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         try {
  52         singletonServiceRegistration = clusteringServiceProvider.registerClusterSingletonService(this);
  53         } catch (Exception e) {
  54             LOG.warn("Exception thrown while registering cluster singleton service in {}", this.getClass(), e.getMessage());
  55         }
  56     }
  57
  58     @Override
  59     public void instantiateServiceInstance() {
  60         LOG.info("Instantiating {}", this.getClass().getSimpleName());
  61         renderer = new IovisorRenderer(dataBroker, epRegistry, policyValidator);
  62     }
  63
  64     @Override
  65     public ListenableFuture<Void> closeServiceInstance() {
  66         try {
  67             renderer.close();
  68         } catch (Exception e) {
  69             LOG.warn("Exception while closing ... ", e);
  70         }
  71         return Futures.immediateFuture(null);
  72     }
  73
  74     @Override
  75     public void close() {
  76         LOG.info("Clustering provider closed for {}", this.getClass().getSimpleName());
  77         if (singletonServiceRegistration != null) {
  78             try {
  79                 singletonServiceRegistration.close();
  80             } catch (Exception e) {
  81                 LOG.warn("{} closed unexpectedly. Cause: {}", e.getMessage());
  82             }
  83             singletonServiceRegistration = null;
  84         }
  85     }
  86
  87     @Override
  88     public ServiceGroupIdentifier getIdentifier() {
  89         return IDENTIFIER;
  90     }
  91 }