opendaylight/netconf/netconf-monitoring/src/main/java/org/opendaylight/controller/netconf/monitoring/osgi/NetconfMonitoringServiceTracker.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 package org.opendaylight.controller.netconf.monitoring.osgi;
   9
  10 import com.google.common.base.Preconditions;
  11 import java.util.Dictionary;
  12 import java.util.Hashtable;
  13 import org.opendaylight.controller.netconf.api.monitoring.NetconfMonitoringService;
  14 import org.opendaylight.controller.netconf.api.util.NetconfConstants;
  15 import org.opendaylight.controller.netconf.mapping.api.NetconfOperationServiceFactory;
  16 import org.osgi.framework.BundleContext;
  17 import org.osgi.framework.ServiceReference;
  18 import org.osgi.framework.ServiceRegistration;
  19 import org.osgi.util.tracker.ServiceTracker;
  20 import org.slf4j.Logger;
  21 import org.slf4j.LoggerFactory;
  22
  23 public class NetconfMonitoringServiceTracker extends ServiceTracker<NetconfMonitoringService, NetconfMonitoringService> {
  24
  25     private static final Logger LOG = LoggerFactory.getLogger(NetconfMonitoringServiceTracker.class);
  26
  27     private ServiceRegistration<NetconfOperationServiceFactory> reg;
  28     private NetconfMonitoringActivator.NetconfMonitoringOperationServiceFactory factory;
  29
  30     NetconfMonitoringServiceTracker(final BundleContext context) {
  31         super(context, NetconfMonitoringService.class, null);
  32     }
  33
  34     @Override
  35     public NetconfMonitoringService addingService(final ServiceReference<NetconfMonitoringService> reference) {
  36         Preconditions.checkState(reg == null, "Monitoring service was already added");
  37
  38         final NetconfMonitoringService netconfMonitoringService = super.addingService(reference);
  39
  40         final NetconfMonitoringOperationService operationService = new NetconfMonitoringOperationService(
  41                 netconfMonitoringService);
  42         factory = new NetconfMonitoringActivator.NetconfMonitoringOperationServiceFactory(
  43                 operationService);
  44
  45         Dictionary<String, String> properties = new Hashtable<>();
  46         properties.put(NetconfConstants.SERVICE_NAME, NetconfConstants.NETCONF_MONITORING);
  47         reg = context.registerService(NetconfOperationServiceFactory.class, factory, properties);
  48
  49         return netconfMonitoringService;
  50     }
  51
  52     @Override
  53     public void removedService(final ServiceReference<NetconfMonitoringService> reference,
  54             final NetconfMonitoringService netconfMonitoringService) {
  55         if(reg!=null) {
  56             try {
  57                 reg.unregister();
  58             } catch (final Exception e) {
  59                 LOG.warn("Ignoring exception while unregistering {}", reg, e);
  60             }
  61         }
  62         if(factory!=null) {
  63             factory.close();
  64         }
  65     }
  66
  67 }