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.controller.sal.compatibility;
10 import java.util.Collections;
14 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
15 import org.opendaylight.controller.md.sal.binding.api.DataChangeListener;
16 import org.opendaylight.controller.md.sal.common.api.data.AsyncDataBroker.DataChangeScope;
17 import org.opendaylight.controller.md.sal.common.api.data.AsyncDataChangeEvent;
18 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
19 import org.opendaylight.yangtools.concepts.ListenerRegistration;
20 import org.opendaylight.yangtools.yang.binding.DataObject;
21 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
22 import org.slf4j.Logger;
23 import org.slf4j.LoggerFactory;
25 import com.google.common.base.Optional;
26 import com.google.common.base.Preconditions;
28 public abstract class AbstractDataChangeListener <T extends DataObject> implements AutoCloseable,DataChangeListener{
30 private static final Logger LOG = LoggerFactory.getLogger(AbstractDataChangeListener.class);
31 protected InventoryAndReadAdapter adapter;
32 protected final Class<T> clazz;
33 protected ListenerRegistration<DataChangeListener> listenerRegistration;
35 public AbstractDataChangeListener(final InventoryAndReadAdapter adapter, DataBroker db, final Class<T> clazz) {
36 this.adapter = Preconditions.checkNotNull(adapter, "InventoryAndReadAdapter can not be null!");
37 this.clazz = Preconditions.checkNotNull(clazz, "Class can not be null!");
38 Preconditions.checkNotNull(db, "DataBroker can not be null!");
39 registrationListener(db, 5);
43 public void onDataChanged(AsyncDataChangeEvent<InstanceIdentifier<?>, DataObject> changeEvent) {
44 Preconditions.checkNotNull(changeEvent,"Async ChangeEvent can not be null!");
45 /* All DataObjects for create */
46 final Map<InstanceIdentifier<?>, DataObject> createdData = changeEvent.getCreatedData() != null
47 ? changeEvent.getCreatedData() : Collections.<InstanceIdentifier<?>, DataObject> emptyMap();
48 /* All DataObjects for remove */
49 final Set<InstanceIdentifier<?>> removeData = changeEvent.getRemovedPaths() != null
50 ? changeEvent.getRemovedPaths() : Collections.<InstanceIdentifier<?>> emptySet();
51 /* All DataObjects for updates */
52 final Map<InstanceIdentifier<?>, DataObject> updateData = changeEvent.getUpdatedData() != null
53 ? changeEvent.getUpdatedData() : Collections.<InstanceIdentifier<?>, DataObject> emptyMap();
54 /* All Original DataObjects */
55 final Map<InstanceIdentifier<?>, DataObject> originalData = changeEvent.getOriginalData() != null
56 ? changeEvent.getOriginalData() : Collections.<InstanceIdentifier<?>, DataObject> emptyMap();
57 this.createData(createdData);
58 this.updateData(updateData, originalData);
59 this.removeData(removeData, originalData);
62 @SuppressWarnings("unchecked")
63 private void createData(final Map<InstanceIdentifier<?>, DataObject> createdData) {
64 final Set<InstanceIdentifier<?>> keys = createdData.keySet() != null
65 ? createdData.keySet() : Collections.<InstanceIdentifier<?>> emptySet();
66 for (InstanceIdentifier<?> key : keys) {
67 if (clazz.equals(key.getTargetType())) {
68 InstanceIdentifier<T> createKeyIdent = key.firstIdentifierOf(clazz);
69 final Optional<DataObject> value = Optional.of(createdData.get(key));
70 if (value.isPresent()) {
71 this.add(createKeyIdent, (T)value.get());
77 abstract protected void add(InstanceIdentifier<T> createKeyIdent, T node);
79 @SuppressWarnings("unchecked")
80 private void updateData(final Map<InstanceIdentifier<?>, DataObject> updateData, final Map<InstanceIdentifier<?>, DataObject> originalData) {
82 final Set<InstanceIdentifier<?>> keys = updateData.keySet() != null
83 ? updateData.keySet() : Collections.<InstanceIdentifier<?>> emptySet();
84 for (InstanceIdentifier<?> key : keys) {
85 if (clazz.equals(key.getTargetType())) {
86 InstanceIdentifier<T> updateKeyIdent = key.firstIdentifierOf(clazz);
87 final Optional<DataObject> value = Optional.of(updateData.get(key));
88 final Optional<DataObject> original = Optional.of(originalData.get(key));
89 if (value.isPresent() && original.isPresent()) {
90 this.update(updateKeyIdent, (T)original.get(), (T)value.get());
96 abstract protected void update(InstanceIdentifier<T> updateKeyIdent, T node,
99 @SuppressWarnings("unchecked")
100 private void removeData(final Set<InstanceIdentifier<?>> removeData, final Map<InstanceIdentifier<?>, DataObject> originalData) {
102 for (InstanceIdentifier<?> key : removeData) {
103 if (clazz.equals(key.getTargetType())) {
104 final InstanceIdentifier<T> ident = key.firstIdentifierOf(clazz);
105 final DataObject removeValue = originalData.get(key);
106 this.remove(ident, (T)removeValue);
111 abstract protected void remove(InstanceIdentifier<T> ident, T removeValue);
113 protected void registrationListener(final DataBroker db, int i) {
115 listenerRegistration = db.registerDataChangeListener(LogicalDatastoreType.OPERATIONAL,
116 getWildCardPath(), this, DataChangeScope.BASE);
117 } catch (final Exception e) {
121 } catch (InterruptedException e1) {
122 LOG.error("Thread interrupted '{}'", e1);
123 Thread.currentThread().interrupt();
125 registrationListener(db, --i);
127 LOG.error("AbstractDataChangeListener registration fail!", e);
128 throw new IllegalStateException("AbstractDataChangeListener registration Listener fail! System needs restart.", e);
133 protected abstract InstanceIdentifier<?> getWildCardPath();
136 public void close() {
137 if (listenerRegistration != null) {
139 listenerRegistration.close();
140 } catch (final Exception e) {
141 LOG.error("Error by stop AbstractDataChangeListener.", e);
143 listenerRegistration = null;