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.yanglib.impl;
10 import static com.google.common.base.Preconditions.checkArgument;
11 import static java.util.Objects.requireNonNull;
13 import com.google.common.base.Predicate;
14 import com.google.common.base.Strings;
15 import com.google.common.collect.Iterables;
16 import com.google.common.util.concurrent.FutureCallback;
17 import com.google.common.util.concurrent.ListenableFuture;
18 import com.google.common.util.concurrent.MoreExecutors;
20 import java.io.IOException;
21 import java.nio.charset.StandardCharsets;
22 import java.util.HashMap;
24 import java.util.Optional;
25 import java.util.concurrent.ExecutionException;
26 import org.opendaylight.mdsal.binding.api.DataBroker;
27 import org.opendaylight.mdsal.binding.api.WriteTransaction;
28 import org.opendaylight.mdsal.common.api.CommitInfo;
29 import org.opendaylight.mdsal.common.api.LogicalDatastoreType;
30 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.Uri;
31 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.library.rev190104.LegacyRevisionUtils;
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.ModulesStateBuilder;
34 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.library.rev190104.module.list.Module;
35 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.library.rev190104.module.list.ModuleBuilder;
36 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.library.rev190104.module.list.ModuleKey;
37 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.types.rev130715.YangIdentifier;
38 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.controller.yanglib.impl.rev141210.YanglibConfig;
39 import org.opendaylight.yanglib.api.YangLibService;
40 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
41 import org.opendaylight.yangtools.yang.model.repo.api.SchemaSourceRepresentation;
42 import org.opendaylight.yangtools.yang.model.repo.api.SourceIdentifier;
43 import org.opendaylight.yangtools.yang.model.repo.api.YangTextSchemaSource;
44 import org.opendaylight.yangtools.yang.model.repo.fs.FilesystemSchemaSourceCache;
45 import org.opendaylight.yangtools.yang.model.repo.spi.PotentialSchemaSource;
46 import org.opendaylight.yangtools.yang.model.repo.spi.SchemaListenerRegistration;
47 import org.opendaylight.yangtools.yang.model.repo.spi.SchemaSourceListener;
48 import org.opendaylight.yangtools.yang.parser.api.YangParserFactory;
49 import org.opendaylight.yangtools.yang.parser.repo.SharedSchemaRepository;
50 import org.slf4j.Logger;
51 import org.slf4j.LoggerFactory;
54 * Listens on new schema sources registered event. For each new source
55 * registered generates URL representing its schema source and write this URL
56 * along with source identifier to
57 * ietf-netconf-yang-library/modules-state/module list.
59 public class YangLibProvider implements AutoCloseable, SchemaSourceListener, YangLibService {
60 private static final Logger LOG = LoggerFactory.getLogger(YangLibProvider.class);
62 private static final Predicate<PotentialSchemaSource<?>> YANG_SCHEMA_SOURCE =
63 input -> YangTextSchemaSource.class.isAssignableFrom(input.getRepresentation());
65 private final DataBroker dataBroker;
66 private final YanglibConfig yanglibConfig;
67 private final SharedSchemaRepository schemaRepository;
68 private SchemaListenerRegistration schemaListenerRegistration;
70 public YangLibProvider(final YanglibConfig yanglibConfig, final DataBroker dataBroker,
71 final YangParserFactory parserFactory) {
72 this.yanglibConfig = requireNonNull(yanglibConfig);
73 this.dataBroker = requireNonNull(dataBroker);
74 schemaRepository = new SharedSchemaRepository("yang-library", parserFactory);
79 if (schemaListenerRegistration != null) {
80 schemaListenerRegistration.close();
85 if (Strings.isNullOrEmpty(yanglibConfig.getCacheFolder())) {
86 LOG.info("No cache-folder set in yanglib-config - yang library services will not be available");
90 final File cacheFolderFile = new File(yanglibConfig.getCacheFolder());
91 if (cacheFolderFile.exists()) {
92 LOG.info("cache-folder {} already exists", cacheFolderFile);
94 checkArgument(cacheFolderFile.mkdirs(), "cache-folder %s cannot be created", cacheFolderFile);
95 LOG.info("cache-folder {} was created", cacheFolderFile);
97 checkArgument(cacheFolderFile.isDirectory(), "cache-folder %s is not a directory", cacheFolderFile);
99 final FilesystemSchemaSourceCache<YangTextSchemaSource> cache =
100 new FilesystemSchemaSourceCache<>(schemaRepository, YangTextSchemaSource.class, cacheFolderFile);
101 schemaRepository.registerSchemaSourceListener(cache);
103 schemaListenerRegistration = schemaRepository.registerSchemaSourceListener(this);
105 LOG.info("Started yang library with sources from {}", cacheFolderFile);
109 public void schemaSourceEncountered(final SchemaSourceRepresentation source) {
114 public void schemaSourceRegistered(final Iterable<PotentialSchemaSource<?>> sources) {
115 final Map<ModuleKey, Module> newModules = new HashMap<>();
117 for (PotentialSchemaSource<?> potentialYangSource : Iterables.filter(sources, YANG_SCHEMA_SOURCE)) {
118 final YangIdentifier moduleName =
119 new YangIdentifier(potentialYangSource.getSourceIdentifier().name().getLocalName());
121 final Module newModule = new ModuleBuilder()
123 .setRevision(LegacyRevisionUtils.fromYangCommon(
124 Optional.ofNullable(potentialYangSource.getSourceIdentifier().revision())))
125 .setSchema(getUrlForModule(potentialYangSource.getSourceIdentifier()))
128 newModules.put(newModule.key(), newModule);
131 if (newModules.isEmpty()) {
132 // If no new yang modules then do nothing
136 WriteTransaction tx = dataBroker.newWriteOnlyTransaction();
137 tx.merge(LogicalDatastoreType.OPERATIONAL, InstanceIdentifier.create(ModulesState.class),
138 new ModulesStateBuilder().setModule(newModules).build());
140 tx.commit().addCallback(new FutureCallback<CommitInfo>() {
142 public void onSuccess(final CommitInfo result) {
143 LOG.debug("Modules state successfully populated with new modules");
147 public void onFailure(final Throwable throwable) {
148 LOG.warn("Unable to update modules state", throwable);
150 }, MoreExecutors.directExecutor());
154 public void schemaSourceUnregistered(final PotentialSchemaSource<?> source) {
155 if (!YANG_SCHEMA_SOURCE.apply(source)) {
156 // if representation of potential schema source is not yang text schema source do nothing
157 // we do not want to delete this module entry from module list
161 WriteTransaction tx = dataBroker.newWriteOnlyTransaction();
162 tx.delete(LogicalDatastoreType.OPERATIONAL, InstanceIdentifier.create(ModulesState.class)
163 .child(Module.class, new ModuleKey(new YangIdentifier(source.getSourceIdentifier().name().getLocalName()),
164 LegacyRevisionUtils.fromYangCommon(Optional.ofNullable(source.getSourceIdentifier().revision())))));
166 tx.commit().addCallback(new FutureCallback<CommitInfo>() {
168 public void onSuccess(final CommitInfo result) {
169 LOG.debug("Modules state successfully updated.");
173 public void onFailure(final Throwable throwable) {
174 LOG.warn("Unable to update modules state", throwable);
176 }, MoreExecutors.directExecutor());
180 public String getSchema(final String name, final String revision) {
181 LOG.debug("Attempting load for schema source {}:{}", name, revision);
182 final SourceIdentifier sourceId = new SourceIdentifier(name, revision.isEmpty() ? null : revision);
184 final ListenableFuture<YangTextSchemaSource> sourceFuture = schemaRepository.getSchemaSource(sourceId,
185 YangTextSchemaSource.class);
187 final YangTextSchemaSource source;
189 source = sourceFuture.get();
190 } catch (InterruptedException | ExecutionException e) {
191 throw new IllegalStateException("Unable to get schema " + sourceId, e);
195 return source.asCharSource(StandardCharsets.UTF_8).read();
196 } catch (IOException e) {
197 throw new IllegalStateException("Unable to read schema " + sourceId, e);
201 private Uri getUrlForModule(final SourceIdentifier sourceIdentifier) {
202 return new Uri("http://" + yanglibConfig.getBindingAddr() + ':' + yanglibConfig.getBindingPort()
203 + "/yanglib/schemas/" + sourceIdentifier.name().getLocalName() + '/' + revString(sourceIdentifier));
206 private static String revString(final SourceIdentifier id) {
207 final var rev = id.revision();
208 return rev != null ? rev.toString() : "";