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 org.apache.commons.io.IOUtils;
24 import org.opendaylight.controller.md.sal.dom.api.DOMRpcResult;
25 import org.opendaylight.controller.md.sal.dom.api.DOMRpcService;
26 import org.opendaylight.controller.sal.connect.netconf.util.NetconfMessageTransformUtil;
27 import org.opendaylight.controller.sal.connect.util.RemoteDeviceId;
28 import org.opendaylight.yangtools.util.concurrent.ExceptionMapper;
29 import org.opendaylight.yangtools.yang.common.QName;
30 import org.opendaylight.yangtools.yang.data.api.Node;
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;
47 public final class NetconfRemoteSchemaYangSourceProvider implements SchemaSourceProvider<YangTextSchemaSource> {
49 private static final Logger logger = LoggerFactory.getLogger(NetconfRemoteSchemaYangSourceProvider.class);
51 private static final ExceptionMapper<SchemaSourceException> MAPPER = new ExceptionMapper<SchemaSourceException>(
52 "schemaDownload", SchemaSourceException.class) {
54 protected SchemaSourceException newWithCause(final String s, final Throwable throwable) {
55 return new SchemaSourceException(s, throwable);
59 private final DOMRpcService rpc;
60 private final RemoteDeviceId id;
62 public NetconfRemoteSchemaYangSourceProvider(final RemoteDeviceId id, final DOMRpcService rpc) {
64 this.rpc = Preconditions.checkNotNull(rpc);
67 public static ContainerNode createGetSchemaRequest(final String moduleName, final Optional<String> revision) {
68 final QName identifierQName = QName.cachedReference(QName.create(NetconfMessageTransformUtil.GET_SCHEMA_QNAME, "identifier"));
69 final YangInstanceIdentifier.NodeIdentifier identifierId = new YangInstanceIdentifier.NodeIdentifier(identifierQName);
70 final LeafNode<String> identifier = Builders.<String>leafBuilder().withNodeIdentifier(identifierId).withValue(moduleName).build();
72 final QName formatQName = QName.cachedReference(QName.create(NetconfMessageTransformUtil.GET_SCHEMA_QNAME, "format"));
73 final YangInstanceIdentifier.NodeIdentifier formatId = new YangInstanceIdentifier.NodeIdentifier(formatQName);
74 final LeafNode<String> format = Builders.<String>leafBuilder().withNodeIdentifier(formatId).withValue("yang").build();
76 final DataContainerNodeAttrBuilder<YangInstanceIdentifier.NodeIdentifier, ContainerNode> builder = Builders.containerBuilder();
78 builder.withNodeIdentifier(new YangInstanceIdentifier.NodeIdentifier(NetconfMessageTransformUtil.GET_SCHEMA_QNAME))
79 .withChild(identifier)
82 if(revision.isPresent()) {
83 final QName revisionQName = QName.cachedReference(QName.create(NetconfMessageTransformUtil.GET_SCHEMA_QNAME, "version"));
84 final YangInstanceIdentifier.NodeIdentifier revisionId = new YangInstanceIdentifier.NodeIdentifier(revisionQName);
85 final LeafNode<String> revisionNode = Builders.<String>leafBuilder().withNodeIdentifier(revisionId).withValue(revision.get()).build();
87 builder.withChild(revisionNode);
90 return builder.build();
93 private static Optional<String> getSchemaFromRpc(final RemoteDeviceId id, final NormalizedNode<?, ?> result) {
95 return Optional.absent();
98 final QName schemaWrapperNode = QName.cachedReference(QName.create(GET_SCHEMA_QNAME, NETCONF_DATA_QNAME.getLocalName()));
99 final Optional<DataContainerChild<? extends YangInstanceIdentifier.PathArgument, ?>> child = ((ContainerNode) result).getChild(toId(schemaWrapperNode));
101 Preconditions.checkState(child.isPresent() && child.get() instanceof AnyXmlNode,
102 "%s Unexpected response to get-schema, expected response with one child %s, but was %s", id,
103 schemaWrapperNode, result);
105 final Node<?> wrappedNode = (Node<?>) child.get().getValue();
106 final Object potential = wrappedNode.getValue();
108 return potential instanceof String ? Optional.of((String) potential) : Optional.<String> absent();
112 public CheckedFuture<YangTextSchemaSource, SchemaSourceException> getSource(final SourceIdentifier sourceIdentifier) {
113 final String moduleName = sourceIdentifier.getName();
115 // If formatted revision is SourceIdentifier.NOT_PRESENT_FORMATTED_REVISION, we have to omit it from request
116 final String formattedRevision = sourceIdentifier.getRevision().equals(SourceIdentifier.NOT_PRESENT_FORMATTED_REVISION) ? null : sourceIdentifier.getRevision();
117 final Optional<String> revision = Optional.fromNullable(formattedRevision);
118 final NormalizedNode<?, ?> getSchemaRequest = createGetSchemaRequest(moduleName, revision);
120 logger.trace("{}: Loading YANG schema source for {}:{}", id, moduleName, revision);
122 final ListenableFuture<YangTextSchemaSource> transformed = Futures.transform(
123 rpc.invokeRpc(SchemaPath.create(true, NetconfMessageTransformUtil.GET_SCHEMA_QNAME), getSchemaRequest),
124 new ResultToYangSourceTransformer(id, sourceIdentifier, moduleName, revision));
126 final CheckedFuture<YangTextSchemaSource, SchemaSourceException> checked = Futures.makeChecked(transformed, MAPPER);
128 // / FIXME remove this get, it is only present to wait until source is retrieved
129 // (goal is to limit concurrent schema download, since NetconfDevice listener does not handle concurrent messages properly)
132 logger.trace("{}: Blocking for {}", id, sourceIdentifier);
133 checked.checkedGet();
134 } catch (final SchemaSourceException e) {
135 return Futures.immediateFailedCheckedFuture(e);
142 * Transform composite node to string schema representation and then to ASTSchemaSource
144 private static final class ResultToYangSourceTransformer implements
145 Function<DOMRpcResult, YangTextSchemaSource> {
147 private final RemoteDeviceId id;
148 private final SourceIdentifier sourceIdentifier;
149 private final String moduleName;
150 private final Optional<String> revision;
152 public ResultToYangSourceTransformer(final RemoteDeviceId id, final SourceIdentifier sourceIdentifier,
153 final String moduleName, final Optional<String> revision) {
155 this.sourceIdentifier = sourceIdentifier;
156 this.moduleName = moduleName;
157 this.revision = revision;
161 public YangTextSchemaSource apply(final DOMRpcResult input) {
163 if (input.getErrors().isEmpty()) {
165 final Optional<String> schemaString = getSchemaFromRpc(id, input.getResult());
167 Preconditions.checkState(schemaString.isPresent(),
168 "%s: Unexpected response to get-schema, schema not present in message for: %s", id, sourceIdentifier);
170 logger.debug("{}: YANG Schema successfully retrieved for {}:{}", id, moduleName, revision);
171 return new NetconfYangTextSchemaSource(id, sourceIdentifier, schemaString);
174 logger.warn("{}: YANG schema was not successfully retrieved for {}. Errors: {}", id, sourceIdentifier,
177 throw new IllegalStateException(String.format(
178 "%s: YANG schema was not successfully retrieved for %s. Errors: %s", id, sourceIdentifier,
184 private static class NetconfYangTextSchemaSource extends YangTextSchemaSource {
185 private final RemoteDeviceId id;
186 private final Optional<String> schemaString;
188 public NetconfYangTextSchemaSource(final RemoteDeviceId id, final SourceIdentifier sId, final Optional<String> schemaString) {
191 this.schemaString = schemaString;
195 protected MoreObjects.ToStringHelper addToStringAttributes(final MoreObjects.ToStringHelper toStringHelper) {
196 return toStringHelper.add("device", id);
200 public InputStream openStream() throws IOException {
201 return IOUtils.toInputStream(schemaString.get());