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;
10 import static org.opendaylight.controller.sal.connect.netconf.util.NetconfMessageTransformUtil.GET_SCHEMA_QNAME;
11 import static org.opendaylight.controller.sal.connect.netconf.util.NetconfMessageTransformUtil.NETCONF_DATA_QNAME;
12 import static org.opendaylight.controller.sal.connect.netconf.util.NetconfMessageTransformUtil.toId;
14 import com.google.common.base.Function;
15 import com.google.common.base.MoreObjects;
16 import com.google.common.base.Optional;
17 import com.google.common.base.Preconditions;
18 import com.google.common.util.concurrent.CheckedFuture;
19 import com.google.common.util.concurrent.Futures;
20 import com.google.common.util.concurrent.ListenableFuture;
21 import java.io.IOException;
22 import java.io.InputStream;
23 import javax.xml.transform.dom.DOMSource;
24 import org.apache.commons.io.IOUtils;
25 import org.opendaylight.controller.md.sal.dom.api.DOMRpcResult;
26 import org.opendaylight.controller.md.sal.dom.api.DOMRpcService;
27 import org.opendaylight.controller.sal.connect.netconf.util.NetconfMessageTransformUtil;
28 import org.opendaylight.controller.sal.connect.util.RemoteDeviceId;
29 import org.opendaylight.yangtools.util.concurrent.ExceptionMapper;
30 import org.opendaylight.yangtools.yang.common.QName;
31 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
32 import org.opendaylight.yangtools.yang.data.api.schema.AnyXmlNode;
33 import org.opendaylight.yangtools.yang.data.api.schema.ContainerNode;
34 import org.opendaylight.yangtools.yang.data.api.schema.DataContainerChild;
35 import org.opendaylight.yangtools.yang.data.api.schema.LeafNode;
36 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
37 import org.opendaylight.yangtools.yang.data.impl.schema.Builders;
38 import org.opendaylight.yangtools.yang.data.impl.schema.builder.api.DataContainerNodeAttrBuilder;
39 import org.opendaylight.yangtools.yang.model.api.SchemaPath;
40 import org.opendaylight.yangtools.yang.model.repo.api.SchemaSourceException;
41 import org.opendaylight.yangtools.yang.model.repo.api.SourceIdentifier;
42 import org.opendaylight.yangtools.yang.model.repo.api.YangTextSchemaSource;
43 import org.opendaylight.yangtools.yang.model.repo.spi.SchemaSourceProvider;
44 import org.slf4j.Logger;
45 import org.slf4j.LoggerFactory;
46 import org.w3c.dom.Element;
48 public final class NetconfRemoteSchemaYangSourceProvider implements SchemaSourceProvider<YangTextSchemaSource> {
50 private static final Logger logger = LoggerFactory.getLogger(NetconfRemoteSchemaYangSourceProvider.class);
52 private static final ExceptionMapper<SchemaSourceException> MAPPER = new ExceptionMapper<SchemaSourceException>(
53 "schemaDownload", SchemaSourceException.class) {
55 protected SchemaSourceException newWithCause(final String s, final Throwable throwable) {
56 return new SchemaSourceException(s, throwable);
60 private final DOMRpcService rpc;
61 private final RemoteDeviceId id;
63 public NetconfRemoteSchemaYangSourceProvider(final RemoteDeviceId id, final DOMRpcService rpc) {
65 this.rpc = Preconditions.checkNotNull(rpc);
68 public static ContainerNode createGetSchemaRequest(final String moduleName, final Optional<String> revision) {
69 final QName identifierQName = QName.cachedReference(QName.create(NetconfMessageTransformUtil.GET_SCHEMA_QNAME, "identifier"));
70 final YangInstanceIdentifier.NodeIdentifier identifierId = new YangInstanceIdentifier.NodeIdentifier(identifierQName);
71 final LeafNode<String> identifier = Builders.<String>leafBuilder().withNodeIdentifier(identifierId).withValue(moduleName).build();
73 final QName formatQName = QName.cachedReference(QName.create(NetconfMessageTransformUtil.GET_SCHEMA_QNAME, "format"));
74 final YangInstanceIdentifier.NodeIdentifier formatId = new YangInstanceIdentifier.NodeIdentifier(formatQName);
75 final LeafNode<String> format = Builders.<String>leafBuilder().withNodeIdentifier(formatId).withValue("yang").build();
77 final DataContainerNodeAttrBuilder<YangInstanceIdentifier.NodeIdentifier, ContainerNode> builder = Builders.containerBuilder();
79 builder.withNodeIdentifier(new YangInstanceIdentifier.NodeIdentifier(NetconfMessageTransformUtil.GET_SCHEMA_QNAME))
80 .withChild(identifier)
83 if(revision.isPresent()) {
84 final QName revisionQName = QName.cachedReference(QName.create(NetconfMessageTransformUtil.GET_SCHEMA_QNAME, "version"));
85 final YangInstanceIdentifier.NodeIdentifier revisionId = new YangInstanceIdentifier.NodeIdentifier(revisionQName);
86 final LeafNode<String> revisionNode = Builders.<String>leafBuilder().withNodeIdentifier(revisionId).withValue(revision.get()).build();
88 builder.withChild(revisionNode);
91 return builder.build();
94 private static Optional<String> getSchemaFromRpc(final RemoteDeviceId id, final NormalizedNode<?, ?> result) {
96 return Optional.absent();
99 final QName schemaWrapperNode = QName.cachedReference(QName.create(GET_SCHEMA_QNAME, NETCONF_DATA_QNAME.getLocalName()));
100 final Optional<DataContainerChild<? extends YangInstanceIdentifier.PathArgument, ?>> child = ((ContainerNode) result).getChild(toId(schemaWrapperNode));
102 Preconditions.checkState(child.isPresent() && child.get() instanceof AnyXmlNode,
103 "%s Unexpected response to get-schema, expected response with one child %s, but was %s", id,
104 schemaWrapperNode, result);
106 final DOMSource wrappedNode = ((AnyXmlNode) child.get()).getValue();
107 Preconditions.checkNotNull(wrappedNode.getNode());
108 final Element dataNode = (Element) wrappedNode.getNode();
110 return Optional.of(dataNode.getTextContent().trim());
114 public CheckedFuture<YangTextSchemaSource, SchemaSourceException> getSource(final SourceIdentifier sourceIdentifier) {
115 final String moduleName = sourceIdentifier.getName();
117 // If formatted revision is SourceIdentifier.NOT_PRESENT_FORMATTED_REVISION, we have to omit it from request
118 final String formattedRevision = sourceIdentifier.getRevision().equals(SourceIdentifier.NOT_PRESENT_FORMATTED_REVISION) ? null : sourceIdentifier.getRevision();
119 final Optional<String> revision = Optional.fromNullable(formattedRevision);
120 final NormalizedNode<?, ?> getSchemaRequest = createGetSchemaRequest(moduleName, revision);
122 logger.trace("{}: Loading YANG schema source for {}:{}", id, moduleName, revision);
124 final ListenableFuture<YangTextSchemaSource> transformed = Futures.transform(
125 rpc.invokeRpc(SchemaPath.create(true, NetconfMessageTransformUtil.GET_SCHEMA_QNAME), getSchemaRequest),
126 new ResultToYangSourceTransformer(id, sourceIdentifier, moduleName, revision));
128 final CheckedFuture<YangTextSchemaSource, SchemaSourceException> checked = Futures.makeChecked(transformed, MAPPER);
130 // / FIXME remove this get, it is only present to wait until source is retrieved
131 // (goal is to limit concurrent schema download, since NetconfDevice listener does not handle concurrent messages properly)
134 logger.trace("{}: Blocking for {}", id, sourceIdentifier);
135 checked.checkedGet();
136 } catch (final SchemaSourceException e) {
137 return Futures.immediateFailedCheckedFuture(e);
144 * Transform composite node to string schema representation and then to ASTSchemaSource
146 private static final class ResultToYangSourceTransformer implements
147 Function<DOMRpcResult, YangTextSchemaSource> {
149 private final RemoteDeviceId id;
150 private final SourceIdentifier sourceIdentifier;
151 private final String moduleName;
152 private final Optional<String> revision;
154 public ResultToYangSourceTransformer(final RemoteDeviceId id, final SourceIdentifier sourceIdentifier,
155 final String moduleName, final Optional<String> revision) {
157 this.sourceIdentifier = sourceIdentifier;
158 this.moduleName = moduleName;
159 this.revision = revision;
163 public YangTextSchemaSource apply(final DOMRpcResult input) {
165 if (input.getErrors().isEmpty()) {
167 final Optional<String> schemaString = getSchemaFromRpc(id, input.getResult());
169 Preconditions.checkState(schemaString.isPresent(),
170 "%s: Unexpected response to get-schema, schema not present in message for: %s", id, sourceIdentifier);
172 logger.debug("{}: YANG Schema successfully retrieved for {}:{}", id, moduleName, revision);
173 return new NetconfYangTextSchemaSource(id, sourceIdentifier, schemaString);
176 logger.warn("{}: YANG schema was not successfully retrieved for {}. Errors: {}", id, sourceIdentifier,
179 throw new IllegalStateException(String.format(
180 "%s: YANG schema was not successfully retrieved for %s. Errors: %s", id, sourceIdentifier,
186 private static class NetconfYangTextSchemaSource extends YangTextSchemaSource {
187 private final RemoteDeviceId id;
188 private final Optional<String> schemaString;
190 public NetconfYangTextSchemaSource(final RemoteDeviceId id, final SourceIdentifier sId, final Optional<String> schemaString) {
193 this.schemaString = schemaString;
197 protected MoreObjects.ToStringHelper addToStringAttributes(final MoreObjects.ToStringHelper toStringHelper) {
198 return toStringHelper.add("device", id);
202 public InputStream openStream() throws IOException {
203 return IOUtils.toInputStream(schemaString.get());