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