2 * Copyright (c) 2016 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.restconf.nb.rfc8040.handlers;
10 import static java.util.Objects.requireNonNull;
12 import com.google.common.annotations.VisibleForTesting;
13 import com.google.common.base.Throwables;
14 import java.util.Collection;
15 import java.util.List;
17 import java.util.concurrent.ExecutionException;
18 import java.util.concurrent.atomic.AtomicInteger;
19 import javax.annotation.PostConstruct;
20 import javax.annotation.PreDestroy;
21 import javax.inject.Inject;
22 import javax.inject.Singleton;
23 import org.opendaylight.mdsal.common.api.LogicalDatastoreType;
24 import org.opendaylight.mdsal.common.api.TransactionCommitFailedException;
25 import org.opendaylight.mdsal.dom.api.DOMDataBroker;
26 import org.opendaylight.mdsal.dom.api.DOMDataTreeWriteTransaction;
27 import org.opendaylight.mdsal.dom.api.DOMSchemaService;
28 import org.opendaylight.restconf.common.errors.RestconfDocumentedException;
29 import org.opendaylight.restconf.nb.rfc8040.Rfc8040.IetfYangLibrary;
30 import org.opendaylight.restconf.nb.rfc8040.utils.mapping.RestconfMappingNodeUtil;
31 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.restconf.monitoring.rev170126.RestconfState;
32 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.library.rev190104.ModulesState;
33 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.library.rev190104.module.list.Module.ConformanceType;
34 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.library.rev190104.module.list.module.Deviation;
35 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.library.rev190104.module.list.module.Submodule;
36 import org.opendaylight.yangtools.concepts.ListenerRegistration;
37 import org.opendaylight.yangtools.yang.common.QName;
38 import org.opendaylight.yangtools.yang.common.Revision;
39 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
40 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifier;
41 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifierWithPredicates;
42 import org.opendaylight.yangtools.yang.data.api.schema.ContainerNode;
43 import org.opendaylight.yangtools.yang.data.api.schema.MapEntryNode;
44 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
45 import org.opendaylight.yangtools.yang.data.api.schema.SystemLeafSetNode;
46 import org.opendaylight.yangtools.yang.data.api.schema.SystemMapNode;
47 import org.opendaylight.yangtools.yang.data.api.schema.UserMapNode;
48 import org.opendaylight.yangtools.yang.data.api.schema.builder.CollectionNodeBuilder;
49 import org.opendaylight.yangtools.yang.data.api.schema.builder.DataContainerNodeBuilder;
50 import org.opendaylight.yangtools.yang.data.api.schema.builder.ListNodeBuilder;
51 import org.opendaylight.yangtools.yang.data.api.schema.tree.ConflictingModificationAppliedException;
52 import org.opendaylight.yangtools.yang.data.impl.schema.Builders;
53 import org.opendaylight.yangtools.yang.data.impl.schema.ImmutableNodes;
54 import org.opendaylight.yangtools.yang.model.api.EffectiveModelContext;
55 import org.opendaylight.yangtools.yang.model.api.EffectiveModelContextListener;
56 import org.opendaylight.yangtools.yang.model.api.FeatureDefinition;
57 import org.opendaylight.yangtools.yang.model.api.Module;
58 import org.opendaylight.yangtools.yang.model.api.ModuleLike;
59 import org.opendaylight.yangtools.yang.model.api.SchemaContext;
60 import org.slf4j.Logger;
61 import org.slf4j.LoggerFactory;
64 * Implementation of {@link SchemaContextHandler}.
66 // FIXME: this really is a service which is maintaining ietf-yang-library contents inside the datastore. It really
67 // should live in MD-SAL and be a dynamic store fragment. As a first step we should be turning this into a
68 // completely standalone application.
70 public class SchemaContextHandler implements EffectiveModelContextListener, AutoCloseable {
71 private static final Logger LOG = LoggerFactory.getLogger(SchemaContextHandler.class);
72 private static final NodeIdentifier MODULE_CONFORMANCE_NODEID =
73 NodeIdentifier.create(QName.create(IetfYangLibrary.MODULE_QNAME, "conformance-type").intern());
74 private static final NodeIdentifier MODULE_FEATURE_NODEID =
75 NodeIdentifier.create(QName.create(IetfYangLibrary.MODULE_QNAME, "feature").intern());
76 private static final NodeIdentifier MODULE_NAME_NODEID =
77 NodeIdentifier.create(QName.create(IetfYangLibrary.MODULE_QNAME, "name").intern());
78 private static final NodeIdentifier MODULE_NAMESPACE_NODEID =
79 NodeIdentifier.create(QName.create(IetfYangLibrary.MODULE_QNAME, "namespace").intern());
80 private static final NodeIdentifier MODULE_REVISION_NODEID =
81 NodeIdentifier.create(QName.create(IetfYangLibrary.MODULE_QNAME, "revision").intern());
82 private static final NodeIdentifier MODULE_SCHEMA_NODEID =
83 NodeIdentifier.create(QName.create(IetfYangLibrary.MODULE_QNAME, "schema").intern());
85 private final AtomicInteger moduleSetId = new AtomicInteger(0);
87 private final DOMDataBroker domDataBroker;
88 private final DOMSchemaService domSchemaService;
89 private ListenerRegistration<?> listenerRegistration;
91 private volatile EffectiveModelContext schemaContext;
94 public SchemaContextHandler(final DOMDataBroker domDataBroker, final DOMSchemaService domSchemaService) {
95 this.domDataBroker = requireNonNull(domDataBroker);
96 this.domSchemaService = requireNonNull(domSchemaService);
101 listenerRegistration = domSchemaService.registerSchemaContextListener(this);
106 public void close() {
107 if (listenerRegistration != null) {
108 listenerRegistration.close();
113 public void onModelContextUpdated(final EffectiveModelContext context) {
114 schemaContext = requireNonNull(context);
116 if (context.findModule(IetfYangLibrary.MODULE_QNAME).isPresent()) {
117 putData(mapModulesByIetfYangLibraryYang(context.getModules(), context,
118 String.valueOf(this.moduleSetId.incrementAndGet())));
121 final Module monitoringModule = schemaContext.findModule(RestconfState.QNAME.getModule()).orElse(null);
122 if (monitoringModule != null) {
123 putData(RestconfMappingNodeUtil.mapCapabilites(monitoringModule));
127 public EffectiveModelContext get() {
128 return schemaContext;
131 private void putData(final ContainerNode normNode) {
132 final DOMDataTreeWriteTransaction wTx = domDataBroker.newWriteOnlyTransaction();
133 wTx.put(LogicalDatastoreType.OPERATIONAL,
134 YangInstanceIdentifier.create(NodeIdentifier.create(normNode.getIdentifier().getNodeType())), normNode);
137 } catch (InterruptedException e) {
138 throw new RestconfDocumentedException("Problem occurred while putting data to DS.", e);
139 } catch (ExecutionException e) {
140 final TransactionCommitFailedException failure = Throwables.getCauseAs(e,
141 TransactionCommitFailedException.class);
142 if (failure.getCause() instanceof ConflictingModificationAppliedException) {
144 * Ignore error when another cluster node is already putting the same data to DS.
145 * We expect that cluster is homogeneous and that node was going to write the same data
146 * (that means no retry is needed). Transaction chain reset must be invoked to be able
147 * to continue writing data with another transaction after failed transaction.
148 * This is workaround for bug https://bugs.opendaylight.org/show_bug.cgi?id=7728
150 LOG.warn("Ignoring that another cluster node is already putting the same data to DS.", e);
152 throw new RestconfDocumentedException("Problem occurred while putting data to DS.", failure);
159 * Map data from modules to {@link NormalizedNode}.
161 * @param modules modules for mapping
162 * @param context schema context
163 * @param moduleSetId module-set-id of actual set
164 * @return mapped data as {@link NormalizedNode}
167 public static ContainerNode mapModulesByIetfYangLibraryYang(final Collection<? extends Module> modules,
168 final SchemaContext context, final String moduleSetId) {
169 final CollectionNodeBuilder<MapEntryNode, UserMapNode> mapBuilder = Builders.orderedMapBuilder()
170 .withNodeIdentifier(new NodeIdentifier(IetfYangLibrary.MODULE_QNAME_LIST));
171 for (final Module module : context.getModules()) {
172 fillMapByModules(mapBuilder, IetfYangLibrary.MODULE_QNAME_LIST, false, module, context);
174 return Builders.containerBuilder()
175 .withNodeIdentifier(new NodeIdentifier(ModulesState.QNAME))
176 .withChild(ImmutableNodes.leafNode(IetfYangLibrary.MODULE_SET_ID_LEAF_QNAME, moduleSetId))
177 .withChild(mapBuilder.build()).build();
182 * Map data by the specific module or submodule.
184 * @param mapBuilder ordered list builder for children
185 * @param mapQName QName corresponding to the list builder
186 * @param isSubmodule true if module is specified as submodule, false otherwise
187 * @param module specific module or submodule
188 * @param context schema context
190 private static void fillMapByModules(final CollectionNodeBuilder<MapEntryNode, UserMapNode> mapBuilder,
191 final QName mapQName, final boolean isSubmodule, final ModuleLike module, final SchemaContext context) {
192 final DataContainerNodeBuilder<NodeIdentifierWithPredicates, MapEntryNode> mapEntryBuilder =
193 newCommonLeafsMapEntryBuilder(mapQName, module);
195 mapEntryBuilder.withChild(ImmutableNodes.leafNode(MODULE_SCHEMA_NODEID,
196 "/modules/" + module.getName() + "/"
197 // FIXME: orElse(null) does not seem appropriate here
198 + module.getQNameModule().getRevision().map(Revision::toString).orElse(null)));
201 mapEntryBuilder.withChild(ImmutableNodes.leafNode(MODULE_NAMESPACE_NODEID,
202 module.getNamespace().toString()));
204 // features - not mandatory
205 if (module.getFeatures() != null && !module.getFeatures().isEmpty()) {
206 addFeatureLeafList(mapEntryBuilder, module.getFeatures());
208 // deviations - not mandatory
209 final ConformanceType conformance;
210 if (module.getDeviations() != null && !module.getDeviations().isEmpty()) {
211 addDeviationList(module, mapEntryBuilder, context);
212 conformance = ConformanceType.Implement;
214 conformance = ConformanceType.Import;
216 mapEntryBuilder.withChild(
217 ImmutableNodes.leafNode(MODULE_CONFORMANCE_NODEID, conformance.getName()));
219 // submodules - not mandatory
220 if (module.getSubmodules() != null && !module.getSubmodules().isEmpty()) {
221 addSubmodules(module, mapEntryBuilder, context);
224 mapBuilder.withChild(mapEntryBuilder.build());
228 * Mapping submodules of specific module.
230 * @param module module with submodules
231 * @param mapEntryBuilder mapEntryBuilder of parent for mapping children
232 * @param ietfYangLibraryModule ietf-yang-library module
233 * @param context schema context
235 private static void addSubmodules(final ModuleLike module,
236 final DataContainerNodeBuilder<NodeIdentifierWithPredicates, MapEntryNode> mapEntryBuilder,
237 final SchemaContext context) {
238 final CollectionNodeBuilder<MapEntryNode, UserMapNode> mapBuilder = Builders.orderedMapBuilder()
239 .withNodeIdentifier(new NodeIdentifier(Submodule.QNAME));
241 for (final var submodule : module.getSubmodules()) {
242 fillMapByModules(mapBuilder, Submodule.QNAME, true, submodule, context);
244 mapEntryBuilder.withChild(mapBuilder.build());
248 * Mapping deviations of specific module.
251 * module with deviations
252 * @param mapEntryBuilder
253 * mapEntryBuilder of parent for mapping children
257 private static void addDeviationList(final ModuleLike module,
258 final DataContainerNodeBuilder<NodeIdentifierWithPredicates, MapEntryNode> mapEntryBuilder,
259 final SchemaContext context) {
260 final CollectionNodeBuilder<MapEntryNode, SystemMapNode> deviations = Builders.mapBuilder()
261 .withNodeIdentifier(new NodeIdentifier(Deviation.QNAME));
262 for (final var deviation : module.getDeviations()) {
263 final List<QName> ids = deviation.getTargetPath().getNodeIdentifiers();
264 final QName lastComponent = ids.get(ids.size() - 1);
266 deviations.withChild(newCommonLeafsMapEntryBuilder(Deviation.QNAME,
267 context.findModule(lastComponent.getModule()).get())
270 mapEntryBuilder.withChild(deviations.build());
274 * Mapping features of specific module.
276 * @param mapEntryBuilder mapEntryBuilder of parent for mapping children
277 * @param features features of specific module
279 private static void addFeatureLeafList(
280 final DataContainerNodeBuilder<NodeIdentifierWithPredicates, MapEntryNode> mapEntryBuilder,
281 final Collection<? extends FeatureDefinition> features) {
282 final ListNodeBuilder<String, SystemLeafSetNode<String>> leafSetBuilder = Builders.<String>leafSetBuilder()
283 .withNodeIdentifier(MODULE_FEATURE_NODEID);
284 for (final FeatureDefinition feature : features) {
285 leafSetBuilder.withChildValue(feature.getQName().getLocalName());
287 mapEntryBuilder.withChild(leafSetBuilder.build());
290 private static DataContainerNodeBuilder<NodeIdentifierWithPredicates, MapEntryNode> newCommonLeafsMapEntryBuilder(
291 final QName qname, final ModuleLike module) {
292 final var name = module.getName();
293 final var revision = module.getQNameModule().getRevision().map(Revision::toString).orElse("");
294 return Builders.mapEntryBuilder()
295 .withNodeIdentifier(NodeIdentifierWithPredicates.of(qname,
296 Map.of(MODULE_NAME_NODEID.getNodeType(), name, MODULE_REVISION_NODEID.getNodeType(), revision)))
297 .withChild(ImmutableNodes.leafNode(MODULE_NAME_NODEID, name))
298 .withChild(ImmutableNodes.leafNode(MODULE_REVISION_NODEID, revision));