opendaylight/md-sal/sal-schema-service/src/main/java/org/opendaylight/controller/sal/schema/service/impl/GlobalBundleScanningSchemaServiceImpl.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 package org.opendaylight.controller.sal.schema.service.impl;
   9
  10 import com.google.common.base.Preconditions;
  11 import com.google.common.util.concurrent.CheckedFuture;
  12 import com.google.common.util.concurrent.Futures;
  13 import java.util.HashSet;
  14 import java.util.Set;
  15 import javax.annotation.concurrent.GuardedBy;
  16 import org.opendaylight.controller.sal.core.api.model.SchemaService;
  17 import org.opendaylight.controller.sal.core.api.model.YangTextSourceProvider;
  18 import org.opendaylight.mdsal.dom.api.DOMSchemaService;
  19 import org.opendaylight.mdsal.dom.api.DOMYangTextSourceProvider;
  20 import org.opendaylight.yangtools.concepts.AbstractListenerRegistration;
  21 import org.opendaylight.yangtools.concepts.ListenerRegistration;
  22 import org.opendaylight.yangtools.yang.model.api.Module;
  23 import org.opendaylight.yangtools.yang.model.api.SchemaContext;
  24 import org.opendaylight.yangtools.yang.model.api.SchemaContextListener;
  25 import org.opendaylight.yangtools.yang.model.api.SchemaContextProvider;
  26 import org.opendaylight.yangtools.yang.model.repo.api.MissingSchemaSourceException;
  27 import org.opendaylight.yangtools.yang.model.repo.api.SchemaSourceException;
  28 import org.opendaylight.yangtools.yang.model.repo.api.SourceIdentifier;
  29 import org.opendaylight.yangtools.yang.model.repo.api.YangTextSchemaSource;
  30
  31 public final class GlobalBundleScanningSchemaServiceImpl implements SchemaContextProvider, SchemaService,
  32         YangTextSourceProvider, AutoCloseable {
  33
  34     @GuardedBy("lock")
  35     private final Set<ListenerRegistration<?>> listeners = new HashSet<>();
  36     private final Object lock = new Object();
  37     private final DOMSchemaService schemaService;
  38     private final DOMYangTextSourceProvider yangProvider;
  39
  40     private GlobalBundleScanningSchemaServiceImpl(final DOMSchemaService schemaService) {
  41         this.schemaService = Preconditions.checkNotNull(schemaService);
  42         this.yangProvider = (DOMYangTextSourceProvider) schemaService.getSupportedExtensions()
  43                 .get(DOMYangTextSourceProvider.class);
  44     }
  45
  46     public static GlobalBundleScanningSchemaServiceImpl createInstance(final DOMSchemaService schemaService) {
  47         return new GlobalBundleScanningSchemaServiceImpl(schemaService);
  48     }
  49
  50     @Override
  51     public SchemaContext getSchemaContext() {
  52         return schemaService.getGlobalContext();
  53     }
  54
  55     @Override
  56     public SchemaContext getGlobalContext() {
  57         return schemaService.getGlobalContext();
  58     }
  59
  60     @Override
  61     public void addModule(final Module module) {
  62         throw new UnsupportedOperationException();
  63     }
  64
  65     @Override
  66     public SchemaContext getSessionContext() {
  67         throw new UnsupportedOperationException();
  68     }
  69
  70     @Override
  71     public void removeModule(final Module module) {
  72         throw new UnsupportedOperationException();
  73     }
  74
  75     @Override
  76     public ListenerRegistration<SchemaContextListener> registerSchemaContextListener(
  77             final SchemaContextListener listener) {
  78         synchronized (lock) {
  79             final ListenerRegistration<SchemaContextListener> reg = schemaService.registerSchemaContextListener(
  80                 listener);
  81
  82             final ListenerRegistration<SchemaContextListener> ret =
  83                     new AbstractListenerRegistration<SchemaContextListener>(listener) {
  84                 @Override
  85                 protected void removeRegistration() {
  86                     synchronized (lock) {
  87                         listeners.remove(this);
  88                     }
  89                     reg.close();
  90                 }
  91             };
  92
  93             listeners.add(ret);
  94             return ret;
  95         }
  96     }
  97
  98     @Override
  99     public void close() {
 100         synchronized (lock) {
 101             for (ListenerRegistration<?> l : listeners) {
 102                 l.close();
 103             }
 104             listeners.clear();
 105         }
 106     }
 107
 108     @SuppressWarnings("unchecked")
 109     @Override
 110     public CheckedFuture<YangTextSchemaSource, SchemaSourceException> getSource(
 111             final SourceIdentifier sourceIdentifier) {
 112         if (yangProvider == null) {
 113             return Futures.immediateFailedCheckedFuture(new MissingSchemaSourceException(
 114                 "Source provider is not available", sourceIdentifier));
 115         }
 116
 117         return (CheckedFuture<YangTextSchemaSource, SchemaSourceException>) yangProvider.getSource(sourceIdentifier);
 118     }
 119 }