opendaylight/netconf/mdsal-netconf-connector/src/main/java/org/opendaylight/controller/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.controller.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.controller.netconf.api.Capability;
  17 import org.opendaylight.controller.netconf.api.monitoring.CapabilityListener;
  18 import org.opendaylight.controller.sal.core.api.model.SchemaService;
  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
  23 public class CurrentSchemaContext implements SchemaContextListener, AutoCloseable {
  24     final AtomicReference<SchemaContext> currentContext = new AtomicReference<SchemaContext>();
  25     private final ListenerRegistration<SchemaContextListener> schemaContextListenerListenerRegistration;
  26     private final Set<CapabilityListener> listeners = Collections.synchronizedSet(Sets.<CapabilityListener>newHashSet());
  27
  28     public SchemaContext getCurrentContext() {
  29         Preconditions.checkState(currentContext.get() != null, "Current context not received");
  30         return currentContext.get();
  31     }
  32
  33     public CurrentSchemaContext(final SchemaService schemaService) {
  34         schemaContextListenerListenerRegistration = schemaService.registerSchemaContextListener(this);
  35     }
  36
  37     @Override
  38     public void onGlobalContextUpdated(final SchemaContext schemaContext) {
  39         currentContext.set(schemaContext);
  40         // FIXME is notifying all the listeners from this callback wise ?
  41         final Set<Capability> addedCaps = MdsalNetconfOperationServiceFactory.transformCapabilities(currentContext.get());
  42         for (final CapabilityListener listener : listeners) {
  43             listener.onCapabilitiesAdded(addedCaps);
  44         }
  45     }
  46
  47     @Override
  48     public void close() throws Exception {
  49         listeners.clear();
  50         schemaContextListenerListenerRegistration.close();
  51         currentContext.set(null);
  52     }
  53
  54     public AutoCloseable registerCapabilityListener(final CapabilityListener listener) {
  55         listener.onCapabilitiesAdded(MdsalNetconfOperationServiceFactory.transformCapabilities(currentContext.get()));
  56         listeners.add(listener);
  57         return new AutoCloseable() {
  58             @Override
  59             public void close() throws Exception {
  60                 listeners.remove(listener);
  61             }
  62         };
  63     }
  64 }