2 * Copyright (c) 2014, 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
9 package org.opendaylight.netconf.sal.connect.netconf;
11 import static org.opendaylight.netconf.sal.connect.netconf.util.NetconfMessageTransformUtil.NETCONF_DATA_QNAME;
12 import static org.opendaylight.netconf.sal.connect.netconf.util.NetconfMessageTransformUtil.NETCONF_GET_QNAME;
13 import static org.opendaylight.netconf.sal.connect.netconf.util.NetconfMessageTransformUtil.toId;
14 import static org.opendaylight.netconf.sal.connect.netconf.util.NetconfMessageTransformUtil.toPath;
16 import com.google.common.annotations.VisibleForTesting;
17 import com.google.common.base.Function;
18 import com.google.common.base.Optional;
19 import com.google.common.base.Preconditions;
20 import com.google.common.base.Strings;
21 import com.google.common.collect.Collections2;
22 import com.google.common.collect.Sets;
24 import java.util.Collections;
26 import java.util.concurrent.ExecutionException;
27 import org.opendaylight.controller.md.sal.dom.api.DOMRpcResult;
28 import org.opendaylight.netconf.sal.connect.netconf.listener.NetconfSessionPreferences;
29 import org.opendaylight.netconf.sal.connect.netconf.sal.NetconfDeviceRpc;
30 import org.opendaylight.netconf.sal.connect.netconf.schema.mapping.NetconfMessageTransformer;
31 import org.opendaylight.netconf.sal.connect.netconf.util.NetconfMessageTransformUtil;
32 import org.opendaylight.netconf.sal.connect.util.RemoteDeviceId;
33 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.netconf.monitoring.rev101004.NetconfState;
34 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.netconf.monitoring.rev101004.Yang;
35 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.netconf.monitoring.rev101004.netconf.state.Schemas;
36 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.netconf.monitoring.rev101004.netconf.state.schemas.Schema;
37 import org.opendaylight.yangtools.yang.common.QName;
38 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
39 import org.opendaylight.yangtools.yang.data.api.schema.ContainerNode;
40 import org.opendaylight.yangtools.yang.data.api.schema.DataContainerChild;
41 import org.opendaylight.yangtools.yang.data.api.schema.DataContainerNode;
42 import org.opendaylight.yangtools.yang.data.api.schema.LeafSetEntryNode;
43 import org.opendaylight.yangtools.yang.data.api.schema.LeafSetNode;
44 import org.opendaylight.yangtools.yang.data.api.schema.MapEntryNode;
45 import org.opendaylight.yangtools.yang.data.api.schema.MapNode;
46 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
47 import org.opendaylight.yangtools.yang.data.impl.schema.Builders;
48 import org.slf4j.Logger;
49 import org.slf4j.LoggerFactory;
52 * Holds QNames for all yang modules reported by ietf-netconf-monitoring/state/schemas
54 public final class NetconfStateSchemas {
56 private static final Logger LOG = LoggerFactory.getLogger(NetconfStateSchemas.class);
59 * Factory for NetconfStateSchemas
61 public interface NetconfStateSchemasResolver {
62 NetconfStateSchemas resolve(final NetconfDeviceRpc deviceRpc, final NetconfSessionPreferences remoteSessionCapabilities, final RemoteDeviceId id);
66 * Default implementation resolving schemas QNames from netconf-state
68 public static final class NetconfStateSchemasResolverImpl implements NetconfStateSchemasResolver {
71 public NetconfStateSchemas resolve(final NetconfDeviceRpc deviceRpc, final NetconfSessionPreferences remoteSessionCapabilities, final RemoteDeviceId id) {
72 return NetconfStateSchemas.create(deviceRpc, remoteSessionCapabilities, id);
76 public static final NetconfStateSchemas EMPTY = new NetconfStateSchemas(Collections.<RemoteYangSchema>emptySet());
78 private static final YangInstanceIdentifier STATE_SCHEMAS_IDENTIFIER =
79 YangInstanceIdentifier.builder().node(NetconfState.QNAME).node(Schemas.QNAME).build();
81 private static final ContainerNode GET_SCHEMAS_RPC;
83 final DataContainerChild<?, ?> filter = NetconfMessageTransformUtil.toFilterStructure(STATE_SCHEMAS_IDENTIFIER,
84 NetconfMessageTransformer.BaseSchema.BASE_NETCONF_CTX_WITH_NOTIFICATIONS.getSchemaContext());
86 = Builders.containerBuilder().withNodeIdentifier(toId(NETCONF_GET_QNAME)).withChild(filter).build();
89 private final Set<RemoteYangSchema> availableYangSchemas;
91 public NetconfStateSchemas(final Set<RemoteYangSchema> availableYangSchemas) {
92 this.availableYangSchemas = availableYangSchemas;
95 public Set<RemoteYangSchema> getAvailableYangSchemas() {
96 return availableYangSchemas;
99 public Set<QName> getAvailableYangSchemasQNames() {
100 return Sets.newHashSet(Collections2.transform(getAvailableYangSchemas(), new Function<RemoteYangSchema, QName>() {
102 public QName apply(final RemoteYangSchema input) {
103 return input.getQName();
109 * Issue get request to remote device and parse response to find all schemas under netconf-state/schemas
111 private static NetconfStateSchemas create(final NetconfDeviceRpc deviceRpc, final NetconfSessionPreferences remoteSessionCapabilities, final RemoteDeviceId id) {
112 if(remoteSessionCapabilities.isMonitoringSupported() == false) {
113 LOG.warn("{}: Netconf monitoring not supported on device, cannot detect provided schemas", id);
117 final DOMRpcResult schemasNodeResult;
119 schemasNodeResult = deviceRpc.invokeRpc(toPath(NETCONF_GET_QNAME), GET_SCHEMAS_RPC).get();
120 } catch (final InterruptedException e) {
121 Thread.currentThread().interrupt();
122 throw new RuntimeException(id + ": Interrupted while waiting for response to " + STATE_SCHEMAS_IDENTIFIER, e);
123 } catch (final ExecutionException e) {
124 LOG.warn("{}: Unable to detect available schemas, get to {} failed", id, STATE_SCHEMAS_IDENTIFIER, e);
128 if(schemasNodeResult.getErrors().isEmpty() == false) {
129 LOG.warn("{}: Unable to detect available schemas, get to {} failed, {}", id, STATE_SCHEMAS_IDENTIFIER, schemasNodeResult.getErrors());
133 final Optional<? extends NormalizedNode<?, ?>> schemasNode = findSchemasNode(schemasNodeResult.getResult());
135 if(schemasNode.isPresent()) {
136 Preconditions.checkState(schemasNode.get() instanceof ContainerNode,
137 "Expecting container containing schemas, but was %s", schemasNode.get());
138 return create(id, ((ContainerNode) schemasNode.get()));
140 LOG.warn("{}: Unable to detect available schemas, get to {} was empty", id, STATE_SCHEMAS_IDENTIFIER);
145 private static Optional<? extends NormalizedNode<?, ?>> findSchemasNode(final NormalizedNode<?, ?> result) {
147 return Optional.absent();
149 final Optional<DataContainerChild<?, ?>> dataNode = ((DataContainerNode<?>) result).getChild(toId(NETCONF_DATA_QNAME));
150 if(dataNode.isPresent() == false) {
151 return Optional.absent();
154 final Optional<DataContainerChild<? extends YangInstanceIdentifier.PathArgument, ?>> nStateNode =
155 ((DataContainerNode<?>) dataNode.get()).getChild(toId(NetconfState.QNAME));
156 if(nStateNode.isPresent() == false) {
157 return Optional.absent();
160 return ((DataContainerNode<?>) nStateNode.get()).getChild(toId(Schemas.QNAME));
164 * Parse response of get(netconf-state/schemas) to find all schemas under netconf-state/schemas
167 protected static NetconfStateSchemas create(final RemoteDeviceId id, final ContainerNode schemasNode) {
168 final Set<RemoteYangSchema> availableYangSchemas = Sets.newHashSet();
170 final Optional<DataContainerChild<? extends YangInstanceIdentifier.PathArgument, ?>> child = schemasNode.getChild(toId(Schema.QNAME));
171 Preconditions.checkState(child.isPresent(), "Unable to find list: %s in response: %s", Schema.QNAME.withoutRevision(), schemasNode);
172 Preconditions.checkState(child.get() instanceof MapNode, "Unexpected structure for container: %s in response: %s. Expecting a list", Schema.QNAME.withoutRevision(), schemasNode);
174 for (final MapEntryNode schemaNode : ((MapNode) child.get()).getValue()) {
175 final Optional<RemoteYangSchema> fromCompositeNode = RemoteYangSchema.createFromNormalizedNode(id, schemaNode);
176 if(fromCompositeNode.isPresent()) {
177 availableYangSchemas.add(fromCompositeNode.get());
181 return new NetconfStateSchemas(availableYangSchemas);
184 public final static class RemoteYangSchema {
185 private final QName qname;
187 RemoteYangSchema(final QName qname) {
191 public QName getQName() {
195 static Optional<RemoteYangSchema> createFromNormalizedNode(final RemoteDeviceId id, final MapEntryNode schemaNode) {
196 Preconditions.checkArgument(schemaNode.getNodeType().equals(Schema.QNAME), "Wrong QName %s", schemaNode.getNodeType());
198 QName childNode = NetconfMessageTransformUtil.IETF_NETCONF_MONITORING_SCHEMA_FORMAT;
200 String formatAsString = getSingleChildNodeValue(schemaNode, childNode).get();
202 if(formatAsString.equals(Yang.QNAME.toString()) == false) {
203 LOG.debug("{}: Ignoring schema due to unsupported format: {}", id, formatAsString);
204 return Optional.absent();
207 childNode = NetconfMessageTransformUtil.IETF_NETCONF_MONITORING_SCHEMA_LOCATION;
208 final Set<String> locationsAsString = getAllChildNodeValues(schemaNode, childNode);
209 if(locationsAsString.contains(Schema.Location.Enumeration.NETCONF.toString()) == false) {
210 LOG.debug("{}: Ignoring schema due to unsupported location: {}", id, locationsAsString);
211 return Optional.absent();
214 childNode = NetconfMessageTransformUtil.IETF_NETCONF_MONITORING_SCHEMA_NAMESPACE;
215 final String namespaceAsString = getSingleChildNodeValue(schemaNode, childNode).get();
217 childNode = NetconfMessageTransformUtil.IETF_NETCONF_MONITORING_SCHEMA_VERSION;
218 // Revision does not have to be filled
219 final Optional<String> revisionAsString = getSingleChildNodeValue(schemaNode, childNode);
221 childNode = NetconfMessageTransformUtil.IETF_NETCONF_MONITORING_SCHEMA_IDENTIFIER;
222 final String moduleNameAsString = getSingleChildNodeValue(schemaNode, childNode).get();
224 final QName moduleQName = revisionAsString.isPresent()
225 ? QName.create(namespaceAsString, revisionAsString.get(), moduleNameAsString)
226 : QName.create(URI.create(namespaceAsString), null, moduleNameAsString);
228 return Optional.of(new RemoteYangSchema(moduleQName));
232 * Extracts all values of a leaf-list node as a set of strings
234 private static Set<String> getAllChildNodeValues(final DataContainerNode<?> schemaNode, final QName childNodeQName) {
235 final Set<String> extractedValues = Sets.newHashSet();
236 final Optional<DataContainerChild<? extends YangInstanceIdentifier.PathArgument, ?>> child = schemaNode.getChild(toId(childNodeQName));
237 Preconditions.checkArgument(child.isPresent(), "Child nodes %s not present", childNodeQName);
238 Preconditions.checkArgument(child.get() instanceof LeafSetNode<?>, "Child nodes %s not present", childNodeQName);
239 for (final LeafSetEntryNode<?> childNode : ((LeafSetNode<?>) child.get()).getValue()) {
240 extractedValues.add(getValueOfSimpleNode(childNode).get());
242 return extractedValues;
245 private static Optional<String> getSingleChildNodeValue(final DataContainerNode<?> schemaNode, final QName childNode) {
246 final Optional<DataContainerChild<? extends YangInstanceIdentifier.PathArgument, ?>> node = schemaNode.getChild(toId(childNode));
247 Preconditions.checkArgument(node.isPresent(), "Child node %s not present", childNode);
248 return getValueOfSimpleNode(node.get());
251 private static Optional<String> getValueOfSimpleNode(final NormalizedNode<? extends YangInstanceIdentifier.PathArgument, ?> node) {
252 final Object value = node.getValue();
253 return value == null || Strings.isNullOrEmpty(value.toString()) ? Optional.<String>absent() : Optional.of(value.toString().trim());
257 public boolean equals(final Object o) {
261 if (o == null || getClass() != o.getClass()) {
265 final RemoteYangSchema that = (RemoteYangSchema) o;
267 if (!qname.equals(that.qname)) {
275 public int hashCode() {
276 return qname.hashCode();