netconf/mdsal-netconf-connector/src/main/java/org/opendaylight/netconf/mdsal/connector/CurrentSchemaContext.java

   1 /*
   2  * Copyright (c) 2015 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.netconf.mdsal.connector;
  10
  11 import com.google.common.base.Preconditions;
  12 import com.google.common.collect.Sets;
  13 import java.util.Collections;
  14 import java.util.Set;
  15 import java.util.concurrent.atomic.AtomicReference;
  16 import org.opendaylight.mdsal.dom.api.DOMSchemaService;
  17 import org.opendaylight.netconf.api.capability.Capability;
  18 import org.opendaylight.netconf.api.monitoring.CapabilityListener;
  19 import org.opendaylight.yangtools.concepts.ListenerRegistration;
  20 import org.opendaylight.yangtools.yang.model.api.SchemaContext;
  21 import org.opendaylight.yangtools.yang.model.api.SchemaContextListener;
  22 import org.opendaylight.yangtools.yang.model.repo.api.YangTextSchemaSource;
  23 import org.opendaylight.yangtools.yang.model.repo.spi.SchemaSourceProvider;
  24
  25 public class CurrentSchemaContext implements SchemaContextListener, AutoCloseable {
  26     private final AtomicReference<SchemaContext> currentContext = new AtomicReference<>();
  27     private final ListenerRegistration<SchemaContextListener> schemaContextListenerListenerRegistration;
  28     private final Set<CapabilityListener> listeners1 = Collections.synchronizedSet(Sets.newHashSet());
  29     private final SchemaSourceProvider<YangTextSchemaSource> rootSchemaSourceProvider;
  30
  31     public SchemaContext getCurrentContext() {
  32         Preconditions.checkState(currentContext.get() != null, "Current context not received");
  33         return currentContext.get();
  34     }
  35
  36     public CurrentSchemaContext(final DOMSchemaService schemaService,
  37                                 final SchemaSourceProvider<YangTextSchemaSource> rootSchemaSourceProvider) {
  38         this.rootSchemaSourceProvider = rootSchemaSourceProvider;
  39         schemaContextListenerListenerRegistration = schemaService.registerSchemaContextListener(this);
  40     }
  41
  42     @Override
  43     public void onGlobalContextUpdated(final SchemaContext schemaContext) {
  44         currentContext.set(schemaContext);
  45         // FIXME is notifying all the listeners from this callback wise ?
  46         final Set<Capability> addedCaps = MdsalNetconfOperationServiceFactory.transformCapabilities(
  47                 currentContext.get(), rootSchemaSourceProvider);
  48         for (final CapabilityListener listener : listeners1) {
  49             listener.onCapabilitiesChanged(addedCaps, Collections.emptySet());
  50         }
  51     }
  52
  53     @Override
  54     public void close() throws Exception {
  55         listeners1.clear();
  56         schemaContextListenerListenerRegistration.close();
  57         currentContext.set(null);
  58     }
  59
  60     public AutoCloseable registerCapabilityListener(final CapabilityListener listener) {
  61         listener.onCapabilitiesChanged(MdsalNetconfOperationServiceFactory.transformCapabilities(currentContext.get(),
  62                 rootSchemaSourceProvider), Collections.emptySet());
  63         listeners1.add(listener);
  64         return () -> listeners1.remove(listener);
  65     }
  66 }