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 ClusterSingletonServiceProvider clusterSingletonServiceProvider;
  29     private ClusterSingletonServiceRegistration clusterSingletonServiceRegistration;
  30     private boolean deviceMastered;
  31
  32     public DeviceMastership(final NodeId nodeId, final ClusterSingletonServiceProvider clusterSingletonService) {
  33         this.nodeId = nodeId;
  34         this.identifier = ServiceGroupIdentifier.create(nodeId.getValue());
  35         this.deviceMastered = false;
  36         this.clusterSingletonServiceProvider = clusterSingletonService;
  37     }
  38
  39     @Override
  40     public void instantiateServiceInstance() {
  41         LOG.info("FRM started for: {}", nodeId.getValue());
  42         deviceMastered = true;
  43     }
  44
  45     @Override
  46     public ListenableFuture<Void> closeServiceInstance() {
  47         LOG.info("FRM stopped for: {}", nodeId.getValue());
  48         deviceMastered = false;
  49         return Futures.immediateFuture(null);
  50     }
  51
  52     @Override
  53     public ServiceGroupIdentifier getIdentifier() {
  54         return identifier;
  55     }
  56
  57     @Override
  58     public void close() {
  59         if (clusterSingletonServiceRegistration != null) {
  60             try {
  61                 clusterSingletonServiceRegistration.close();
  62             } catch (Exception e) {
  63                 LOG.error("FRM cluster service close fail: {} {}", nodeId.getValue(), e);
  64             }
  65         }
  66     }
  67
  68     public boolean isDeviceMastered() {
  69         return deviceMastered;
  70     }
  71
  72     public void registerClusterSingletonService() {
  73         LOG.info("Registering FRM as a cluster singleton service listner for service id : {}",getIdentifier());
  74         clusterSingletonServiceRegistration = clusterSingletonServiceProvider.registerClusterSingletonService(this);
  75     }
  76 }