2 * ============LICENSE_START========================================================================
3 * ONAP : ccsdk feature sdnr wt
4 * =================================================================================================
5 * Copyright (C) 2020 highstreet technologies GmbH Intellectual Property. All rights reserved.
6 * =================================================================================================
7 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
8 * in compliance with the License. You may obtain a copy of the License at
10 * http://www.apache.org/licenses/LICENSE-2.0
12 * Unless required by applicable law or agreed to in writing, software distributed under the License
13 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
14 * or implied. See the License for the specific language governing permissions and limitations under
16 * ============LICENSE_END==========================================================================
18 package org.onap.ccsdk.features.sdnr.wt.devicemanager.impl.util;
20 import com.google.common.util.concurrent.Futures;
21 import com.google.common.util.concurrent.ListenableFuture;
22 import org.eclipse.jdt.annotation.NonNull;
23 import org.opendaylight.mdsal.singleton.common.api.ClusterSingletonService;
24 import org.opendaylight.mdsal.singleton.common.api.ClusterSingletonServiceProvider;
25 import org.opendaylight.mdsal.singleton.common.api.ClusterSingletonServiceRegistration;
26 import org.opendaylight.mdsal.singleton.common.api.ServiceGroupIdentifier;
27 import org.slf4j.Logger;
28 import org.slf4j.LoggerFactory;
30 public class OdlClusterSingleton implements ClusterSingletonService, AutoCloseable {
32 private static final Logger LOG = LoggerFactory.getLogger(OdlClusterSingleton.class);
33 private final @NonNull ServiceGroupIdentifier ident;
34 private final ClusterSingletonServiceRegistration cssRegistration;
35 private volatile boolean master;
37 @SuppressWarnings("null")
38 public OdlClusterSingleton(ClusterSingletonServiceProvider clusterSingletonServiceProvider) {
39 this.ident = ServiceGroupIdentifier.create("ODLEventListenerHandler");
40 this.cssRegistration = clusterSingletonServiceProvider.registerClusterSingletonService(this);
45 public @NonNull ServiceGroupIdentifier getIdentifier() {
50 public void instantiateServiceInstance() {
51 LOG.debug("We take Leadership");
56 public ListenableFuture<? extends Object> closeServiceInstance() {
57 LOG.debug("We lost Leadership");
59 return Futures.immediateFuture(null);
62 public boolean isMaster() {
67 public void close() throws Exception {
68 if (cssRegistration != null) {
69 cssRegistration.close();