dom/mdsal-dom-inmemory-datastore/src/main/java/org/opendaylight/mdsal/dom/store/inmemory/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.mdsal.dom.store.inmemory;
   9
  10 import org.opendaylight.mdsal.dom.spi.store.AbstractDOMStoreTreeChangePublisher;
  11
  12 import org.opendaylight.mdsal.dom.spi.AbstractDOMDataTreeChangeListenerRegistration;
  13 import org.opendaylight.mdsal.dom.api.DOMDataTreeChangeListener;
  14 import com.google.common.base.Optional;
  15 import java.util.Collection;
  16 import java.util.Collections;
  17 import java.util.concurrent.ExecutorService;
  18 import javax.annotation.Nonnull;
  19 import org.opendaylight.yangtools.concepts.ListenerRegistration;
  20 import org.opendaylight.yangtools.util.concurrent.QueuedNotificationManager;
  21 import org.opendaylight.yangtools.util.concurrent.QueuedNotificationManager.Invoker;
  22 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  23 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  24 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidate;
  25 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidateNode;
  26 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidates;
  27 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeSnapshot;
  28 import org.slf4j.Logger;
  29 import org.slf4j.LoggerFactory;
  30
  31 final class InMemoryDOMStoreTreeChangePublisher extends AbstractDOMStoreTreeChangePublisher {
  32     private static final Invoker<AbstractDOMDataTreeChangeListenerRegistration<?>, DataTreeCandidate> MANAGER_INVOKER =
  33             new Invoker<AbstractDOMDataTreeChangeListenerRegistration<?>, DataTreeCandidate>() {
  34                 @Override
  35                 public void invokeListener(final AbstractDOMDataTreeChangeListenerRegistration<?> listener, final DataTreeCandidate notification) {
  36                     // FIXME: this is inefficient, as we could grab the entire queue for the listener and post it
  37                     final DOMDataTreeChangeListener inst = listener.getInstance();
  38                     if (inst != null) {
  39                         inst.onDataTreeChanged(Collections.singletonList(notification));
  40                     }
  41                 }
  42             };
  43     private static final Logger LOG = LoggerFactory.getLogger(InMemoryDOMStoreTreeChangePublisher.class);
  44     private final QueuedNotificationManager<AbstractDOMDataTreeChangeListenerRegistration<?>, DataTreeCandidate> notificationManager;
  45
  46     InMemoryDOMStoreTreeChangePublisher(final ExecutorService listenerExecutor, final int maxQueueSize) {
  47         notificationManager = new QueuedNotificationManager<>(listenerExecutor, MANAGER_INVOKER, maxQueueSize, "DataTreeChangeListenerQueueMgr");
  48     }
  49
  50     @Override
  51     protected void notifyListeners(final Collection<AbstractDOMDataTreeChangeListenerRegistration<?>> registrations, final YangInstanceIdentifier path, final DataTreeCandidateNode node) {
  52         final DataTreeCandidate candidate = DataTreeCandidates.newDataTreeCandidate(path, node);
  53
  54         for (AbstractDOMDataTreeChangeListenerRegistration<?> reg : registrations) {
  55             LOG.debug("Enqueueing candidate {} to registration {}", candidate, registrations);
  56             notificationManager.submitNotification(reg, candidate);
  57         }
  58     }
  59
  60     @Override
  61     protected synchronized void registrationRemoved(final AbstractDOMDataTreeChangeListenerRegistration<?> registration) {
  62         LOG.debug("Closing registration {}", registration);
  63
  64         // FIXME: remove the queue for this registration and make sure we clear it
  65     }
  66
  67     <L extends DOMDataTreeChangeListener> ListenerRegistration<L> registerTreeChangeListener(final YangInstanceIdentifier treeId, final L listener, final DataTreeSnapshot snapshot) {
  68         final AbstractDOMDataTreeChangeListenerRegistration<L> reg = registerTreeChangeListener(treeId, listener);
  69
  70         final Optional<NormalizedNode<?, ?>> node = snapshot.readNode(treeId);
  71         if (node.isPresent()) {
  72             final DataTreeCandidate candidate = DataTreeCandidates.fromNormalizedNode(treeId, node.get());
  73             notificationManager.submitNotification(reg, candidate);
  74         }
  75
  76         return reg;
  77     }
  78
  79     synchronized void publishChange(@Nonnull final DataTreeCandidate candidate) {
  80         // Runs synchronized with registrationRemoved()
  81         processCandidateTree(candidate);
  82     }
  83 }