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 static java.util.Objects.requireNonNull;
12 import com.google.common.base.Throwables;
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.mdsal.dom.api.DOMTransactionChain;
25 import org.opendaylight.restconf.common.errors.RestconfDocumentedException;
26 import org.opendaylight.restconf.nb.rfc8040.Rfc8040.IetfYangLibrary;
27 import org.opendaylight.restconf.nb.rfc8040.utils.mapping.RestconfMappingNodeUtil;
28 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.restconf.monitoring.rev170126.RestconfState;
29 import org.opendaylight.yangtools.concepts.ListenerRegistration;
30 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
31 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifier;
32 import org.opendaylight.yangtools.yang.data.api.schema.ContainerNode;
33 import org.opendaylight.yangtools.yang.data.api.schema.tree.ConflictingModificationAppliedException;
34 import org.opendaylight.yangtools.yang.model.api.EffectiveModelContext;
35 import org.opendaylight.yangtools.yang.model.api.EffectiveModelContextListener;
36 import org.opendaylight.yangtools.yang.model.api.Module;
37 import org.slf4j.Logger;
38 import org.slf4j.LoggerFactory;
41 * Implementation of {@link SchemaContextHandler}.
43 // FIXME: this really is a service which is maintaining ietf-yang-library contents inside the datastore. It really
44 // should live in MD-SAL and be a dynamic store fragment. As a first step we should be turning this into a
45 // completely standalone application.
47 public class SchemaContextHandler implements EffectiveModelContextListener, 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<?> listenerRegistration;
56 private volatile EffectiveModelContext 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;
72 listenerRegistration = domSchemaService.registerSchemaContextListener(this);
78 if (listenerRegistration != null) {
79 listenerRegistration.close();
84 public void onModelContextUpdated(final EffectiveModelContext context) {
85 schemaContext = requireNonNull(context);
87 if (context.findModule(IetfYangLibrary.MODULE_QNAME).isPresent()) {
88 putData(RestconfMappingNodeUtil.mapModulesByIetfYangLibraryYang(context.getModules(), context,
89 String.valueOf(this.moduleSetId.incrementAndGet())));
92 final Module monitoringModule = schemaContext.findModule(RestconfState.QNAME.getModule()).orElse(null);
93 if (monitoringModule != null) {
94 putData(RestconfMappingNodeUtil.mapCapabilites(monitoringModule));
98 public EffectiveModelContext get() {
102 private void putData(final ContainerNode normNode) {
103 final DOMTransactionChain transactionChain = this.transactionChainHandler.get();
104 final DOMDataTreeWriteTransaction wTx = transactionChain.newWriteOnlyTransaction();
105 wTx.put(LogicalDatastoreType.OPERATIONAL,
106 YangInstanceIdentifier.create(NodeIdentifier.create(normNode.getIdentifier().getNodeType())), normNode);
109 } catch (InterruptedException e) {
110 throw new RestconfDocumentedException("Problem occurred while putting data to DS.", e);
111 } catch (ExecutionException e) {
112 final TransactionCommitFailedException failure = Throwables.getCauseAs(e,
113 TransactionCommitFailedException.class);
114 if (failure.getCause() instanceof ConflictingModificationAppliedException) {
116 * Ignore error when another cluster node is already putting the same data to DS.
117 * We expect that cluster is homogeneous and that node was going to write the same data
118 * (that means no retry is needed). Transaction chain reset must be invoked to be able
119 * to continue writing data with another transaction after failed transaction.
120 * This is workaround for bug https://bugs.opendaylight.org/show_bug.cgi?id=7728
122 LOG.warn("Ignoring that another cluster node is already putting the same data to DS.", e);
124 throw new RestconfDocumentedException("Problem occurred while putting data to DS.", failure);
127 transactionChain.close();