renderers/vpp/src/main/java/org/opendaylight/controller/config/yang/config/vpp_provider/impl/GbpVppProviderInstance.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.controller.config.yang.config.vpp_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.controller.sal.binding.api.BindingAwareBroker;
  17 import org.opendaylight.mdsal.singleton.common.api.ClusterSingletonService;
  18 import org.opendaylight.mdsal.singleton.common.api.ClusterSingletonServiceProvider;
  19 import org.opendaylight.mdsal.singleton.common.api.ClusterSingletonServiceRegistration;
  20 import org.opendaylight.mdsal.singleton.common.api.ServiceGroupIdentifier;
  21 import org.slf4j.Logger;
  22 import org.slf4j.LoggerFactory;
  23
  24 public class GbpVppProviderInstance implements ClusterSingletonService, AutoCloseable {
  25
  26     private static final Logger LOG = LoggerFactory.getLogger(GbpVppProviderInstance.class);
  27
  28     private static final ServiceGroupIdentifier IDENTIFIER =
  29             ServiceGroupIdentifier.create(GroupbasedpolicyInstance.GBP_SERVICE_GROUP_IDENTIFIER);
  30     private final DataBroker dataBroker;
  31     private final BindingAwareBroker bindingAwareBroker;
  32     private final ClusterSingletonServiceProvider clusterSingletonService;
  33     private ClusterSingletonServiceRegistration singletonServiceRegistration;
  34     private VppRenderer renderer;
  35
  36     public GbpVppProviderInstance(final DataBroker dataBroker,
  37                                   final BindingAwareBroker bindingAwareBroker,
  38                                   final ClusterSingletonServiceProvider clusterSingletonService) {
  39         this.dataBroker = Preconditions.checkNotNull(dataBroker);
  40         this.bindingAwareBroker = Preconditions.checkNotNull(bindingAwareBroker);
  41         this.clusterSingletonService = Preconditions.checkNotNull(clusterSingletonService);
  42     }
  43
  44     public void initialize() {
  45         LOG.info("Clustering session initiated for {}", this.getClass().getSimpleName());
  46         singletonServiceRegistration = clusterSingletonService.registerClusterSingletonService(this);
  47     }
  48
  49     @Override
  50     public void instantiateServiceInstance() {
  51         LOG.info("Instantiating {}", this.getClass().getSimpleName());
  52         renderer = new VppRenderer(dataBroker, bindingAwareBroker);
  53     }
  54
  55     @Override
  56     public ListenableFuture<Void> closeServiceInstance() {
  57         LOG.info("Instance {} closed", this.getClass().getSimpleName());
  58         try {
  59             renderer.close();
  60         } catch (Exception e) {
  61             LOG.warn("Exception while closing ... {}", e.getMessage());
  62         }
  63         return Futures.immediateFuture(null);
  64     }
  65
  66     @Override
  67     public void close() throws Exception {
  68
  69         LOG.info("Clustering provider closed for {}", this.getClass().getSimpleName());
  70         if (singletonServiceRegistration != null) {
  71             try {
  72                 singletonServiceRegistration.close();
  73             } catch (Exception e) {
  74                 LOG.warn("{} closed unexpectedly", this.getClass().getSimpleName(), e.getMessage());
  75             }
  76             singletonServiceRegistration = null;
  77         }
  78     }
  79
  80     @Override
  81     public ServiceGroupIdentifier getIdentifier() {
  82         return IDENTIFIER;
  83     }
  84 }