groupbasedpolicy/src/main/java/org/opendaylight/controller/config/yang/config/groupbasedpolicy/StatisticsManagerImplInstance.java

   1 /*
   2  * Copyright (c) 2016 Cisco Systems, Inc. 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.groupbasedpolicy;
  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.groupbasedpolicy.api.StatisticsManager;
  16 import org.opendaylight.groupbasedpolicy.statistics.StatisticsManagerImpl;
  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.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.statistics.rev151215.statistic.records.StatRecords;
  22 import org.slf4j.Logger;
  23 import org.slf4j.LoggerFactory;
  24
  25 public class StatisticsManagerImplInstance implements ClusterSingletonService, StatisticsManager, AutoCloseable {
  26
  27     private static final Logger LOG = LoggerFactory.getLogger(StatisticsManagerImplInstance.class);
  28
  29     private static final ServiceGroupIdentifier IDENTIFIER =
  30             ServiceGroupIdentifier.create(GroupbasedpolicyInstance.GBP_SERVICE_GROUP_IDENTIFIER);
  31     private final DataBroker dataBroker;
  32     private ClusterSingletonServiceProvider clusterSingletonService;
  33     private ClusterSingletonServiceRegistration singletonServiceRegistration;
  34     private StatisticsManagerImpl statsManager;
  35
  36     public StatisticsManagerImplInstance(final DataBroker dataBroker,
  37                                          final ClusterSingletonServiceProvider clusterSingletonService) {
  38         this.dataBroker = Preconditions.checkNotNull(dataBroker);
  39         this.clusterSingletonService = Preconditions.checkNotNull(clusterSingletonService);
  40     }
  41
  42     @Override
  43     public boolean writeStat(StatRecords record) {
  44         return statsManager.writeStat(record);
  45     }
  46
  47     @Override
  48     public StatRecords readStats() {
  49         return statsManager.readStats();
  50     }
  51
  52     public void initialize() {
  53         LOG.info("Clustering session initiated for {}", this.getClass().getSimpleName());
  54         singletonServiceRegistration = clusterSingletonService.registerClusterSingletonService(this);
  55     }
  56
  57     @Override
  58     public void instantiateServiceInstance() {
  59         LOG.info("Instantiating {}", this.getClass().getSimpleName());
  60         statsManager = new StatisticsManagerImpl(dataBroker);
  61     }
  62
  63     @Override
  64     public ListenableFuture<Void> closeServiceInstance() {
  65         LOG.info("Instance {} closed", this.getClass().getSimpleName());
  66         statsManager.close();
  67         return Futures.immediateFuture(null);
  68     }
  69
  70     @Override
  71     public void close() throws Exception {
  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", this.getClass().getSimpleName(), e);
  78             }
  79             singletonServiceRegistration = null;
  80         }
  81     }
  82
  83     @Override
  84     public ServiceGroupIdentifier getIdentifier() {
  85         return IDENTIFIER;
  86     }
  87 }