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