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/**
* $RCSfile$
* $Revision$
* $Date$
*
* Copyright (C) 2004 Jive Software. All rights reserved.
*
* This software is published under the terms of the GNU Public License (GPL),
* a copy of which is included in this distribution.
*/
package org.jivesoftware.messenger;
import org.jivesoftware.messenger.container.BasicModule;
import org.jivesoftware.util.Log;
import org.xmpp.packet.JID;
import org.xmpp.packet.Message;
import org.xmpp.packet.PacketError;
/**
* Controls what is done with offline messages.
*
* @author Iain Shigeoka
*/
public class OfflineMessageStrategy extends BasicModule {
private static int quota = 100*1024; // Default to 100 K.
private static Type type = Type.store_and_bounce;
private SessionManager sessionManager;
private OfflineMessageStore messageStore;
public OfflineMessageStrategy() {
super("Offline Message Strategy");
}
public int getQuota() {
return quota;
}
public void setQuota(int quota) {
OfflineMessageStrategy.quota = quota;
JiveGlobals.setProperty("xmpp.offline.quota", Integer.toString(quota));
}
public OfflineMessageStrategy.Type getType() {
return type;
}
public void setType(OfflineMessageStrategy.Type type) {
if (type == null) {
throw new IllegalArgumentException();
}
OfflineMessageStrategy.type = type;
JiveGlobals.setProperty("xmpp.offline.type", type.toString());
}
public void storeOffline(Message message) {
if (message != null) {
Session senderSession = sessionManager.getSession(message.getFrom());
if (senderSession == null) {
return;
}
JID sender = senderSession.getAddress();
// server messages and anonymous messages can be silently dropped
if (sender == null || sender.getNode() == null) {
// silently drop the server message
}
else {
if (type == Type.bounce) {
bounce(message);
}
else if (type == Type.store) {
store(message);
}
else if (type == Type.store_and_bounce) {
if (underQuota(message)) {
store(message);
}
else {
bounce(message);
}
}
else if (type == Type.store_and_drop) {
if (underQuota(message)) {
store(message);
}
}
}
}
}
private boolean underQuota(Message message) {
return quota > messageStore.getSize(message.getTo().getNode()) + message.toXML().length();
}
private void store(Message message) {
messageStore.addMessage(message);
}
private void bounce(Message message) {
// Generate a rejection response to the sender
try {
Session session = sessionManager.getSession(message.getFrom());
Message errorResponse = message.createCopy();
errorResponse.setError(new PacketError(PacketError.Condition.item_not_found,
PacketError.Type.continue_processing));
session.getConnection().deliver(errorResponse);
}
catch (Exception e) {
Log.error(e);
}
}
public void initialize(XMPPServer server) {
super.initialize(server);
messageStore = server.getOfflineMessageStore();
sessionManager = server.getSessionManager();
String quota = JiveGlobals.getProperty("xmpp.offline.quota");
if (quota != null && quota.length() > 0) {
OfflineMessageStrategy.quota = Integer.parseInt(quota);
}
String type = JiveGlobals.getProperty("xmpp.offline.type");
if (type != null && type.length() > 0) {
OfflineMessageStrategy.type = Type.valueOf(type);
}
}
/**
* Strategy types.
*/
public enum Type {
/**
* All messages are bounced to the sender.
*/
bounce,
/**
* All messages are silently dropped.
*/
drop,
/**
* All messages are stored.
*/
store,
/**
* Messages are stored up to the storage limit, and then bounced.
*/
store_and_bounce,
/**
* Messages are stored up to the storage limit, and then silently dropped.
*/
store_and_drop;
}
}