2 * Copyright (c) 2014 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
8 package org.opendaylight.controller.sal.connect.netconf.schema.mapping;
10 import static org.opendaylight.controller.sal.connect.netconf.util.NetconfMessageTransformUtil.NETCONF_RPC_QNAME;
12 import com.google.common.base.Function;
13 import com.google.common.base.Preconditions;
14 import com.google.common.base.Predicate;
15 import com.google.common.collect.Iterables;
16 import com.google.common.collect.Lists;
17 import com.google.common.collect.Maps;
18 import com.google.common.collect.Multimap;
19 import com.google.common.collect.Multimaps;
20 import java.io.IOException;
21 import java.util.Collection;
22 import java.util.Collections;
23 import java.util.List;
25 import java.util.NoSuchElementException;
27 import javax.xml.stream.XMLStreamException;
28 import javax.xml.stream.XMLStreamWriter;
29 import javax.xml.transform.dom.DOMResult;
30 import org.opendaylight.controller.md.sal.dom.api.DOMRpcResult;
31 import org.opendaylight.controller.md.sal.dom.spi.DefaultDOMRpcResult;
32 import org.opendaylight.controller.netconf.api.NetconfMessage;
33 import org.opendaylight.controller.netconf.util.exception.MissingNameSpaceException;
34 import org.opendaylight.controller.netconf.util.xml.XmlElement;
35 import org.opendaylight.controller.netconf.util.xml.XmlUtil;
36 import org.opendaylight.controller.sal.connect.api.MessageTransformer;
37 import org.opendaylight.controller.sal.connect.netconf.util.NetconfMessageTransformUtil;
38 import org.opendaylight.controller.sal.connect.util.MessageCounter;
39 import org.opendaylight.yangtools.sal.binding.generator.impl.ModuleInfoBackedContext;
40 import org.opendaylight.yangtools.yang.common.QName;
41 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
42 import org.opendaylight.yangtools.yang.data.api.schema.ContainerNode;
43 import org.opendaylight.yangtools.yang.data.api.schema.DataContainerChild;
44 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
45 import org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizedNodeStreamWriter;
46 import org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizedNodeWriter;
47 import org.opendaylight.yangtools.yang.data.impl.codec.xml.XMLStreamNormalizedNodeStreamWriter;
48 import org.opendaylight.yangtools.yang.data.impl.codec.xml.XmlUtils;
49 import org.opendaylight.yangtools.yang.data.impl.schema.Builders;
50 import org.opendaylight.yangtools.yang.data.impl.schema.transform.dom.parser.DomToNormalizedNodeParserFactory;
51 import org.opendaylight.yangtools.yang.model.api.ContainerSchemaNode;
52 import org.opendaylight.yangtools.yang.model.api.NotificationDefinition;
53 import org.opendaylight.yangtools.yang.model.api.RpcDefinition;
54 import org.opendaylight.yangtools.yang.model.api.SchemaContext;
55 import org.opendaylight.yangtools.yang.model.api.SchemaNode;
56 import org.opendaylight.yangtools.yang.model.api.SchemaPath;
57 import org.slf4j.Logger;
58 import org.slf4j.LoggerFactory;
59 import org.w3c.dom.Document;
60 import org.w3c.dom.Element;
62 public class NetconfMessageTransformer implements MessageTransformer<NetconfMessage> {
64 public static final String MESSAGE_ID_PREFIX = "m";
66 private static final Logger LOG= LoggerFactory.getLogger(NetconfMessageTransformer.class);
69 private static final Function<SchemaNode, QName> QNAME_FUNCTION = new Function<SchemaNode, QName>() {
71 public QName apply(final SchemaNode rpcDefinition) {
72 return rpcDefinition.getQName();
76 private static final Function<SchemaNode, QName> QNAME_NOREV_FUNCTION = new Function<SchemaNode, QName>() {
78 public QName apply(final SchemaNode notification) {
79 return QNAME_FUNCTION.apply(notification).withoutRevision();
82 private static final SchemaContext BASE_NETCONF_CTX;
86 final ModuleInfoBackedContext moduleInfoBackedContext = ModuleInfoBackedContext.create();
87 // TODO this should be used only if the base is not present
88 moduleInfoBackedContext.addModuleInfos(
89 Lists.newArrayList(org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.netconf.base._1._0.rev110601.$YangModuleInfoImpl.getInstance()));
90 BASE_NETCONF_CTX = moduleInfoBackedContext.tryToCreateSchemaContext().get();
91 } catch (final RuntimeException e) {
92 LOG.error("Unable to prepare schema context for base netconf ops", e);
93 throw new ExceptionInInitializerError(e);
97 private final SchemaContext schemaContext;
98 private final MessageCounter counter;
99 private final Map<QName, RpcDefinition> mappedRpcs;
100 private final Multimap<QName, NotificationDefinition> mappedNotifications;
101 private final DomToNormalizedNodeParserFactory parserFactory;
103 public NetconfMessageTransformer(final SchemaContext schemaContext) {
104 this.counter = new MessageCounter();
105 this.schemaContext = schemaContext;
106 parserFactory = DomToNormalizedNodeParserFactory.getInstance(XmlUtils.DEFAULT_XML_CODEC_PROVIDER, schemaContext);
108 mappedRpcs = Maps.uniqueIndex(schemaContext.getOperations(), QNAME_FUNCTION);
109 mappedNotifications = Multimaps.index(schemaContext.getNotifications(), QNAME_NOREV_FUNCTION);
113 public synchronized ContainerNode toNotification(final NetconfMessage message) {
114 final XmlElement stripped = stripNotification(message);
115 final QName notificationNoRev;
117 // How to construct QName with no revision ?
118 notificationNoRev = QName.cachedReference(QName.create(stripped.getNamespace(), "0000-00-00", stripped.getName()).withoutRevision());
119 } catch (final MissingNameSpaceException e) {
120 throw new IllegalArgumentException("Unable to parse notification " + message + ", cannot find namespace", e);
123 final Collection<NotificationDefinition> notificationDefinitions = mappedNotifications.get(notificationNoRev);
124 Preconditions.checkArgument(notificationDefinitions.size() > 0,
125 "Unable to parse notification %s, unknown notification. Available notifications: %s", notificationDefinitions, mappedNotifications.keySet());
127 // FIXME if multiple revisions for same notifications are present, we should pick the most recent. Or ?
128 // We should probably just put the most recent notification versions into our map. We can expect that the device sends the data according to the latest available revision of a model.
129 final NotificationDefinition next = notificationDefinitions.iterator().next();
131 // We wrap the notification as a container node in order to reuse the parsers and builders for container node
132 final ContainerSchemaNode notificationAsContainerSchemaNode = NetconfMessageTransformUtil.createSchemaForNotification(next);
133 return parserFactory.getContainerNodeParser().parse(Collections.singleton(stripped.getDomElement()), notificationAsContainerSchemaNode);
136 // FIXME move somewhere to util
137 private static XmlElement stripNotification(final NetconfMessage message) {
138 final XmlElement xmlElement = XmlElement.fromDomDocument(message.getDocument());
139 final List<XmlElement> childElements = xmlElement.getChildElements();
140 Preconditions.checkArgument(childElements.size() == 2, "Unable to parse notification %s, unexpected format", message);
142 return Iterables.find(childElements, new Predicate<XmlElement>() {
144 public boolean apply(final XmlElement xmlElement) {
145 return !xmlElement.getName().equals("eventTime");
148 } catch (final NoSuchElementException e) {
149 throw new IllegalArgumentException("Unable to parse notification " + message + ", cannot strip notification metadata", e);
154 public NetconfMessage toRpcRequest(SchemaPath rpc, final ContainerNode payload) {
155 // In case no input for rpc is defined, we can simply construct the payload here
156 final QName rpcQName = rpc.getLastComponent();
157 Preconditions.checkNotNull(mappedRpcs.get(rpcQName), "Unknown rpc %s, available rpcs: %s", rpcQName, mappedRpcs.keySet());
158 if(mappedRpcs.get(rpcQName).getInput() == null) {
159 final Document document = XmlUtil.newDocument();
160 final Element elementNS = document.createElementNS(rpcQName.getNamespace().toString(), rpcQName.getLocalName());
161 document.appendChild(elementNS);
162 return new NetconfMessage(document);
165 // Set the path to the input of rpc for the node stream writer
166 rpc = rpc.createChild(QName.cachedReference(QName.create(rpcQName, "input")));
167 final DOMResult result = prepareDomResultForRpcRequest(rpcQName);
170 writeNormalizedRpc(payload, result, rpc, schemaContext);
171 } catch (final XMLStreamException | IOException | IllegalStateException e) {
172 throw new IllegalStateException("Unable to serialize " + rpc, e);
175 final Document node = result.getNode().getOwnerDocument();
177 node.getDocumentElement().setAttribute(NetconfMessageTransformUtil.MESSAGE_ID_ATTR, counter.getNewMessageId(MESSAGE_ID_PREFIX));
178 return new NetconfMessage(node);
181 private DOMResult prepareDomResultForRpcRequest(final QName rpcQName) {
182 final Document document = XmlUtil.newDocument();
183 final Element rpcNS = document.createElementNS(NETCONF_RPC_QNAME.getNamespace().toString(), NETCONF_RPC_QNAME.getLocalName());
184 final Element elementNS = document.createElementNS(rpcQName.getNamespace().toString(), rpcQName.getLocalName());
185 rpcNS.appendChild(elementNS);
186 document.appendChild(rpcNS);
187 return new DOMResult(elementNS);
190 private void writeNormalizedRpc(final ContainerNode normalized, final DOMResult result, final SchemaPath schemaPath, final SchemaContext baseNetconfCtx) throws IOException, XMLStreamException {
191 final NormalizedNodeWriter normalizedNodeWriter;
192 NormalizedNodeStreamWriter normalizedNodeStreamWriter = null;
193 XMLStreamWriter writer = null;
195 writer = NetconfMessageTransformUtil.XML_FACTORY.createXMLStreamWriter(result);
196 normalizedNodeStreamWriter = XMLStreamNormalizedNodeStreamWriter.create(writer, baseNetconfCtx, schemaPath);
197 normalizedNodeWriter = NormalizedNodeWriter.forStreamWriter(normalizedNodeStreamWriter);
199 for (final DataContainerChild<? extends YangInstanceIdentifier.PathArgument, ?> editElement : normalized.getValue()) {
200 normalizedNodeWriter.write(editElement);
202 normalizedNodeWriter.flush();
205 if(normalizedNodeStreamWriter != null) {
206 normalizedNodeStreamWriter.close();
211 } catch (final Exception e) {
212 LOG.warn("Unable to close resource properly", e);
218 public synchronized DOMRpcResult toRpcResult(final NetconfMessage message, final SchemaPath rpc) {
219 final NormalizedNode<?, ?> normalizedNode;
220 if (NetconfMessageTransformUtil.isDataRetrievalOperation(rpc.getLastComponent())) {
221 final Element xmlData = NetconfMessageTransformUtil.getDataSubtree(message.getDocument());
222 final ContainerSchemaNode schemaForDataRead = NetconfMessageTransformUtil.createSchemaForDataRead(schemaContext);
223 final ContainerNode dataNode = parserFactory.getContainerNodeParser().parse(Collections.singleton(xmlData), schemaForDataRead);
225 normalizedNode = Builders.containerBuilder().withNodeIdentifier(new YangInstanceIdentifier.NodeIdentifier(NetconfMessageTransformUtil.NETCONF_RPC_REPLY_QNAME))
226 .withChild(dataNode).build();
228 final Set<Element> documentElement = Collections.singleton(message.getDocument().getDocumentElement());
229 final RpcDefinition rpcDefinition = mappedRpcs.get(rpc.getLastComponent());
230 Preconditions.checkArgument(rpcDefinition != null, "Unable to parse response of %s, the rpc is unknown", rpc.getLastComponent());
232 // In case no input for rpc is defined, we can simply construct the payload here
233 if (rpcDefinition.getOutput() == null) {
234 Preconditions.checkArgument(XmlElement.fromDomDocument(message.getDocument()).getOnlyChildElementWithSameNamespaceOptionally("ok").isPresent(),
235 "Unexpected content in response of rpc: %s, %s", rpcDefinition.getQName(), message);
236 normalizedNode = null;
238 normalizedNode = parserFactory.getContainerNodeParser().parse(documentElement, rpcDefinition.getOutput());
241 return new DefaultDOMRpcResult(normalizedNode);