opendaylight/md-sal/sal-remoterpc-connector/implementation/src/main/java/org/opendaylight/controller/sal/connector/remoterpc/RoutingTableProvider.java

   1 /*
   2  * Copyright (c) 2013 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.sal.connector.remoterpc;
  10
  11 import com.google.common.base.Optional;
  12 import org.opendaylight.controller.sal.connector.remoterpc.api.RouteChangeListener;
  13 import org.opendaylight.controller.sal.connector.remoterpc.api.RoutingTable;
  14 import org.opendaylight.controller.sal.connector.remoterpc.impl.RoutingTableImpl;
  15 import org.osgi.framework.BundleContext;
  16 import org.osgi.util.tracker.ServiceTracker;
  17
  18 public class RoutingTableProvider implements AutoCloseable {
  19
  20     @SuppressWarnings("rawtypes")
  21     final ServiceTracker<RoutingTable,RoutingTable> tracker;
  22
  23     private RoutingTableImpl routingTableImpl = null;
  24
  25     final private RouteChangeListener routeChangeListener;
  26
  27
  28     public RoutingTableProvider(BundleContext ctx,RouteChangeListener rcl) {
  29         @SuppressWarnings("rawtypes")
  30         ServiceTracker<RoutingTable, RoutingTable> rawTracker = new ServiceTracker<>(ctx, RoutingTable.class, null);
  31         tracker = rawTracker;
  32         tracker.open();
  33
  34         routeChangeListener = rcl;
  35     }
  36
  37     public Optional<RoutingTable<String, String>> getRoutingTable() {
  38         @SuppressWarnings("unchecked")
  39         RoutingTable<String,String> tracked = tracker.getService();
  40
  41         if(tracked instanceof RoutingTableImpl){
  42             if(routingTableImpl != tracked){
  43              routingTableImpl= (RoutingTableImpl)tracked;
  44              routingTableImpl.setRouteChangeListener(routeChangeListener);
  45             }
  46         }
  47
  48         return Optional.fromNullable(tracked);
  49     }
  50
  51     @Override
  52     public void close() throws Exception {
  53         tracker.close();
  54     }
  55 }