applications/forwardingrules-manager/src/main/java/org/opendaylight/openflowplugin/applications/frm/impl/DeviceMastership.java

   1 /**
   2  * Copyright (c) 2016 Pantheon Technologies s.r.o. 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.frm.impl;
  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.yang.gen.v1.urn.opendaylight.inventory.rev130819.NodeId;
  18 import org.slf4j.Logger;
  19 import org.slf4j.LoggerFactory;
  20
  21 /**
  22  * Service (per device) for registration in singleton provider.
  23  */
  24 public 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 ClusterSingletonServiceRegistration clusterSingletonServiceRegistration;
  29     private boolean deviceMastered;
  30
  31     public DeviceMastership(final NodeId nodeId, final ClusterSingletonServiceProvider clusterSingletonService) {
  32         this.nodeId = nodeId;
  33         this.identifier = ServiceGroupIdentifier.create(nodeId.getValue());
  34         this.deviceMastered = false;
  35         clusterSingletonServiceRegistration = clusterSingletonService.registerClusterSingletonService(this);
  36     }
  37
  38     @Override
  39     public void instantiateServiceInstance() {
  40         LOG.debug("FRM started for: {}", nodeId.getValue());
  41         deviceMastered = true;
  42     }
  43
  44     @Override
  45     public ListenableFuture<Void> closeServiceInstance() {
  46         LOG.debug("FRM stopped for: {}", nodeId.getValue());
  47         deviceMastered = false;
  48         return Futures.immediateFuture(null);
  49     }
  50
  51     @Override
  52     public ServiceGroupIdentifier getIdentifier() {
  53         return identifier;
  54     }
  55
  56     @Override
  57     public void close() {
  58         if (clusterSingletonServiceRegistration != null) {
  59             try {
  60                 clusterSingletonServiceRegistration.close();
  61             } catch (Exception e) {
  62                 LOG.error("FRM cluster service close fail: {} {}", nodeId.getValue(), e);
  63             }
  64         }
  65     }
  66
  67     public boolean isDeviceMastered() {
  68         return deviceMastered;
  69     }
  70
  71 }