2 * Copyright (c) 2015 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.netconf.server.mdsal.operations;
10 import java.io.IOException;
12 import java.util.Optional;
13 import java.util.concurrent.ExecutionException;
14 import javax.xml.stream.XMLOutputFactory;
15 import javax.xml.stream.XMLStreamException;
16 import javax.xml.stream.XMLStreamWriter;
17 import javax.xml.transform.dom.DOMResult;
18 import javax.xml.transform.dom.DOMSource;
19 import org.eclipse.jdt.annotation.Nullable;
20 import org.opendaylight.mdsal.dom.api.DOMRpcResult;
21 import org.opendaylight.mdsal.dom.api.DOMRpcService;
22 import org.opendaylight.netconf.api.DocumentedException;
23 import org.opendaylight.netconf.api.NamespaceURN;
24 import org.opendaylight.netconf.api.NetconfDocumentedException;
25 import org.opendaylight.netconf.api.messages.RpcReplyMessage;
26 import org.opendaylight.netconf.api.xml.XmlElement;
27 import org.opendaylight.netconf.api.xml.XmlNetconfConstants;
28 import org.opendaylight.netconf.api.xml.XmlUtil;
29 import org.opendaylight.netconf.server.api.operations.AbstractSingletonNetconfOperation;
30 import org.opendaylight.netconf.server.api.operations.HandlingPriority;
31 import org.opendaylight.netconf.server.api.operations.NetconfOperationChainedExecution;
32 import org.opendaylight.netconf.server.mdsal.CurrentSchemaContext;
33 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.netconf.base._1._0.rev110601.SessionIdType;
34 import org.opendaylight.yangtools.yang.common.ErrorSeverity;
35 import org.opendaylight.yangtools.yang.common.ErrorTag;
36 import org.opendaylight.yangtools.yang.common.ErrorType;
37 import org.opendaylight.yangtools.yang.common.XMLNamespace;
38 import org.opendaylight.yangtools.yang.data.api.schema.ContainerNode;
39 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
40 import org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizedNodeStreamWriter;
41 import org.opendaylight.yangtools.yang.data.codec.xml.XMLStreamNormalizedNodeStreamWriter;
42 import org.opendaylight.yangtools.yang.data.codec.xml.XmlParserStream;
43 import org.opendaylight.yangtools.yang.data.impl.schema.ImmutableNormalizedNodeStreamWriter;
44 import org.opendaylight.yangtools.yang.data.impl.schema.NormalizationResultHolder;
45 import org.opendaylight.yangtools.yang.data.impl.schema.SchemaOrderedNormalizedNodeWriter;
46 import org.opendaylight.yangtools.yang.model.api.Module;
47 import org.opendaylight.yangtools.yang.model.api.RpcDefinition;
48 import org.opendaylight.yangtools.yang.model.api.stmt.SchemaNodeIdentifier.Absolute;
49 import org.opendaylight.yangtools.yang.model.util.SchemaInferenceStack;
50 import org.slf4j.Logger;
51 import org.slf4j.LoggerFactory;
52 import org.w3c.dom.Attr;
53 import org.w3c.dom.Document;
54 import org.w3c.dom.Element;
55 import org.w3c.dom.NodeList;
57 public class RuntimeRpc extends AbstractSingletonNetconfOperation {
58 private static final Logger LOG = LoggerFactory.getLogger(RuntimeRpc.class);
59 private static final XMLOutputFactory XML_OUTPUT_FACTORY;
62 XML_OUTPUT_FACTORY = XMLOutputFactory.newFactory();
63 XML_OUTPUT_FACTORY.setProperty(XMLOutputFactory.IS_REPAIRING_NAMESPACES, Boolean.TRUE);
66 private final CurrentSchemaContext schemaContext;
67 private final DOMRpcService rpcService;
69 public RuntimeRpc(final SessionIdType sessionId, final CurrentSchemaContext schemaContext,
70 final DOMRpcService rpcService) {
72 this.schemaContext = schemaContext;
73 this.rpcService = rpcService;
77 protected HandlingPriority canHandle(final String netconfOperationName, final String namespace) {
78 final XMLNamespace namespaceURI = createNsUri(namespace);
79 final Optional<? extends Module> module = getModule(namespaceURI);
81 if (module.isEmpty()) {
82 LOG.debug("Cannot handle rpc: {}, {}", netconfOperationName, namespace);
83 return HandlingPriority.CANNOT_HANDLE;
86 getRpcDefinitionFromModule(module.orElseThrow(), namespaceURI, netconfOperationName);
87 return HandlingPriority.HANDLE_WITH_DEFAULT_PRIORITY;
91 protected String getOperationName() {
92 throw new UnsupportedOperationException("Runtime rpc does not have a stable name");
95 private static XMLNamespace createNsUri(final String namespace) {
96 // May throw IllegalArgumentException, but that should never happen, as the namespace comes from parsed XML
97 return XMLNamespace.of(namespace);
100 //this returns module with the newest revision if more then 1 module with same namespace is found
101 private Optional<? extends Module> getModule(final XMLNamespace namespace) {
102 return schemaContext.getCurrentContext().findModules(namespace).stream().findFirst();
105 private static Optional<RpcDefinition> getRpcDefinitionFromModule(final Module module, final XMLNamespace namespace,
107 for (final RpcDefinition rpcDef : module.getRpcs()) {
108 if (rpcDef.getQName().getNamespace().equals(namespace) && rpcDef.getQName().getLocalName().equals(name)) {
109 return Optional.of(rpcDef);
112 return Optional.empty();
116 protected Element handleWithNoSubsequentOperations(final Document document, final XmlElement operationElement)
117 throws DocumentedException {
119 final String netconfOperationName = operationElement.getName();
120 final String netconfOperationNamespace;
122 netconfOperationNamespace = operationElement.getNamespace();
123 } catch (final DocumentedException e) {
124 LOG.debug("Cannot retrieve netconf operation namespace from message due to ", e);
125 throw new DocumentedException("Cannot retrieve netconf operation namespace from message", e,
126 ErrorType.PROTOCOL, ErrorTag.UNKNOWN_NAMESPACE, ErrorSeverity.ERROR);
129 final XMLNamespace namespaceURI = createNsUri(netconfOperationNamespace);
130 final Optional<? extends Module> moduleOptional = getModule(namespaceURI);
132 if (moduleOptional.isEmpty()) {
133 throw new DocumentedException("Unable to find module in Schema Context with namespace and name : "
134 + namespaceURI + " " + netconfOperationName + schemaContext.getCurrentContext(),
135 ErrorType.APPLICATION, ErrorTag.BAD_ELEMENT, ErrorSeverity.ERROR);
138 final Optional<RpcDefinition> rpcDefinitionOptional = getRpcDefinitionFromModule(moduleOptional.orElseThrow(),
139 namespaceURI, netconfOperationName);
141 if (rpcDefinitionOptional.isEmpty()) {
142 throw new DocumentedException(
143 "Unable to find RpcDefinition with namespace and name : "
144 + namespaceURI + " " + netconfOperationName,
145 ErrorType.APPLICATION, ErrorTag.BAD_ELEMENT, ErrorSeverity.ERROR);
148 final RpcDefinition rpcDefinition = rpcDefinitionOptional.orElseThrow();
149 final ContainerNode inputNode = rpcToNNode(operationElement, rpcDefinition);
151 final DOMRpcResult result;
153 result = rpcService.invokeRpc(rpcDefinition.getQName(), inputNode).get();
154 } catch (final InterruptedException | ExecutionException e) {
155 throw DocumentedException.wrap(e);
157 if (result.value() == null) {
158 return document.createElementNS(NamespaceURN.BASE, XmlNetconfConstants.OK);
160 return transformNormalizedNode(document, result.value(),
161 Absolute.of(rpcDefinition.getQName(), rpcDefinition.getOutput().getQName()));
165 public Document handle(final Document requestMessage, final NetconfOperationChainedExecution subsequentOperation)
166 throws DocumentedException {
167 final XmlElement requestElement = getRequestElementWithCheck(requestMessage);
168 final Document document = XmlUtil.newDocument();
169 final XmlElement operationElement = requestElement.getOnlyChildElement();
170 final Map<String, Attr> attributes = requestElement.getAttributes();
172 final Element response = handle(document, operationElement, subsequentOperation);
173 final Element rpcReply = document.createElementNS(NamespaceURN.BASE, RpcReplyMessage.ELEMENT_NAME);
175 if (XmlElement.fromDomElement(response).hasNamespace()) {
176 rpcReply.appendChild(response);
178 final NodeList list = response.getChildNodes();
179 if (list.getLength() == 0) {
180 rpcReply.appendChild(response);
182 while (list.getLength() != 0) {
183 rpcReply.appendChild(list.item(0));
188 for (final Attr attribute : attributes.values()) {
189 rpcReply.setAttributeNode((Attr) document.importNode(attribute, true));
191 document.appendChild(rpcReply);
195 private Element transformNormalizedNode(final Document document, final NormalizedNode data,
196 final Absolute rpcOutputPath) {
197 final DOMResult result = new DOMResult(document.createElement(RpcReplyMessage.ELEMENT_NAME));
199 final XMLStreamWriter xmlWriter = getXmlStreamWriter(result);
201 final NormalizedNodeStreamWriter nnStreamWriter = XMLStreamNormalizedNodeStreamWriter.create(xmlWriter,
202 schemaContext.getCurrentContext(), rpcOutputPath);
204 final SchemaOrderedNormalizedNodeWriter nnWriter = new SchemaOrderedNormalizedNodeWriter(nnStreamWriter,
205 schemaContext.getCurrentContext(), rpcOutputPath);
207 writeRootElement(xmlWriter, nnWriter, (ContainerNode) data);
209 nnStreamWriter.close();
211 } catch (IOException | XMLStreamException e) {
212 // FIXME: throw DocumentedException
213 LOG.warn("Error while closing streams", e);
216 return (Element) result.getNode();
219 private static XMLStreamWriter getXmlStreamWriter(final DOMResult result) {
221 return XML_OUTPUT_FACTORY.createXMLStreamWriter(result);
222 } catch (final XMLStreamException e) {
223 throw new IllegalStateException(e);
227 private static void writeRootElement(final XMLStreamWriter xmlWriter,
228 final SchemaOrderedNormalizedNodeWriter nnWriter, final ContainerNode data) {
230 nnWriter.write(data.body());
233 } catch (XMLStreamException | IOException e) {
234 // FIXME: throw DocumentedException
235 throw new IllegalStateException(e);
240 * Parses xml element rpc input into normalized node or null if rpc does not take any input.
242 * @param element rpc xml element
243 * @param rpcDefinition input container schema node, or null if rpc does not take any input
244 * @return parsed rpc into normalized node, or null if input schema is null
246 private @Nullable ContainerNode rpcToNNode(final XmlElement element,
247 final RpcDefinition rpcDefinition) throws DocumentedException {
248 final NormalizationResultHolder resultHolder = new NormalizationResultHolder();
249 final NormalizedNodeStreamWriter writer = ImmutableNormalizedNodeStreamWriter.from(resultHolder);
250 final XmlParserStream xmlParser = XmlParserStream.create(writer, SchemaInferenceStack.of(
251 schemaContext.getCurrentContext(),
252 Absolute.of(rpcDefinition.getQName(), rpcDefinition.getInput().getQName())).toInference());
255 xmlParser.traverse(new DOMSource(element.getDomElement()));
256 } catch (final XMLStreamException | IOException ex) {
257 throw new NetconfDocumentedException("Error parsing input: " + ex.getMessage(), ex,
258 ErrorType.PROTOCOL, ErrorTag.MALFORMED_MESSAGE, ErrorSeverity.ERROR);
261 return (ContainerNode) resultHolder.getResult().data();