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  * Close {@link ClusterSingletonServiceRegistration} is prepared for a possible restart
  24  * service or application in osgi container. Any another services from group can not be
  25  * stopped.
  26  */
  27 class ClusterSingletonServiceRegistrationDelegator
  28         implements ClusterSingletonServiceRegistration, ClusterSingletonService {
  29
  30     private final ClusterSingletonService service;
  31     private final ClusterSingletonServiceGroup<?, ?, ?> group;
  32
  33     ClusterSingletonServiceRegistrationDelegator(final ClusterSingletonService service,
  34             final ClusterSingletonServiceGroup<?, ?, ?> group) {
  35         this.service = Preconditions.checkNotNull(service);
  36         this.group = Preconditions.checkNotNull(group);
  37     }
  38
  39     @Override
  40     public void close() throws Exception {
  41         group.unregisterService(this);
  42     }
  43
  44     @Override
  45     public void instantiateServiceInstance() {
  46         service.instantiateServiceInstance();
  47     }
  48
  49     @Override
  50     public ListenableFuture<Void> closeServiceInstance() {
  51         return service.closeServiceInstance();
  52     }
  53
  54     @Override
  55     public ServiceGroupIdentifier getIdentifier() {
  56         return service.getIdentifier();
  57     }
  58
  59     public String getServiceGroupIdentifier() {
  60         return service.getIdentifier().getValue();
  61     }
  62 }