netconf/netconf-monitoring/src/main/java/org/opendaylight/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.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.netconf.api.monitoring.NetconfMonitoringService;
  14 import org.opendaylight.netconf.api.util.NetconfConstants;
  15 import org.opendaylight.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,
  24         NetconfMonitoringService> {
  25
  26     private static final Logger LOG = LoggerFactory.getLogger(NetconfMonitoringServiceTracker.class);
  27
  28     private ServiceRegistration<NetconfOperationServiceFactory> reg;
  29     private NetconfMonitoringActivator.NetconfMonitoringOperationServiceFactory factory;
  30
  31     NetconfMonitoringServiceTracker(final BundleContext context) {
  32         super(context, NetconfMonitoringService.class, null);
  33     }
  34
  35     @Override
  36     public NetconfMonitoringService addingService(final ServiceReference<NetconfMonitoringService> reference) {
  37         Preconditions.checkState(reg == null, "Monitoring service was already added");
  38
  39         final NetconfMonitoringService netconfMonitoringService = super.addingService(reference);
  40
  41         final NetconfMonitoringOperationService operationService = new NetconfMonitoringOperationService(
  42                 netconfMonitoringService);
  43         factory = new NetconfMonitoringActivator.NetconfMonitoringOperationServiceFactory(
  44                 operationService);
  45
  46         Dictionary<String, String> properties = new Hashtable<>();
  47         properties.put(NetconfConstants.SERVICE_NAME, NetconfConstants.NETCONF_MONITORING);
  48         reg = context.registerService(NetconfOperationServiceFactory.class, factory, properties);
  49
  50         return netconfMonitoringService;
  51     }
  52
  53     @SuppressWarnings("checkstyle:IllegalCatch")
  54     @Override
  55     public void removedService(final ServiceReference<NetconfMonitoringService> reference,
  56                                final NetconfMonitoringService netconfMonitoringService) {
  57         if (reg != null) {
  58             try {
  59                 reg.unregister();
  60             } catch (final Exception e) {
  61                 LOG.warn("Ignoring exception while unregistering {}", reg, e);
  62             }
  63         }
  64         if (factory != null) {
  65             factory.close();
  66         }
  67     }
  68
  69 }