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