renderers/faas/src/main/java/org/opendaylight/controller/config/yang/config/faas_provider/impl/FaasProviderInstance.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.faas_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.renderer.faas.FaasRenderer;
  18 import org.opendaylight.mdsal.singleton.common.api.ClusterSingletonService;
  19 import org.opendaylight.mdsal.singleton.common.api.ClusterSingletonServiceProvider;
  20 import org.opendaylight.mdsal.singleton.common.api.ClusterSingletonServiceRegistration;
  21 import org.opendaylight.mdsal.singleton.common.api.ServiceGroupIdentifier;
  22 import org.slf4j.Logger;
  23 import org.slf4j.LoggerFactory;
  24
  25 public class FaasProviderInstance implements ClusterSingletonService, AutoCloseable {
  26
  27     private static final Logger LOG = LoggerFactory.getLogger(FaasProviderInstance.class);
  28
  29     private static final ServiceGroupIdentifier IDENTIFIER =
  30             ServiceGroupIdentifier.create(GroupbasedpolicyInstance.GBP_SERVICE_GROUP_IDENTIFIER);
  31     private final DataBroker dataBroker;
  32     private final EpRendererAugmentationRegistry epRegistry;
  33     private final ClusterSingletonServiceProvider clusterSingletonService;
  34     private ClusterSingletonServiceRegistration singletonServiceRegistration;
  35     private FaasRenderer renderer;
  36
  37     public FaasProviderInstance(final DataBroker dataBroker,
  38                                 final EpRendererAugmentationRegistry epRegistry,
  39                                 final ClusterSingletonServiceProvider clusteringServiceProvider) {
  40         this.dataBroker = Preconditions.checkNotNull(dataBroker);
  41         this.epRegistry = Preconditions.checkNotNull(epRegistry);
  42         this.clusterSingletonService = Preconditions.checkNotNull(clusteringServiceProvider);
  43     }
  44
  45     public void initialize() {
  46         LOG.info("Clustering session initiated for {}", this.getClass().getSimpleName());
  47         singletonServiceRegistration = clusterSingletonService.registerClusterSingletonService(this);
  48     }
  49
  50     @Override
  51     public void instantiateServiceInstance() {
  52         LOG.info("Instantiating {}", this.getClass().getSimpleName());
  53         renderer = new FaasRenderer(dataBroker, epRegistry);
  54     }
  55
  56     @Override
  57     public ListenableFuture<Void> closeServiceInstance() {
  58         LOG.info("Instance {} closed", this.getClass().getSimpleName());
  59         try {
  60             renderer.close();
  61         } catch (Exception e) {
  62             LOG.warn("Exception while closing ... ", e);
  63         }
  64         return Futures.immediateFuture(null);
  65     }
  66
  67     @Override
  68     public void close() throws Exception {
  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 }