opendaylight/config/config-persister-feature4-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
  13 import java.util.Set;
  14
  15 import org.apache.karaf.features.Feature;
  16 import org.apache.karaf.features.FeaturesListener;
  17 import org.apache.karaf.features.FeaturesService;
  18 import org.opendaylight.controller.config.persist.api.ConfigPusher;
  19 import org.opendaylight.controller.config.persist.storage.file.xml.FeatureListProvider;
  20 import org.opendaylight.controller.config.persist.storage.file.xml.XmlFileStorageAdapter;
  21 import org.osgi.framework.BundleContext;
  22 import org.osgi.framework.ServiceReference;
  23 import org.osgi.framework.ServiceRegistration;
  24 import org.osgi.util.tracker.ServiceTrackerCustomizer;
  25 import org.slf4j.Logger;
  26 import org.slf4j.LoggerFactory;
  27
  28 public class FeatureServiceCustomizer implements ServiceTrackerCustomizer<FeaturesService, FeaturesService>, AutoCloseable {
  29     private static final Logger LOG = LoggerFactory.getLogger(FeatureServiceCustomizer.class);
  30     private ConfigPusher configPusher = null;
  31     private ServiceRegistration<?> registration;
  32
  33     FeatureServiceCustomizer(ConfigPusher c) {
  34         configPusher = c;
  35     }
  36
  37     @Override
  38     public FeaturesService addingService(ServiceReference<FeaturesService> reference) {
  39         BundleContext bc = reference.getBundle().getBundleContext();
  40         final FeaturesService featureService = bc.getService(reference);
  41         final Optional<XmlFileStorageAdapter> currentPersister = XmlFileStorageAdapter.getInstance();
  42
  43         if (XmlFileStorageAdapter.getInstance().isPresent()) {
  44             final Set<String> installedFeatureIds = Sets.newHashSet();
  45             try {
  46                 for (final Feature installedFeature : featureService.listInstalledFeatures()) {
  47                     installedFeatureIds.add(installedFeature.getId());
  48                 }
  49             } catch (Exception e) {
  50                 LOG.error("Error listing installed features", e);
  51             }
  52
  53             currentPersister.get().setFeaturesService(new FeatureListProvider() {
  54                 @Override
  55                 public Set<String> listFeatures() {
  56                     return installedFeatureIds;
  57                 }
  58             });
  59         }
  60         ConfigFeaturesListener configFeaturesListener = new ConfigFeaturesListener(configPusher, featureService);
  61         registration = bc.registerService(FeaturesListener.class.getCanonicalName(), configFeaturesListener, null);
  62         return featureService;
  63     }
  64
  65     @Override
  66     public void modifiedService(ServiceReference<FeaturesService> reference,
  67                                 FeaturesService service) {
  68         // we don't care if the properties change
  69     }
  70
  71     @Override
  72     public void removedService(ServiceReference<FeaturesService> reference,
  73                                FeaturesService service) {
  74         close();
  75     }
  76
  77     @Override
  78     public void close() {
  79         if (registration != null) {
  80             registration.unregister();
  81             registration = null;
  82         }
  83     }
  84 }