opendaylight/md-sal/sal-inmemory-datastore/src/main/java/org/opendaylight/controller/md/sal/dom/store/impl/InMemoryDOMStoreTreeChangePublisher.java

   1 /*
   2  * Copyright (c) 2014 Cisco Systems, Inc. and others.  All rights reserved.
   3  *
   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
   7  */
   8 package org.opendaylight.controller.md.sal.dom.store.impl;
   9
  10 import java.util.Collection;
  11 import java.util.Optional;
  12 import java.util.concurrent.ExecutorService;
  13 import org.eclipse.jdt.annotation.NonNull;
  14 import org.opendaylight.controller.md.sal.dom.api.DOMDataTreeChangeListener;
  15 import org.opendaylight.controller.md.sal.dom.spi.AbstractDOMDataTreeChangeListenerRegistration;
  16 import org.opendaylight.controller.sal.core.spi.data.AbstractDOMStoreTreeChangePublisher;
  17 import org.opendaylight.yangtools.concepts.ListenerRegistration;
  18 import org.opendaylight.yangtools.util.concurrent.QueuedNotificationManager;
  19 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  20 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  21 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidate;
  22 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidateNode;
  23 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidates;
  24 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeSnapshot;
  25 import org.slf4j.Logger;
  26 import org.slf4j.LoggerFactory;
  27
  28 final class InMemoryDOMStoreTreeChangePublisher extends AbstractDOMStoreTreeChangePublisher {
  29     private static final Logger LOG = LoggerFactory.getLogger(InMemoryDOMStoreTreeChangePublisher.class);
  30
  31     private final QueuedNotificationManager<AbstractDOMDataTreeChangeListenerRegistration<?>, DataTreeCandidate>
  32             notificationManager;
  33
  34     InMemoryDOMStoreTreeChangePublisher(final ExecutorService listenerExecutor, final int maxQueueSize) {
  35         notificationManager = QueuedNotificationManager.create(listenerExecutor, (listener, notifications) -> {
  36             // FIXME: we are not checking for listener being closed
  37             listener.getInstance().onDataTreeChanged(notifications);
  38         }, maxQueueSize,
  39                 "DataTreeChangeListenerQueueMgr");
  40     }
  41
  42     private InMemoryDOMStoreTreeChangePublisher(final QueuedNotificationManager<
  43             AbstractDOMDataTreeChangeListenerRegistration<?>, DataTreeCandidate> notificationManager) {
  44         this.notificationManager = notificationManager;
  45     }
  46
  47     QueuedNotificationManager<AbstractDOMDataTreeChangeListenerRegistration<?>, DataTreeCandidate>
  48             getNotificationManager() {
  49         return notificationManager;
  50     }
  51
  52     @Override
  53     protected void notifyListeners(final Collection<AbstractDOMDataTreeChangeListenerRegistration<?>> registrations,
  54             final YangInstanceIdentifier path, final DataTreeCandidateNode node) {
  55         final DataTreeCandidate candidate = DataTreeCandidates.newDataTreeCandidate(path, node);
  56
  57         for (AbstractDOMDataTreeChangeListenerRegistration<?> reg : registrations) {
  58             LOG.debug("Enqueueing candidate {} to registration {}", candidate, registrations);
  59             notificationManager.submitNotification(reg, candidate);
  60         }
  61     }
  62
  63     @Override
  64     protected synchronized void registrationRemoved(
  65             final AbstractDOMDataTreeChangeListenerRegistration<?> registration) {
  66         LOG.debug("Closing registration {}", registration);
  67
  68         // FIXME: remove the queue for this registration and make sure we clear it
  69     }
  70
  71     <L extends DOMDataTreeChangeListener> ListenerRegistration<L> registerTreeChangeListener(
  72             final YangInstanceIdentifier treeId, final L listener, final DataTreeSnapshot snapshot) {
  73         final AbstractDOMDataTreeChangeListenerRegistration<L> reg = registerTreeChangeListener(treeId, listener);
  74
  75         final Optional<NormalizedNode<?, ?>> node = snapshot.readNode(YangInstanceIdentifier.empty());
  76         if (node.isPresent()) {
  77             final DataTreeCandidate candidate = DataTreeCandidates.fromNormalizedNode(
  78                     YangInstanceIdentifier.empty(), node.get());
  79
  80             InMemoryDOMStoreTreeChangePublisher publisher =
  81                     new InMemoryDOMStoreTreeChangePublisher(notificationManager);
  82             publisher.registerTreeChangeListener(treeId, listener);
  83             publisher.publishChange(candidate);
  84         }
  85
  86         return reg;
  87     }
  88
  89     synchronized void publishChange(final @NonNull DataTreeCandidate candidate) {
  90         // Runs synchronized with registrationRemoved()
  91         processCandidateTree(candidate);
  92     }
  93 }