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.md.sal.dom.store.impl;
10 import java.util.Collection;
11 import java.util.Collections;
12 import java.util.Optional;
13 import java.util.concurrent.ExecutorService;
14 import javax.annotation.Nonnull;
15 import org.opendaylight.controller.md.sal.dom.api.DOMDataTreeChangeListener;
16 import org.opendaylight.controller.md.sal.dom.spi.AbstractDOMDataTreeChangeListenerRegistration;
17 import org.opendaylight.controller.sal.core.spi.data.AbstractDOMStoreTreeChangePublisher;
18 import org.opendaylight.yangtools.concepts.ListenerRegistration;
19 import org.opendaylight.yangtools.util.concurrent.QueuedNotificationManager;
20 import org.opendaylight.yangtools.util.concurrent.QueuedNotificationManager.Invoker;
21 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
22 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
23 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidate;
24 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidateNode;
25 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidates;
26 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeSnapshot;
27 import org.slf4j.Logger;
28 import org.slf4j.LoggerFactory;
30 final class InMemoryDOMStoreTreeChangePublisher extends AbstractDOMStoreTreeChangePublisher {
31 private static final Invoker<AbstractDOMDataTreeChangeListenerRegistration<?>, DataTreeCandidate> MANAGER_INVOKER =
32 (listener, notification) -> {
33 // FIXME: this is inefficient, as we could grab the entire queue for the listener and post it
34 listener.getInstance().onDataTreeChanged(Collections.singletonList(notification));
37 private static final Logger LOG = LoggerFactory.getLogger(InMemoryDOMStoreTreeChangePublisher.class);
38 private final QueuedNotificationManager<AbstractDOMDataTreeChangeListenerRegistration<?>, DataTreeCandidate>
41 InMemoryDOMStoreTreeChangePublisher(final ExecutorService listenerExecutor, final int maxQueueSize) {
42 notificationManager = new QueuedNotificationManager<>(listenerExecutor, MANAGER_INVOKER, maxQueueSize,
43 "DataTreeChangeListenerQueueMgr");
46 private InMemoryDOMStoreTreeChangePublisher(QueuedNotificationManager<
47 AbstractDOMDataTreeChangeListenerRegistration<?>, DataTreeCandidate> notificationManager) {
48 this.notificationManager = notificationManager;
52 protected void notifyListeners(final Collection<AbstractDOMDataTreeChangeListenerRegistration<?>> registrations,
53 final YangInstanceIdentifier path, final DataTreeCandidateNode node) {
54 final DataTreeCandidate candidate = DataTreeCandidates.newDataTreeCandidate(path, node);
56 for (AbstractDOMDataTreeChangeListenerRegistration<?> reg : registrations) {
57 LOG.debug("Enqueueing candidate {} to registration {}", candidate, registrations);
58 notificationManager.submitNotification(reg, candidate);
63 protected synchronized void registrationRemoved(
64 final AbstractDOMDataTreeChangeListenerRegistration<?> registration) {
65 LOG.debug("Closing registration {}", registration);
67 // FIXME: remove the queue for this registration and make sure we clear it
70 <L extends DOMDataTreeChangeListener> ListenerRegistration<L> registerTreeChangeListener(
71 final YangInstanceIdentifier treeId, final L listener, final DataTreeSnapshot snapshot) {
72 final AbstractDOMDataTreeChangeListenerRegistration<L> reg = registerTreeChangeListener(treeId, listener);
74 final Optional<NormalizedNode<?, ?>> node = snapshot.readNode(YangInstanceIdentifier.EMPTY);
75 if (node.isPresent()) {
76 final DataTreeCandidate candidate = DataTreeCandidates.fromNormalizedNode(
77 YangInstanceIdentifier.EMPTY, node.get());
79 InMemoryDOMStoreTreeChangePublisher publisher =
80 new InMemoryDOMStoreTreeChangePublisher(notificationManager);
81 publisher.registerTreeChangeListener(treeId, listener);
82 publisher.publishChange(candidate);
88 synchronized void publishChange(@Nonnull final DataTreeCandidate candidate) {
89 // Runs synchronized with registrationRemoved()
90 processCandidateTree(candidate);