opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/ShardDataTreeChangePublisherActor.java

   1 /*
   2  * Copyright (c) 2017 Inocybe Technologies 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.cluster.datastore;
   9
  10 import static java.util.Objects.requireNonNull;
  11
  12 import akka.actor.Props;
  13 import java.util.Optional;
  14 import java.util.function.Consumer;
  15 import org.opendaylight.mdsal.dom.api.DOMDataTreeChangeListener;
  16 import org.opendaylight.yangtools.concepts.ListenerRegistration;
  17 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  18 import org.opendaylight.yangtools.yang.data.tree.api.DataTreeCandidate;
  19
  20 /**
  21  * Actor used to generate and publish DataTreeChange notifications.
  22  *
  23  * @author Thomas Pantelis
  24  */
  25 public final class ShardDataTreeChangePublisherActor
  26         extends ShardDataTreeNotificationPublisherActor<DefaultShardDataTreeChangeListenerPublisher> {
  27
  28     private ShardDataTreeChangePublisherActor(final String name, final String logContext) {
  29         super(new DefaultShardDataTreeChangeListenerPublisher(logContext), name, logContext);
  30     }
  31
  32     @Override
  33     protected void handleReceive(final Object message) {
  34         if (message instanceof RegisterListener) {
  35             RegisterListener reg = (RegisterListener)message;
  36             LOG.debug("{}: Received {}", logContext(), reg);
  37             if (reg.initialState.isPresent()) {
  38                 DefaultShardDataTreeChangeListenerPublisher.notifySingleListener(reg.path, reg.listener,
  39                         reg.initialState.get(), logContext());
  40             } else {
  41                 reg.listener.onInitialData();
  42             }
  43
  44             publisher().registerTreeChangeListener(reg.path, reg.listener, reg.onRegistration);
  45         } else {
  46             super.handleReceive(message);
  47         }
  48     }
  49
  50     static Props props(final String name, final String logContext) {
  51         return Props.create(ShardDataTreeChangePublisherActor.class, name, logContext);
  52     }
  53
  54     static class RegisterListener {
  55         private final YangInstanceIdentifier path;
  56         private final DOMDataTreeChangeListener listener;
  57         private final Optional<DataTreeCandidate> initialState;
  58         private final Consumer<ListenerRegistration<DOMDataTreeChangeListener>> onRegistration;
  59
  60         RegisterListener(final YangInstanceIdentifier path, final DOMDataTreeChangeListener listener,
  61                 final Optional<DataTreeCandidate> initialState,
  62                 final Consumer<ListenerRegistration<DOMDataTreeChangeListener>> onRegistration) {
  63             this.path = requireNonNull(path);
  64             this.listener = requireNonNull(listener);
  65             this.initialState = requireNonNull(initialState);
  66             this.onRegistration = requireNonNull(onRegistration);
  67         }
  68
  69         @Override
  70         public String toString() {
  71             return "RegisterListener [path=" + path + ", listener=" + listener + ", initialState present="
  72                     + initialState.isPresent() + "]";
  73         }
  74     }
  75 }