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.yangtools.sal.binding.generator.impl;
10 import com.google.common.base.Optional;
11 import com.google.common.collect.ImmutableList;
12 import com.google.common.collect.ImmutableSet;
13 import java.io.IOException;
14 import java.io.InputStream;
15 import java.lang.ref.WeakReference;
17 import java.util.concurrent.ConcurrentHashMap;
18 import java.util.concurrent.ConcurrentMap;
19 import org.opendaylight.yangtools.concepts.AbstractObjectRegistration;
20 import org.opendaylight.yangtools.concepts.ObjectRegistration;
21 import org.opendaylight.yangtools.sal.binding.generator.api.ClassLoadingStrategy;
22 import org.opendaylight.yangtools.sal.binding.generator.api.ModuleInfoRegistry;
23 import org.opendaylight.yangtools.util.ClassLoaderUtils;
24 import org.opendaylight.yangtools.yang.binding.YangModuleInfo;
25 import org.opendaylight.yangtools.yang.binding.util.BindingReflections;
26 import org.opendaylight.yangtools.yang.model.api.Module;
27 import org.opendaylight.yangtools.yang.model.api.SchemaContext;
28 import org.opendaylight.yangtools.yang.model.api.SchemaContextProvider;
29 import org.opendaylight.yangtools.yang.model.repo.api.SourceIdentifier;
30 import org.opendaylight.yangtools.yang.parser.impl.YangParserImpl;
31 import org.slf4j.Logger;
32 import org.slf4j.LoggerFactory;
34 public class ModuleInfoBackedContext extends GeneratedClassLoadingStrategy //
36 ModuleInfoRegistry, SchemaContextProvider {
38 private ModuleInfoBackedContext(final ClassLoadingStrategy loadingStrategy) {
39 this.backingLoadingStrategy = loadingStrategy;
42 public static ModuleInfoBackedContext create() {
43 return new ModuleInfoBackedContext(getTCCLClassLoadingStrategy());
46 public static ModuleInfoBackedContext create(final ClassLoadingStrategy loadingStrategy) {
47 return new ModuleInfoBackedContext(loadingStrategy);
50 private static final Logger LOG = LoggerFactory.getLogger(ModuleInfoBackedContext.class);
52 private final ConcurrentMap<String, WeakReference<ClassLoader>> packageNameToClassLoader = new ConcurrentHashMap<>();
53 private final ConcurrentMap<SourceIdentifier, YangModuleInfo> sourceIdentifierToModuleInfo = new ConcurrentHashMap<>();
55 private final ClassLoadingStrategy backingLoadingStrategy;
58 public Class<?> loadClass(final String fullyQualifiedName) throws ClassNotFoundException {
59 String modulePackageName = BindingReflections.getModelRootPackageName(fullyQualifiedName);
61 WeakReference<ClassLoader> classLoaderRef = packageNameToClassLoader.get(modulePackageName);
62 ClassLoader classloader = null;
63 if (classLoaderRef != null && (classloader = classLoaderRef.get()) != null) {
64 return ClassLoaderUtils.loadClass(classloader, fullyQualifiedName);
66 if (backingLoadingStrategy == null) {
67 throw new ClassNotFoundException(fullyQualifiedName);
69 Class<?> cls = backingLoadingStrategy.loadClass(fullyQualifiedName);
70 if (BindingReflections.isBindingClass(cls)) {
71 boolean newModule = resolveModuleInfo(cls);
73 recreateSchemaContext();
80 private synchronized Optional<SchemaContext> recreateSchemaContext() {
82 ImmutableList<InputStream> streams = getAvailableStreams();
83 YangParserImpl parser = new YangParserImpl();
84 Set<Module> modules = parser.parseYangModelsFromStreams(streams);
85 SchemaContext schemaContext = parser.resolveSchemaContext(modules);
86 return Optional.of(schemaContext);
87 } catch (IOException e) {
88 LOG.error("Schema was not recreated.",e);
90 return Optional.absent();
93 // TODO finish schema parsing and expose as SchemaService
94 // Unite with current SchemaService
95 // Implement remove ModuleInfo to update SchemaContext
97 public synchronized Optional<SchemaContext> tryToCreateSchemaContext() {
98 return recreateSchemaContext();
101 private ImmutableList<InputStream> getAvailableStreams() throws IOException {
102 ImmutableSet<YangModuleInfo> moduleInfos = ImmutableSet.copyOf(sourceIdentifierToModuleInfo.values());
104 ImmutableList.Builder<InputStream> sourceStreams = ImmutableList.<InputStream> builder();
105 for (YangModuleInfo moduleInfo : moduleInfos) {
106 sourceStreams.add(moduleInfo.getModuleSourceStream());
108 return sourceStreams.build();
111 private boolean resolveModuleInfo(final Class<?> cls) {
113 return resolveModuleInfo(BindingReflections.getModuleInfo(cls));
114 } catch (Exception e) {
115 throw new IllegalStateException(String.format("Failed to resolve module information for class %s", cls), e);
119 private boolean resolveModuleInfo(final YangModuleInfo moduleInfo) {
121 SourceIdentifier identifier = sourceIdentifierFrom(moduleInfo);
122 YangModuleInfo previous = sourceIdentifierToModuleInfo.putIfAbsent(identifier, moduleInfo);
123 ClassLoader moduleClassLoader = moduleInfo.getClass().getClassLoader();
124 if (previous == null) {
125 String modulePackageName = moduleInfo.getClass().getPackage().getName();
126 packageNameToClassLoader.putIfAbsent(modulePackageName, new WeakReference<ClassLoader>(moduleClassLoader));
128 for (YangModuleInfo importedInfo : moduleInfo.getImportedModules()) {
129 resolveModuleInfo(importedInfo);
137 private static SourceIdentifier sourceIdentifierFrom(final YangModuleInfo moduleInfo) {
138 return SourceIdentifier.create(moduleInfo.getName(), Optional.of(moduleInfo.getRevision()));
141 public void addModuleInfos(final Iterable<? extends YangModuleInfo> moduleInfos) {
142 for (YangModuleInfo yangModuleInfo : moduleInfos) {
143 registerModuleInfo(yangModuleInfo);
148 public ObjectRegistration<YangModuleInfo> registerModuleInfo(final YangModuleInfo yangModuleInfo) {
149 YangModuleInfoRegistration registration = new YangModuleInfoRegistration(yangModuleInfo, this);
151 resolveModuleInfo(yangModuleInfo);
156 private static class YangModuleInfoRegistration extends AbstractObjectRegistration<YangModuleInfo> {
158 private final ModuleInfoBackedContext context;
160 public YangModuleInfoRegistration(final YangModuleInfo instance, final ModuleInfoBackedContext context) {
162 this.context = context;
166 protected void removeRegistration() {
167 context.remove(this);
172 private void remove(final YangModuleInfoRegistration registration) {
177 public SchemaContext getSchemaContext() {
178 final Optional<SchemaContext> contextOptional = tryToCreateSchemaContext();
179 if (contextOptional.isPresent()) {
180 return contextOptional.get();
183 throw new IllegalStateException("Unable to recreate SchemaContext, error while parsing");