plugins/netconf-server-mdsal/src/main/java/org/opendaylight/netconf/server/mdsal/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.server.mdsal;
   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.server.api.monitoring.CapabilityListener;
  19 import org.opendaylight.yangtools.concepts.Registration;
  20 import org.opendaylight.yangtools.yang.model.api.EffectiveModelContext;
  21 import org.opendaylight.yangtools.yang.model.api.EffectiveModelContextListener;
  22 import org.opendaylight.yangtools.yang.model.repo.api.YangTextSchemaSource;
  23 import org.opendaylight.yangtools.yang.model.repo.spi.SchemaSourceProvider;
  24
  25 // Non-final for mocking
  26 @SuppressWarnings("checkstyle:FinalClass")
  27 public class CurrentSchemaContext implements EffectiveModelContextListener, AutoCloseable {
  28     private final AtomicReference<EffectiveModelContext> currentContext = new AtomicReference<>();
  29     private final Set<CapabilityListener> listeners = Collections.synchronizedSet(new HashSet<>());
  30     private final SchemaSourceProvider<YangTextSchemaSource> rootSchemaSourceProvider;
  31
  32     private Registration schemaContextListenerListenerRegistration;
  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 Registration registration = schemaService.registerSchemaContextListener(context);
  43         context.setRegistration(registration);
  44         return context;
  45     }
  46
  47     private void setRegistration(final Registration registration) {
  48         schemaContextListenerListenerRegistration = registration;
  49     }
  50
  51     public @NonNull EffectiveModelContext getCurrentContext() {
  52         final var ret = currentContext.get();
  53         checkState(ret != null, "Current context not received");
  54         return ret;
  55     }
  56
  57     @Override
  58     public void onModelContextUpdated(final EffectiveModelContext schemaContext) {
  59         currentContext.set(schemaContext);
  60         // FIXME is notifying all the listeners from this callback wise ?
  61         final var addedCaps = MdsalNetconfOperationServiceFactory.transformCapabilities(schemaContext,
  62             rootSchemaSourceProvider);
  63         for (var listener : listeners) {
  64             listener.onCapabilitiesChanged(addedCaps, Set.of());
  65         }
  66     }
  67
  68     @Override
  69     public void close() {
  70         listeners.clear();
  71         schemaContextListenerListenerRegistration.close();
  72         currentContext.set(null);
  73     }
  74
  75     public Registration registerCapabilityListener(final CapabilityListener listener) {
  76         listener.onCapabilitiesChanged(MdsalNetconfOperationServiceFactory.transformCapabilities(currentContext.get(),
  77                 rootSchemaSourceProvider), Set.of());
  78         listeners.add(listener);
  79         return () -> listeners.remove(listener);
  80     }
  81 }