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.restconf.nb.rfc8040.handlers;
10 import com.google.common.base.Preconditions;
11 import com.google.common.base.Throwables;
12 import java.util.Collection;
13 import java.util.concurrent.ExecutionException;
14 import java.util.concurrent.atomic.AtomicInteger;
15 import javax.annotation.PostConstruct;
16 import javax.annotation.PreDestroy;
17 import javax.inject.Inject;
18 import javax.inject.Singleton;
19 import org.apache.aries.blueprint.annotation.service.Reference;
20 import org.opendaylight.mdsal.common.api.LogicalDatastoreType;
21 import org.opendaylight.mdsal.common.api.TransactionCommitFailedException;
22 import org.opendaylight.mdsal.dom.api.DOMDataTreeWriteTransaction;
23 import org.opendaylight.mdsal.dom.api.DOMSchemaService;
24 import org.opendaylight.restconf.common.errors.RestconfDocumentedException;
25 import org.opendaylight.restconf.nb.rfc8040.Rfc8040.IetfYangLibrary;
26 import org.opendaylight.restconf.nb.rfc8040.Rfc8040.MonitoringModule;
27 import org.opendaylight.restconf.nb.rfc8040.utils.mapping.RestconfMappingNodeUtil;
28 import org.opendaylight.yangtools.concepts.ListenerRegistration;
29 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
30 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifier;
31 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.PathArgument;
32 import org.opendaylight.yangtools.yang.data.api.schema.DataContainerChild;
33 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
34 import org.opendaylight.yangtools.yang.data.api.schema.tree.ConflictingModificationAppliedException;
35 import org.opendaylight.yangtools.yang.model.api.Module;
36 import org.opendaylight.yangtools.yang.model.api.SchemaContext;
37 import org.opendaylight.yangtools.yang.model.api.SchemaContextListener;
38 import org.slf4j.Logger;
39 import org.slf4j.LoggerFactory;
42 * Implementation of {@link SchemaContextHandler}.
45 @SuppressWarnings("checkstyle:FinalClass")
46 public class SchemaContextHandler implements SchemaContextListenerHandler, AutoCloseable {
48 private static final Logger LOG = LoggerFactory.getLogger(SchemaContextHandler.class);
50 private final AtomicInteger moduleSetId = new AtomicInteger(0);
52 private final TransactionChainHandler transactionChainHandler;
53 private final DOMSchemaService domSchemaService;
54 private ListenerRegistration<SchemaContextListener> listenerRegistration;
56 private volatile SchemaContext schemaContext;
61 * @param transactionChainHandler Transaction chain handler
64 public SchemaContextHandler(final TransactionChainHandler transactionChainHandler,
65 final @Reference DOMSchemaService domSchemaService) {
66 this.transactionChainHandler = transactionChainHandler;
67 this.domSchemaService = domSchemaService;
71 public static SchemaContextHandler newInstance(final TransactionChainHandler transactionChainHandler,
72 final DOMSchemaService domSchemaService) {
73 return new SchemaContextHandler(transactionChainHandler, domSchemaService);
78 listenerRegistration = domSchemaService.registerSchemaContextListener(this);
84 if (listenerRegistration != null) {
85 listenerRegistration.close();
90 @SuppressWarnings("checkstyle:hiddenField")
91 public void onGlobalContextUpdated(final SchemaContext context) {
92 Preconditions.checkNotNull(context);
93 schemaContext = context;
95 final Module ietfYangLibraryModule =
96 context.findModule(IetfYangLibrary.MODULE_QNAME).orElse(null);
97 if (ietfYangLibraryModule != null) {
98 NormalizedNode<NodeIdentifier, Collection<DataContainerChild<? extends PathArgument, ?>>> normNode =
99 RestconfMappingNodeUtil.mapModulesByIetfYangLibraryYang(context.getModules(), ietfYangLibraryModule,
100 context, String.valueOf(this.moduleSetId.incrementAndGet()));
104 final Module monitoringModule =
105 schemaContext.findModule(MonitoringModule.MODULE_QNAME).orElse(null);
106 if (monitoringModule != null) {
107 NormalizedNode<NodeIdentifier, Collection<DataContainerChild<? extends PathArgument, ?>>> normNode =
108 RestconfMappingNodeUtil.mapCapabilites(monitoringModule);
114 public SchemaContext get() {
115 return schemaContext;
118 private void putData(
119 final NormalizedNode<NodeIdentifier, Collection<DataContainerChild<? extends PathArgument, ?>>> normNode) {
120 final DOMDataTreeWriteTransaction wTx = this.transactionChainHandler.get().newWriteOnlyTransaction();
121 wTx.put(LogicalDatastoreType.OPERATIONAL,
122 YangInstanceIdentifier.create(NodeIdentifier.create(normNode.getNodeType())), normNode);
125 } catch (InterruptedException e) {
126 throw new RestconfDocumentedException("Problem occurred while putting data to DS.", e);
127 } catch (ExecutionException e) {
128 final TransactionCommitFailedException failure = Throwables.getCauseAs(e,
129 TransactionCommitFailedException.class);
130 if (failure.getCause() instanceof ConflictingModificationAppliedException) {
132 * Ignore error when another cluster node is already putting the same data to DS.
133 * We expect that cluster is homogeneous and that node was going to write the same data
134 * (that means no retry is needed). Transaction chain reset must be invoked to be able
135 * to continue writing data with another transaction after failed transaction.
136 * This is workaround for bug https://bugs.opendaylight.org/show_bug.cgi?id=7728
138 LOG.warn("Ignoring that another cluster node is already putting the same data to DS.", e);
139 this.transactionChainHandler.reset();
141 throw new RestconfDocumentedException("Problem occurred while putting data to DS.", failure);