| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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.apache.vysper.xmpp.modules.extension.xep0199_xmppping; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import org.apache.vysper.compliance.SpecCompliant; |
| import org.apache.vysper.xmpp.modules.core.base.handler.DefaultIQHandler; |
| import org.apache.vysper.xmpp.protocol.NamespaceURIs; |
| import org.apache.vysper.xmpp.server.ServerRuntimeContext; |
| import org.apache.vysper.xmpp.server.SessionContext; |
| import org.apache.vysper.xmpp.stanza.IQStanza; |
| import org.apache.vysper.xmpp.stanza.IQStanzaType; |
| import org.apache.vysper.xmpp.stanza.Stanza; |
| import org.apache.vysper.xmpp.stanza.StanzaBuilder; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * Implementation of <a href="http://xmpp.org/extensions/xep-0199.html">XEP-0199 XMPP Ping</a>. |
| * |
| * The specification defines several modes, where client to server is currently the only mode |
| * implemented here. An wire protocol example of a client to server ping: |
| * <pre> |
| * C: <iq from='capulet.lit' to='juliet@capulet.lit/balcony' id='s2c1' type='get'> |
| * <ping xmlns='urn:xmpp:ping'/> |
| * </iq> |
| * |
| * S: <iq from='juliet@capulet.lit/balcony' to='capulet.lit' id='s2c1' type='result'/> |
| * </pre> |
| * |
| * @author The Apache MINA Project (dev@mina.apache.org) |
| */ |
| @SpecCompliant(spec = "xep-0199", status = SpecCompliant.ComplianceStatus.IN_PROGRESS, coverage = SpecCompliant.ComplianceCoverage.PARTIAL) |
| public class XmppPingIQHandler extends DefaultIQHandler { |
| |
| private static final Logger LOG = LoggerFactory.getLogger(XmppPingIQHandler.class); |
| |
| private final List<XmppPinger> pingers = new ArrayList<XmppPinger>(); |
| |
| public XmppPingIQHandler() { |
| } |
| |
| @Override |
| public boolean verify(Stanza stanza) { |
| if(stanza == null) return false; |
| |
| boolean extension = super.verify(stanza); |
| if(extension) { |
| return true; |
| } else { |
| // handle result stanzas, which does not contain the extension element |
| String type = stanza.getAttributeValue("type"); |
| if(type != null && type.equals("result")) { |
| String id = stanza.getAttributeValue("id"); |
| if(id != null && id.startsWith("xmppping-")) { |
| return true; |
| } |
| } |
| } |
| |
| return false; |
| } |
| |
| protected void addPinger(XmppPinger pinger) { |
| pingers.add(pinger); |
| } |
| |
| protected void removePinger(XmppPinger pinger) { |
| pingers.remove(pinger); |
| } |
| |
| @Override |
| protected boolean verifyInnerElement(Stanza stanza) { |
| return verifyInnerElementWorker(stanza, "ping") && verifyInnerNamespace(stanza, NamespaceURIs.URN_XMPP_PING); |
| } |
| |
| @Override |
| protected Stanza handleGet(IQStanza stanza, ServerRuntimeContext serverRuntimeContext, SessionContext sessionContext) { |
| |
| StanzaBuilder stanzaBuilder = StanzaBuilder.createIQStanza(stanza.getTo(), stanza.getFrom(), |
| IQStanzaType.RESULT, stanza.getID()); |
| |
| return stanzaBuilder.build(); |
| } |
| |
| @Override |
| protected Stanza handleResult(IQStanza stanza, ServerRuntimeContext serverRuntimeContext, |
| SessionContext sessionContext) { |
| List<XmppPinger> pingersCopy = new ArrayList<XmppPinger>(pingers); |
| for (XmppPinger pinger : pingersCopy) { |
| try { |
| pinger.pong(stanza.getID()); |
| } catch (Throwable e) { |
| LOG.warn("ponging the pinger produced problem: " + e.getMessage()); |
| LOG.debug("ponging the pinger produced problem. ", e); |
| } |
| } |
| |
| return null; |
| } |
| |
| |
| } |