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.io.ByteStreams;
17 import com.google.common.util.concurrent.FutureCallback;
18 import com.google.common.util.concurrent.ListenableFuture;
19 import com.google.common.util.concurrent.MoreExecutors;
21 import java.io.IOException;
22 import java.nio.charset.Charset;
23 import java.util.HashMap;
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.rev160621.ModulesState;
32 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.library.rev160621.ModulesStateBuilder;
33 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.library.rev160621.RevisionUtils;
34 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.library.rev160621.module.list.Module;
35 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.library.rev160621.module.list.ModuleBuilder;
36 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.library.rev160621.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.common.Revision;
42 import org.opendaylight.yangtools.yang.model.parser.api.YangParserFactory;
43 import org.opendaylight.yangtools.yang.model.repo.api.RevisionSourceIdentifier;
44 import org.opendaylight.yangtools.yang.model.repo.api.SchemaSourceRepresentation;
45 import org.opendaylight.yangtools.yang.model.repo.api.SourceIdentifier;
46 import org.opendaylight.yangtools.yang.model.repo.api.YangTextSchemaSource;
47 import org.opendaylight.yangtools.yang.model.repo.spi.PotentialSchemaSource;
48 import org.opendaylight.yangtools.yang.model.repo.spi.SchemaListenerRegistration;
49 import org.opendaylight.yangtools.yang.model.repo.spi.SchemaSourceListener;
50 import org.opendaylight.yangtools.yang.model.repo.util.FilesystemSchemaSourceCache;
51 import org.opendaylight.yangtools.yang.parser.repo.SharedSchemaRepository;
52 import org.slf4j.Logger;
53 import org.slf4j.LoggerFactory;
56 * Listens on new schema sources registered event. For each new source
57 * registered generates URL representing its schema source and write this URL
58 * along with source identifier to
59 * ietf-netconf-yang-library/modules-state/module list.
61 public class YangLibProvider implements AutoCloseable, SchemaSourceListener, YangLibService {
62 private static final Logger LOG = LoggerFactory.getLogger(YangLibProvider.class);
64 private static final Predicate<PotentialSchemaSource<?>> YANG_SCHEMA_SOURCE =
65 input -> YangTextSchemaSource.class.isAssignableFrom(input.getRepresentation());
67 private final DataBroker dataBroker;
68 private final YanglibConfig yanglibConfig;
69 private final SharedSchemaRepository schemaRepository;
70 private SchemaListenerRegistration schemaListenerRegistration;
72 public YangLibProvider(final YanglibConfig yanglibConfig, final DataBroker dataBroker,
73 final YangParserFactory parserFactory) {
74 this.yanglibConfig = requireNonNull(yanglibConfig);
75 this.dataBroker = requireNonNull(dataBroker);
76 this.schemaRepository = new SharedSchemaRepository("yang-library", parserFactory);
81 if (schemaListenerRegistration != null) {
82 schemaListenerRegistration.close();
87 if (Strings.isNullOrEmpty(yanglibConfig.getCacheFolder())) {
88 LOG.info("No cache-folder set in yanglib-config - yang library services will not be available");
92 final File cacheFolderFile = new File(yanglibConfig.getCacheFolder());
93 checkArgument(cacheFolderFile.exists(), "cache-folder %s does not exist", cacheFolderFile);
94 checkArgument(cacheFolderFile.isDirectory(), "cache-folder %s is not a directory", cacheFolderFile);
96 final FilesystemSchemaSourceCache<YangTextSchemaSource> cache =
97 new FilesystemSchemaSourceCache<>(schemaRepository, YangTextSchemaSource.class, cacheFolderFile);
98 schemaRepository.registerSchemaSourceListener(cache);
100 schemaListenerRegistration = schemaRepository.registerSchemaSourceListener(this);
102 LOG.info("Started yang library with sources from {}", cacheFolderFile);
106 public void schemaSourceEncountered(final SchemaSourceRepresentation source) {
111 public void schemaSourceRegistered(final Iterable<PotentialSchemaSource<?>> sources) {
112 final Map<ModuleKey, Module> newModules = new HashMap<>();
114 for (PotentialSchemaSource<?> potentialYangSource : Iterables.filter(sources, YANG_SCHEMA_SOURCE)) {
115 final YangIdentifier moduleName = new YangIdentifier(potentialYangSource.getSourceIdentifier().getName());
117 final Module newModule = new ModuleBuilder()
119 .setRevision(RevisionUtils.fromYangCommon(potentialYangSource.getSourceIdentifier().getRevision()))
120 .setSchema(getUrlForModule(potentialYangSource.getSourceIdentifier()))
123 newModules.put(newModule.key(), newModule);
126 if (newModules.isEmpty()) {
127 // If no new yang modules then do nothing
131 WriteTransaction tx = dataBroker.newWriteOnlyTransaction();
132 tx.merge(LogicalDatastoreType.OPERATIONAL, InstanceIdentifier.create(ModulesState.class),
133 new ModulesStateBuilder().setModule(newModules).build());
135 tx.commit().addCallback(new FutureCallback<CommitInfo>() {
137 public void onSuccess(final CommitInfo result) {
138 LOG.debug("Modules state successfully populated with new modules");
142 public void onFailure(final Throwable throwable) {
143 LOG.warn("Unable to update modules state", throwable);
145 }, MoreExecutors.directExecutor());
149 public void schemaSourceUnregistered(final PotentialSchemaSource<?> source) {
150 if (!YANG_SCHEMA_SOURCE.apply(source)) {
151 // if representation of potential schema source is not yang text schema source do nothing
152 // we do not want to delete this module entry from module list
156 WriteTransaction tx = dataBroker.newWriteOnlyTransaction();
157 tx.delete(LogicalDatastoreType.OPERATIONAL, InstanceIdentifier.create(ModulesState.class)
158 .child(Module.class, new ModuleKey(new YangIdentifier(source.getSourceIdentifier().getName()),
159 RevisionUtils.fromYangCommon(source.getSourceIdentifier().getRevision()))));
161 tx.commit().addCallback(new FutureCallback<CommitInfo>() {
163 public void onSuccess(final CommitInfo result) {
164 LOG.debug("Modules state successfully updated.");
168 public void onFailure(final Throwable throwable) {
169 LOG.warn("Unable to update modules state", throwable);
171 }, MoreExecutors.directExecutor());
175 public String getSchema(final String name, final String revision) {
176 LOG.debug("Attempting load for schema source {}:{}", name, revision);
177 final SourceIdentifier sourceId = RevisionSourceIdentifier.create(name,
178 revision.isEmpty() ? null : Revision.of(revision));
180 final ListenableFuture<YangTextSchemaSource> sourceFuture = schemaRepository.getSchemaSource(sourceId,
181 YangTextSchemaSource.class);
184 final YangTextSchemaSource source = sourceFuture.get();
185 return new String(ByteStreams.toByteArray(source.openStream()), Charset.defaultCharset());
186 } catch (InterruptedException | ExecutionException | IOException e) {
187 throw new IllegalStateException("Unable to get schema " + sourceId, e);
191 private Uri getUrlForModule(final SourceIdentifier sourceIdentifier) {
192 return new Uri("http://" + yanglibConfig.getBindingAddr() + ':' + yanglibConfig.getBindingPort()
193 + "/yanglib/schemas/" + sourceIdentifier.getName() + '/' + revString(sourceIdentifier));
196 private static String revString(final SourceIdentifier id) {
197 return id.getRevision().map(Revision::toString).orElse("");