binding/mdsal-binding-dom-codec-osgi/src/main/java/org/opendaylight/mdsal/binding/dom/codec/osgi/impl/OsgiModuleInfoRegistry.java

   1 /*
   2  * Copyright (c) 2017 Pantheon Technologies, s.r.o. 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.mdsal.binding.dom.codec.osgi.impl;
   9
  10 import static com.google.common.base.Preconditions.checkNotNull;
  11
  12 import javax.annotation.concurrent.GuardedBy;
  13 import org.opendaylight.mdsal.binding.generator.api.ModuleInfoRegistry;
  14 import org.opendaylight.yangtools.concepts.ObjectRegistration;
  15 import org.opendaylight.yangtools.yang.binding.YangModuleInfo;
  16 import org.opendaylight.yangtools.yang.model.api.SchemaContext;
  17 import org.opendaylight.yangtools.yang.model.api.SchemaContextProvider;
  18 import org.osgi.framework.ServiceRegistration;
  19 import org.slf4j.Logger;
  20 import org.slf4j.LoggerFactory;
  21
  22 /**
  23  * Update SchemaContext service in Service Registry each time new YangModuleInfo is added or removed.
  24  */
  25 final class OsgiModuleInfoRegistry implements ModuleInfoRegistry {
  26     private static final Logger LOG = LoggerFactory.getLogger(OsgiModuleInfoRegistry.class);
  27
  28     private final SimpleBindingRuntimeContextService runtimeContext;
  29     private final SchemaContextProvider schemaContextProvider;
  30     private final ModuleInfoRegistry moduleInfoRegistry;
  31
  32     @GuardedBy("this")
  33     private ServiceRegistration<?> registration;
  34     @GuardedBy("this")
  35     private long generation;
  36
  37     OsgiModuleInfoRegistry(final ModuleInfoRegistry moduleInfoRegistry,
  38         final SchemaContextProvider schemaContextProvider, final SimpleBindingRuntimeContextService runtimeContext) {
  39
  40         this.moduleInfoRegistry = checkNotNull(moduleInfoRegistry);
  41         this.schemaContextProvider = checkNotNull(schemaContextProvider);
  42         this.runtimeContext = checkNotNull(runtimeContext);
  43     }
  44
  45     synchronized void updateService() {
  46         final SchemaContext context;
  47         try {
  48             context = schemaContextProvider.getSchemaContext();
  49         } catch (final RuntimeException e) {
  50             // The ModuleInfoBackedContext throws a RuntimeException if it can't create the schema context.
  51             LOG.error("Error updating the schema context", e);
  52             return;
  53         }
  54
  55         try {
  56             runtimeContext.updateBindingRuntimeContext(context);
  57         } catch (final RuntimeException e) {
  58             LOG.error("Error updating binding runtime context", e);
  59             return;
  60         }
  61     }
  62
  63     @Override
  64     public ObjectRegistration<YangModuleInfo> registerModuleInfo(final YangModuleInfo yangModuleInfo) {
  65         return new ObjectRegistrationWrapper(moduleInfoRegistry.registerModuleInfo(yangModuleInfo));
  66     }
  67
  68     private class ObjectRegistrationWrapper implements ObjectRegistration<YangModuleInfo> {
  69         private final ObjectRegistration<YangModuleInfo> inner;
  70
  71         ObjectRegistrationWrapper(final ObjectRegistration<YangModuleInfo> inner) {
  72             this.inner = checkNotNull(inner);
  73         }
  74
  75         @Override
  76         public YangModuleInfo getInstance() {
  77             return inner.getInstance();
  78         }
  79
  80         @Override
  81         public void close() throws Exception {
  82             try {
  83                 inner.close();
  84             } finally {
  85                 // send modify event when a bundle disappears
  86                 updateService();
  87             }
  88         }
  89
  90         @Override
  91         public String toString() {
  92             return inner.toString();
  93         }
  94     }
  95 }