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.MoreExecutors;
19 import java.io.IOException;
20 import java.nio.charset.StandardCharsets;
21 import java.util.HashMap;
23 import java.util.Optional;
24 import java.util.concurrent.ExecutionException;
25 import org.opendaylight.mdsal.binding.api.DataBroker;
26 import org.opendaylight.mdsal.binding.api.WriteTransaction;
27 import org.opendaylight.mdsal.common.api.CommitInfo;
28 import org.opendaylight.mdsal.common.api.LogicalDatastoreType;
29 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.Uri;
30 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.library.rev190104.LegacyRevisionUtils;
31 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.library.rev190104.ModulesState;
32 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.library.rev190104.ModulesStateBuilder;
33 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.library.rev190104.module.list.Module;
34 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.library.rev190104.module.list.ModuleBuilder;
35 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.library.rev190104.module.list.ModuleKey;
36 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.types.rev130715.YangIdentifier;
37 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.controller.yanglib.impl.rev141210.YanglibConfig;
38 import org.opendaylight.yanglib.api.YangLibService;
39 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
40 import org.opendaylight.yangtools.yang.model.repo.api.SchemaSourceRepresentation;
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.fs.FilesystemSchemaSourceCache;
44 import org.opendaylight.yangtools.yang.model.repo.spi.PotentialSchemaSource;
45 import org.opendaylight.yangtools.yang.model.repo.spi.SchemaListenerRegistration;
46 import org.opendaylight.yangtools.yang.model.repo.spi.SchemaSourceListener;
47 import org.opendaylight.yangtools.yang.parser.api.YangParserFactory;
48 import org.opendaylight.yangtools.yang.parser.repo.SharedSchemaRepository;
49 import org.slf4j.Logger;
50 import org.slf4j.LoggerFactory;
53 * Listens on new schema sources registered event. For each new source
54 * registered generates URL representing its schema source and write this URL
55 * along with source identifier to
56 * ietf-netconf-yang-library/modules-state/module list.
58 public class YangLibProvider implements AutoCloseable, SchemaSourceListener, YangLibService {
59 private static final Logger LOG = LoggerFactory.getLogger(YangLibProvider.class);
61 private static final Predicate<PotentialSchemaSource<?>> YANG_SCHEMA_SOURCE =
62 input -> YangTextSchemaSource.class.isAssignableFrom(input.getRepresentation());
64 private final DataBroker dataBroker;
65 private final YanglibConfig yanglibConfig;
66 private final SharedSchemaRepository schemaRepository;
67 private SchemaListenerRegistration schemaListenerRegistration;
69 public YangLibProvider(final YanglibConfig yanglibConfig, final DataBroker dataBroker,
70 final YangParserFactory parserFactory) {
71 this.yanglibConfig = requireNonNull(yanglibConfig);
72 this.dataBroker = requireNonNull(dataBroker);
73 schemaRepository = new SharedSchemaRepository("yang-library", parserFactory);
78 if (schemaListenerRegistration != null) {
79 schemaListenerRegistration.close();
84 if (Strings.isNullOrEmpty(yanglibConfig.getCacheFolder())) {
85 LOG.info("No cache-folder set in yanglib-config - yang library services will not be available");
89 final File cacheFolderFile = new File(yanglibConfig.getCacheFolder());
90 if (cacheFolderFile.exists()) {
91 LOG.info("cache-folder {} already exists", cacheFolderFile);
93 checkArgument(cacheFolderFile.mkdirs(), "cache-folder %s cannot be created", cacheFolderFile);
94 LOG.info("cache-folder {} was created", cacheFolderFile);
96 checkArgument(cacheFolderFile.isDirectory(), "cache-folder %s is not a directory", cacheFolderFile);
98 final FilesystemSchemaSourceCache<YangTextSchemaSource> cache =
99 new FilesystemSchemaSourceCache<>(schemaRepository, YangTextSchemaSource.class, cacheFolderFile);
100 schemaRepository.registerSchemaSourceListener(cache);
102 schemaListenerRegistration = schemaRepository.registerSchemaSourceListener(this);
104 LOG.info("Started yang library with sources from {}", cacheFolderFile);
108 public void schemaSourceEncountered(final SchemaSourceRepresentation source) {
113 public void schemaSourceRegistered(final Iterable<PotentialSchemaSource<?>> sources) {
114 final Map<ModuleKey, Module> newModules = new HashMap<>();
116 for (PotentialSchemaSource<?> potentialYangSource : Iterables.filter(sources, YANG_SCHEMA_SOURCE)) {
117 final YangIdentifier moduleName =
118 new YangIdentifier(potentialYangSource.getSourceIdentifier().name().getLocalName());
120 final Module newModule = new ModuleBuilder()
122 .setRevision(LegacyRevisionUtils.fromYangCommon(
123 Optional.ofNullable(potentialYangSource.getSourceIdentifier().revision())))
124 .setSchema(getUrlForModule(potentialYangSource.getSourceIdentifier()))
127 newModules.put(newModule.key(), newModule);
130 if (newModules.isEmpty()) {
131 // If no new yang modules then do nothing
135 WriteTransaction tx = dataBroker.newWriteOnlyTransaction();
136 tx.merge(LogicalDatastoreType.OPERATIONAL, InstanceIdentifier.create(ModulesState.class),
137 new ModulesStateBuilder().setModule(newModules).build());
139 tx.commit().addCallback(new FutureCallback<CommitInfo>() {
141 public void onSuccess(final CommitInfo result) {
142 LOG.debug("Modules state successfully populated with new modules");
146 public void onFailure(final Throwable throwable) {
147 LOG.warn("Unable to update modules state", throwable);
149 }, MoreExecutors.directExecutor());
153 public void schemaSourceUnregistered(final PotentialSchemaSource<?> source) {
154 if (!YANG_SCHEMA_SOURCE.apply(source)) {
155 // if representation of potential schema source is not yang text schema source do nothing
156 // we do not want to delete this module entry from module list
160 WriteTransaction tx = dataBroker.newWriteOnlyTransaction();
161 tx.delete(LogicalDatastoreType.OPERATIONAL, InstanceIdentifier.create(ModulesState.class)
162 .child(Module.class, new ModuleKey(new YangIdentifier(source.getSourceIdentifier().name().getLocalName()),
163 LegacyRevisionUtils.fromYangCommon(Optional.ofNullable(source.getSourceIdentifier().revision())))));
165 tx.commit().addCallback(new FutureCallback<CommitInfo>() {
167 public void onSuccess(final CommitInfo result) {
168 LOG.debug("Modules state successfully updated.");
172 public void onFailure(final Throwable throwable) {
173 LOG.warn("Unable to update modules state", throwable);
175 }, MoreExecutors.directExecutor());
179 public String getSchema(final String name, final String revision) {
180 LOG.debug("Attempting load for schema source {}:{}", name, revision);
181 return getYangModel(name, revision.isEmpty() ? null : revision);
185 public String getSchema(final String name) {
186 LOG.debug("Attempting load for schema source {}: no-revision", name);
187 return getYangModel(name, null);
190 private String getYangModel(final String name, final String revision) {
191 final var sourceId = new SourceIdentifier(name, revision);
192 final var yangTextSchemaFuture = schemaRepository.getSchemaSource(sourceId, YangTextSchemaSource.class);
194 final var yangTextSchemaSource = yangTextSchemaFuture.get();
195 return yangTextSchemaSource.asCharSource(StandardCharsets.UTF_8).read();
196 } catch (InterruptedException | ExecutionException e) {
197 throw new IllegalStateException("Unable to get schema " + sourceId, e);
198 } catch (IOException e) {
199 throw new IllegalStateException("Unable to read schema " + sourceId, e);
203 private Uri getUrlForModule(final SourceIdentifier sourceIdentifier) {
204 return new Uri("http://" + yanglibConfig.getBindingAddr() + ':' + yanglibConfig.getBindingPort()
205 + "/yanglib/schemas/" + sourceIdentifier.name().getLocalName() + revString(sourceIdentifier));
208 private static String revString(final SourceIdentifier id) {
209 final var rev = id.revision();
210 return rev != null ? "/" + rev : "";