singleton-service/mdsal-singleton-dom-impl/src/main/java/org/opendaylight/mdsal/singleton/dom/impl/OSGiClusterSingletonServiceProvider.java

   1 /*
   2  * Copyright (c) 2020 PANTHEON.tech, s.r.o. 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.mdsal.singleton.dom.impl;
   9
  10 import com.google.common.annotations.Beta;
  11 import org.opendaylight.mdsal.eos.dom.api.DOMEntityOwnershipService;
  12 import org.opendaylight.mdsal.singleton.common.api.ClusterSingletonService;
  13 import org.opendaylight.mdsal.singleton.common.api.ClusterSingletonServiceProvider;
  14 import org.opendaylight.mdsal.singleton.common.api.ClusterSingletonServiceRegistration;
  15 import org.osgi.service.component.annotations.Activate;
  16 import org.osgi.service.component.annotations.Component;
  17 import org.osgi.service.component.annotations.Deactivate;
  18 import org.osgi.service.component.annotations.Reference;
  19 import org.slf4j.Logger;
  20 import org.slf4j.LoggerFactory;
  21
  22 @Beta
  23 @Component(immediate = true, property = "type=default")
  24 public final class OSGiClusterSingletonServiceProvider implements ClusterSingletonServiceProvider {
  25     private static final Logger LOG = LoggerFactory.getLogger(OSGiClusterSingletonServiceProvider.class);
  26
  27     @Reference
  28     DOMEntityOwnershipService entityOwnershipService = null;
  29
  30     private DOMClusterSingletonServiceProviderImpl delegate;
  31
  32     @Override
  33     public ClusterSingletonServiceRegistration registerClusterSingletonService(final ClusterSingletonService service) {
  34         return delegate.registerClusterSingletonService(service);
  35     }
  36
  37     @Override
  38     public void close() {
  39         // Ignored on purpose
  40     }
  41
  42     @Activate
  43     void activate() {
  44         LOG.info("Cluster Singleton Service starting");
  45         delegate = new DOMClusterSingletonServiceProviderImpl(entityOwnershipService);
  46         delegate.initializeProvider();
  47         LOG.info("Cluster Singleton Service started");
  48     }
  49
  50     @Deactivate
  51     void deactivate() {
  52         LOG.info("Cluster Singleton Service stopping");
  53         delegate.close();
  54         delegate = null;
  55         LOG.info("Cluster Singleton Service stopped");
  56     }
  57 }