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.base.Optional;
  11 import com.google.common.collect.ImmutableList;
  12 import java.util.Collection;
  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     @Override
  48     protected void notifyListener(AbstractDOMDataTreeChangeListenerRegistration<?> registration,
  49             Collection<DataTreeCandidate> changes) {
  50         LOG.debug("Enqueueing candidates {} for registration {}", changes, registration);
  51         notificationManager.submitNotifications(registration, changes);
  52     }
  53
  54     @Override
  55     protected synchronized void registrationRemoved(
  56             final AbstractDOMDataTreeChangeListenerRegistration<?> registration) {
  57         LOG.debug("Closing registration {}", registration);
  58
  59         // FIXME: remove the queue for this registration and make sure we clear it
  60     }
  61
  62     <L extends DOMDataTreeChangeListener> ListenerRegistration<L> registerTreeChangeListener(
  63             final YangInstanceIdentifier treeId, final L listener, final DataTreeSnapshot snapshot) {
  64         final AbstractDOMDataTreeChangeListenerRegistration<L> reg = registerTreeChangeListener(treeId, listener);
  65
  66         final Optional<NormalizedNode<?, ?>> node = snapshot.readNode(treeId);
  67         if (node.isPresent()) {
  68             final DataTreeCandidate candidate = DataTreeCandidates.fromNormalizedNode(treeId, node.get());
  69             notificationManager.submitNotification(reg, candidate);
  70         }
  71
  72         return reg;
  73     }
  74
  75     synchronized void publishChange(@Nonnull final DataTreeCandidate candidate) {
  76         // Runs synchronized with registrationRemoved()
  77         processCandidateTree(candidate);
  78     }
  79 }