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 package org.opendaylight.netconf.mdsal.connector;
   9
  10 import static com.google.common.base.Preconditions.checkState;
  11
  12 import java.util.Collections;
  13 import java.util.HashSet;
  14 import java.util.Set;
  15 import java.util.concurrent.atomic.AtomicReference;
  16 import org.eclipse.jdt.annotation.NonNull;
  17 import org.opendaylight.mdsal.dom.api.DOMSchemaService;
  18 import org.opendaylight.netconf.api.capability.Capability;
  19 import org.opendaylight.netconf.api.monitoring.CapabilityListener;
  20 import org.opendaylight.yangtools.concepts.ListenerRegistration;
  21 import org.opendaylight.yangtools.yang.model.api.EffectiveModelContext;
  22 import org.opendaylight.yangtools.yang.model.api.EffectiveModelContextListener;
  23 import org.opendaylight.yangtools.yang.model.repo.api.YangTextSchemaSource;
  24 import org.opendaylight.yangtools.yang.model.repo.spi.SchemaSourceProvider;
  25
  26 // Non-final for mocking
  27 @SuppressWarnings("checkstyle:FinalClass")
  28 public class CurrentSchemaContext implements EffectiveModelContextListener, AutoCloseable {
  29     private final AtomicReference<EffectiveModelContext> currentContext = new AtomicReference<>();
  30     private ListenerRegistration<?> schemaContextListenerListenerRegistration;
  31     private final Set<CapabilityListener> listeners1 = Collections.synchronizedSet(new HashSet<>());
  32     private final SchemaSourceProvider<YangTextSchemaSource> rootSchemaSourceProvider;
  33
  34     private CurrentSchemaContext(final SchemaSourceProvider<YangTextSchemaSource> rootSchemaSourceProvider) {
  35         this.rootSchemaSourceProvider = rootSchemaSourceProvider;
  36     }
  37
  38     // keep spotbugs from complaining about overridable method in constructor
  39     public static CurrentSchemaContext create(final DOMSchemaService schemaService,
  40                          final SchemaSourceProvider<YangTextSchemaSource> rootSchemaSourceProvider) {
  41         var context = new CurrentSchemaContext(rootSchemaSourceProvider);
  42         final ListenerRegistration<EffectiveModelContextListener> registration =
  43                 schemaService.registerSchemaContextListener(context);
  44         context.setRegistration(registration);
  45         return context;
  46     }
  47
  48     private void setRegistration(ListenerRegistration<EffectiveModelContextListener> registration) {
  49         schemaContextListenerListenerRegistration = registration;
  50     }
  51
  52     public @NonNull EffectiveModelContext getCurrentContext() {
  53         final var ret = currentContext.get();
  54         checkState(ret != null, "Current context not received");
  55         return ret;
  56     }
  57
  58     @Override
  59     public void onModelContextUpdated(final EffectiveModelContext schemaContext) {
  60         currentContext.set(schemaContext);
  61         // FIXME is notifying all the listeners from this callback wise ?
  62         final Set<Capability> addedCaps = MdsalNetconfOperationServiceFactory.transformCapabilities(
  63                 currentContext.get(), rootSchemaSourceProvider);
  64         for (final CapabilityListener listener : listeners1) {
  65             listener.onCapabilitiesChanged(addedCaps, Collections.emptySet());
  66         }
  67     }
  68
  69     @Override
  70     public void close() {
  71         listeners1.clear();
  72         schemaContextListenerListenerRegistration.close();
  73         currentContext.set(null);
  74     }
  75
  76     public AutoCloseable registerCapabilityListener(final CapabilityListener listener) {
  77         listener.onCapabilitiesChanged(MdsalNetconfOperationServiceFactory.transformCapabilities(currentContext.get(),
  78                 rootSchemaSourceProvider), Collections.emptySet());
  79         listeners1.add(listener);
  80         return () -> listeners1.remove(listener);
  81     }
  82 }