2 * Copyright (c) 2013 Cisco Systems, Inc. and others. All rights reserved.
4 * This program and the accompanying materials are made available under the
5 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
6 * and is available at http://www.eclipse.org/legal/epl-v10.html
9 package org.opendaylight.controller.netconf.impl;
11 import io.netty.channel.Channel;
12 import io.netty.util.Timer;
13 import io.netty.util.concurrent.Promise;
14 import org.opendaylight.controller.netconf.api.NetconfMessage;
15 import org.opendaylight.controller.netconf.api.NetconfServerSessionPreferences;
16 import org.opendaylight.controller.netconf.impl.mapping.CapabilityProvider;
17 import org.opendaylight.controller.netconf.impl.osgi.NetconfOperationServiceFactoryListener;
18 import org.opendaylight.controller.netconf.impl.util.NetconfUtil;
19 import org.opendaylight.controller.netconf.util.xml.XMLNetconfUtil;
20 import org.opendaylight.controller.netconf.util.xml.XmlNetconfConstants;
21 import org.opendaylight.controller.netconf.util.xml.XmlUtil;
22 import org.opendaylight.protocol.framework.SessionListenerFactory;
23 import org.opendaylight.protocol.framework.SessionNegotiator;
24 import org.opendaylight.protocol.framework.SessionNegotiatorFactory;
25 import org.w3c.dom.Document;
26 import org.w3c.dom.Element;
27 import org.w3c.dom.Node;
29 import javax.xml.xpath.XPathConstants;
30 import javax.xml.xpath.XPathExpression;
32 public class NetconfServerSessionNegotiatorFactory implements SessionNegotiatorFactory {
34 private final Timer timer;
36 private static final Document helloMessageTemplate = loadHelloMessageTemplate();
37 private final SessionIdProvider idProvider;
38 private final NetconfOperationServiceFactoryListener factoriesListener;
40 public NetconfServerSessionNegotiatorFactory(Timer timer, NetconfOperationServiceFactoryListener factoriesListener,
41 SessionIdProvider idProvider) {
43 this.factoriesListener = factoriesListener;
44 this.idProvider = idProvider;
47 private static Document loadHelloMessageTemplate() {
48 return NetconfUtil.createMessage(
49 NetconfServerSessionNegotiatorFactory.class.getResourceAsStream("/server_hello.xml")).getDocument();
53 public SessionNegotiator getSessionNegotiator(SessionListenerFactory sessionListenerFactory, Channel channel,
55 long sessionId = idProvider.getNextSessionId();
57 NetconfServerSessionPreferences proposal = new NetconfServerSessionPreferences(createHelloMessage(sessionId),
59 return new NetconfServerSessionNegotiator(proposal, promise, channel, timer,
60 sessionListenerFactory.getSessionListener());
63 private static final XPathExpression sessionIdXPath = XMLNetconfUtil
64 .compileXPath("/netconf:hello/netconf:session-id");
65 private static final XPathExpression capabilitiesXPath = XMLNetconfUtil
66 .compileXPath("/netconf:hello/netconf:capabilities");
68 private NetconfMessage createHelloMessage(long sessionId) {
69 Document helloMessageTemplate = getHelloTemplateClone();
72 final Node sessionIdNode = (Node) XmlUtil.evaluateXPath(sessionIdXPath, helloMessageTemplate,
74 sessionIdNode.setTextContent(String.valueOf(sessionId));
76 // add capabilities from yang store
77 final Element capabilitiesElement = (Element) XmlUtil.evaluateXPath(capabilitiesXPath, helloMessageTemplate,
80 CapabilityProvider capabilityProvider = new CapabilityProviderImpl(factoriesListener.getSnapshot(sessionId));
82 for (String capability : capabilityProvider.getCapabilities()) {
83 final Element capabilityElement = helloMessageTemplate.createElement(XmlNetconfConstants.CAPABILITY);
84 capabilityElement.setTextContent(capability);
85 capabilitiesElement.appendChild(capabilityElement);
87 return new NetconfMessage(helloMessageTemplate);
90 private synchronized Document getHelloTemplateClone() {
91 return (Document) this.helloMessageTemplate.cloneNode(true);