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

   1 /*
   2  * Copyright (c) 2016 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.mdsal.singleton.dom.impl;
  10
  11 import com.google.common.base.Preconditions;
  12 import com.google.common.util.concurrent.ListenableFuture;
  13 import org.opendaylight.mdsal.singleton.common.api.ClusterSingletonService;
  14 import org.opendaylight.mdsal.singleton.common.api.ClusterSingletonServiceRegistration;
  15 import org.opendaylight.mdsal.singleton.common.api.ServiceGroupIdentifier;
  16
  17 /**
  18  * Package protected help class represent a Delegator for {@link ClusterSingletonService}
  19  * instance and {@link ClusterSingletonServiceRegistration} implementation.
  20  * Close registration means remove {@link ClusterSingletonService} instance from internal
  21  * ClusterSingletonServiceGroup list reference.
  22  *
  23  *<p>
  24  * Close {@link ClusterSingletonServiceRegistration} is prepared for a possible restart
  25  * service or application in osgi container. Any another services from group can not be
  26  * stopped.
  27  */
  28 class ClusterSingletonServiceRegistrationDelegator
  29         implements ClusterSingletonServiceRegistration, ClusterSingletonService {
  30
  31     private final ClusterSingletonService service;
  32     private final ClusterSingletonServiceGroup<?, ?, ?> group;
  33
  34     ClusterSingletonServiceRegistrationDelegator(final ClusterSingletonService service,
  35             final ClusterSingletonServiceGroup<?, ?, ?> group) {
  36         this.service = Preconditions.checkNotNull(service);
  37         this.group = Preconditions.checkNotNull(group);
  38     }
  39
  40     @Override
  41     public void close() throws Exception {
  42         group.unregisterService(this);
  43     }
  44
  45     @Override
  46     public void instantiateServiceInstance() {
  47         service.instantiateServiceInstance();
  48     }
  49
  50     @Override
  51     public ListenableFuture<Void> closeServiceInstance() {
  52         return service.closeServiceInstance();
  53     }
  54
  55     @Override
  56     public ServiceGroupIdentifier getIdentifier() {
  57         return service.getIdentifier();
  58     }
  59
  60     public String getServiceGroupIdentifier() {
  61         return service.getIdentifier().getValue();
  62     }
  63 }