opendaylight/md-sal/sal-binding-broker/src/main/java/org/opendaylight/controller/config/yang/md/sal/binding/impl/RuntimeMappingModule.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.config.yang.md.sal.binding.impl;
   9
  10 import com.google.common.base.Preconditions;
  11 import java.util.Hashtable;
  12 import javassist.ClassPool;
  13 import org.opendaylight.controller.md.sal.binding.impl.BindingToNormalizedNodeCodec;
  14 import org.opendaylight.controller.sal.binding.codegen.impl.SingletonHolder;
  15 import org.opendaylight.yangtools.binding.data.codec.gen.impl.StreamWriterGenerator;
  16 import org.opendaylight.yangtools.binding.data.codec.impl.BindingNormalizedNodeCodecRegistry;
  17 import org.opendaylight.yangtools.sal.binding.generator.impl.GeneratedClassLoadingStrategy;
  18 import org.opendaylight.yangtools.sal.binding.generator.impl.RuntimeGeneratedMappingServiceImpl;
  19 import org.opendaylight.yangtools.yang.data.impl.codec.BindingIndependentMappingService;
  20 import org.opendaylight.yangtools.yang.model.api.SchemaContextListener;
  21 import org.osgi.framework.BundleContext;
  22 import org.osgi.framework.ServiceReference;
  23
  24 /**
  25 *
  26 */
  27 public final class RuntimeMappingModule extends AbstractRuntimeMappingModule {
  28
  29     private BundleContext bundleContext;
  30
  31     public RuntimeMappingModule(final org.opendaylight.controller.config.api.ModuleIdentifier identifier,
  32             final org.opendaylight.controller.config.api.DependencyResolver dependencyResolver) {
  33         super(identifier, dependencyResolver);
  34     }
  35
  36     public RuntimeMappingModule(final org.opendaylight.controller.config.api.ModuleIdentifier identifier,
  37             final org.opendaylight.controller.config.api.DependencyResolver dependencyResolver,
  38             final RuntimeMappingModule oldModule, final java.lang.AutoCloseable oldInstance) {
  39         super(identifier, dependencyResolver, oldModule, oldInstance);
  40     }
  41
  42     @Override
  43     public void validate() {
  44         super.validate();
  45         Preconditions.checkNotNull(bundleContext);
  46         // Add custom validation for module attributes here.
  47     }
  48
  49     @Override
  50     public boolean canReuseInstance(final AbstractRuntimeMappingModule oldModule) {
  51         return true;
  52     }
  53
  54     @Override
  55     public java.lang.AutoCloseable createInstance() {
  56         final GeneratedClassLoadingStrategy classLoading = getGlobalClassLoadingStrategy();
  57         final BindingIndependentMappingService legacyMapping = getGlobalLegacyMappingService(classLoading);
  58         BindingNormalizedNodeCodecRegistry codecRegistry = new BindingNormalizedNodeCodecRegistry(StreamWriterGenerator.create(SingletonHolder.JAVASSIST));
  59         BindingToNormalizedNodeCodec instance = new BindingToNormalizedNodeCodec(classLoading, legacyMapping, codecRegistry);
  60         bundleContext.registerService(SchemaContextListener.class, instance, new Hashtable<String,String>());
  61         return instance;
  62     }
  63
  64     private BindingIndependentMappingService getGlobalLegacyMappingService(final GeneratedClassLoadingStrategy classLoading) {
  65         BindingIndependentMappingService potential = tryToReuseGlobalMappingServiceInstance();
  66         if(potential == null) {
  67             potential =  new RuntimeGeneratedMappingServiceImpl(ClassPool.getDefault(),classLoading);
  68             bundleContext.registerService(SchemaContextListener.class, (SchemaContextListener) potential, new Hashtable<String,String>());
  69         }
  70         return potential;
  71     }
  72
  73     private GeneratedClassLoadingStrategy getGlobalClassLoadingStrategy() {
  74         ServiceReference<GeneratedClassLoadingStrategy> ref = bundleContext.getServiceReference(GeneratedClassLoadingStrategy.class);
  75         return bundleContext.getService(ref);
  76     }
  77
  78     private BindingIndependentMappingService tryToReuseGlobalMappingServiceInstance() {
  79         ServiceReference<BindingIndependentMappingService> serviceRef = getBundleContext().getServiceReference(BindingIndependentMappingService.class);
  80         if(serviceRef == null) {
  81             return null;
  82         }
  83         return bundleContext.getService(serviceRef);
  84
  85     }
  86
  87     private BundleContext getBundleContext() {
  88         return bundleContext;
  89     }
  90
  91     public void setBundleContext(final BundleContext bundleContext) {
  92         this.bundleContext = bundleContext;
  93     }
  94 }