opendaylight/config/config-manager/src/main/java/org/opendaylight/controller/config/manager/impl/osgi/mapping/RefreshingSCPModuleInfoRegistry.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
   9 package org.opendaylight.controller.config.manager.impl.osgi.mapping;
  10
  11 import java.util.Hashtable;
  12 import org.opendaylight.yangtools.concepts.ObjectRegistration;
  13 import org.opendaylight.yangtools.sal.binding.generator.api.ClassLoadingStrategy;
  14 import org.opendaylight.yangtools.sal.binding.generator.api.ModuleInfoRegistry;
  15 import org.opendaylight.yangtools.yang.binding.YangModuleInfo;
  16 import org.opendaylight.yangtools.yang.model.api.SchemaContextProvider;
  17 import org.osgi.framework.BundleContext;
  18 import org.osgi.framework.ServiceRegistration;
  19
  20 /**
  21  * Update SchemaContext service in Service Registry each time new YangModuleInfo is added or removed.
  22  */
  23 public class RefreshingSCPModuleInfoRegistry implements ModuleInfoRegistry, AutoCloseable {
  24
  25     private final ModuleInfoRegistry moduleInfoRegistry;
  26     private final SchemaContextProvider schemaContextProvider;
  27     private final BindingContextProvider bindingContextProvider;
  28     private final ClassLoadingStrategy classLoadingStrat;
  29
  30     private final ServiceRegistration<SchemaContextProvider> osgiReg;
  31
  32     public RefreshingSCPModuleInfoRegistry(final ModuleInfoRegistry moduleInfoRegistry,
  33                                            final SchemaContextProvider schemaContextProvider, final ClassLoadingStrategy classLoadingStrat, final BindingContextProvider bindingContextProvider, final BundleContext bundleContext) {
  34         this.moduleInfoRegistry = moduleInfoRegistry;
  35         this.schemaContextProvider = schemaContextProvider;
  36         this.classLoadingStrat = classLoadingStrat;
  37         this.bindingContextProvider = bindingContextProvider;
  38         osgiReg = bundleContext.registerService(SchemaContextProvider.class, schemaContextProvider, new Hashtable<String, String>());
  39     }
  40
  41     private void updateService() {
  42         bindingContextProvider.update(classLoadingStrat, schemaContextProvider);
  43         osgiReg.setProperties(null); // send modifiedService event
  44     }
  45
  46     @Override
  47     public ObjectRegistration<YangModuleInfo> registerModuleInfo(YangModuleInfo yangModuleInfo) {
  48         ObjectRegistration<YangModuleInfo> yangModuleInfoObjectRegistration = moduleInfoRegistry.registerModuleInfo(yangModuleInfo);
  49         ObjectRegistrationWrapper wrapper = new ObjectRegistrationWrapper(yangModuleInfoObjectRegistration);
  50         updateService();
  51         return wrapper;
  52     }
  53
  54     @Override
  55     public void close() throws Exception {
  56         osgiReg.unregister();
  57     }
  58
  59
  60     private class ObjectRegistrationWrapper implements ObjectRegistration<YangModuleInfo> {
  61         private final ObjectRegistration<YangModuleInfo> inner;
  62
  63         private ObjectRegistrationWrapper(ObjectRegistration<YangModuleInfo> inner) {
  64             this.inner = inner;
  65         }
  66
  67         @Override
  68         public YangModuleInfo getInstance() {
  69             return inner.getInstance();
  70         }
  71
  72         @Override
  73         public void close() throws Exception {
  74             inner.close();
  75             updateService();// send modify event when a bundle disappears
  76         }
  77
  78
  79         @Override
  80         public String toString() {
  81             return inner.toString();
  82         }
  83     }
  84 }