renderers/iovisor/src/main/java/org/opendaylight/controller/config/yang/config/iovisor_provider/impl/IovisorProviderInstance.java

   1 /*
   2  * Copyright (c) 2016 Cisco System.  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.controller.config.yang.config.iovisor_provider.impl;
  10
  11 import com.google.common.base.Preconditions;
  12 import com.google.common.util.concurrent.Futures;
  13 import com.google.common.util.concurrent.ListenableFuture;
  14 import org.opendaylight.controller.config.yang.config.groupbasedpolicy.GroupbasedpolicyInstance;
  15 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
  16 import org.opendaylight.groupbasedpolicy.api.EpRendererAugmentationRegistry;
  17 import org.opendaylight.groupbasedpolicy.api.PolicyValidatorRegistry;
  18 import org.opendaylight.groupbasedpolicy.renderer.iovisor.IovisorRenderer;
  19 import org.opendaylight.mdsal.singleton.common.api.ClusterSingletonService;
  20 import org.opendaylight.mdsal.singleton.common.api.ClusterSingletonServiceProvider;
  21 import org.opendaylight.mdsal.singleton.common.api.ClusterSingletonServiceRegistration;
  22 import org.opendaylight.mdsal.singleton.common.api.ServiceGroupIdentifier;
  23 import org.slf4j.Logger;
  24 import org.slf4j.LoggerFactory;
  25
  26 public class IovisorProviderInstance implements ClusterSingletonService, AutoCloseable {
  27
  28     private static final Logger LOG = LoggerFactory.getLogger(IovisorProviderInstance.class);
  29
  30     private static final ServiceGroupIdentifier IDENTIFIER =
  31             ServiceGroupIdentifier.create(GroupbasedpolicyInstance.GBP_SERVICE_GROUP_IDENTIFIER);
  32     private final DataBroker dataBroker;
  33     private final EpRendererAugmentationRegistry epRegistry;
  34     private final PolicyValidatorRegistry policyValidator;
  35     private final ClusterSingletonServiceProvider clusteringServiceProvider;
  36     private ClusterSingletonServiceRegistration singletonServiceRegistration;
  37     private IovisorRenderer renderer;
  38
  39     public IovisorProviderInstance(final DataBroker dataBroker,
  40                                    final EpRendererAugmentationRegistry epRegistry,
  41                                    final PolicyValidatorRegistry policyValidator,
  42                                    final ClusterSingletonServiceProvider clusteringServiceProvider) {
  43         this.dataBroker = Preconditions.checkNotNull(dataBroker);
  44         this.epRegistry = Preconditions.checkNotNull(epRegistry);
  45         this.policyValidator = Preconditions.checkNotNull(policyValidator);
  46         this.clusteringServiceProvider = Preconditions.checkNotNull(clusteringServiceProvider);
  47     }
  48
  49     public void initialize() {
  50         LOG.info("Clustering session initiated for {}", this.getClass().getSimpleName());
  51         singletonServiceRegistration = clusteringServiceProvider.registerClusterSingletonService(this);
  52     }
  53
  54     @Override
  55     public void instantiateServiceInstance() {
  56         LOG.info("Instantiating {}", this.getClass().getSimpleName());
  57         renderer = new IovisorRenderer(dataBroker, epRegistry, policyValidator);
  58     }
  59
  60     @Override
  61     public ListenableFuture<Void> closeServiceInstance() {
  62         try {
  63             renderer.close();
  64         } catch (Exception e) {
  65             LOG.warn("Exception while closing ... ", e);
  66         }
  67         return Futures.immediateFuture(null);
  68     }
  69
  70     @Override
  71     public void close() {
  72         LOG.info("Clustering provider closed for {}", this.getClass().getSimpleName());
  73         if (singletonServiceRegistration != null) {
  74             try {
  75                 singletonServiceRegistration.close();
  76             } catch (Exception e) {
  77                 LOG.warn("{} closed unexpectedly. Cause: {}", e.getMessage());
  78             }
  79             singletonServiceRegistration = null;
  80         }
  81     }
  82
  83     @Override
  84     public ServiceGroupIdentifier getIdentifier() {
  85         return IDENTIFIER;
  86     }
  87 }