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
   9 package org.opendaylight.openflowplugin.applications.frsync.impl.clustering;
  10
  11 import com.google.common.util.concurrent.Futures;
  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.ClusterSingletonServiceProvider;
  15 import org.opendaylight.mdsal.singleton.common.api.ClusterSingletonServiceRegistration;
  16 import org.opendaylight.mdsal.singleton.common.api.ServiceGroupIdentifier;
  17 import org.opendaylight.openflowplugin.applications.frsync.util.ReconciliationRegistry;
  18 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.NodeId;
  19 import org.slf4j.Logger;
  20 import org.slf4j.LoggerFactory;
  21
  22 /**
  23  * {@link ClusterSingletonService} clusterSingletonServiceRegistration per connected device.
  24  */
  25 public class DeviceMastership implements ClusterSingletonService, AutoCloseable {
  26     private static final Logger LOG = LoggerFactory.getLogger(DeviceMastership.class);
  27     private final NodeId nodeId;
  28     private final ServiceGroupIdentifier identifier;
  29     private final ReconciliationRegistry reconciliationRegistry;
  30     private final ClusterSingletonServiceRegistration clusterSingletonServiceRegistration;
  31     private boolean deviceMastered;
  32
  33     public DeviceMastership(final NodeId nodeId,
  34                             final ReconciliationRegistry reconciliationRegistry,
  35                             final ClusterSingletonServiceProvider clusterSingletonService) {
  36         this.nodeId = nodeId;
  37         this.identifier = ServiceGroupIdentifier.create(nodeId.getValue());
  38         this.reconciliationRegistry = reconciliationRegistry;
  39         this.deviceMastered = false;
  40         clusterSingletonServiceRegistration = clusterSingletonService.registerClusterSingletonService(this);
  41     }
  42
  43     @Override
  44     public void instantiateServiceInstance() {
  45         LOG.debug("FRS started for: {}", nodeId.getValue());
  46         deviceMastered = true;
  47         reconciliationRegistry.register(nodeId);
  48     }
  49
  50     @Override
  51     public ListenableFuture<Void> closeServiceInstance() {
  52         LOG.debug("FRS stopped for: {}", nodeId.getValue());
  53         deviceMastered = false;
  54         reconciliationRegistry.unregisterIfRegistered(nodeId);
  55         return Futures.immediateFuture(null);
  56     }
  57
  58     @Override
  59     public ServiceGroupIdentifier getIdentifier() {
  60         return identifier;
  61     }
  62
  63     @Override
  64     @SuppressWarnings("checkstyle:IllegalCatch")
  65     public void close() {
  66         if (clusterSingletonServiceRegistration != null) {
  67             try {
  68                 clusterSingletonServiceRegistration.close();
  69             } catch (Exception e) {
  70                 LOG.error("FRS cluster service close fail: {} {}", nodeId.getValue(), e);
  71             }
  72         }
  73     }
  74
  75     public boolean isDeviceMastered() {
  76         return deviceMastered;
  77     }
  78
  79 }