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.annotations.VisibleForTesting;
14 import com.google.common.base.Predicate;
15 import com.google.common.collect.Iterables;
16 import com.google.common.util.concurrent.FutureCallback;
17 import com.google.common.util.concurrent.MoreExecutors;
19 import java.io.IOException;
20 import java.util.HashMap;
21 import java.util.Optional;
22 import java.util.concurrent.ExecutionException;
23 import javax.annotation.PreDestroy;
24 import javax.inject.Inject;
25 import javax.inject.Singleton;
26 import javax.ws.rs.NotFoundException;
27 import javax.ws.rs.WebApplicationException;
28 import org.eclipse.jdt.annotation.NonNull;
29 import org.opendaylight.mdsal.binding.api.DataBroker;
30 import org.opendaylight.mdsal.binding.api.WriteTransaction;
31 import org.opendaylight.mdsal.common.api.CommitInfo;
32 import org.opendaylight.mdsal.common.api.LogicalDatastoreType;
33 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.Uri;
34 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.library.rev190104.LegacyRevisionUtils;
35 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.library.rev190104.ModulesState;
36 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.library.rev190104.ModulesStateBuilder;
37 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.library.rev190104.module.list.Module;
38 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.library.rev190104.module.list.ModuleBuilder;
39 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.library.rev190104.module.list.ModuleKey;
40 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.types.rev130715.YangIdentifier;
41 import org.opendaylight.yanglib.api.YangLibService;
42 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
43 import org.opendaylight.yangtools.yang.common.Uint32;
44 import org.opendaylight.yangtools.yang.model.repo.api.MissingSchemaSourceException;
45 import org.opendaylight.yangtools.yang.model.repo.api.SchemaSourceRepresentation;
46 import org.opendaylight.yangtools.yang.model.repo.api.SourceIdentifier;
47 import org.opendaylight.yangtools.yang.model.repo.api.YangTextSchemaSource;
48 import org.opendaylight.yangtools.yang.model.repo.fs.FilesystemSchemaSourceCache;
49 import org.opendaylight.yangtools.yang.model.repo.spi.PotentialSchemaSource;
50 import org.opendaylight.yangtools.yang.model.repo.spi.SchemaListenerRegistration;
51 import org.opendaylight.yangtools.yang.model.repo.spi.SchemaSourceListener;
52 import org.opendaylight.yangtools.yang.parser.api.YangParserFactory;
53 import org.opendaylight.yangtools.yang.parser.repo.SharedSchemaRepository;
54 import org.osgi.service.component.annotations.Activate;
55 import org.osgi.service.component.annotations.Component;
56 import org.osgi.service.component.annotations.Deactivate;
57 import org.osgi.service.component.annotations.Reference;
58 import org.osgi.service.metatype.annotations.AttributeDefinition;
59 import org.osgi.service.metatype.annotations.Designate;
60 import org.osgi.service.metatype.annotations.ObjectClassDefinition;
61 import org.slf4j.Logger;
62 import org.slf4j.LoggerFactory;
65 * Listens on new schema sources registered event. For each new source
66 * registered generates URL representing its schema source and write this URL
67 * along with source identifier to
68 * ietf-netconf-yang-library/modules-state/module list.
71 @Component(service = YangLibService.class, configurationPid = "org.opendaylight.netconf.yanglib")
72 @Designate(ocd = YangLibProvider.Configuration.class)
73 public final class YangLibProvider implements YangLibService, SchemaSourceListener, AutoCloseable {
74 @ObjectClassDefinition
75 public @interface Configuration {
76 @AttributeDefinition(min = "1",
77 description = "Local filesystem folder to use as cache + to load yang models from")
78 @NonNull String cache$_$folder() default "cache/schema";
81 description = "Binding address is necessary for generating proper URLS (accessible from the outside world) "
82 + "for models present directly in the library")
83 @NonNull String binding$_$address() default "localhost";
85 @AttributeDefinition(required = true, min = "1", max = "65535",
86 description = "binding port is necessary for generating proper URLS (accessible from the outside world) "
87 + "for models present directly in the library")
88 int binding$_$port() default 8181;
91 private static final Logger LOG = LoggerFactory.getLogger(YangLibProvider.class);
93 private static final Predicate<PotentialSchemaSource<?>> YANG_SCHEMA_SOURCE =
94 input -> YangTextSchemaSource.class.isAssignableFrom(input.getRepresentation());
96 private final DataBroker dataBroker;
97 private final String bindingAddress;
98 private final Uint32 bindingPort;
99 private final SharedSchemaRepository schemaRepository;
101 private final SchemaListenerRegistration schemaListenerRegistration;
105 public YangLibProvider(@Reference final @NonNull DataBroker dataBroker,
106 @Reference final @NonNull YangParserFactory parserFactory, final @NonNull Configuration configuration) {
107 this(dataBroker, parserFactory, configuration.cache$_$folder(), configuration.binding$_$address(),
108 Uint32.valueOf(configuration.binding$_$port()));
112 YangLibProvider(final @NonNull DataBroker dataBroker, final @NonNull YangParserFactory parserFactory,
113 final @NonNull String cacheFolder, final @NonNull String bindingAddress,
114 final @NonNull Uint32 bindingPort) {
115 this.bindingAddress = bindingAddress;
116 this.bindingPort = bindingPort;
117 this.dataBroker = requireNonNull(dataBroker);
119 final File cacheFolderFile = new File(cacheFolder);
120 if (cacheFolderFile.exists()) {
121 LOG.info("cache-folder {} already exists", cacheFolderFile);
123 checkArgument(cacheFolderFile.mkdirs(), "cache-folder %s cannot be created", cacheFolderFile);
124 LOG.info("cache-folder {} was created", cacheFolderFile);
126 checkArgument(cacheFolderFile.isDirectory(), "cache-folder %s is not a directory", cacheFolderFile);
128 schemaRepository = new SharedSchemaRepository("yang-library", parserFactory);
129 final var cache = new FilesystemSchemaSourceCache<>(schemaRepository, YangTextSchemaSource.class,
131 schemaRepository.registerSchemaSourceListener(cache);
133 schemaListenerRegistration = schemaRepository.registerSchemaSourceListener(this);
135 LOG.info("Started yang library with sources from {}", cacheFolderFile);
141 public void close() {
142 schemaListenerRegistration.close();
146 public void schemaSourceEncountered(final SchemaSourceRepresentation source) {
151 public void schemaSourceRegistered(final Iterable<PotentialSchemaSource<?>> sources) {
152 final var newModules = new HashMap<ModuleKey, Module>();
154 for (var potentialYangSource : Iterables.filter(sources, YANG_SCHEMA_SOURCE::test)) {
155 final var moduleName = new YangIdentifier(potentialYangSource.getSourceIdentifier().name().getLocalName());
157 final var newModule = new ModuleBuilder()
159 .setRevision(LegacyRevisionUtils.fromYangCommon(
160 Optional.ofNullable(potentialYangSource.getSourceIdentifier().revision())))
161 .setSchema(getUrlForModule(potentialYangSource.getSourceIdentifier()))
164 newModules.put(newModule.key(), newModule);
167 if (newModules.isEmpty()) {
168 // If no new yang modules then do nothing
172 WriteTransaction tx = dataBroker.newWriteOnlyTransaction();
173 tx.merge(LogicalDatastoreType.OPERATIONAL, InstanceIdentifier.create(ModulesState.class),
174 new ModulesStateBuilder().setModule(newModules).build());
176 tx.commit().addCallback(new FutureCallback<CommitInfo>() {
178 public void onSuccess(final CommitInfo result) {
179 LOG.debug("Modules state successfully populated with new modules");
183 public void onFailure(final Throwable throwable) {
184 LOG.warn("Unable to update modules state", throwable);
186 }, MoreExecutors.directExecutor());
190 public void schemaSourceUnregistered(final PotentialSchemaSource<?> source) {
191 if (!YANG_SCHEMA_SOURCE.test(source)) {
192 // if representation of potential schema source is not yang text schema source do nothing
193 // we do not want to delete this module entry from module list
197 WriteTransaction tx = dataBroker.newWriteOnlyTransaction();
198 tx.delete(LogicalDatastoreType.OPERATIONAL, InstanceIdentifier.create(ModulesState.class)
199 .child(Module.class, new ModuleKey(new YangIdentifier(source.getSourceIdentifier().name().getLocalName()),
200 LegacyRevisionUtils.fromYangCommon(Optional.ofNullable(source.getSourceIdentifier().revision())))));
202 tx.commit().addCallback(new FutureCallback<CommitInfo>() {
204 public void onSuccess(final CommitInfo result) {
205 LOG.debug("Modules state successfully updated.");
209 public void onFailure(final Throwable throwable) {
210 LOG.warn("Unable to update modules state", throwable);
212 }, MoreExecutors.directExecutor());
216 public String getSchema(final String name, final String revision) {
217 LOG.debug("Attempting load for schema source {}:{}", name, revision);
218 return getYangModel(name, revision.isEmpty() ? null : revision);
222 public String getSchema(final String name) {
223 LOG.debug("Attempting load for schema source {}: no-revision", name);
224 return getYangModel(name, null);
227 private String getYangModel(final String name, final String revision) {
228 final var sourceId = new SourceIdentifier(name, revision);
229 final var yangTextSchemaFuture = schemaRepository.getSchemaSource(sourceId, YangTextSchemaSource.class);
231 final var yangTextSchemaSource = yangTextSchemaFuture.get();
232 return yangTextSchemaSource.read();
233 } catch (ExecutionException e) {
234 if (e.getCause() instanceof MissingSchemaSourceException) {
235 throw new NotFoundException("Schema source " + sourceId + " not found", e);
237 throw new WebApplicationException("Unable to retrieve schema source " + sourceId, e);
238 } catch (IOException e) {
239 throw new WebApplicationException("Unable to read schema " + sourceId, e);
240 } catch (InterruptedException e) {
241 Thread.currentThread().interrupt();
242 throw new WebApplicationException("Retrieving schema source " + sourceId + " has been interrupted", e);
246 private Uri getUrlForModule(final SourceIdentifier sourceIdentifier) {
247 return new Uri("http://" + bindingAddress + ':' + bindingPort + "/yanglib/schemas/"
248 + sourceIdentifier.name().getLocalName() + revString(sourceIdentifier));
251 private static String revString(final SourceIdentifier id) {
252 final var rev = id.revision();
253 return rev != null ? "/" + rev : "";