bgp/openconfig-spi/src/main/java/org/opendaylight/protocol/bgp/openconfig/spi/AbstractBGPTableTypeRegistryProviderActivator.java

   1 /*
   2  * Copyright (c) 2016 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.protocol.bgp.openconfig.spi;
  10
  11 import static java.util.Objects.requireNonNull;
  12
  13 import com.google.common.base.Preconditions;
  14 import java.util.List;
  15 import javax.annotation.concurrent.GuardedBy;
  16 import org.opendaylight.yangtools.concepts.AbstractRegistration;
  17
  18 public abstract class AbstractBGPTableTypeRegistryProviderActivator implements AutoCloseable, BGPTableTypeRegistryProviderActivator {
  19
  20     @GuardedBy("this")
  21     private List<AbstractRegistration> registrations;
  22
  23     @GuardedBy("this")
  24     protected abstract List<AbstractRegistration> startBGPTableTypeRegistryProviderImpl(BGPTableTypeRegistryProvider provider);
  25
  26     @Override
  27     public final synchronized void startBGPTableTypeRegistryProvider(final BGPTableTypeRegistryProvider provider) {
  28         Preconditions.checkState(this.registrations == null);
  29         this.registrations = requireNonNull(startBGPTableTypeRegistryProviderImpl(provider));
  30     }
  31
  32     @Override
  33     public final synchronized void stopBGPTableTypeRegistryProvider() {
  34         if (this.registrations == null) {
  35             return;
  36         }
  37         this.registrations.forEach(AbstractRegistration::close);
  38         this.registrations = null;
  39     }
  40
  41     @Override
  42     public final void close() {
  43         stopBGPTableTypeRegistryProvider();
  44     }
  45 }