opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/DatastoreContextConfigAdminOverlay.java

   1 /*
   2  * Copyright (c) 2015 Brocade Communications 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.cluster.datastore;
   9
  10 import java.io.IOException;
  11 import java.util.Dictionary;
  12 import org.osgi.framework.BundleContext;
  13 import org.osgi.framework.ServiceReference;
  14 import org.osgi.service.cm.Configuration;
  15 import org.osgi.service.cm.ConfigurationAdmin;
  16 import org.slf4j.Logger;
  17 import org.slf4j.LoggerFactory;
  18
  19 /**
  20  * Class that overlays DatastoreContext settings with settings obtained from an OSGi Config Admin
  21  * service.
  22  *
  23  * @author Thomas Pantelis
  24  */
  25 public class DatastoreContextConfigAdminOverlay implements AutoCloseable {
  26     public static final String CONFIG_ID = "org.opendaylight.controller.cluster.datastore";
  27
  28     private static final Logger LOG = LoggerFactory.getLogger(DatastoreContextConfigAdminOverlay.class);
  29
  30     private final DatastoreContextIntrospector introspector;
  31     private final BundleContext bundleContext;
  32
  33     public DatastoreContextConfigAdminOverlay(DatastoreContextIntrospector introspector, BundleContext bundleContext) {
  34         this.introspector = introspector;
  35         this.bundleContext = bundleContext;
  36
  37         ServiceReference<ConfigurationAdmin> configAdminServiceReference =
  38                 bundleContext.getServiceReference(ConfigurationAdmin.class);
  39         if(configAdminServiceReference == null) {
  40             LOG.warn("No ConfigurationAdmin service found");
  41         } else {
  42             overlaySettings(configAdminServiceReference);
  43         }
  44     }
  45
  46     private void overlaySettings(ServiceReference<ConfigurationAdmin> configAdminServiceReference) {
  47         try {
  48             ConfigurationAdmin configAdmin = bundleContext.getService(configAdminServiceReference);
  49
  50             Configuration config = configAdmin.getConfiguration(CONFIG_ID);
  51             if(config != null) {
  52                 Dictionary<String, Object> properties = config.getProperties();
  53
  54                 LOG.debug("Overlaying settings: {}", properties);
  55
  56                 introspector.update(properties);
  57             } else {
  58                 LOG.debug("No Configuration found for {}", CONFIG_ID);
  59             }
  60         } catch (IOException e) {
  61             LOG.error("Error obtaining Configuration for pid {}", CONFIG_ID, e);
  62         } catch(IllegalStateException e) {
  63             // Ignore - indicates the bundleContext has been closed.
  64         } finally {
  65             try {
  66                 bundleContext.ungetService(configAdminServiceReference);
  67             } catch (Exception e) {
  68                 LOG.debug("Error from ungetService", e);
  69             }
  70         }
  71     }
  72
  73     @Override
  74     public void close() {
  75     }
  76 }