opendaylight/md-sal/sal-distributed-eos/src/main/java/org/opendaylight/controller/cluster/entityownership/AbstractEntityOwnerChangeListener.java

   1 /*
   2  * Copyright (c) 2015 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.cluster.entityownership;
   9
  10 import static org.opendaylight.controller.cluster.entityownership.EntityOwnersModel.ENTITY_OWNERS_PATH;
  11 import static org.opendaylight.controller.cluster.entityownership.EntityOwnersModel.ENTITY_OWNER_QNAME;
  12 import static org.opendaylight.controller.cluster.entityownership.EntityOwnersModel.ENTITY_QNAME;
  13
  14 import java.util.Optional;
  15 import org.opendaylight.controller.cluster.datastore.ShardDataTree;
  16 import org.opendaylight.mdsal.dom.api.DOMDataTreeChangeListener;
  17 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.controller.md.sal.clustering.entity.owners.rev150804.entity.owners.EntityType;
  18 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  19 import org.opendaylight.yangtools.yang.data.api.schema.LeafNode;
  20
  21 public abstract class AbstractEntityOwnerChangeListener implements DOMDataTreeChangeListener {
  22     private static final YangInstanceIdentifier EOS_PATH = YangInstanceIdentifier.builder(ENTITY_OWNERS_PATH)
  23             .node(EntityType.QNAME).node(EntityType.QNAME).node(ENTITY_QNAME).node(ENTITY_QNAME)
  24             .node(ENTITY_OWNER_QNAME).build();
  25
  26     void init(final ShardDataTree shardDataTree) {
  27         shardDataTree.registerTreeChangeListener(EOS_PATH, this, Optional.empty(), noop -> { /* NOOP */ });
  28     }
  29
  30     protected static String extractOwner(final LeafNode<?> ownerLeaf) {
  31         return ownerLeaf.getValue().toString();
  32     }
  33
  34 }