netconf/mdsal-netconf-connector/src/main/java/org/opendaylight/netconf/mdsal/connector/ops/EditConfig.java

   1 /*
   2  * Copyright (c) 2015 Cisco Systems, Inc. and others.  All rights reserved.
   3  *
   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
   7  */
   8
   9 package org.opendaylight.netconf.mdsal.connector.ops;
  10
  11 import com.google.common.base.Optional;
  12 import com.google.common.base.Preconditions;
  13 import com.google.common.collect.ImmutableMap;
  14 import java.io.StringReader;
  15 import java.net.URI;
  16 import java.net.URISyntaxException;
  17 import java.util.List;
  18 import java.util.ListIterator;
  19 import java.util.Map;
  20 import java.util.stream.Collectors;
  21 import org.opendaylight.controller.config.util.xml.DocumentedException;
  22 import org.opendaylight.controller.config.util.xml.DocumentedException.ErrorSeverity;
  23 import org.opendaylight.controller.config.util.xml.DocumentedException.ErrorTag;
  24 import org.opendaylight.controller.config.util.xml.DocumentedException.ErrorType;
  25 import org.opendaylight.controller.config.util.xml.XmlElement;
  26 import org.opendaylight.controller.config.util.xml.XmlUtil;
  27 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  28 import org.opendaylight.controller.md.sal.common.api.data.ReadFailedException;
  29 import org.opendaylight.controller.md.sal.dom.api.DOMDataReadWriteTransaction;
  30 import org.opendaylight.netconf.api.NetconfDocumentedException;
  31 import org.opendaylight.netconf.api.xml.XmlNetconfConstants;
  32 import org.opendaylight.netconf.mdsal.connector.CurrentSchemaContext;
  33 import org.opendaylight.netconf.mdsal.connector.TransactionProvider;
  34 import org.opendaylight.netconf.mdsal.connector.ops.DataTreeChangeTracker.DataTreeChange;
  35 import org.opendaylight.netconf.util.mapping.AbstractSingletonNetconfOperation;
  36 import org.opendaylight.yangtools.util.xml.UntrustedXML;
  37 import org.opendaylight.yangtools.yang.common.QName;
  38 import org.opendaylight.yangtools.yang.data.api.ModifyAction;
  39 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  40 import org.opendaylight.yangtools.yang.data.api.schema.AugmentationNode;
  41 import org.opendaylight.yangtools.yang.data.api.schema.MapEntryNode;
  42 import org.opendaylight.yangtools.yang.data.api.schema.MapNode;
  43 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  44 import org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizedNodeStreamWriter;
  45 import org.opendaylight.yangtools.yang.data.codec.xml.XmlParserStream;
  46 import org.opendaylight.yangtools.yang.data.impl.schema.Builders;
  47 import org.opendaylight.yangtools.yang.data.impl.schema.NormalizedNodeResult;
  48 import org.opendaylight.yangtools.yang.model.api.ContainerSchemaNode;
  49 import org.opendaylight.yangtools.yang.model.api.DataSchemaNode;
  50 import org.opendaylight.yangtools.yang.model.api.ListSchemaNode;
  51 import org.opendaylight.yangtools.yang.model.api.Module;
  52 import org.opendaylight.yangtools.yang.model.api.SchemaNode;
  53 import org.opendaylight.yangtools.yang.model.util.SchemaContextUtil;
  54 import org.slf4j.Logger;
  55 import org.slf4j.LoggerFactory;
  56 import org.w3c.dom.Document;
  57 import org.w3c.dom.Element;
  58 import org.w3c.dom.NodeList;
  59
  60 public class EditConfig extends AbstractSingletonNetconfOperation {
  61
  62     private static final Logger LOG = LoggerFactory.getLogger(EditConfig.class);
  63
  64     private static final String OPERATION_NAME = "edit-config";
  65     private static final String CONFIG_KEY = "config";
  66     private static final String TARGET_KEY = "target";
  67     private static final String DEFAULT_OPERATION_KEY = "default-operation";
  68     private final CurrentSchemaContext schemaContext;
  69     private final TransactionProvider transactionProvider;
  70
  71     public EditConfig(final String netconfSessionIdForReporting, final CurrentSchemaContext schemaContext,
  72             final TransactionProvider transactionProvider) {
  73         super(netconfSessionIdForReporting);
  74         this.schemaContext = schemaContext;
  75         this.transactionProvider = transactionProvider;
  76     }
  77
  78     @Override
  79     protected Element handleWithNoSubsequentOperations(final Document document, final XmlElement operationElement)
  80             throws DocumentedException {
  81         final Datastore targetDatastore = extractTargetParameter(operationElement);
  82         if (targetDatastore == Datastore.running) {
  83             throw new DocumentedException("edit-config on running datastore is not supported",
  84                     ErrorType.PROTOCOL,
  85                     ErrorTag.OPERATION_NOT_SUPPORTED,
  86                     ErrorSeverity.ERROR);
  87         }
  88
  89         final ModifyAction defaultAction = getDefaultOperation(operationElement);
  90
  91         final XmlElement configElement = getElement(operationElement, CONFIG_KEY);
  92
  93         for (final XmlElement element : configElement.getChildElements()) {
  94             final String ns = element.getNamespace();
  95             final DataSchemaNode schemaNode = getSchemaNodeFromNamespace(ns, element).get();
  96
  97             final DataTreeChangeTracker changeTracker = new DataTreeChangeTracker(defaultAction);
  98
  99             parseIntoNormalizedNode(schemaNode, element, changeTracker);
 100             executeOperations(changeTracker);
 101         }
 102
 103         return XmlUtil.createElement(document, XmlNetconfConstants.OK, Optional.absent());
 104     }
 105
 106     private void executeOperations(final DataTreeChangeTracker changeTracker) throws DocumentedException {
 107         final DOMDataReadWriteTransaction rwTx = transactionProvider.getOrCreateTransaction();
 108         final List<DataTreeChange> aa = changeTracker.getDataTreeChanges();
 109         final ListIterator<DataTreeChange> iterator = aa.listIterator(aa.size());
 110
 111         while (iterator.hasPrevious()) {
 112             final DataTreeChange dtc = iterator.previous();
 113             executeChange(rwTx, dtc);
 114         }
 115     }
 116
 117     private void executeChange(final DOMDataReadWriteTransaction rwtx, final DataTreeChange change)
 118             throws DocumentedException {
 119         final YangInstanceIdentifier path = YangInstanceIdentifier.create(change.getPath());
 120         final NormalizedNode<?, ?> changeData = change.getChangeRoot();
 121         switch (change.getAction()) {
 122             case NONE:
 123                 return;
 124             case MERGE:
 125                 mergeParentMixin(rwtx, path, changeData);
 126                 rwtx.merge(LogicalDatastoreType.CONFIGURATION, path, changeData);
 127                 break;
 128             case CREATE:
 129                 try {
 130                     final Optional<NormalizedNode<?, ?>> readResult =
 131                             rwtx.read(LogicalDatastoreType.CONFIGURATION, path).checkedGet();
 132                     if (readResult.isPresent()) {
 133                         throw new DocumentedException("Data already exists, cannot execute CREATE operation",
 134                             ErrorType.PROTOCOL, ErrorTag.DATA_EXISTS, ErrorSeverity.ERROR);
 135                     }
 136                     mergeParentMixin(rwtx, path, changeData);
 137                     rwtx.put(LogicalDatastoreType.CONFIGURATION, path, changeData);
 138                 } catch (final ReadFailedException e) {
 139                     LOG.warn("Read from datastore failed when trying to read data for create operation", change, e);
 140                 }
 141                 break;
 142             case REPLACE:
 143                 mergeParentMixin(rwtx, path, changeData);
 144                 rwtx.put(LogicalDatastoreType.CONFIGURATION, path, changeData);
 145                 break;
 146             case DELETE:
 147                 try {
 148                     final Optional<NormalizedNode<?, ?>> readResult =
 149                             rwtx.read(LogicalDatastoreType.CONFIGURATION, path).checkedGet();
 150                     if (!readResult.isPresent()) {
 151                         throw new DocumentedException("Data is missing, cannot execute DELETE operation",
 152                             ErrorType.PROTOCOL, ErrorTag.DATA_MISSING, ErrorSeverity.ERROR);
 153                     }
 154                     rwtx.delete(LogicalDatastoreType.CONFIGURATION, path);
 155                 } catch (final ReadFailedException e) {
 156                     LOG.warn("Read from datastore failed when trying to read data for delete operation", change, e);
 157                 }
 158                 break;
 159             case REMOVE:
 160                 rwtx.delete(LogicalDatastoreType.CONFIGURATION, path);
 161                 break;
 162             default:
 163                 LOG.warn("Unknown/not implemented operation, not executing");
 164         }
 165     }
 166
 167     private void mergeParentMixin(final DOMDataReadWriteTransaction rwtx, final YangInstanceIdentifier path,
 168                                 final NormalizedNode change) {
 169         final YangInstanceIdentifier parentNodeYid = path.getParent();
 170         if (change instanceof MapEntryNode) {
 171             final SchemaNode schemaNode = SchemaContextUtil.findNodeInSchemaContext(
 172                     schemaContext.getCurrentContext(),
 173                     parentNodeYid.getPathArguments().stream()
 174                             // filter out identifiers not present in the schema tree
 175                             .filter(arg -> !(arg instanceof YangInstanceIdentifier.NodeIdentifierWithPredicates))
 176                             .filter(arg -> !(arg instanceof YangInstanceIdentifier.AugmentationIdentifier))
 177                             .map(YangInstanceIdentifier.PathArgument::getNodeType).collect(Collectors.toList()));
 178
 179             // we should have the schema node that points to the parent list now, enforce it
 180             Preconditions.checkState(schemaNode instanceof ListSchemaNode, "Schema node is not pointing to a list.");
 181
 182             //merge empty ordered or unordered map
 183             if (((ListSchemaNode) schemaNode).isUserOrdered()) {
 184                 final MapNode mixinNode = Builders.orderedMapBuilder()
 185                         .withNodeIdentifier(
 186                                 new YangInstanceIdentifier.NodeIdentifier(
 187                                         parentNodeYid.getLastPathArgument().getNodeType()))
 188                         .build();
 189                 rwtx.merge(LogicalDatastoreType.CONFIGURATION, parentNodeYid, mixinNode);
 190                 return;
 191             }
 192
 193             final MapNode mixinNode = Builders.mapBuilder()
 194                     .withNodeIdentifier(
 195                             new YangInstanceIdentifier.NodeIdentifier(
 196                                         parentNodeYid.getLastPathArgument().getNodeType()))
 197                     .build();
 198             rwtx.merge(LogicalDatastoreType.CONFIGURATION, parentNodeYid, mixinNode);
 199         } else if (parentNodeYid.getLastPathArgument() instanceof YangInstanceIdentifier.AugmentationIdentifier) {
 200             // merge empty augmentation node
 201             final YangInstanceIdentifier.AugmentationIdentifier augmentationYid =
 202                 (YangInstanceIdentifier.AugmentationIdentifier) parentNodeYid.getLastPathArgument();
 203             final AugmentationNode augmentationNode = Builders.augmentationBuilder()
 204                 .withNodeIdentifier(augmentationYid).build();
 205             rwtx.merge(LogicalDatastoreType.CONFIGURATION, parentNodeYid, augmentationNode);
 206         }
 207     }
 208
 209     @SuppressWarnings("checkstyle:IllegalCatch")
 210     private NormalizedNode<?, ?> parseIntoNormalizedNode(final DataSchemaNode schemaNode, final XmlElement element,
 211             final DataTreeChangeTracker changeTracker) throws DocumentedException {
 212         if (!(schemaNode instanceof ContainerSchemaNode) && !(schemaNode instanceof ListSchemaNode)) {
 213             //this should never happen since edit-config on any other node type should not be possible nor makes sense
 214             LOG.debug("DataNode from module is not ContainerSchemaNode nor ListSchemaNode, aborting..");
 215             throw new UnsupportedOperationException("implement exception if parse fails");
 216         }
 217
 218         final NormalizedNodeResult resultHolder = new NormalizedNodeResult();
 219         final NormalizedNodeStreamWriter writer = new EditOperationNormalizedNodeStreamWriter(resultHolder,
 220                 changeTracker);
 221         final XmlParserStream xmlParser = XmlParserStream.create(writer, schemaContext.getCurrentContext(), schemaNode);
 222         try {
 223             xmlParser.parse(UntrustedXML.createXMLStreamReader(new StringReader(XmlUtil.toString(element))));
 224         } catch (final Exception ex) {
 225             throw new NetconfDocumentedException("Error parsing input: " + ex.getMessage(), ex, ErrorType.PROTOCOL,
 226                     ErrorTag.MALFORMED_MESSAGE, ErrorSeverity.ERROR);
 227         }
 228
 229         return resultHolder.getResult();
 230     }
 231
 232     private Optional<DataSchemaNode> getSchemaNodeFromNamespace(final String namespace, final XmlElement element)
 233             throws DocumentedException {
 234         Optional<DataSchemaNode> dataSchemaNode = Optional.absent();
 235         try {
 236             // returns module with newest revision since findModuleByNamespace returns a set of modules and we only
 237             // need the newest one
 238             final Module module =
 239                     schemaContext.getCurrentContext().findModuleByNamespaceAndRevision(new URI(namespace), null);
 240             if (module == null) {
 241                 // no module is present with this namespace
 242                 throw new NetconfDocumentedException("Unable to find module by namespace: " + namespace,
 243                         ErrorType.APPLICATION, ErrorTag.UNKNOWN_NAMESPACE, ErrorSeverity.ERROR);
 244             }
 245             final DataSchemaNode schemaNode =
 246                     module.getDataChildByName(QName.create(module.getQNameModule(), element.getName()));
 247             if (schemaNode != null) {
 248                 dataSchemaNode = Optional.of(schemaNode);
 249             } else {
 250                 throw new DocumentedException(
 251                         "Unable to find node with namespace: " + namespace + "in module: " + module.toString(),
 252                         ErrorType.APPLICATION,
 253                         ErrorTag.UNKNOWN_NAMESPACE,
 254                         ErrorSeverity.ERROR);
 255             }
 256         } catch (final URISyntaxException e) {
 257             LOG.debug("Unable to create URI for namespace : {}", namespace);
 258         }
 259
 260         return dataSchemaNode;
 261     }
 262
 263     private static Datastore extractTargetParameter(final XmlElement operationElement) throws DocumentedException {
 264         final NodeList elementsByTagName = operationElement.getDomElement().getElementsByTagName(TARGET_KEY);
 265         // Direct lookup instead of using XmlElement class due to performance
 266         if (elementsByTagName.getLength() == 0) {
 267             final Map<String, String> errorInfo = ImmutableMap.of("bad-attribute", TARGET_KEY, "bad-element",
 268                 OPERATION_NAME);
 269             throw new DocumentedException("Missing target element", ErrorType.PROTOCOL, ErrorTag.MISSING_ATTRIBUTE,
 270                 ErrorSeverity.ERROR, errorInfo);
 271         } else if (elementsByTagName.getLength() > 1) {
 272             throw new DocumentedException("Multiple target elements", ErrorType.RPC, ErrorTag.UNKNOWN_ATTRIBUTE,
 273                 ErrorSeverity.ERROR);
 274         } else {
 275             final XmlElement targetChildNode =
 276                     XmlElement.fromDomElement((Element) elementsByTagName.item(0)).getOnlyChildElement();
 277             return Datastore.valueOf(targetChildNode.getName());
 278         }
 279     }
 280
 281     private static ModifyAction getDefaultOperation(final XmlElement operationElement) throws DocumentedException {
 282         final NodeList elementsByTagName = operationElement.getDomElement().getElementsByTagName(DEFAULT_OPERATION_KEY);
 283         if (elementsByTagName.getLength() == 0) {
 284             return ModifyAction.MERGE;
 285         } else if (elementsByTagName.getLength() > 1) {
 286             throw new DocumentedException("Multiple " + DEFAULT_OPERATION_KEY + " elements", ErrorType.RPC,
 287                 ErrorTag.UNKNOWN_ATTRIBUTE, ErrorSeverity.ERROR);
 288         } else {
 289             return ModifyAction.fromXmlValue(elementsByTagName.item(0).getTextContent());
 290         }
 291
 292     }
 293
 294     private static XmlElement getElement(final XmlElement operationElement, final String elementName)
 295             throws DocumentedException {
 296         final Optional<XmlElement> childNode = operationElement.getOnlyChildElementOptionally(elementName);
 297         if (!childNode.isPresent()) {
 298             throw new DocumentedException(elementName + " element is missing",
 299                     ErrorType.PROTOCOL,
 300                     ErrorTag.MISSING_ELEMENT,
 301                     ErrorSeverity.ERROR);
 302         }
 303
 304         return childNode.get();
 305     }
 306
 307     @Override
 308     protected String getOperationName() {
 309         return OPERATION_NAME;
 310     }
 311
 312 }