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

   1 /*
   2  * Copyright (c) 2016 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
   9 package org.opendaylight.controller.cluster.sharding;
  10
  11 import com.google.common.base.Preconditions;
  12 import java.util.Collection;
  13 import javax.annotation.Nonnull;
  14 import org.opendaylight.controller.cluster.databroker.actors.dds.DataStoreClient;
  15 import org.opendaylight.mdsal.dom.api.DOMDataTreeChangeListener;
  16 import org.opendaylight.mdsal.dom.api.DOMDataTreeIdentifier;
  17 import org.opendaylight.mdsal.dom.api.DOMDataTreeShard;
  18 import org.opendaylight.mdsal.dom.spi.shard.DOMDataTreeShardProducer;
  19 import org.opendaylight.mdsal.dom.spi.shard.ReadableWriteableDOMDataTreeShard;
  20 import org.opendaylight.yangtools.concepts.ListenerRegistration;
  21 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  22
  23 /**
  24  * Proxy implementation of a shard that creates forwarding producers to the backend shard.
  25  */
  26 class ShardFrontend implements ReadableWriteableDOMDataTreeShard {
  27
  28     private final DataStoreClient client;
  29     private final DOMDataTreeIdentifier shardRoot;
  30
  31     ShardFrontend(final DataStoreClient client,
  32                   final DOMDataTreeIdentifier shardRoot) {
  33         this.client = Preconditions.checkNotNull(client);
  34         this.shardRoot = Preconditions.checkNotNull(shardRoot);
  35     }
  36
  37     @Override
  38     public DOMDataTreeShardProducer createProducer(final Collection<DOMDataTreeIdentifier> paths) {
  39         return new ShardProxyProducer(shardRoot, paths, client);
  40     }
  41
  42     @Override
  43     public void onChildAttached(final DOMDataTreeIdentifier prefix, final DOMDataTreeShard child) {
  44         // TODO message directly into the shard
  45     }
  46
  47     @Override
  48     public void onChildDetached(final DOMDataTreeIdentifier prefix, final DOMDataTreeShard child) {
  49         // TODO message directly into the shard
  50     }
  51
  52     @Nonnull
  53     @Override
  54     public <L extends DOMDataTreeChangeListener> ListenerRegistration<L> registerTreeChangeListener(
  55             final YangInstanceIdentifier treeId, final L listener) {
  56         throw new UnsupportedOperationException("Registering data tree change listener is not supported");
  57     }
  58 }