applications/forwardingrules-sync/src/main/java/org/opendaylight/openflowplugin/applications/frsync/impl/clustering/DeviceMastership.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 package org.opendaylight.openflowplugin.applications.frsync.impl.clustering;
   9
  10 import com.google.common.util.concurrent.Futures;
  11 import com.google.common.util.concurrent.ListenableFuture;
  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.opendaylight.mdsal.singleton.common.api.ServiceGroupIdentifier;
  16 import org.opendaylight.openflowplugin.applications.frsync.util.ReconciliationRegistry;
  17 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.NodeId;
  18 import org.slf4j.Logger;
  19 import org.slf4j.LoggerFactory;
  20
  21 /**
  22  * {@link ClusterSingletonService} clusterSingletonServiceRegistration per connected device.
  23  */
  24 public final class DeviceMastership implements ClusterSingletonService, AutoCloseable {
  25     private static final Logger LOG = LoggerFactory.getLogger(DeviceMastership.class);
  26     private final NodeId nodeId;
  27     private final ServiceGroupIdentifier identifier;
  28     private final ReconciliationRegistry reconciliationRegistry;
  29     private final ClusterSingletonServiceRegistration clusterSingletonServiceRegistration;
  30     private boolean deviceMastered;
  31
  32     public DeviceMastership(final NodeId nodeId,
  33                             final ReconciliationRegistry reconciliationRegistry,
  34                             final ClusterSingletonServiceProvider clusterSingletonService) {
  35         this.nodeId = nodeId;
  36         identifier = ServiceGroupIdentifier.create(nodeId.getValue());
  37         this.reconciliationRegistry = reconciliationRegistry;
  38         deviceMastered = false;
  39         clusterSingletonServiceRegistration = clusterSingletonService.registerClusterSingletonService(this);
  40     }
  41
  42     @Override
  43     public void instantiateServiceInstance() {
  44         LOG.debug("FRS started for: {}", nodeId.getValue());
  45         deviceMastered = true;
  46         reconciliationRegistry.register(nodeId);
  47     }
  48
  49     @Override
  50     public ListenableFuture<Void> closeServiceInstance() {
  51         LOG.debug("FRS stopped for: {}", nodeId.getValue());
  52         deviceMastered = false;
  53         reconciliationRegistry.unregisterIfRegistered(nodeId);
  54         return Futures.immediateFuture(null);
  55     }
  56
  57     @Override
  58     public ServiceGroupIdentifier getIdentifier() {
  59         return identifier;
  60     }
  61
  62     @Override
  63     @SuppressWarnings("checkstyle:IllegalCatch")
  64     public void close() {
  65         if (clusterSingletonServiceRegistration != null) {
  66             try {
  67                 clusterSingletonServiceRegistration.close();
  68             } catch (Exception e) {
  69                 LOG.error("FRS cluster service close fail: {}", nodeId.getValue(), e);
  70             }
  71         }
  72     }
  73
  74     public boolean isDeviceMastered() {
  75         return deviceMastered;
  76     }
  77
  78 }