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.Collections;
  12 import java.util.concurrent.ExecutorService;
  13 import javax.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.util.concurrent.QueuedNotificationManager;
  18 import org.opendaylight.yangtools.util.concurrent.QueuedNotificationManager.Invoker;
  19 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  20 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidate;
  21 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidateNode;
  22 import org.opendaylight.yangtools.yang.data.api.schema.tree.spi.DefaultDataTreeCandidate;
  23 import org.slf4j.Logger;
  24 import org.slf4j.LoggerFactory;
  25
  26 final class InMemoryDOMStoreTreeChangePublisher extends AbstractDOMStoreTreeChangePublisher {
  27     private static final Invoker<AbstractDOMDataTreeChangeListenerRegistration<?>, DataTreeCandidate> MANAGER_INVOKER =
  28             new Invoker<AbstractDOMDataTreeChangeListenerRegistration<?>, DataTreeCandidate>() {
  29                 @Override
  30                 public void invokeListener(final AbstractDOMDataTreeChangeListenerRegistration<?> listener, final DataTreeCandidate notification) {
  31                     // FIXME: this is inefficient, as we could grab the entire queue for the listener and post it
  32                     final DOMDataTreeChangeListener inst = listener.getInstance();
  33                     if (inst != null) {
  34                         inst.onDataTreeChanged(Collections.singletonList(notification));
  35                     }
  36                 }
  37             };
  38     private static final Logger LOG = LoggerFactory.getLogger(InMemoryDOMStoreTreeChangePublisher.class);
  39     private final QueuedNotificationManager<AbstractDOMDataTreeChangeListenerRegistration<?>, DataTreeCandidate> notificationManager;
  40
  41     InMemoryDOMStoreTreeChangePublisher(final ExecutorService listenerExecutor, final int maxQueueSize) {
  42         notificationManager = new QueuedNotificationManager<>(listenerExecutor, MANAGER_INVOKER, maxQueueSize, "DataTreeChangeListenerQueueMgr");
  43     }
  44
  45     @Override
  46     protected void notifyListeners(final Collection<AbstractDOMDataTreeChangeListenerRegistration<?>> registrations, final YangInstanceIdentifier path, final DataTreeCandidateNode node) {
  47         final DataTreeCandidate candidate = new DefaultDataTreeCandidate(path, node);
  48
  49         for (AbstractDOMDataTreeChangeListenerRegistration<?> reg : registrations) {
  50             LOG.debug("Enqueueing candidate {} to registration {}", candidate, registrations);
  51             notificationManager.submitNotification(reg, candidate);
  52         }
  53     }
  54
  55     @Override
  56     protected synchronized void registrationRemoved(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     synchronized void publishChange(@Nonnull final DataTreeCandidate candidate) {
  63         // Runs synchronized with registrationRemoved()
  64         processCandidateTree(candidate);
  65     }
  66 }