opendaylight/md-sal/forwardingrules-manager/src/main/java/org/opendaylight/controller/frm/group/GroupProvider.java

   1 /**
   2  * Copyright (c) 2014 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 package org.opendaylight.controller.frm.group;
   9
  10 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
  11 import org.opendaylight.controller.md.sal.binding.api.DataChangeListener;
  12 import org.opendaylight.controller.md.sal.common.api.data.AsyncDataBroker.DataChangeScope;
  13 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  14 import org.opendaylight.controller.sal.binding.api.RpcConsumerRegistry;
  15 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.FlowCapableNode;
  16 import org.opendaylight.yang.gen.v1.urn.opendaylight.group.service.rev130918.SalGroupService;
  17 import org.opendaylight.yang.gen.v1.urn.opendaylight.group.types.rev131018.groups.Group;
  18 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.Nodes;
  19 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.nodes.Node;
  20 import org.opendaylight.yangtools.concepts.ListenerRegistration;
  21 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  22 import org.slf4j.Logger;
  23 import org.slf4j.LoggerFactory;
  24
  25 import com.google.common.base.Preconditions;
  26
  27 /**
  28  * Group Provider registers the {@link GroupChangeListener} and it holds all needed
  29  * services for {@link GroupChangeListener}.
  30  *
  31  * @author <a href="mailto:vdemcak@cisco.com">Vaclav Demcak</a>
  32  *
  33  */
  34 public class GroupProvider implements AutoCloseable {
  35
  36     private static final Logger LOG = LoggerFactory.getLogger(GroupProvider.class);
  37
  38     private SalGroupService salGroupService;
  39     private DataBroker dataService;
  40
  41     /* DataChangeListener */
  42     private DataChangeListener groupDataChangeListener;
  43     private ListenerRegistration<DataChangeListener> groupDataChangeListenerRegistration;
  44
  45     /**
  46      * Provider Initialization Phase.
  47      *
  48      * @param DataProviderService dataService
  49      */
  50     public void init (final DataBroker dataService) {
  51         LOG.info("FRM Group Config Provider initialization.");
  52         this.dataService = Preconditions.checkNotNull(dataService, "DataService can not be null !");
  53     }
  54
  55     /**
  56      * Listener Registration Phase
  57      *
  58      * @param RpcConsumerRegistry rpcRegistry
  59      */
  60     public void start(final RpcConsumerRegistry rpcRegistry) {
  61         Preconditions.checkArgument(rpcRegistry != null, "RpcConsumerRegistry can not be null !");
  62
  63         this.salGroupService = Preconditions.checkNotNull(rpcRegistry.getRpcService(SalGroupService.class),
  64                 "RPC SalGroupService not found.");
  65
  66         /* Build Path */
  67         InstanceIdentifier<Group> groupIdentifier = InstanceIdentifier.create(Nodes.class)
  68                 .child(Node.class).augmentation(FlowCapableNode.class).child(Group.class);
  69
  70         /* DataChangeListener registration */
  71         this.groupDataChangeListener = new GroupChangeListener(GroupProvider.this);
  72         this.groupDataChangeListenerRegistration = this.dataService.registerDataChangeListener(
  73                 LogicalDatastoreType.CONFIGURATION, groupIdentifier, groupDataChangeListener, DataChangeScope.SUBTREE);
  74
  75         LOG.info("FRM Group Config Provider started.");
  76     }
  77
  78     @Override
  79     public void close() {
  80         LOG.info("FRM Group Config Provider stopped.");
  81         if (groupDataChangeListenerRegistration != null) {
  82             try {
  83                 groupDataChangeListenerRegistration.close();
  84             } catch (Exception e) {
  85                 String errMsg = "Error by stop FRM Group Config Provider.";
  86                 LOG.error(errMsg, e);
  87                 throw new IllegalStateException(errMsg, e);
  88             } finally {
  89                 groupDataChangeListenerRegistration = null;
  90             }
  91         }
  92     }
  93
  94     public DataChangeListener getGroupDataChangeListener() {
  95         return groupDataChangeListener;
  96     }
  97
  98     public SalGroupService getSalGroupService() {
  99         return salGroupService;
 100     }
 101
 102     public DataBroker getDataService() {
 103         return dataService;
 104     }
 105 }