the reload request.
* @throws NotLoggedInException If not logged in.
* @throws NotConnectedException if the XMPP connection is not connected.
* @throws InterruptedException if the calling thread was interrupted.
*/
public void reload() throws NotLoggedInException, NotConnectedException, InterruptedException {
final XMPPConnection connection = getAuthenticatedConnectionOrThrow();
RosterPacket packet = new RosterPacket();
if (rosterStore != null && isRosterVersioningSupported()) {
packet.setVersion(rosterStore.getRosterVersion());
}
rosterState = RosterState.loading;
SmackFuture<IQ, Exception> future = connection.sendIqRequestAsync(packet);
future.onSuccess(new RosterResultListener()).onError(new ExceptionCallback<Exception>() {
@Override
public void processException(Exception exception) {
rosterState = RosterState.uninitialized;
Level logLevel = Level.SEVERE;
if (exception instanceof NotConnectedException) {
logLevel = Level.FINE;
} else if (exception instanceof XMPPErrorException) {
Condition condition = ((XMPPErrorException) exception).getStanzaError().getCondition();
if (condition == Condition.feature_not_implemented || condition == Condition.service_unavailable) {
logLevel = Level.FINE;
}
}
LOGGER.log(logLevel, "Exception reloading roster", exception);
for (RosterLoadedListener listener : rosterLoadedListeners) {
listener.onRosterLoadingFailed(exception);
}
}
});
}
/**
* Reload the roster and block until it is reloaded.
*
* @throws NotLoggedInException if the XMPP connection is not authenticated.
* @throws NotConnectedException if the XMPP connection is not connected.
* @throws InterruptedException if the calling thread was interrupted.
* @since 4.1
*/
public void reloadAndWait() throws NotLoggedInException, NotConnectedException, InterruptedException {
reload();
waitUntilLoaded();
}
/**
* Set the roster store, may cause a roster reload.
*
* @param rosterStore TODO javadoc me please
* @return true if the roster reload was initiated, false otherwise.
* @since 4.1
*/
public boolean setRosterStore(RosterStore rosterStore) {
this.rosterStore = rosterStore;
try {
reload();
}
catch (InterruptedException | NotLoggedInException | NotConnectedException e) {
LOGGER.log(Level.FINER, "Could not reload roster", e);
return false;
}
return true;
}
boolean waitUntilLoaded() throws InterruptedException {
long waitTime = connection().getReplyTimeout();
long start = System.currentTimeMillis();
while (!isLoaded()) {
if (waitTime <= 0) {
break;
}
synchronized (this) {
if (!isLoaded()) {
wait(waitTime);
}
}
long now = System.currentTimeMillis();
waitTime -= now - start;
start = now;
}
return isLoaded();
}
/**
* Check if the roster is loaded.
*
* @return true if the roster is loaded.
* @since 4.1
*/
public boolean isLoaded() {
return rosterState == RosterState.loaded;
}
/**
* Adds a listener to this roster. The listener will be fired anytime one or more
* changes to the roster are pushed from the server.
*
* @param rosterListener a roster listener.
* @return true if the listener was not already added.
* @see #getEntriesAndAddListener(RosterListener, RosterEntries)
*/
public boolean addRosterListener(RosterListener rosterListener) {
synchronized (rosterListenersAndEntriesLock) {
return rosterListeners.add(rosterListener);
}
}
/**
* Removes a listener from this roster. The listener will be fired anytime one or more
* changes to the roster are pushed from the server.
*
* @param rosterListener a roster listener.
* @return true if the listener was active and got removed.
*/
public boolean removeRosterListener(RosterListener rosterListener) {
synchronized (rosterListenersAndEntriesLock) {
return rosterListeners.remove(rosterListener);
}
}
/**
* Add a roster loaded listener. Roster loaded listeners are invoked once the {@link Roster}
* was successfully loaded.
*
* @param rosterLoadedListener the listener to add.
* @return true if the listener was not already added.
* @see RosterLoadedListener
* @since 4.1
*/
public boolean addRosterLoadedListener(RosterLoadedListener rosterLoadedListener) {
synchronized (rosterLoadedListener) {
return rosterLoadedListeners.add(rosterLoadedListener);
}
}
/**
* Remove a roster loaded listener.
*
* @param rosterLoadedListener the listener to remove.
* @return true if the listener was active and got removed.
* @see RosterLoadedListener
* @since 4.1
*/
public boolean removeRosterLoadedListener(RosterLoadedListener rosterLoadedListener) {
synchronized (rosterLoadedListener) {
return rosterLoadedListeners.remove(rosterLoadedListener);
}
}
/**
* Add a {@link PresenceEventListener}. Such a listener will be fired whenever certain
* presence events happen.<p>
* Among those events are:
* <ul>
* <li> 'available' presence received
* <li> 'unavailable' presence received
* <li> 'error' presence received
* <li> 'subscribed' presence received
* <li> 'unsubscribed' presence received
* </ul>
* @param presenceEventListener listener to add.
* @return true if the listener was not already added.
*/
public boolean addPresenceEventListener(PresenceEventListener presenceEventListener) {
return presenceEventListeners.add(presenceEventListener);
}
public boolean removePresenceEventListener(PresenceEventListener presenceEventListener) {
return presenceEventListeners.remove(presenceEventListener);
}
/**
* Creates a new group.
* <p>
* Note: you must add at least one entry to the group for the group to be kept
* after a logout/login. This is due to the way that XMPP stores group information.
* </p>
*
* @param name the name of the group.
* @return a new group, or null if the group already exists
*/
public RosterGroup createGroup(String name) {
final XMPPConnection connection = connection();
if (groups.containsKey(name)) {
return groups.get(name);
}
RosterGroup group = new RosterGroup(name, connection);
groups.put(name, group);
return group;
}
/**
* Creates a new roster entry and presence subscription. The server will asynchronously
* update the roster with the subscription status.
*
* @param user the user. (e.g. johndoe@jabber.org)
* @param name the nickname of the user.
* @param groups the list of group names the entry will belong to, or <code>null</code> if the
* the roster entry won't belong to a group.
* @throws NoResponseException if there was no response from the server.
* @throws XMPPErrorException if an XMPP exception occurs.
* @throws NotLoggedInException If not logged in.
* @throws NotConnectedException if the XMPP connection is not connected.
* @throws InterruptedException if the calling thread was interrupted.
* @deprecated use {@link #createItemAndRequestSubscription(BareJid, String, String[])} instead.
*/
// TODO: Remove in Smack 4.5.
@Deprecated
public void createEntry(BareJid user, String name, String[] groups) throws NotLoggedInException, NoResponseException, XMPPErrorException, NotConnectedException, InterruptedException {
createItemAndRequestSubscription(user, name, groups);
}
/**
* Creates a new roster item. The server will asynchronously update the roster with the subscription status.
* <p>
* There will be no presence subscription request. Consider using
* {@link #createItemAndRequestSubscription(BareJid, String, String[])} if you also want to request a presence
* subscription from the contact.
* </p>
*
* @param jid the XMPP address of the contact (e.g. johndoe@jabber.org)
* @param name the nickname of the user.
* @param groups the list of group names the entry will belong to, or <code>null</code> if the roster entry won't
* belong to a group.
* @throws NoResponseException if there was no response from the server.
* @throws XMPPErrorException if an XMPP exception occurs.
* @throws NotLoggedInException If not logged in.
* @throws NotConnectedException if the XMPP connection is not connected.
* @throws InterruptedException if the calling thread was interrupted.
* @since 4.4.0
*/
public void createItem(BareJid jid, String name, String[] groups) throws NotLoggedInException, NoResponseException, XMPPErrorException, NotConnectedException, InterruptedException {
final XMPPConnection connection = getAuthenticatedConnectionOrThrow();
// Create and send roster entry creation packet.
RosterPacket rosterPacket = new RosterPacket();
rosterPacket.setType(IQ.Type.set);
RosterPacket.Item item = new RosterPacket.Item(jid, name);
if (groups != null) {
for (String group : groups) {
if (group != null && group.trim().length() > 0) {
item.addGroupName(group);
}
}
}
rosterPacket.addRosterItem(item);
connection.sendIqRequestAndWaitForResponse(rosterPacket);
}
/**
* Creates a new roster entry and presence subscription. The server will asynchronously
* update the roster with the subscription status.
*
* @param jid the XMPP address of the contact (e.g. johndoe@jabber.org)
* @param name the nickname of the user.
* @param groups the list of group names the entry will belong to, or <code>null</code> if the
* the roster entry won't belong to a group.
* @throws NoResponseException if there was no response from the server.
* @throws XMPPErrorException if an XMPP exception occurs.
* @throws NotLoggedInException If not logged in.
* @throws NotConnectedException if the XMPP connection is not connected.
* @throws InterruptedException if the calling thread was interrupted.
* @since 4.4.0
*/
public void createItemAndRequestSubscription(BareJid jid, String name, String[] groups) throws NotLoggedInException, NoResponseException, XMPPErrorException, NotConnectedException, InterruptedException {
createItem(jid, name, groups);
sendSubscriptionRequest(jid);
}
/**
* Creates a new pre-approved roster entry and presence subscription. The server will
* asynchronously update the roster with the subscription status.
*
* @param user the user. (e.g. johndoe@jabber.org)
* @param name the nickname of the user.
* @param groups the list of group names the entry will belong to, or <code>null</code> if the
* the roster entry won't belong to a group.
* @throws NoResponseException if there was no response from the server.
* @throws XMPPErrorException if an XMPP exception occurs.
* @throws NotLoggedInException if not logged in.
* @throws NotConnectedException if the XMPP connection is not connected.
* @throws InterruptedException if the calling thread was interrupted.
* @throws FeatureNotSupportedException if pre-approving is not supported.
* @since 4.2
*/
public void preApproveAndCreateEntry(BareJid user, String name, String[] groups) throws NotLoggedInException, NoResponseException, XMPPErrorException, NotConnectedException, InterruptedException, FeatureNotSupportedException {
preApprove(user);
createItemAndRequestSubscription(user, name, groups);
}
/**
* Pre-approve user presence subscription.
*
* @param user the user. (e.g. johndoe@jabber.org)
* @throws NotLoggedInException if not logged in.
* @throws NotConnectedException if the XMPP connection is not connected.
* @throws InterruptedException if the calling thread was interrupted.
* @throws FeatureNotSupportedException if pre-approving is not supported.
* @since 4.2
*/
public void preApprove(BareJid user) throws NotLoggedInException, NotConnectedException, InterruptedException, FeatureNotSupportedException {
final XMPPConnection connection = connection();
if (!isSubscriptionPreApprovalSupported()) {
throw new FeatureNotSupportedException("Pre-approving");
}
Presence presencePacket = connection.getStanzaFactory().buildPresenceStanza()
.ofType(Presence.Type.subscribed)
.to(user)
.build();
connection.sendStanza(presencePacket);
}
/**
* Check for subscription pre-approval support.
*
* @return true if subscription pre-approval is supported by the server.
* @throws NotLoggedInException if not logged in.
* @since 4.2
*/
public boolean isSubscriptionPreApprovalSupported() throws NotLoggedInException {
final XMPPConnection connection = getAuthenticatedConnectionOrThrow();
return connection.hasFeature(SubscriptionPreApproval.ELEMENT, SubscriptionPreApproval.NAMESPACE);
}
public void sendSubscriptionRequest(BareJid jid) throws NotLoggedInException, NotConnectedException, InterruptedException {
final XMPPConnection connection = getAuthenticatedConnectionOrThrow();
// Create a presence subscription packet and send.
Presence presencePacket = connection.getStanzaFactory().buildPresenceStanza()
.ofType(Presence.Type.subscribe)
.to(jid)
.build();
connection.sendStanza(presencePacket);
}
/**
* Add a subscribe listener, which is invoked on incoming subscription requests and if
* {@link SubscriptionMode} is set to {@link SubscriptionMode#manual}. This also sets subscription
* mode to {@link SubscriptionMode#manual}.
*
* @param subscribeListener the subscribe listener to add.
* @return <code>true</code> if the listener was not already added.
* @since 4.2
*/
public boolean addSubscribeListener(SubscribeListener subscribeListener) {
Objects.requireNonNull(subscribeListener, "SubscribeListener argument must not be null");
if (subscriptionMode != SubscriptionMode.manual) {
previousSubscriptionMode = subscriptionMode;
subscriptionMode = SubscriptionMode.manual;
}
return subscribeListeners.add(subscribeListener);
}
/**
* Remove a subscribe listener. Also restores the previous subscription mode
* state, if the last listener got removed.
*
* @param subscribeListener TODO javadoc me please
* the subscribe listener to remove.
* @return <code>true</code> if the listener registered and got removed.
* @since 4.2
*/
public boolean removeSubscribeListener(SubscribeListener subscribeListener) {
boolean removed = subscribeListeners.remove(subscribeListener);
if (removed && subscribeListeners.isEmpty()) {
setSubscriptionMode(previousSubscriptionMode);
}
return removed;
}
/**
* Removes a roster entry from the roster. The roster entry will also be removed from the
* unfiled entries or from any roster group where it could belong and will no longer be part
* of the roster. Note that this is a synchronous call -- Smack must wait for the server
* to send an updated subscription status.
*
* @param entry a roster entry.
* @throws XMPPErrorException if an XMPP error occurs.
* @throws NotLoggedInException if not logged in.
* @throws NoResponseException SmackException if there was no response from the server.
* @throws NotConnectedException if the XMPP connection is not connected.
* @throws InterruptedException if the calling thread was interrupted.
*/
public void removeEntry(RosterEntry entry) throws NotLoggedInException, NoResponseException, XMPPErrorException, NotConnectedException, InterruptedException {
final XMPPConnection connection = getAuthenticatedConnectionOrThrow();
// Only remove the entry if it's in the entry list.
// The actual removal logic takes place in RosterPacketListenerProcess>>Packet(Packet)
if (!entries.containsKey(entry.getJid())) {
return;
}
RosterPacket packet = new RosterPacket();
packet.setType(IQ.Type.set);
RosterPacket.Item item = RosterEntry.toRosterItem(entry);
// Set the item type as REMOVE so that the server will delete the entry
item.setItemType(RosterPacket.ItemType.remove);
packet.addRosterItem(item);
connection.sendIqRequestAndWaitForResponse(packet);
}
/**
* Returns a count of the entries in the roster.
*
* @return the number of entries in the roster.
*/
public int getEntryCount() {
return getEntries().size();
}
/**
* Add a roster listener and invoke the roster entries with all entries of the roster.
* <p>
* The method guarantees that the listener is only invoked after
* {@link RosterEntries#rosterEntries(Collection)} has been invoked, and that all roster events
* that happen while <code>rosterEntries(Collection) </code> is called are queued until the
* method returns.
* </p>
* <p>
* This guarantee makes this the ideal method to e.g. populate a UI element with the roster while
* installing a {@link RosterListener} to listen for subsequent roster events.
* </p>
*
* @param rosterListener the listener to install
* @param rosterEntries the roster entries callback interface
* @since 4.1
*/
public void getEntriesAndAddListener(RosterListener rosterListener, RosterEntries rosterEntries) {
Objects.requireNonNull(rosterListener, "listener must not be null");
Objects.requireNonNull(rosterEntries, "rosterEntries must not be null");
synchronized (rosterListenersAndEntriesLock) {
rosterEntries.rosterEntries(entries.values());
addRosterListener(rosterListener);
}
}
/**
* Returns a set of all entries in the roster, including entries
* that don't belong to any groups.
*
* @return all entries in the roster.
*/
public Set<RosterEntry> getEntries() {
Set<RosterEntry> allEntries;
synchronized (rosterListenersAndEntriesLock) {
allEntries = new HashSet<>(entries.size());
for (RosterEntry entry : entries.values()) {
allEntries.add(entry);
}
}
return allEntries;
}
/**
* Returns a count of the unfiled entries in the roster. An unfiled entry is
* an entry that doesn't belong to any groups.
*
* @return the number of unfiled entries in the roster.
*/
public int getUnfiledEntryCount() {
return unfiledEntries.size();
}
/**
* Returns an unmodifiable set for the unfiled roster entries. An unfiled entry is
* an entry that doesn't belong to any groups.
*
* @return the unfiled roster entries.
*/
public Set<RosterEntry> getUnfiledEntries() {
return Collections.unmodifiableSet(unfiledEntries);
}
/**
* Returns the roster entry associated with the given XMPP address or
* <code>null</code> if the user is not an entry in the roster.
*
* @param jid the XMPP address of the user (eg "jsmith@example.com"). The address could be
* in any valid format (e.g. "domain/resource", "user@domain" or "user@domain/resource").
* @return the roster entry or <code>null</code> if it does not exist.
*/
public RosterEntry getEntry(BareJid jid) {
if (jid == null) {
return null;
}
return entries.get(jid);
}
/**
* Returns true if the specified XMPP address is an entry in the roster.
*
* @param jid the XMPP address of the user (eg "jsmith@example.com"). The
* address must be a bare JID e.g. "domain/resource" or
* "user@domain".
* @return true if the XMPP address is an entry in the roster.
*/
public boolean contains(BareJid jid) {
return getEntry(jid) != null;
}
/**
* Returns the roster group with the specified name, or <code>null</code> if the
* group doesn't exist.
*
* @param name the name of the group.
* @return the roster group with the specified name.
*/
public RosterGroup getGroup(String name) {
return groups.get(name);
}
/**
* Returns the number of the groups in the roster.
*
* @return the number of groups in the roster.
*/
public int getGroupCount() {
return groups.size();
}
/**
* Returns an unmodifiable collections of all the roster groups.
*
* @return an iterator for all roster groups.
*/
public Collection<RosterGroup> getGroups() {
return Collections.unmodifiableCollection(groups.values());
}
/**
* Returns the presence info for a particular user. If the user is offline, or
* if no presence data is available (such as when you are not subscribed to the
* user's presence updates), unavailable presence will be returned.
*
* If the user has several presences (one for each resource), then the presence with
* highest priority will be returned. If multiple presences have the same priority,
* the one with the "most available" presence mode will be returned. In order,
* that's {@link org.jivesoftware.smack.packet.Presence.Mode#chat free to chat},
* {@link org.jivesoftware.smack.packet.Presence.Mode#available available},
* {@link org.jivesoftware.smack.packet.Presence.Mode#away away},
* {@link org.jivesoftware.smack.packet.Presence.Mode#xa extended away}, and
* {@link org.jivesoftware.smack.packet.Presence.Mode#dnd do not disturb}.
*
* <p>
* Note that presence information is received asynchronously. So, just after logging
* in to the server, presence values for users in the roster may be unavailable
* even if they are actually online. In other words, the value returned by this
* method should only be treated as a snapshot in time, and may not accurately reflect
* other user's presence instant by instant. If you need to track presence over time,
* such as when showing a visual representation of the roster, consider using a
* {@link RosterListener}.
* </p>
*
* @param jid the XMPP address of the user (eg "jsmith@example.com"). The
* address must be a bare JID e.g. "domain/resource" or
* "user@domain".
* @return the user's current presence, or unavailable presence if the user is offline
* or if no presence information is available..
*/
public Presence getPresence(BareJid jid) {
Map<Resourcepart, Presence> userPresences = getPresencesInternal(jid);
if (userPresences == null) {
Presence presence = synthesizeUnvailablePresence(jid);
return presence;
}
else {
// Find the resource with the highest priority
// Might be changed to use the resource with the highest availability instead.
Presence presence = null;
// This is used in case no available presence is found
Presence unavailable = null;
for (Presence p : userPresences.values()) {
if (!p.isAvailable()) {
unavailable = p;
continue;
}
// Chose presence with highest priority first.
if (presence == null || p.getPriority() > presence.getPriority()) {
presence = p;
}
// If equal priority, choose "most available" by the mode value.
else if (p.getPriority() == presence.getPriority()) {
Presence.Mode pMode = p.getMode();
// Default to presence mode of available.
if (pMode == null) {
pMode = Presence.Mode.available;
}
Presence.Mode presenceMode = presence.getMode();
// Default to presence mode of available.
if (presenceMode == null) {
presenceMode = Presence.Mode.available;
}
if (pMode.compareTo(presenceMode) < 0) {
presence = p;
}
}
}
if (presence == null) {
if (unavailable != null) {
return unavailable;
}
else {
presence = synthesizeUnvailablePresence(jid);
return presence;
}
}
else {
return presence;
}
}
}
/**
* Returns the presence info for a particular user's resource, or unavailable presence
* if the user is offline or if no presence information is available, such as
* when you are not subscribed to the user's presence updates.
*
* @param userWithResource a fully qualified XMPP ID including a resource (user@domain/resource).
* @return the user's current presence, or unavailable presence if the user is offline
* or if no presence information is available.
*/
public Presence getPresenceResource(FullJid userWithResource) {
BareJid key = userWithResource.asBareJid();
Resourcepart resource = userWithResource.getResourcepart();
Map<Resourcepart, Presence> userPresences = getPresencesInternal(key);
if (userPresences == null) {
Presence presence = synthesizeUnvailablePresence(userWithResource);
return presence;
}
else {
Presence presence = userPresences.get(resource);
if (presence == null) {
presence = synthesizeUnvailablePresence(userWithResource);
return presence;
}
else {
return presence;
}
}
}
/**
* Returns a List of Presence objects for all of a user's current presences if no presence information is available,
* such as when you are not subscribed to the user's presence updates.
*
* @param bareJid an XMPP ID, e.g. jdoe@example.com.
* @return a List of Presence objects for all the user's current presences, or an unavailable presence if no
* presence information is available.
*/
public List<Presence> getAllPresences(BareJid bareJid) {
Map<Resourcepart, Presence> userPresences = getPresencesInternal(bareJid);
List<Presence> res;
if (userPresences == null) {
// Create an unavailable presence if none was found
Presence unavailable = synthesizeUnvailablePresence(bareJid);
res = new ArrayList<>(Arrays.asList(unavailable));
} else {
res = new ArrayList<>(userPresences.values().size());
for (Presence presence : userPresences.values()) {
res.add(presence);
}
}
return res;
}
/**
* Returns a List of all <b>available</b> Presence Objects for the given bare JID. If there are no available
* presences, then the empty list will be returned.
*
* @param bareJid the bare JID from which the presences should be retrieved.
* @return available presences for the bare JID.
*/
public List<Presence> getAvailablePresences(BareJid bareJid) {
List<Presence> allPresences = getAllPresences(bareJid);
List<Presence> res = new ArrayList<>(allPresences.size());
for (Presence presence : allPresences) {
if (presence.isAvailable()) {
// No need to clone presence here, getAllPresences already returns clones
res.add(presence);
}
}
return res;
}
/**
* Returns a List of Presence objects for all of a user's current presences
* or an unavailable presence if the user is unavailable (offline) or if no presence
* information is available, such as when you are not subscribed to the user's presence
* updates.
*
* @param jid an XMPP ID, e.g. jdoe@example.com.
* @return a List of Presence objects for all the user's current presences,
* or an unavailable presence if the user is offline or if no presence information
* is available.
*/
public List<Presence> getPresences(BareJid jid) {
List<Presence> res;
Map<Resourcepart, Presence> userPresences = getPresencesInternal(jid);
if (userPresences == null) {
Presence presence = synthesizeUnvailablePresence(jid);
res = Arrays.asList(presence);
}
else {
List<Presence> answer = new ArrayList<>();
// Used in case no available presence is found
Presence unavailable = null;
for (Presence presence : userPresences.values()) {
if (presence.isAvailable()) {
answer.add(presence);
}
else {
unavailable = presence;
}
}
if (!answer.isEmpty()) {
res = answer;
}
else if (unavailable != null) {
res = Arrays.asList(unavailable);
}
else {
Presence presence = synthesizeUnvailablePresence(jid);
res = Arrays.asList(presence);
}
}
return res;
}
/**
* Check if the given JID is subscribed to the user's presence.
* <p>
* If the JID is subscribed to the user's presence then it is allowed to see the presence and
* will get notified about presence changes. Also returns true, if the JID is the service
* name of the XMPP connection (the "XMPP domain"), i.e. the XMPP service is treated like
* having an implicit subscription to the users presence.
* </p>
* Note that if the roster is not loaded, then this method will always return false.
*
* @param jid TODO javadoc me please
* @return true if the given JID is allowed to see the users presence.
* @since 4.1
*/
public boolean isSubscribedToMyPresence(Jid jid) {
if (jid == null) {
return false;
}
BareJid bareJid = jid.asBareJid();
if (connection().getXMPPServiceDomain().equals(bareJid)) {
return true;
}
RosterEntry entry = getEntry(bareJid);
if (entry == null) {
return false;
}
return entry.canSeeMyPresence();
}
/**
* Check if the XMPP entity this roster belongs to is subscribed to the presence of the given JID.
*
* @param jid the jid to check.
* @return <code>true</code> if we are subscribed to the presence of the given jid.
* @since 4.2
*/
public boolean iAmSubscribedTo(Jid jid) {
if (jid == null) {
return false;
}
BareJid bareJid = jid.asBareJid();
RosterEntry entry = getEntry(bareJid);
if (entry == null) {
return false;
}
return entry.canSeeHisPresence();
}
/**
* Sets if the roster will be loaded from the server when logging in for newly created instances
* of {@link Roster}.
*
* @param rosterLoadedAtLoginDefault if the roster will be loaded from the server when logging in.
* @see #setRosterLoadedAtLogin(boolean)
* @since 4.1.7
*/
public static void setRosterLoadedAtLoginDefault(boolean rosterLoadedAtLoginDefault) {
Roster.rosterLoadedAtLoginDefault = rosterLoadedAtLoginDefault;
}
/**
* Sets if the roster will be loaded from the server when logging in. This
* is the common behaviour for clients but sometimes clients may want to differ this
* or just never do it if not interested in rosters.
*
* @param rosterLoadedAtLogin if the roster will be loaded from the server when logging in.
*/
public void setRosterLoadedAtLogin(boolean rosterLoadedAtLogin) {
this.rosterLoadedAtLogin = rosterLoadedAtLogin;
}
/**
* Returns true if the roster will be loaded from the server when logging in. This
* is the common behavior for clients but sometimes clients may want to differ this
* or just never do it if not interested in rosters.
*
* @return true if the roster will be loaded from the server when logging in.
* @see <a href="http://xmpp.org/rfcs/rfc6121.html#roster-login">RFC 6121 2.2 - Retrieving the Roster on Login</a>
*/
public boolean isRosterLoadedAtLogin() {
return rosterLoadedAtLogin;
}
RosterStore getRosterStore() {
return rosterStore;
}
/**
* Changes the presence of available contacts offline by simulating an unavailable
* presence sent from the server.
*/
private void setOfflinePresences() {
outerloop: for (Jid user : presenceMap.keySet()) {
Map<Resourcepart, Presence> resources = presenceMap.get(user);
if (resources != null) {
for (Resourcepart resource : resources.keySet()) {
PresenceBuilder presenceBuilder = StanzaBuilder.buildPresence()
.ofType(Presence.Type.unavailable);
EntityBareJid bareUserJid = user.asEntityBareJidIfPossible();
if (bareUserJid == null) {
LOGGER.warning("Can not transform user JID to bare JID: '" + user + "'");
continue;
}
presenceBuilder.from(JidCreate.fullFrom(bareUserJid, resource));
try {
presencePacketListener.processStanza(presenceBuilder.build());
}
catch (NotConnectedException e) {
throw new IllegalStateException(
"presencePacketListener should never throw a NotConnectedException when processStanza is called with a presence of type unavailable",
e);
}
catch (InterruptedException e) {
break outerloop;
}
}
}
}
}
/**
* Changes the presence of available contacts offline by simulating an unavailable
* presence sent from the server. After a disconnection, every Presence is set
* to offline.
*/
private void setOfflinePresencesAndResetLoaded() {
setOfflinePresences();
rosterState = RosterState.uninitialized;
}
/**
* Fires roster changed event to roster listeners indicating that the
* specified collections of contacts have been added, updated or deleted
* from the roster.
*
* @param addedEntries the collection of address of the added contacts.
* @param updatedEntries the collection of address of the updated contacts.
* @param deletedEntries the collection of address of the deleted contacts.
*/
private void fireRosterChangedEvent(final Collection<Jid> addedEntries, final Collection<Jid> updatedEntries,
final Collection<Jid> deletedEntries) {
synchronized (rosterListenersAndEntriesLock) {
for (RosterListener listener : rosterListeners) {
if (!addedEntries.isEmpty()) {
listener.entriesAdded(addedEntries);
}
if (!updatedEntries.isEmpty()) {
listener.entriesUpdated(updatedEntries);
}
if (!deletedEntries.isEmpty()) {
listener.entriesDeleted(deletedEntries);
}
}
}
}
/**
* Fires roster presence changed event to roster listeners.
*
* @param presence the presence change.
*/
private void fireRosterPresenceEvent(final Presence presence) {
synchronized (rosterListenersAndEntriesLock) {
for (RosterListener listener : rosterListeners) {
listener.presenceChanged(presence);
}
}
}
private void addUpdateEntry(Collection<Jid> addedEntries, Collection<Jid> updatedEntries,
Collection<Jid> unchangedEntries, RosterPacket.Item item, RosterEntry entry) {
RosterEntry oldEntry;
synchronized (rosterListenersAndEntriesLock) {
oldEntry = entries.put(item.getJid(), entry);
}
if (oldEntry == null) {
BareJid jid = item.getJid();
addedEntries.add(jid);
// Move the eventually existing presences from nonRosterPresenceMap to presenceMap.
move(jid, nonRosterPresenceMap, presenceMap);
}
else {
RosterPacket.Item oldItem = RosterEntry.toRosterItem(oldEntry);
if (!oldEntry.equalsDeep(entry) || !item.getGroupNames().equals(oldItem.getGroupNames())) {
updatedEntries.add(item.getJid());
oldEntry.updateItem(item);
} else {
// Record the entry as unchanged, so that it doesn't end up as deleted entry
unchangedEntries.add(item.getJid());
}
}
// Mark the entry as unfiled if it does not belong to any groups.
if (item.getGroupNames().isEmpty()) {
unfiledEntries.add(entry);
}
else {
unfiledEntries.remove(entry);
}
// Add the entry/user to the groups
List<String> newGroupNames = new ArrayList<>();
for (String groupName : item.getGroupNames()) {
// Add the group name to the list.
newGroupNames.add(groupName);
// Add the entry to the group.
RosterGroup group = getGroup(groupName);
if (group == null) {
group = createGroup(groupName);
groups.put(groupName, group);
}
// Add the entry.
group.addEntryLocal(entry);
}
// Remove user from the remaining groups.
List<String> oldGroupNames = new ArrayList<>();
for (RosterGroup group : getGroups()) {
oldGroupNames.add(group.getName());
}
oldGroupNames.removeAll(newGroupNames);
for (String groupName : oldGroupNames) {
RosterGroup group = getGroup(groupName);
group.removeEntryLocal(entry);
if (group.getEntryCount() == 0) {
groups.remove(groupName);
}
}
}
private void deleteEntry(Collection<Jid> deletedEntries, RosterEntry entry) {
BareJid user = entry.getJid();
entries.remove(user);
unfiledEntries.remove(entry);
// Move the presences from the presenceMap to the nonRosterPresenceMap.
move(user, presenceMap, nonRosterPresenceMap);
deletedEntries.add(user);
for (Map.Entry<String, RosterGroup> e : groups.entrySet()) {
RosterGroup group = e.getValue();
group.removeEntryLocal(entry);
if (group.getEntryCount() == 0) {
groups.remove(e.getKey());
}
}
}
/**
* Removes all the groups with no entries.
*
* This is used by {@link RosterPushListener} and {@link RosterResultListener} to
* cleanup groups after removing contacts.
*/
private void removeEmptyGroups() {
// We have to do this because RosterGroup.removeEntry removes the entry immediately
// (locally) and the group could remain empty.
// TODO Check the performance/logic for rosters with large number of groups
for (RosterGroup group : getGroups()) {
if (group.getEntryCount() == 0) {
groups.remove(group.getName());
}
}
}
/**
* Move presences from 'entity' from one presence map to another.
*
* @param entity the entity
* @param from the map to move presences from
* @param to the map to move presences to
*/
private static void move(BareJid entity, Map<BareJid, Map<Resourcepart, Presence>> from, Map<BareJid, Map<Resourcepart, Presence>> to) {
Map<Resourcepart, Presence> presences = from.remove(entity);
if (presences != null && !presences.isEmpty()) {
to.put(entity, presences);
}
}
/**
* Ignore ItemTypes as of RFC 6121, 2.1.2.5.
*
* This is used by {@link RosterPushListener} and {@link RosterResultListener}.
* */
private static boolean hasValidSubscriptionType(RosterPacket.Item item) {
switch (item.getItemType()) {
case none:
case from:
case to:
case both:
return true;
default:
return false;
}
}
private static Presence synthesizeUnvailablePresence(Jid from) {
return StanzaBuilder.buildPresence()
.ofType(Presence.Type.unavailable)
.from(from)
.build();
}
/**
* Check if the server supports roster versioning.
*
* @return true if the server supports roster versioning, false otherwise.
*/
public boolean isRosterVersioningSupported() {
return connection().hasFeature(RosterVer.ELEMENT, RosterVer.NAMESPACE);
}
/**
* An enumeration for the subscription mode options.
*/
public enum SubscriptionMode {
/**
* Automatically accept all subscription and unsubscription requests.
* This is suitable for simple clients. More complex clients will
* likely wish to handle subscription requests manually.
*/
accept_all,
/**
* Automatically reject all subscription requests. This is the default mode.
*/
reject_all,
/**
* Subscription requests are ignored, which means they must be manually
* processed by registering a listener for presence packets and then looking
* for any presence requests that have the type Presence.Type.SUBSCRIBE or
* Presence.Type.UNSUBSCRIBE.
*/
manual
}
/**
* Listens for all presence packets and processes them.
*/
private class PresencePacketListener implements StanzaListener {
@Override
public void processStanza(Stanza packet) throws NotConnectedException, InterruptedException {
// Try to ensure that the roster is loaded when processing presence stanzas. While the
// presence listener is synchronous, the roster result listener is not, which means that
// the presence listener may be invoked with a not yet loaded roster.
if (rosterState == RosterState.loading) {
try {
waitUntilLoaded();
}
catch (InterruptedException e) {
LOGGER.log(Level.INFO, "Presence listener was interrupted", e);
}
}
final Jid from = packet.getFrom();
if (!isLoaded() && rosterLoadedAtLogin) {
XMPPConnection connection = connection();
// Only log the warning, if this is not the reflected self-presence. Otherwise,
// the reflected self-presence may cause a spurious warning in case the
// connection got quickly shut down. See SMACK-941.
if (connection != null && from != null && !from.equals(connection.getUser())) {
LOGGER.warning("Roster not loaded while processing " + packet);
}
}
final Presence presence = (Presence) packet;
final BareJid key;
if (from != null) {
key = from.asBareJid();
} else {
XMPPConnection connection = connection();
if (connection == null) {
LOGGER.finest("Connection was null while trying to handle exotic presence stanza: " + presence);
return;
}
// Assume the presence come "from the users account on the server" since no from was set (RFC 6120 §
// 8.1.2.1 4.). Note that getUser() may return null, but should never return null in this case as where
// connected.
EntityFullJid myJid = connection.getUser();
if (myJid == null) {
LOGGER.info(
"Connection had no local address in Roster's presence listener."
+ " Possibly we received a presence without from before being authenticated."
+ " Presence: " + presence);
return;
}
LOGGER.info("Exotic presence stanza without from received: " + presence);
key = myJid.asBareJid();
}
asyncButOrdered.performAsyncButOrdered(key, new Runnable() {
@Override
public void run() {
Resourcepart fromResource = Resourcepart.EMPTY;
BareJid bareFrom = null;
FullJid fullFrom = null;
if (from != null) {
fromResource = from.getResourceOrNull();
if (fromResource == null) {
fromResource = Resourcepart.EMPTY;
bareFrom = from.asBareJid();
}
else {
fullFrom = from.asFullJidIfPossible();
// We know that this must be a full JID in this case.
assert fullFrom != null;
}
}
Map<Resourcepart, Presence> userPresences;
// If an "available" presence, add it to the presence map. Each presence
// map will hold for a particular user a map with the presence
// packets saved for each resource.
switch (presence.getType()) {
case available:
// Get the user presence map
userPresences = getOrCreatePresencesInternal(key);
// See if an offline presence was being stored in the map. If so, remove
// it since we now have an online presence.
userPresences.remove(Resourcepart.EMPTY);
// Add the new presence, using the resources as a key.
userPresences.put(fromResource, presence);
// If the user is in the roster, fire an event.
if (contains(key)) {
fireRosterPresenceEvent(presence);
}
for (PresenceEventListener presenceEventListener : presenceEventListeners) {
presenceEventListener.presenceAvailable(fullFrom, presence);
}
break;
// If an "unavailable" packet.
case unavailable:
// If no resource, this is likely an offline presence as part of
// a roster presence flood. In that case, we store it.
userPresences = getOrCreatePresencesInternal(key);
if (from.hasNoResource()) {
// Get the user presence map
userPresences.put(Resourcepart.EMPTY, presence);
}
// Otherwise, this is a normal offline presence.
else {
// Store the offline presence, as it may include extra information
// such as the user being on vacation.
userPresences.put(fromResource, presence);
}
// If the user is in the roster, fire an event.
if (contains(key)) {
fireRosterPresenceEvent(presence);
}
// Ensure that 'from' is a full JID before invoking the presence unavailable
// listeners. Usually unavailable presences always have a resourcepart, i.e. are
// full JIDs, but RFC 6121 § 4.5.4 has an implementation note that unavailable
// presences from a bare JID SHOULD be treated as applying to all resources. I don't
// think any client or server ever implemented that, I do think that this
// implementation note is a terrible idea since it adds another corner case in
// client code, instead of just having the invariant
// "unavailable presences are always from the full JID".
if (fullFrom != null) {
for (PresenceEventListener presenceEventListener : presenceEventListeners) {
presenceEventListener.presenceUnavailable(fullFrom, presence);
}
} else {
LOGGER.fine("Unavailable presence from bare JID: " + presence);
}
break;
// Error presence packets from a bare JID mean we invalidate all existing
// presence info for the user.
case error:
// No need to act on error presences send without from, i.e.
// directly send from the users XMPP service, or where the from
// address is not a bare JID
if (from == null || !from.isEntityBareJid()) {
break;
}
userPresences = getOrCreatePresencesInternal(key);
// Any other presence data is invalidated by the error packet.
userPresences.clear();
// Set the new presence using the empty resource as a key.
userPresences.put(Resourcepart.EMPTY, presence);
// If the user is in the roster, fire an event.
if (contains(key)) {
fireRosterPresenceEvent(presence);
}
for (PresenceEventListener presenceEventListener : presenceEventListeners) {
presenceEventListener.presenceError(from, presence);
}
break;
case subscribed:
for (PresenceEventListener presenceEventListener : presenceEventListeners) {
presenceEventListener.presenceSubscribed(bareFrom, presence);
}
break;
case unsubscribed:
for (PresenceEventListener presenceEventListener : presenceEventListeners) {
presenceEventListener.presenceUnsubscribed(bareFrom, presence);
}
break;
default:
break;
}
}
});
}
}
/**
* Handles Roster results as described in <a href="https://tools.ietf.org/html/rfc6121#section-2.1.4">RFC 6121 2.1.4</a>.
*/
private class RosterResultListener implements SuccessCallback<IQ> {
@Override
public void onSuccess(IQ packet) {
final XMPPConnection connection = connection();
LOGGER.log(Level.FINE, "RosterResultListener received {0}", packet);
Collection<Jid> addedEntries = new ArrayList<>();
Collection<Jid> updatedEntries = new ArrayList<>();
Collection<Jid> deletedEntries = new ArrayList<>();
Collection<Jid> unchangedEntries = new ArrayList<>();
if (packet instanceof RosterPacket) {
// Non-empty roster result. This stanza contains all the roster elements.
RosterPacket rosterPacket = (RosterPacket) packet;
// Ignore items without valid subscription type
ArrayList<Item> validItems = new ArrayList<>();
for (RosterPacket.Item item : rosterPacket.getRosterItems()) {
if (hasValidSubscriptionType(item)) {
validItems.add(item);
}
}
for (RosterPacket.Item item : validItems) {
RosterEntry entry = new RosterEntry(item, Roster.this, connection);
addUpdateEntry(addedEntries, updatedEntries, unchangedEntries, item, entry);
}
// Delete all entries which where not added or updated
Set<Jid> toDelete = new HashSet<>();
for (RosterEntry entry : entries.values()) {
toDelete.add(entry.getJid());
}
toDelete.removeAll(addedEntries);
toDelete.removeAll(updatedEntries);
toDelete.removeAll(unchangedEntries);
for (Jid user : toDelete) {
deleteEntry(deletedEntries, entries.get(user));
}
if (rosterStore != null) {
String version = rosterPacket.getVersion();
rosterStore.resetEntries(validItems, version);
}
removeEmptyGroups();
}
else {
// Empty roster result as defined in RFC6121 2.6.3. An empty roster result basically
// means that rosterver was used and the roster hasn't changed (much) since the
// version we presented the server. So we simply load the roster from the store and
// await possible further roster pushes.
List<RosterPacket.Item> storedItems = rosterStore.getEntries();
if (storedItems == null) {
// The roster store was corrupted. Reset the store and reload the roster without using a roster version.
rosterStore.resetStore();
try {
reload();
} catch (NotLoggedInException | NotConnectedException
| InterruptedException e) {
LOGGER.log(Level.FINE,
"Exception while trying to load the roster after the roster store was corrupted",
e);
}
return;
}
for (RosterPacket.Item item : storedItems) {
RosterEntry entry = new RosterEntry(item, Roster.this, connection);
addUpdateEntry(addedEntries, updatedEntries, unchangedEntries, item, entry);
}
}
rosterState = RosterState.loaded;
synchronized (Roster.this) {
Roster.this.notifyAll();
}
// Fire event for roster listeners.
fireRosterChangedEvent(addedEntries, updatedEntries, deletedEntries);
// Call the roster loaded listeners after the roster events have been fired. This is
// important because the user may call getEntriesAndAddListener() in onRosterLoaded(),
// and if the order would be the other way around, the roster listener added by
// getEntriesAndAddListener() would be invoked with information that was already
// available at the time getEntriesAndAddListener() was called.
try {
synchronized (rosterLoadedListeners) {
for (RosterLoadedListener rosterLoadedListener : rosterLoadedListeners) {
rosterLoadedListener.onRosterLoaded(Roster.this);
}
}
}
catch (Exception e) {
LOGGER.log(Level.WARNING, "RosterLoadedListener threw exception", e);
}
}
}
/**
* Listens for all roster pushes and processes them.
*/
private final class RosterPushListener extends AbstractIqRequestHandler {
private RosterPushListener() {
super(RosterPacket.ELEMENT, RosterPacket.NAMESPACE, IQ.Type.set, Mode.sync);
}
@Override
public IQ handleIQRequest(IQ iqRequest) {
final XMPPConnection connection = connection();
RosterPacket rosterPacket = (RosterPacket) iqRequest;
EntityFullJid ourFullJid = connection.getUser();
if (ourFullJid == null) {
LOGGER.warning("Ignoring roster push " + iqRequest + " while " + connection
+ " has no bound resource. This may be a server bug.");
return null;
}
// Roster push (RFC 6121, 2.1.6)
// A roster push with a non-empty from not matching our address MUST be ignored
EntityBareJid ourBareJid = ourFullJid.asEntityBareJid();
Jid from = rosterPacket.getFrom();
if (from != null) {
if (from.equals(ourFullJid)) {
// Since RFC 6121 roster pushes are no longer allowed to
// origin from the full JID as it was the case with RFC
// 3921. Log a warning an continue processing the push.
// See also SMACK-773.
LOGGER.warning(
"Received roster push from full JID. This behavior is since RFC 6121 not longer standard compliant. "
+ "Please ask your server vendor to fix this and comply to RFC 6121 § 2.1.6. IQ roster push stanza: "
+ iqRequest);
} else if (!from.equals(ourBareJid)) {
LOGGER.warning("Ignoring roster push with a non matching 'from' ourJid='" + ourBareJid + "' from='"
+ from + "'");
return IQ.createErrorResponse(iqRequest, Condition.service_unavailable);
}
}
// A roster push must contain exactly one entry
Collection<Item> items = rosterPacket.getRosterItems();
if (items.size() != 1) {
LOGGER.warning("Ignoring roster push with not exactly one entry. size=" + items.size());
return IQ.createErrorResponse(iqRequest, Condition.bad_request);
}
Collection<Jid> addedEntries = new ArrayList<>();
Collection<Jid> updatedEntries = new ArrayList<>();
Collection<Jid> deletedEntries = new ArrayList<>();
Collection<Jid> unchangedEntries = new ArrayList<>();
// We assured above that the size of items is exactly 1, therefore we are able to
// safely retrieve this single item here.
Item item = items.iterator().next();
RosterEntry entry = new RosterEntry(item, Roster.this, connection);
String version = rosterPacket.getVersion();
if (item.getItemType().equals(RosterPacket.ItemType.remove)) {
deleteEntry(deletedEntries, entry);
if (rosterStore != null) {
rosterStore.removeEntry(entry.getJid(), version);
}
}
else if (hasValidSubscriptionType(item)) {
addUpdateEntry(addedEntries, updatedEntries, unchangedEntries, item, entry);
if (rosterStore != null) {
rosterStore.addEntry(item, version);
}
}
removeEmptyGroups();
// Fire event for roster listeners.
fireRosterChangedEvent(addedEntries, updatedEntries, deletedEntries);
return IQ.createResultIQ(rosterPacket);
}
}
/**
* Set the default maximum size of the non-Roster presence map.
* <p>
* The roster will only store this many presence entries for entities non in the Roster. The
* default is {@value #INITIAL_DEFAULT_NON_ROSTER_PRESENCE_MAP_SIZE}.
* </p>
*
* @param maximumSize the maximum size
* @since 4.2
*/
public static void setDefaultNonRosterPresenceMapMaxSize(int maximumSize) {
defaultNonRosterPresenceMapMaxSize = maximumSize;
}
/**
* Set the maximum size of the non-Roster presence map.
*
* @param maximumSize TODO javadoc me please
* @since 4.2
* @see #setDefaultNonRosterPresenceMapMaxSize(int)
*/
public void setNonRosterPresenceMapMaxSize(int maximumSize) {
nonRosterPresenceMap.setMaxCacheSize(maximumSize);
}
}