Examples of rocks.xmpp.core.stanza.model.AbstractPresence

rocks.xmpp.core.stanza.model.AbstractPresence
org/rfcs/rfc6121.html#presence-fundamentals">4.1. Presence Fundamentals

The concept of presence refers to an entity's availability for communication over a network. At the most basic level, presence is a boolean "on/off" variable that signals whether an entity is available or unavailable for communication (the terms "online" and "offline" are also used). In XMPP, an entity's availability is signaled when its client generates a {@code } stanza with no 'type' attribute, and an entity's lack of availability is signaled when its client generates a {@code } stanza whose 'type' attribute has a value of "unavailable".
XMPP presence typically follows a "publish-subscribe" or "observer" pattern, wherein an entity sends presence to its server, and its server then broadcasts that information to all of the entity's contacts who have a subscription to the entity's presence (in the terminology of [IMP-MODEL], an entity that generates presence is a "presentity" and the entities that receive presence are "subscribers"). A client generates presence for broadcast to all subscribed entities by sending a presence stanza to its server with no 'to' address, where the presence stanza has either no 'type' attribute or a 'type' attribute whose value is "unavailable". This kind of presence is called "broadcast presence".

After a client completes the preconditions specified in [XMPP-CORE], it can establish a "presence session" at its server by sending initial presence, where the presence session is terminated by sending unavailable presence. For the duration of its presence session, a connected resource (in the terminology of [XMPP-CORE]) is said to be an "available resource".

In XMPP, applications that combine messaging and presence functionality, the default type of communication for which presence signals availability is messaging; however, it is not necessary for XMPP applications to combine messaging and presence functionality, and they can provide standalone presence features without messaging (in addition, XMPP servers do not require information about network availability in order to successfully route message and IQ stanzas).
Please also refer to 4.7. Presence Syntax. @author Christian Schudt

        xmppSession.addPresenceListener(new PresenceListener() {
            @Override
            public void handle(PresenceEvent e) {
                if (e.isIncoming()) {
                    // A client SHOULD "unlock" after having received a <message/> or <presence/> stanza from any other resource controlled by the peer (or a presence stanza from the locked resource); as a result, it SHOULD address its next message(s) in the chat session to the bare JID of the peer (thus "unlocking" the previous "lock") until it receives a message from one of the peer's full JIDs.
                    AbstractPresence presence = e.getPresence();
                    synchronized (chatSessions) {
                        Jid contact = presence.getFrom().asBareJid();
                        if (chatSessions.containsKey(contact)) {
                            for (ChatSession chatSession : chatSessions.get(contact).values()) {
                                chatSession.chatPartner = contact;
                            }
                        }

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        });
        xmppSession.addPresenceListener(new PresenceListener() {
            @Override
            public void handle(PresenceEvent e) {
                if (!e.isIncoming() && isEnabled()) {
                    AbstractPresence presence = e.getPresence();
                    if (presence.getTo() == null) {
                        synchronized (LastActivityManager.this) {
                            // If an available presence with <show/> value 'away' or 'xa' is sent, append last activity information.
                            if (lastActivityStrategy != null && lastActivityStrategy.getLastActivity() != null && presence.isAvailable() && (presence.getShow() == AbstractPresence.Show.AWAY || presence.getShow() == AbstractPresence.Show.XA) && presence.getExtension(LastActivity.class) == null) {
                                presence.getExtensions().add(new LastActivity(getSecondsSince(lastActivityStrategy.getLastActivity()), presence.getStatus()));
                            }
                        }
                    }
                }
            }

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                }
            });
            xmppSession.addPresenceListener(new PresenceListener() {
                @Override
                public void handle(PresenceEvent e) {
                    AbstractPresence presence = e.getPresence();
                    if (!e.isIncoming() && (!presence.isAvailable() || presence.getShow() != AbstractPresence.Show.AWAY && presence.getShow() != AbstractPresence.Show.XA)) {
                        lastActivity = new Date();
                    }
                }
            });
        }

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        });


        xmppSession.addPresenceListener(new PresenceListener() {
            @Override
            public void handle(PresenceEvent e) {
                AbstractPresence presence = e.getPresence();
                if (e.isIncoming()) {
                    boolean hasReachability = checkStanzaForReachabilityAndNotify(presence);
                    Jid contact = presence.getFrom().asBareJid();
                    if (!hasReachability && reachabilities.remove(contact) != null) {
                        // If no reachability was found in presence, check, if the contact has previously sent any reachability via presence.
                        notifyReachabilityListeners(contact, new ArrayList<Address>());
                    }
                } else {
                    if (presence.isAvailable() && presence.getTo() == null) {
                        synchronized (addresses) {
                            if (!addresses.isEmpty()) {
                                presence.getExtensions().add(new Reachability(new ArrayList<>(addresses)));
                            }
                        }
                    }
                }
            }

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Related Classes of rocks.xmpp.core.stanza.model.AbstractPresence

rocks.xmpp.core.session.ChatManager

rocks.xmpp.extensions.last.LastActivityManager

rocks.xmpp.extensions.last.LastActivityManager$DefaultLastActivityStrategy

rocks.xmpp.extensions.reach.ReachabilityManager

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