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.Dictionary;
  12 import java.util.Hashtable;
  13 import org.opendaylight.mdsal.binding.generator.api.ClassLoadingStrategy;
  14 import org.opendaylight.mdsal.binding.generator.api.ModuleInfoRegistry;
  15 import org.opendaylight.mdsal.binding.generator.util.BindingRuntimeContext;
  16 import org.opendaylight.yangtools.concepts.ObjectRegistration;
  17 import org.opendaylight.yangtools.yang.binding.YangModuleInfo;
  18 import org.opendaylight.yangtools.yang.model.api.SchemaContextProvider;
  19 import org.opendaylight.yangtools.yang.model.repo.api.YangTextSchemaSource;
  20 import org.opendaylight.yangtools.yang.model.repo.spi.SchemaSourceProvider;
  21 import org.osgi.framework.BundleContext;
  22 import org.osgi.framework.ServiceRegistration;
  23 import org.slf4j.Logger;
  24 import org.slf4j.LoggerFactory;
  25
  26 /**
  27  * Update SchemaContext service in Service Registry each time new YangModuleInfo is added or removed.
  28  */
  29 public class RefreshingSCPModuleInfoRegistry implements ModuleInfoRegistry, AutoCloseable {
  30     private static final Logger LOG = LoggerFactory.getLogger(RefreshingSCPModuleInfoRegistry.class);
  31
  32     private final ModuleInfoRegistry moduleInfoRegistry;
  33     private final SchemaContextProvider schemaContextProvider;
  34     private final SchemaSourceProvider<YangTextSchemaSource> sourceProvider;
  35     private final BindingContextProvider bindingContextProvider;
  36     private final ClassLoadingStrategy classLoadingStrat;
  37
  38     private volatile ServiceRegistration<SchemaContextProvider> osgiReg;
  39
  40     public RefreshingSCPModuleInfoRegistry(final ModuleInfoRegistry moduleInfoRegistry,
  41         final SchemaContextProvider schemaContextProvider, final ClassLoadingStrategy classLoadingStrat,
  42         final SchemaSourceProvider<YangTextSchemaSource> sourceProvider, final BindingContextProvider bindingContextProvider,
  43         final BundleContext bundleContext) {
  44
  45         this.moduleInfoRegistry = moduleInfoRegistry;
  46         this.schemaContextProvider = schemaContextProvider;
  47         this.classLoadingStrat = classLoadingStrat;
  48         this.sourceProvider = sourceProvider;
  49         this.bindingContextProvider = bindingContextProvider;
  50         this.osgiReg = bundleContext
  51             .registerService(SchemaContextProvider.class, schemaContextProvider, new Hashtable<String, String>());
  52     }
  53
  54     public synchronized void updateService() {
  55         if (this.osgiReg != null) {
  56             try {
  57                 this.bindingContextProvider.update(this.classLoadingStrat, this.schemaContextProvider);
  58
  59                 final Dictionary<String, Object> props = new Hashtable<>();
  60                 props.put(BindingRuntimeContext.class.getName(), this.bindingContextProvider.getBindingContext());
  61                 props.put(SchemaSourceProvider.class.getName(), this.sourceProvider);
  62                 // send modifiedService event
  63                 this.osgiReg.setProperties(props);
  64             } catch (final RuntimeException e) {
  65                 // The ModuleInfoBackedContext throws a RuntimeException if it can't create the schema context.
  66                 LOG.warn("Error updating the BindingContextProvider", e);
  67             }
  68         }
  69     }
  70
  71     @Override
  72     public ObjectRegistration<YangModuleInfo> registerModuleInfo(final YangModuleInfo yangModuleInfo) {
  73         final ObjectRegistration<YangModuleInfo> yangModuleInfoObjectRegistration = this.moduleInfoRegistry.registerModuleInfo(yangModuleInfo);
  74         return new ObjectRegistrationWrapper(yangModuleInfoObjectRegistration);
  75     }
  76
  77     @Override
  78     public synchronized void close() throws Exception {
  79         if (this.osgiReg != null) {
  80             this.osgiReg.unregister();
  81         }
  82
  83         this.osgiReg = null;
  84     }
  85
  86     private class ObjectRegistrationWrapper implements ObjectRegistration<YangModuleInfo> {
  87         private final ObjectRegistration<YangModuleInfo> inner;
  88
  89         private ObjectRegistrationWrapper(final ObjectRegistration<YangModuleInfo> inner) {
  90             this.inner = inner;
  91         }
  92
  93         @Override
  94         public YangModuleInfo getInstance() {
  95             return this.inner.getInstance();
  96         }
  97
  98         @Override
  99         public void close() throws Exception {
 100             this.inner.close();
 101             // send modify event when a bundle disappears
 102             updateService();
 103         }
 104
 105         @Override
 106         public String toString() {
 107             return this.inner.toString();
 108         }
 109     }
 110 }