com.kixeye.kixmpp.client.module.presence.PresenceKixmppClientModule.java Source code

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Here is the source code for com.kixeye.kixmpp.client.module.presence.PresenceKixmppClientModule.java

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package com.kixeye.kixmpp.client.module.presence;

/*
 * #%L
 * KIXMPP
 * %%
 * Copyright (C) 2014 KIXEYE, Inc
 * %%
 * 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.
 * #L%
 */

import io.netty.channel.Channel;

import java.util.Collections;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;

import org.jdom2.Element;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.kixeye.kixmpp.KixmppJid;
import com.kixeye.kixmpp.client.KixmppClient;
import com.kixeye.kixmpp.client.module.KixmppClientModule;
import com.kixeye.kixmpp.handler.KixmppStanzaHandler;

/**
 * A module that handles presence info.
 * 
 * @author ebahtijaragic
 */
public class PresenceKixmppClientModule implements KixmppClientModule {
    private static final Logger logger = LoggerFactory.getLogger(PresenceKixmppClientModule.class);

    private Set<PresenceListener> presenceListeners = Collections
            .newSetFromMap(new ConcurrentHashMap<PresenceListener, Boolean>());

    private KixmppClient client = null;

    /**
     * @param listener the listener to add
     */
    public void addPresenceListener(PresenceListener listener) {
        presenceListeners.add(listener);
    }

    /**
     * @param listener the listener to remove
     */
    public void removePresenceListener(PresenceListener listener) {
        presenceListeners.remove(listener);
    }

    /**
     * @see com.kixeye.kixmpp.client.module.KixmppClientModule#install(com.kixeye.kixmpp.client.KixmppClient)
     */
    public void install(KixmppClient client) {
        this.client = client;

        client.getEventEngine().registerGlobalStanzaHandler("presence", presenceHandler);
    }

    /**
     * @see com.kixeye.kixmpp.client.module.KixmppClientModule#uninstall(com.kixeye.kixmpp.client.KixmppClient)
     */
    public void uninstall(KixmppClient client) {
        client.getEventEngine().unregisterGlobalStanzaHandler("presence", presenceHandler);
    }

    /**
     * Updates the current user's presence.
     *     
     * @param presence
     */
    public void updatePresence(Presence presence) {
        Element presenceElement = new Element("presence");

        if (presence.getType() != null) {
            presenceElement.setAttribute("type", presence.getType());
        }

        if (presence.getStatus() != null) {
            Element statusElement = new Element("status");
            statusElement.setText(presence.getStatus());

            presenceElement.addContent(statusElement);
        }

        if (presence.getShow() != null) {
            Element showElement = new Element("show");
            showElement.setText(presence.getShow());

            presenceElement.addContent(showElement);
        }

        client.sendStanza(presenceElement);
    }

    private KixmppStanzaHandler presenceHandler = new KixmppStanzaHandler() {
        public void handle(Channel channel, Element stanza) {
            Presence presence = new Presence(KixmppJid.fromRawJid(stanza.getAttributeValue("from")),
                    KixmppJid.fromRawJid(stanza.getAttributeValue("to")), stanza.getAttributeValue("type"),
                    stanza.getChildText("status", stanza.getNamespace()),
                    stanza.getChildText("show", stanza.getNamespace()));

            for (PresenceListener listener : presenceListeners) {
                try {
                    listener.handle(presence);
                } catch (Exception e) {
                    logger.error("Exception thrown while executing Presence listener", e);
                }
            }
        }
    };
}