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 java.util.Objects.requireNonNull;
  11
  12 import org.checkerframework.checker.lock.qual.GuardedBy;
  13 import org.opendaylight.binding.runtime.spi.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 = requireNonNull(moduleInfoRegistry);
  41         this.schemaContextProvider = requireNonNull(schemaContextProvider);
  42         this.runtimeContext = requireNonNull(runtimeContext);
  43     }
  44
  45     @Override
  46     public ObjectRegistration<YangModuleInfo> registerModuleInfo(final YangModuleInfo yangModuleInfo) {
  47         return new ObjectRegistrationWrapper(registerInfo(yangModuleInfo));
  48     }
  49
  50     @SuppressWarnings("checkstyle:illegalCatch")
  51     synchronized void updateService() {
  52         final SchemaContext context;
  53         try {
  54             context = schemaContextProvider.getSchemaContext();
  55         } catch (final RuntimeException e) {
  56             // The ModuleInfoBackedContext throws a RuntimeException if it can't create the schema context.
  57             LOG.error("Error updating the schema context", e);
  58             return;
  59         }
  60
  61         try {
  62             runtimeContext.updateBindingRuntimeContext(context);
  63         } catch (final RuntimeException e) {
  64             LOG.error("Error updating binding runtime context", e);
  65             return;
  66         }
  67     }
  68
  69     ObjectRegistration<YangModuleInfo> registerInfo(final YangModuleInfo yangModuleInfo) {
  70         return moduleInfoRegistry.registerModuleInfo(yangModuleInfo);
  71     }
  72
  73     private class ObjectRegistrationWrapper implements ObjectRegistration<YangModuleInfo> {
  74         private final ObjectRegistration<YangModuleInfo> inner;
  75
  76         ObjectRegistrationWrapper(final ObjectRegistration<YangModuleInfo> inner) {
  77             this.inner = requireNonNull(inner);
  78         }
  79
  80         @Override
  81         public YangModuleInfo getInstance() {
  82             return inner.getInstance();
  83         }
  84
  85         @Override
  86         @SuppressWarnings("checkstyle:illegalCatch")
  87         public void close() {
  88             try {
  89                 inner.close();
  90             } finally {
  91                 // send modify event when a bundle disappears
  92                 updateService();
  93             }
  94         }
  95
  96         @Override
  97         public String toString() {
  98             return inner.toString();
  99         }
 100     }
 101 }