mdsalutil/mdsalutil-api/src/main/java/org/opendaylight/genius/datastoreutils/listeners/AbstractDataTreeChangeListener.java

   1 /*
   2  * Copyright (c) 2017 Ericsson S.A. 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.genius.datastoreutils.listeners;
   9
  10 import javax.inject.Inject;
  11 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
  12 import org.opendaylight.controller.md.sal.binding.api.DataTreeChangeListener;
  13 import org.opendaylight.controller.md.sal.binding.api.DataTreeIdentifier;
  14 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  15 import org.opendaylight.yangtools.concepts.ListenerRegistration;
  16 import org.opendaylight.yangtools.yang.binding.DataObject;
  17 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  18
  19 abstract class AbstractDataTreeChangeListener<T extends DataObject> implements DataTreeChangeListener<T>,
  20         AutoCloseable {
  21     private final DataBroker dataBroker;
  22     private final ListenerRegistration<AbstractDataTreeChangeListener<T>> dataChangeListenerRegistration;
  23
  24     @Inject
  25     AbstractDataTreeChangeListener(DataBroker dataBroker, DataTreeIdentifier<T> dataTreeIdentifier) {
  26         this.dataBroker = dataBroker;
  27         dataChangeListenerRegistration = dataBroker.registerDataTreeChangeListener(dataTreeIdentifier, this);
  28     }
  29
  30     @Inject
  31     AbstractDataTreeChangeListener(DataBroker dataBroker, LogicalDatastoreType datastoreType,
  32                                    InstanceIdentifier<T> instanceIdentifier) {
  33         this(dataBroker, new DataTreeIdentifier<>(datastoreType, instanceIdentifier));
  34     }
  35
  36     public DataBroker getDataBroker() {
  37         return dataBroker;
  38     }
  39
  40     @Override
  41     public void close() {
  42         dataChangeListenerRegistration.close();
  43     }
  44 }
  45