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