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 com.google.common.collect.ImmutableList;
  11 import java.util.Collection;
  12 import java.util.Optional;
  13 import java.util.concurrent.ExecutorService;
  14 import javax.annotation.Nonnull;
  15 import org.opendaylight.mdsal.dom.api.DOMDataTreeChangeListener;
  16 import org.opendaylight.mdsal.dom.spi.AbstractDOMDataTreeChangeListenerRegistration;
  17 import org.opendaylight.mdsal.dom.spi.store.AbstractDOMStoreTreeChangePublisher;
  18 import org.opendaylight.yangtools.concepts.ListenerRegistration;
  19 import org.opendaylight.yangtools.util.concurrent.QueuedNotificationManager;
  20 import org.opendaylight.yangtools.util.concurrent.QueuedNotificationManager.BatchedInvoker;
  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.DataTreeCandidates;
  25 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeSnapshot;
  26 import org.slf4j.Logger;
  27 import org.slf4j.LoggerFactory;
  28
  29 final class InMemoryDOMStoreTreeChangePublisher extends AbstractDOMStoreTreeChangePublisher {
  30     private static final BatchedInvoker<AbstractDOMDataTreeChangeListenerRegistration<?>, DataTreeCandidate>
  31         MANAGER_INVOKER = (listener, notifications) -> {
  32             final DOMDataTreeChangeListener inst = listener.getInstance();
  33             if (inst != null) {
  34                 inst.onDataTreeChanged(ImmutableList.copyOf(notifications));
  35             }
  36         };
  37     private static final Logger LOG = LoggerFactory.getLogger(InMemoryDOMStoreTreeChangePublisher.class);
  38
  39     private final QueuedNotificationManager<AbstractDOMDataTreeChangeListenerRegistration<?>, DataTreeCandidate>
  40         notificationManager;
  41
  42     InMemoryDOMStoreTreeChangePublisher(final ExecutorService listenerExecutor, final int maxQueueSize) {
  43         notificationManager = QueuedNotificationManager.create(listenerExecutor, MANAGER_INVOKER, maxQueueSize,
  44                 "DataTreeChangeListenerQueueMgr");
  45     }
  46
  47     private InMemoryDOMStoreTreeChangePublisher(QueuedNotificationManager<
  48             AbstractDOMDataTreeChangeListenerRegistration<?>, DataTreeCandidate> notificationManager) {
  49         this.notificationManager = notificationManager;
  50     }
  51
  52     @Override
  53     protected void notifyListener(final AbstractDOMDataTreeChangeListenerRegistration<?> registration,
  54             final Collection<DataTreeCandidate> changes) {
  55         LOG.debug("Enqueueing candidates {} for registration {}", changes, registration);
  56         notificationManager.submitNotifications(registration, changes);
  57     }
  58
  59     @Override
  60     protected synchronized void registrationRemoved(
  61             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(
  68             final YangInstanceIdentifier treeId, final L listener, final DataTreeSnapshot snapshot) {
  69         final AbstractDOMDataTreeChangeListenerRegistration<L> reg = registerTreeChangeListener(treeId, listener);
  70
  71         final Optional<NormalizedNode<?, ?>> node = snapshot.readNode(YangInstanceIdentifier.EMPTY);
  72         if (node.isPresent()) {
  73             final DataTreeCandidate candidate = DataTreeCandidates.fromNormalizedNode(
  74                     YangInstanceIdentifier.EMPTY, node.get());
  75
  76             InMemoryDOMStoreTreeChangePublisher publisher =
  77                     new InMemoryDOMStoreTreeChangePublisher(notificationManager);
  78             publisher.registerTreeChangeListener(treeId, listener);
  79             publisher.publishChange(candidate);
  80         }
  81
  82         return reg;
  83     }
  84
  85     synchronized void publishChange(@Nonnull final DataTreeCandidate candidate) {
  86         // Runs synchronized with registrationRemoved()
  87         processCandidateTree(candidate);
  88     }
  89 }