opendaylight/config/config-persister-feature-adapter/src/main/java/org/opendaylight/controller/configpusherfeature/internal/FeatureServiceCustomizer.java

   1 /*
   2  * Copyright (c) 2014 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.configpusherfeature.internal;
   9
  10 import com.google.common.base.Optional;
  11 import com.google.common.collect.Sets;
  12 import java.util.Set;
  13 import org.apache.karaf.features.Feature;
  14 import org.apache.karaf.features.FeaturesListener;
  15 import org.apache.karaf.features.FeaturesService;
  16 import org.opendaylight.controller.config.persist.api.ConfigPusher;
  17 import org.opendaylight.controller.config.persist.storage.file.xml.FeatureListProvider;
  18 import org.opendaylight.controller.config.persist.storage.file.xml.XmlFileStorageAdapter;
  19 import org.osgi.framework.BundleContext;
  20 import org.osgi.framework.ServiceReference;
  21 import org.osgi.framework.ServiceRegistration;
  22 import org.osgi.util.tracker.ServiceTrackerCustomizer;
  23
  24 public class FeatureServiceCustomizer implements ServiceTrackerCustomizer<FeaturesService, FeaturesService>, AutoCloseable {
  25     private ConfigPusher configPusher = null;
  26     private ConfigFeaturesListener configFeaturesListener = null;
  27     private ServiceRegistration<?> registration;
  28
  29     FeatureServiceCustomizer(ConfigPusher c) {
  30         configPusher = c;
  31     }
  32
  33
  34     @Override
  35     public FeaturesService addingService(ServiceReference<FeaturesService> reference) {
  36         BundleContext bc = reference.getBundle().getBundleContext();
  37         final FeaturesService featureService = bc.getService(reference);
  38         final Optional<XmlFileStorageAdapter> currentPersister = XmlFileStorageAdapter.getInstance();
  39
  40         if(XmlFileStorageAdapter.getInstance().isPresent()) {
  41             final Set<String> installedFeatureIds = Sets.newHashSet();
  42             for (final Feature installedFeature : featureService.listInstalledFeatures()) {
  43                 installedFeatureIds.add(installedFeature.getId());
  44             }
  45
  46             currentPersister.get().setFeaturesService(new FeatureListProvider() {
  47                 @Override
  48                 public Set<String> listFeatures() {
  49                     return installedFeatureIds;
  50                 }
  51             });
  52         }
  53         configFeaturesListener = new ConfigFeaturesListener(configPusher,featureService);
  54         registration = bc.registerService(FeaturesListener.class.getCanonicalName(), configFeaturesListener, null);
  55         return featureService;
  56     }
  57
  58     @Override
  59     public void modifiedService(ServiceReference<FeaturesService> reference,
  60             FeaturesService service) {
  61         // we don't care if the properties change
  62
  63     }
  64
  65     @Override
  66     public void removedService(ServiceReference<FeaturesService> reference,
  67             FeaturesService service) {
  68         close();
  69     }
  70
  71     @Override
  72     public void close() {
  73         if(registration != null) {
  74             registration.unregister();
  75             registration = null;
  76         }
  77     }
  78
  79 }