opendaylight/md-sal/sal-rest-connector/src/main/java/org/opendaylight/controller/sal/rest/impl/RestconfProvider.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.sal.rest.impl;
   9
  10 import java.util.Collection;
  11 import java.util.Collections;
  12
  13 import org.opendaylight.controller.sal.core.api.Broker;
  14 import org.opendaylight.controller.sal.core.api.Broker.ProviderSession;
  15 import org.opendaylight.controller.sal.core.api.Provider;
  16 import org.opendaylight.controller.sal.core.api.data.DataBrokerService;
  17 import org.opendaylight.controller.sal.core.api.model.SchemaService;
  18 import org.opendaylight.controller.sal.core.api.mount.MountService;
  19 import org.opendaylight.controller.sal.restconf.impl.BrokerFacade;
  20 import org.opendaylight.controller.sal.restconf.impl.ControllerContext;
  21 import org.opendaylight.yangtools.concepts.ListenerRegistration;
  22 import org.opendaylight.yangtools.yang.model.api.SchemaServiceListener;
  23 import org.osgi.framework.BundleActivator;
  24 import org.osgi.framework.BundleContext;
  25 import org.osgi.framework.ServiceReference;
  26 import org.osgi.util.tracker.ServiceTracker;
  27 import org.osgi.util.tracker.ServiceTrackerCustomizer;
  28
  29 public class RestconfProvider implements BundleActivator, Provider, ServiceTrackerCustomizer<Broker, Broker> {
  30
  31     public final static String NOT_INITALIZED_MSG = "Restconf is not initialized yet. Please try again later";
  32
  33     private ListenerRegistration<SchemaServiceListener> listenerRegistration;
  34     private ServiceTracker<Broker, Broker> brokerServiceTrancker;
  35     private BundleContext bundleContext;
  36     private ProviderSession session;
  37
  38     @Override
  39     public void onSessionInitiated(ProviderSession session) {
  40         DataBrokerService dataService = session.getService(DataBrokerService.class);
  41
  42         BrokerFacade.getInstance().setContext(session);
  43         BrokerFacade.getInstance().setDataService(dataService);
  44
  45         SchemaService schemaService = session.getService(SchemaService.class);
  46         listenerRegistration = schemaService.registerSchemaServiceListener(ControllerContext.getInstance());
  47         ControllerContext.getInstance().setSchemas(schemaService.getGlobalContext());
  48         ControllerContext.getInstance().setMountService(session.getService(MountService.class));
  49     }
  50
  51     @Override
  52     public void start(BundleContext context) throws Exception {
  53         bundleContext = context;
  54         brokerServiceTrancker = new ServiceTracker<>(context, Broker.class, this);
  55         brokerServiceTrancker.open();
  56     }
  57
  58     @Override
  59     public void stop(BundleContext context) {
  60         if (listenerRegistration != null) {
  61             try {
  62                 listenerRegistration.close();
  63             } catch (Exception e) {
  64                 e.printStackTrace();
  65             }
  66         }
  67         session.close();
  68         brokerServiceTrancker.close();
  69     }
  70
  71     @Override
  72     public Collection<ProviderFunctionality> getProviderFunctionality() {
  73         return Collections.emptySet();
  74     }
  75
  76     @Override
  77     public Broker addingService(ServiceReference<Broker> reference) {
  78         Broker broker = bundleContext.getService(reference);
  79         broker.registerProvider(this, bundleContext);
  80         return broker;
  81     }
  82
  83     @Override
  84     public void modifiedService(ServiceReference<Broker> reference, Broker service) {
  85         // NOOP
  86     }
  87
  88     @Override
  89     public void removedService(ServiceReference<Broker> reference, Broker service) {
  90         bundleContext.ungetService(reference);
  91         BrokerFacade.getInstance().setContext(null);
  92         BrokerFacade.getInstance().setDataService(null);
  93         ControllerContext.getInstance().setSchemas(null);
  94     }
  95 }