opendaylight/md-sal/sal-dom-broker/src/main/java/org/opendaylight/controller/md/sal/dom/clustering/impl/LegacyEntityOwnershipServiceAdapter.java

   1 /*
   2  * Copyright (c) 2016 Brocade Communications 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 package org.opendaylight.controller.md.sal.dom.clustering.impl;
   9
  10 import com.google.common.base.Optional;
  11 import com.google.common.base.Preconditions;
  12 import javax.annotation.Nonnull;
  13 import org.opendaylight.controller.md.sal.common.api.clustering.CandidateAlreadyRegisteredException;
  14 import org.opendaylight.controller.md.sal.common.api.clustering.Entity;
  15 import org.opendaylight.controller.md.sal.common.api.clustering.EntityOwnershipCandidateRegistration;
  16 import org.opendaylight.controller.md.sal.common.api.clustering.EntityOwnershipChange;
  17 import org.opendaylight.controller.md.sal.common.api.clustering.EntityOwnershipListener;
  18 import org.opendaylight.controller.md.sal.common.api.clustering.EntityOwnershipListenerRegistration;
  19 import org.opendaylight.controller.md.sal.common.api.clustering.EntityOwnershipService;
  20 import org.opendaylight.controller.md.sal.common.api.clustering.EntityOwnershipState;
  21 import org.opendaylight.mdsal.eos.dom.api.DOMEntity;
  22 import org.opendaylight.mdsal.eos.dom.api.DOMEntityOwnershipCandidateRegistration;
  23 import org.opendaylight.mdsal.eos.dom.api.DOMEntityOwnershipChange;
  24 import org.opendaylight.mdsal.eos.dom.api.DOMEntityOwnershipListener;
  25 import org.opendaylight.mdsal.eos.dom.api.DOMEntityOwnershipListenerRegistration;
  26 import org.opendaylight.mdsal.eos.dom.api.DOMEntityOwnershipService;
  27 import org.opendaylight.yangtools.concepts.AbstractObjectRegistration;
  28
  29 /**
  30  * Adapter that bridges between the legacy pre-Boron EntityOwnershipService and DOMEntityOwnershipService interfaces.
  31  *
  32  * @author Thomas Pantelis
  33  */
  34 public class LegacyEntityOwnershipServiceAdapter implements EntityOwnershipService, AutoCloseable {
  35     private final DOMEntityOwnershipService domService;
  36
  37     public LegacyEntityOwnershipServiceAdapter(@Nonnull DOMEntityOwnershipService domService) {
  38         this.domService = Preconditions.checkNotNull(domService);
  39     }
  40
  41     @Override
  42     public EntityOwnershipCandidateRegistration registerCandidate(Entity entity)
  43             throws CandidateAlreadyRegisteredException {
  44         try {
  45             return new EntityOwnershipCandidateRegistrationAdapter(domService.registerCandidate(
  46                     toDOMEntity(entity)), entity);
  47         } catch(org.opendaylight.mdsal.eos.common.api.CandidateAlreadyRegisteredException e) {
  48             throw new CandidateAlreadyRegisteredException(entity);
  49         }
  50     }
  51
  52     @Override
  53     public EntityOwnershipListenerRegistration registerListener(String entityType, EntityOwnershipListener listener) {
  54         return new EntityOwnershipListenerRegistrationAdapter(entityType, listener,
  55                 domService.registerListener(entityType, new DOMEntityOwnershipListenerAdapter(listener)));
  56     }
  57
  58     @Override
  59     public Optional<EntityOwnershipState> getOwnershipState(Entity forEntity) {
  60         return toEntityOwnershipState(domService.getOwnershipState(toDOMEntity(forEntity)));
  61     }
  62
  63     @Override
  64     public boolean isCandidateRegistered(Entity entity) {
  65         return domService.isCandidateRegistered(toDOMEntity(entity));
  66     }
  67
  68     @Override
  69     public void close() {
  70     }
  71
  72     private DOMEntity toDOMEntity(Entity from) {
  73         return new DOMEntity(from.getType(), from.getId());
  74     }
  75
  76     private Optional<EntityOwnershipState> toEntityOwnershipState(
  77             Optional<org.opendaylight.mdsal.eos.common.api.EntityOwnershipState> from) {
  78         if(!from.isPresent()) {
  79             return Optional.absent();
  80         }
  81
  82         org.opendaylight.mdsal.eos.common.api.EntityOwnershipState fromState = from.get();
  83         return Optional.of(new EntityOwnershipState(
  84                 fromState == org.opendaylight.mdsal.eos.common.api.EntityOwnershipState.IS_OWNER,
  85                 fromState != org.opendaylight.mdsal.eos.common.api.EntityOwnershipState.NO_OWNER));
  86     }
  87
  88     private static class EntityOwnershipCandidateRegistrationAdapter extends AbstractObjectRegistration<Entity>
  89             implements EntityOwnershipCandidateRegistration {
  90         private final DOMEntityOwnershipCandidateRegistration domRegistration;
  91
  92         EntityOwnershipCandidateRegistrationAdapter(DOMEntityOwnershipCandidateRegistration domRegistration,
  93                 Entity entity) {
  94             super(entity);
  95             this.domRegistration = Preconditions.checkNotNull(domRegistration);
  96         }
  97
  98         @Override
  99         protected void removeRegistration() {
 100             domRegistration.close();
 101         }
 102     }
 103
 104     private static class EntityOwnershipListenerRegistrationAdapter extends AbstractObjectRegistration<EntityOwnershipListener>
 105             implements EntityOwnershipListenerRegistration {
 106         private final String entityType;
 107         private final DOMEntityOwnershipListenerRegistration domRegistration;
 108
 109         EntityOwnershipListenerRegistrationAdapter(String entityType, EntityOwnershipListener listener,
 110                 DOMEntityOwnershipListenerRegistration domRegistration) {
 111             super(listener);
 112             this.entityType = Preconditions.checkNotNull(entityType);
 113             this.domRegistration = Preconditions.checkNotNull(domRegistration);
 114         }
 115
 116         @Override
 117         public String getEntityType() {
 118             return entityType;
 119         }
 120
 121         @Override
 122         protected void removeRegistration() {
 123             domRegistration.close();
 124         }
 125     }
 126
 127     private static class DOMEntityOwnershipListenerAdapter implements DOMEntityOwnershipListener {
 128         private final EntityOwnershipListener delegateListener;
 129
 130         DOMEntityOwnershipListenerAdapter(EntityOwnershipListener delegateListener) {
 131             this.delegateListener = Preconditions.checkNotNull(delegateListener);
 132         }
 133
 134         @Override
 135         public void ownershipChanged(DOMEntityOwnershipChange ownershipChange) {
 136             Entity entity = new Entity(ownershipChange.getEntity().getType(), ownershipChange.getEntity().
 137                     getIdentifier());
 138             delegateListener.ownershipChanged(new EntityOwnershipChange(entity,
 139                     ownershipChange.getState().wasOwner(), ownershipChange.getState().isOwner(),
 140                     ownershipChange.getState().hasOwner(), ownershipChange.inJeopardy()));
 141         }
 142     }
 143 }